/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:57:50,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:57:50,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:57:50,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 22:57:50,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:57:50,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:57:50,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:57:50,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:57:50,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:57:50,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:57:50,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:57:50,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:57:50,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:57:50,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:57:50,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:57:50,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:57:50,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 22:57:50,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:57:50,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:57:50,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:57:50,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 22:57:50,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:57:50,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:57:50,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:57:50,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:57:50,324 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:57:50,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:57:50,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:57:50,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:57:50,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:57:50,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:57:50,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:57:50,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:57:50,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:57:50,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:57:50,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:57:50,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:57:50,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:57:50,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:57:50,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:57:50,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:57:50,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:57:50,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:57:50,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:57:50,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:57:50,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:57:50,330 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:57:50,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:57:50,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:57:50,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:57:50,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:57:50,765 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:57:50,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-2.i [2021-01-06 22:57:50,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4068544fb/7dc6b2f811a448759f0b121e331e0834/FLAG9f6562648 [2021-01-06 22:57:51,521 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:57:51,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i [2021-01-06 22:57:51,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4068544fb/7dc6b2f811a448759f0b121e331e0834/FLAG9f6562648 [2021-01-06 22:57:51,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4068544fb/7dc6b2f811a448759f0b121e331e0834 [2021-01-06 22:57:51,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:57:51,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:57:51,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:57:51,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:57:51,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:57:51,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:57:51" (1/1) ... [2021-01-06 22:57:51,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12587fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:51, skipping insertion in model container [2021-01-06 22:57:51,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:57:51" (1/1) ... [2021-01-06 22:57:51,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:57:51,880 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:57:52,275 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2021-01-06 22:57:52,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:57:52,290 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:57:52,377 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2021-01-06 22:57:52,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:57:52,530 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:57:52,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52 WrapperNode [2021-01-06 22:57:52,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:57:52,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:57:52,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:57:52,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:57:52,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:57:52,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:57:52,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:57:52,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:57:52,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... [2021-01-06 22:57:52,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:57:52,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:57:52,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:57:52,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:57:52,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:57:52,744 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-06 22:57:52,745 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-06 22:57:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-06 22:57:52,745 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-06 22:57:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:57:52,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-06 22:57:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:57:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:57:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:57:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-06 22:57:52,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:57:52,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:57:52,749 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-06 22:57:53,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:57:53,354 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 22:57:53,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:53 BoogieIcfgContainer [2021-01-06 22:57:53,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:57:53,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:57:53,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:57:53,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:57:53,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:57:51" (1/3) ... [2021-01-06 22:57:53,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd0fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:57:53, skipping insertion in model container [2021-01-06 22:57:53,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:52" (2/3) ... [2021-01-06 22:57:53,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cd0fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:57:53, skipping insertion in model container [2021-01-06 22:57:53,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:53" (3/3) ... [2021-01-06 22:57:53,372 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-01-06 22:57:53,386 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:57:53,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:57:53,393 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 22:57:53,394 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:57:53,439 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,440 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,440 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,441 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,441 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,441 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,442 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,443 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,444 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,444 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,446 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,446 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,447 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,447 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,448 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,448 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,448 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,449 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,449 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,450 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,451 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,452 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,452 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,452 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,453 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,454 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,455 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,456 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,457 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,458 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,459 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,460 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,460 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,460 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,461 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,461 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,461 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,463 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,463 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,466 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,468 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,477 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,477 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,477 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,477 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,478 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,478 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:53,480 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-06 22:57:53,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 22:57:53,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:57:53,553 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:57:53,553 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:57:53,554 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:57:53,554 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:57:53,554 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:57:53,554 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:57:53,554 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:57:53,572 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:57:53,574 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:53,578 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:53,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:53,648 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2021-01-06 22:57:53,649 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-01-06 22:57:53,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-01-06 22:57:53,675 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2021-01-06 22:57:55,611 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:57:55,774 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:57:56,449 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:57:56,593 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:57:56,896 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:57:57,035 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:57:57,062 INFO L131 LiptonReduction]: Checked pairs total: 998 [2021-01-06 22:57:57,063 INFO L133 LiptonReduction]: Total number of compositions: 52 [2021-01-06 22:57:57,070 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-01-06 22:57:57,080 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2021-01-06 22:57:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 22:57:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 22:57:57,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:57,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 22:57:57,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:57,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2021-01-06 22:57:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:57,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824169636] [2021-01-06 22:57:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:57,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824169636] [2021-01-06 22:57:57,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:57,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:57:57,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001278853] [2021-01-06 22:57:57,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:57:57,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:57:57,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:57:57,448 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-01-06 22:57:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:57,527 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2021-01-06 22:57:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:57:57,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 22:57:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:57,557 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:57:57,558 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 22:57:57,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 22:57:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-01-06 22:57:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:57:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2021-01-06 22:57:57,618 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2021-01-06 22:57:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:57,619 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2021-01-06 22:57:57,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:57:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2021-01-06 22:57:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:57:57,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:57,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:57,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 22:57:57,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2021-01-06 22:57:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:57,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923979754] [2021-01-06 22:57:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923979754] [2021-01-06 22:57:57,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:57,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:57:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327754967] [2021-01-06 22:57:57,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:57:57,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:57:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:57,792 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2021-01-06 22:57:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:57,836 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2021-01-06 22:57:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:57:57,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:57:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:57,839 INFO L225 Difference]: With dead ends: 86 [2021-01-06 22:57:57,839 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 22:57:57,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:57,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 22:57:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-01-06 22:57:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 22:57:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2021-01-06 22:57:57,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2021-01-06 22:57:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:57,852 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2021-01-06 22:57:57,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:57:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2021-01-06 22:57:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:57:57,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:57,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:57,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 22:57:57,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2021-01-06 22:57:57,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:57,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222801273] [2021-01-06 22:57:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:57,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222801273] [2021-01-06 22:57:57,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:57:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140230070] [2021-01-06 22:57:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:57:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:57:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:57,928 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2021-01-06 22:57:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:57,977 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2021-01-06 22:57:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 22:57:57,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:57:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:57,979 INFO L225 Difference]: With dead ends: 62 [2021-01-06 22:57:57,979 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 22:57:57,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:57:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 22:57:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 22:57:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:57:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2021-01-06 22:57:57,987 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2021-01-06 22:57:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:57,988 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2021-01-06 22:57:57,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:57:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2021-01-06 22:57:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:57:57,989 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:57,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:57,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 22:57:57,990 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2021-01-06 22:57:57,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:57,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227475169] [2021-01-06 22:57:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:58,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227475169] [2021-01-06 22:57:58,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:58,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:57:58,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365908511] [2021-01-06 22:57:58,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:57:58,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:57:58,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:58,054 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2021-01-06 22:57:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:58,100 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2021-01-06 22:57:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:57:58,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:57:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:58,110 INFO L225 Difference]: With dead ends: 56 [2021-01-06 22:57:58,110 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 22:57:58,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 22:57:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 22:57:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 22:57:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:57:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-01-06 22:57:58,127 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-01-06 22:57:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:58,127 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-01-06 22:57:58,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:57:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-01-06 22:57:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:57:58,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:58,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:58,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 22:57:58,132 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2021-01-06 22:57:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:58,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295895869] [2021-01-06 22:57:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:58,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295895869] [2021-01-06 22:57:58,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:58,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:57:58,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534720385] [2021-01-06 22:57:58,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:57:58,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:58,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:57:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:58,258 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2021-01-06 22:57:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:58,326 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2021-01-06 22:57:58,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:57:58,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:57:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:58,328 INFO L225 Difference]: With dead ends: 58 [2021-01-06 22:57:58,328 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 22:57:58,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:57:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 22:57:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-01-06 22:57:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 22:57:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2021-01-06 22:57:58,344 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2021-01-06 22:57:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:58,345 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2021-01-06 22:57:58,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:57:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2021-01-06 22:57:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:57:58,346 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:58,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:58,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 22:57:58,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2021-01-06 22:57:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261831716] [2021-01-06 22:57:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:58,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261831716] [2021-01-06 22:57:58,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:58,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:57:58,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458906449] [2021-01-06 22:57:58,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:57:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:58,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:57:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:58,460 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2021-01-06 22:57:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:58,523 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2021-01-06 22:57:58,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:57:58,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:57:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:58,526 INFO L225 Difference]: With dead ends: 78 [2021-01-06 22:57:58,526 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:57:58,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:57:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:57:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-01-06 22:57:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:57:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2021-01-06 22:57:58,545 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2021-01-06 22:57:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:58,545 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2021-01-06 22:57:58,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:57:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2021-01-06 22:57:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:57:58,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:58,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:58,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 22:57:58,551 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:58,552 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2021-01-06 22:57:58,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:58,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567791616] [2021-01-06 22:57:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:58,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567791616] [2021-01-06 22:57:58,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:58,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:57:58,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416472682] [2021-01-06 22:57:58,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:57:58,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:58,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:57:58,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:58,679 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2021-01-06 22:57:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:58,782 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2021-01-06 22:57:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:57:58,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:57:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:58,784 INFO L225 Difference]: With dead ends: 54 [2021-01-06 22:57:58,784 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 22:57:58,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:57:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 22:57:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2021-01-06 22:57:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 22:57:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2021-01-06 22:57:58,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2021-01-06 22:57:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:58,789 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2021-01-06 22:57:58,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:57:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2021-01-06 22:57:58,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:57:58,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:58,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:58,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 22:57:58,790 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2021-01-06 22:57:58,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:58,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22461265] [2021-01-06 22:57:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:58,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22461265] [2021-01-06 22:57:58,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:58,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:57:58,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354622651] [2021-01-06 22:57:58,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:57:58,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:57:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:58,869 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2021-01-06 22:57:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:59,014 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2021-01-06 22:57:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 22:57:59,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:57:59,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:59,016 INFO L225 Difference]: With dead ends: 55 [2021-01-06 22:57:59,016 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:57:59,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:57:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:57:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-01-06 22:57:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 22:57:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-01-06 22:57:59,027 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-01-06 22:57:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:59,027 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-01-06 22:57:59,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:57:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-01-06 22:57:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:57:59,028 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:59,028 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:59,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 22:57:59,028 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2021-01-06 22:57:59,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:59,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096066621] [2021-01-06 22:57:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096066621] [2021-01-06 22:57:59,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814683815] [2021-01-06 22:57:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:57:59,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:57:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:57:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:57:59,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:57:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:57:59,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:57:59,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830130476] [2021-01-06 22:57:59,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:57:59,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:57:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:57:59,297 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2021-01-06 22:57:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:59,385 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2021-01-06 22:57:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:57:59,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 22:57:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:59,387 INFO L225 Difference]: With dead ends: 55 [2021-01-06 22:57:59,387 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:57:59,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:57:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:57:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-01-06 22:57:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 22:57:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-01-06 22:57:59,392 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2021-01-06 22:57:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:59,392 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-01-06 22:57:59,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:57:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-01-06 22:57:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:57:59,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:59,393 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:59,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 22:57:59,608 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2021-01-06 22:57:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:59,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801779383] [2021-01-06 22:57:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801779383] [2021-01-06 22:57:59,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499185142] [2021-01-06 22:57:59,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:57:59,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:57:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:57:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:57:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:57:59,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:57:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:57:59,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 22:57:59,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314396811] [2021-01-06 22:57:59,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:57:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:59,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:57:59,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:57:59,870 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2021-01-06 22:58:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,035 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2021-01-06 22:58:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:58:00,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 22:58:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,037 INFO L225 Difference]: With dead ends: 72 [2021-01-06 22:58:00,037 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 22:58:00,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 22:58:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2021-01-06 22:58:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 22:58:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 121 transitions. [2021-01-06 22:58:00,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 121 transitions. Word has length 11 [2021-01-06 22:58:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,042 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 121 transitions. [2021-01-06 22:58:00,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 121 transitions. [2021-01-06 22:58:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:00,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,043 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 22:58:00,259 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1328990746, now seen corresponding path program 7 times [2021-01-06 22:58:00,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544792096] [2021-01-06 22:58:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:00,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544792096] [2021-01-06 22:58:00,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848888413] [2021-01-06 22:58:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:00,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:00,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:00,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:58:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785028095] [2021-01-06 22:58:00,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:00,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:00,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:00,438 INFO L87 Difference]: Start difference. First operand 51 states and 121 transitions. Second operand 8 states. [2021-01-06 22:58:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,576 INFO L93 Difference]: Finished difference Result 92 states and 215 transitions. [2021-01-06 22:58:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:00,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 22:58:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,577 INFO L225 Difference]: With dead ends: 92 [2021-01-06 22:58:00,577 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:00,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-01-06 22:58:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2021-01-06 22:58:00,582 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 12 [2021-01-06 22:58:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,583 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2021-01-06 22:58:00,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2021-01-06 22:58:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:00,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 22:58:00,798 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1328272662, now seen corresponding path program 8 times [2021-01-06 22:58:00,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045598746] [2021-01-06 22:58:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045598746] [2021-01-06 22:58:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909187906] [2021-01-06 22:58:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:01,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:01,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:01,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:01,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:01,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354282337] [2021-01-06 22:58:01,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:01,094 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand 9 states. [2021-01-06 22:58:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:01,245 INFO L93 Difference]: Finished difference Result 72 states and 172 transitions. [2021-01-06 22:58:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:01,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 22:58:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:01,246 INFO L225 Difference]: With dead ends: 72 [2021-01-06 22:58:01,246 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 22:58:01,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 22:58:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-01-06 22:58:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-01-06 22:58:01,250 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 12 [2021-01-06 22:58:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:01,251 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-01-06 22:58:01,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-01-06 22:58:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:01,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:01,252 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:01,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:01,466 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:01,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1277025601, now seen corresponding path program 9 times [2021-01-06 22:58:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:01,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640236912] [2021-01-06 22:58:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:01,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640236912] [2021-01-06 22:58:01,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265746841] [2021-01-06 22:58:01,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:01,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:58:01,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:01,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:01,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 22:58:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335483847] [2021-01-06 22:58:01,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:01,795 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2021-01-06 22:58:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:01,936 INFO L93 Difference]: Finished difference Result 73 states and 169 transitions. [2021-01-06 22:58:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:58:01,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 22:58:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:01,938 INFO L225 Difference]: With dead ends: 73 [2021-01-06 22:58:01,938 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 22:58:01,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 22:58:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2021-01-06 22:58:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2021-01-06 22:58:01,942 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 13 [2021-01-06 22:58:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:01,943 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2021-01-06 22:58:01,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2021-01-06 22:58:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:01,944 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:01,944 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:02,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 22:58:02,160 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash 226675059, now seen corresponding path program 10 times [2021-01-06 22:58:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:02,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383261710] [2021-01-06 22:58:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:02,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383261710] [2021-01-06 22:58:02,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082440185] [2021-01-06 22:58:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:02,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:02,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:02,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:02,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:02,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792442676] [2021-01-06 22:58:02,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:02,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:02,408 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 9 states. [2021-01-06 22:58:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:02,533 INFO L93 Difference]: Finished difference Result 80 states and 183 transitions. [2021-01-06 22:58:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:58:02,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 22:58:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:02,535 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:58:02,536 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 22:58:02,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 22:58:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-01-06 22:58:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-01-06 22:58:02,545 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2021-01-06 22:58:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:02,545 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-01-06 22:58:02,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-01-06 22:58:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:02,546 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:02,546 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:02,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:02,760 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash 916634619, now seen corresponding path program 11 times [2021-01-06 22:58:02,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:02,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372139949] [2021-01-06 22:58:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372139949] [2021-01-06 22:58:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86969356] [2021-01-06 22:58:02,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:02,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:02,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:03,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:03,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:03,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850754033] [2021-01-06 22:58:03,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:03,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:03,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:03,035 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 9 states. [2021-01-06 22:58:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:03,195 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2021-01-06 22:58:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:03,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2021-01-06 22:58:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:03,197 INFO L225 Difference]: With dead ends: 94 [2021-01-06 22:58:03,197 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 22:58:03,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 22:58:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-01-06 22:58:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2021-01-06 22:58:03,201 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 13 [2021-01-06 22:58:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:03,202 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2021-01-06 22:58:03,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2021-01-06 22:58:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:03,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:03,202 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:03,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 22:58:03,416 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash 917352703, now seen corresponding path program 12 times [2021-01-06 22:58:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:03,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037652119] [2021-01-06 22:58:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037652119] [2021-01-06 22:58:03,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533548435] [2021-01-06 22:58:03,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:03,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:58:03,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:03,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:03,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:03,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 22:58:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568301364] [2021-01-06 22:58:03,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:03,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:03,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:03,619 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 11 states. [2021-01-06 22:58:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:03,964 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-01-06 22:58:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:58:03,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 22:58:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:03,965 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:58:03,965 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:03,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:58:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-01-06 22:58:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 136 transitions. [2021-01-06 22:58:03,970 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 136 transitions. Word has length 13 [2021-01-06 22:58:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:03,970 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 136 transitions. [2021-01-06 22:58:03,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 136 transitions. [2021-01-06 22:58:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:03,971 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:03,971 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:04,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 22:58:04,186 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1554689406, now seen corresponding path program 13 times [2021-01-06 22:58:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131058185] [2021-01-06 22:58:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:04,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131058185] [2021-01-06 22:58:04,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569418249] [2021-01-06 22:58:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:04,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:04,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:04,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-01-06 22:58:04,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921869546] [2021-01-06 22:58:04,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:04,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:04,405 INFO L87 Difference]: Start difference. First operand 57 states and 136 transitions. Second operand 9 states. [2021-01-06 22:58:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:04,581 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2021-01-06 22:58:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:04,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 22:58:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:04,582 INFO L225 Difference]: With dead ends: 74 [2021-01-06 22:58:04,582 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 22:58:04,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 22:58:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2021-01-06 22:58:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2021-01-06 22:58:04,587 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 14 [2021-01-06 22:58:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:04,588 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2021-01-06 22:58:04,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2021-01-06 22:58:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:04,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:04,589 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:04,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 22:58:04,804 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash -864729846, now seen corresponding path program 14 times [2021-01-06 22:58:04,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:04,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799622006] [2021-01-06 22:58:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799622006] [2021-01-06 22:58:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859140579] [2021-01-06 22:58:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:04,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:04,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:04,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-01-06 22:58:04,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718062380] [2021-01-06 22:58:04,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:04,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:04,990 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 9 states. [2021-01-06 22:58:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:05,196 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2021-01-06 22:58:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:05,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 22:58:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:05,197 INFO L225 Difference]: With dead ends: 101 [2021-01-06 22:58:05,198 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:05,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-01-06 22:58:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 22:58:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2021-01-06 22:58:05,202 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 14 [2021-01-06 22:58:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:05,203 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2021-01-06 22:58:05,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2021-01-06 22:58:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:05,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:05,203 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:05,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 22:58:05,417 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:05,418 INFO L82 PathProgramCache]: Analyzing trace with hash -864011762, now seen corresponding path program 15 times [2021-01-06 22:58:05,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:05,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150026701] [2021-01-06 22:58:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150026701] [2021-01-06 22:58:05,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681014134] [2021-01-06 22:58:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:05,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:58:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:05,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:05,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:05,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005960675] [2021-01-06 22:58:05,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:05,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:05,638 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 12 states. [2021-01-06 22:58:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:06,029 INFO L93 Difference]: Finished difference Result 96 states and 229 transitions. [2021-01-06 22:58:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:06,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-06 22:58:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:06,030 INFO L225 Difference]: With dead ends: 96 [2021-01-06 22:58:06,030 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 22:58:06,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 22:58:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-01-06 22:58:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 22:58:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2021-01-06 22:58:06,035 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2021-01-06 22:58:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:06,035 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2021-01-06 22:58:06,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2021-01-06 22:58:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:06,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:06,036 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:06,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:06,251 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1138913507, now seen corresponding path program 16 times [2021-01-06 22:58:06,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:06,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630406289] [2021-01-06 22:58:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:06,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630406289] [2021-01-06 22:58:06,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188919589] [2021-01-06 22:58:06,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:06,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:06,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:06,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:06,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877445214] [2021-01-06 22:58:06,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:06,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:06,498 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 12 states. [2021-01-06 22:58:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:06,680 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2021-01-06 22:58:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:58:06,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:58:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:06,681 INFO L225 Difference]: With dead ends: 66 [2021-01-06 22:58:06,681 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 22:58:06,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:06,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 22:58:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 22:58:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-01-06 22:58:06,685 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 15 [2021-01-06 22:58:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:06,686 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-01-06 22:58:06,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-01-06 22:58:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:06,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:06,686 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:06,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:06,900 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1208469809, now seen corresponding path program 17 times [2021-01-06 22:58:06,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:06,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719546593] [2021-01-06 22:58:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:07,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719546593] [2021-01-06 22:58:07,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172896905] [2021-01-06 22:58:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:07,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:58:07,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:07,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:07,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:07,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 22:58:07,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694860422] [2021-01-06 22:58:07,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:07,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:07,125 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand 11 states. [2021-01-06 22:58:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:07,296 INFO L93 Difference]: Finished difference Result 92 states and 207 transitions. [2021-01-06 22:58:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:07,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 22:58:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:07,302 INFO L225 Difference]: With dead ends: 92 [2021-01-06 22:58:07,302 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 22:58:07,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 22:58:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-01-06 22:58:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2021-01-06 22:58:07,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 15 [2021-01-06 22:58:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:07,315 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2021-01-06 22:58:07,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2021-01-06 22:58:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:07,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:07,316 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:07,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 22:58:07,531 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:07,532 INFO L82 PathProgramCache]: Analyzing trace with hash 417703767, now seen corresponding path program 18 times [2021-01-06 22:58:07,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:07,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000487360] [2021-01-06 22:58:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:07,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000487360] [2021-01-06 22:58:07,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386470436] [2021-01-06 22:58:07,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:07,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:58:07,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:07,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:07,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:07,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 22:58:07,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223469235] [2021-01-06 22:58:07,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:07,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:07,737 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 11 states. [2021-01-06 22:58:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:07,956 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2021-01-06 22:58:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:07,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 22:58:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:07,959 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:07,959 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:58:07,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:58:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-01-06 22:58:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 22:58:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 145 transitions. [2021-01-06 22:58:07,963 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 145 transitions. Word has length 15 [2021-01-06 22:58:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:07,963 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 145 transitions. [2021-01-06 22:58:07,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 145 transitions. [2021-01-06 22:58:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:07,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:07,964 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:08,178 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1107663327, now seen corresponding path program 19 times [2021-01-06 22:58:08,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115477277] [2021-01-06 22:58:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115477277] [2021-01-06 22:58:08,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753139656] [2021-01-06 22:58:08,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:08,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:08,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 22:58:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943813242] [2021-01-06 22:58:08,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:08,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:08,388 INFO L87 Difference]: Start difference. First operand 60 states and 145 transitions. Second operand 11 states. [2021-01-06 22:58:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:08,616 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2021-01-06 22:58:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:08,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 22:58:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:08,618 INFO L225 Difference]: With dead ends: 112 [2021-01-06 22:58:08,618 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 22:58:08,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:58:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 22:58:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-01-06 22:58:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 22:58:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2021-01-06 22:58:08,624 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 15 [2021-01-06 22:58:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:08,625 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2021-01-06 22:58:08,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2021-01-06 22:58:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:08,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:08,627 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 22:58:08,841 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1108381411, now seen corresponding path program 20 times [2021-01-06 22:58:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250776427] [2021-01-06 22:58:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250776427] [2021-01-06 22:58:08,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091243350] [2021-01-06 22:58:08,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:09,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:09,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:09,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:09,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 22:58:09,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451928137] [2021-01-06 22:58:09,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:09,107 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 13 states. [2021-01-06 22:58:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,448 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-01-06 22:58:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:09,449 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 22:58:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,450 INFO L225 Difference]: With dead ends: 107 [2021-01-06 22:58:09,450 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 22:58:09,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 22:58:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-01-06 22:58:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 150 transitions. [2021-01-06 22:58:09,454 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 150 transitions. Word has length 15 [2021-01-06 22:58:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,455 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 150 transitions. [2021-01-06 22:58:09,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 150 transitions. [2021-01-06 22:58:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:09,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,456 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:09,669 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,670 INFO L82 PathProgramCache]: Analyzing trace with hash 592230430, now seen corresponding path program 21 times [2021-01-06 22:58:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284859471] [2021-01-06 22:58:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284859471] [2021-01-06 22:58:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522960508] [2021-01-06 22:58:09,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:09,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:09,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272983626] [2021-01-06 22:58:09,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:09,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:09,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:09,911 INFO L87 Difference]: Start difference. First operand 63 states and 150 transitions. Second operand 12 states. [2021-01-06 22:58:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,160 INFO L93 Difference]: Finished difference Result 82 states and 189 transitions. [2021-01-06 22:58:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:10,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,162 INFO L225 Difference]: With dead ends: 82 [2021-01-06 22:58:10,162 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 22:58:10,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:58:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 22:58:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-01-06 22:58:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2021-01-06 22:58:10,166 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 16 [2021-01-06 22:58:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,167 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2021-01-06 22:58:10,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2021-01-06 22:58:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:10,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,168 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 22:58:10,383 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2076563290, now seen corresponding path program 22 times [2021-01-06 22:58:10,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643060663] [2021-01-06 22:58:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:10,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643060663] [2021-01-06 22:58:10,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612248426] [2021-01-06 22:58:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:10,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:10,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:10,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:10,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:10,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775794319] [2021-01-06 22:58:10,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:10,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:10,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:10,616 INFO L87 Difference]: Start difference. First operand 64 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:10,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,871 INFO L93 Difference]: Finished difference Result 87 states and 201 transitions. [2021-01-06 22:58:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:10,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,872 INFO L225 Difference]: With dead ends: 87 [2021-01-06 22:58:10,873 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 22:58:10,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 22:58:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-01-06 22:58:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:58:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2021-01-06 22:58:10,877 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 16 [2021-01-06 22:58:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,877 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2021-01-06 22:58:10,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2021-01-06 22:58:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:10,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,878 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:11,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 22:58:11,092 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1386603730, now seen corresponding path program 23 times [2021-01-06 22:58:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:11,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359983135] [2021-01-06 22:58:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359983135] [2021-01-06 22:58:11,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419972763] [2021-01-06 22:58:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:11,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:58:11,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:11,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:11,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004006636] [2021-01-06 22:58:11,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:11,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:11,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:11,334 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 12 states. [2021-01-06 22:58:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:11,637 INFO L93 Difference]: Finished difference Result 109 states and 257 transitions. [2021-01-06 22:58:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:11,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:11,639 INFO L225 Difference]: With dead ends: 109 [2021-01-06 22:58:11,639 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:11,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2021-01-06 22:58:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:11,644 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 16 [2021-01-06 22:58:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:11,644 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:11,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:11,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:11,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:11,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 22:58:11,863 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1385885646, now seen corresponding path program 24 times [2021-01-06 22:58:11,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:11,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233444203] [2021-01-06 22:58:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:11,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233444203] [2021-01-06 22:58:11,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146805657] [2021-01-06 22:58:11,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:58:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:12,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:12,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752832701] [2021-01-06 22:58:12,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:12,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:12,102 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 13 states. [2021-01-06 22:58:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:12,530 INFO L93 Difference]: Finished difference Result 88 states and 212 transitions. [2021-01-06 22:58:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:12,531 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 22:58:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:12,532 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:12,532 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 22:58:12,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:58:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 22:58:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-01-06 22:58:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2021-01-06 22:58:12,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 16 [2021-01-06 22:58:12,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:12,536 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2021-01-06 22:58:12,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2021-01-06 22:58:12,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:12,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:12,536 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:12,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 22:58:12,751 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 720910841, now seen corresponding path program 25 times [2021-01-06 22:58:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:12,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884202229] [2021-01-06 22:58:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:12,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884202229] [2021-01-06 22:58:12,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832700858] [2021-01-06 22:58:12,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:13,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-06 22:58:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211565075] [2021-01-06 22:58:13,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:13,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:13,024 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 14 states. [2021-01-06 22:58:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,269 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2021-01-06 22:58:13,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:58:13,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,271 INFO L225 Difference]: With dead ends: 97 [2021-01-06 22:58:13,271 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 22:58:13,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:58:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 22:58:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2021-01-06 22:58:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 22:58:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2021-01-06 22:58:13,275 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 17 [2021-01-06 22:58:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,275 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2021-01-06 22:58:13,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2021-01-06 22:58:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:13,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,276 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:13,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 22:58:13,492 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1698185941, now seen corresponding path program 26 times [2021-01-06 22:58:13,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:13,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179244978] [2021-01-06 22:58:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179244978] [2021-01-06 22:58:13,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390780563] [2021-01-06 22:58:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:13,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:13,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:13,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:13,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453744814] [2021-01-06 22:58:13,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:13,758 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 13 states. [2021-01-06 22:58:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,965 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2021-01-06 22:58:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:13,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,967 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:58:13,967 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:13,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:58:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2021-01-06 22:58:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2021-01-06 22:58:13,971 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 17 [2021-01-06 22:58:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,971 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2021-01-06 22:58:13,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2021-01-06 22:58:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:13,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,972 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:14,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:14,186 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1981492147, now seen corresponding path program 27 times [2021-01-06 22:58:14,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:14,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928315043] [2021-01-06 22:58:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:14,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928315043] [2021-01-06 22:58:14,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282180556] [2021-01-06 22:58:14,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:14,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:14,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:14,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:14,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195998979] [2021-01-06 22:58:14,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:14,470 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 13 states. [2021-01-06 22:58:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:14,707 INFO L93 Difference]: Finished difference Result 99 states and 229 transitions. [2021-01-06 22:58:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:14,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:14,709 INFO L225 Difference]: With dead ends: 99 [2021-01-06 22:58:14,709 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 22:58:14,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:58:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 22:58:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2021-01-06 22:58:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:58:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2021-01-06 22:58:14,715 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 17 [2021-01-06 22:58:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:14,715 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2021-01-06 22:58:14,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2021-01-06 22:58:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:14,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:14,717 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:14,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 22:58:14,932 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -687301573, now seen corresponding path program 28 times [2021-01-06 22:58:14,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:14,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235702127] [2021-01-06 22:58:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:15,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235702127] [2021-01-06 22:58:15,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120717177] [2021-01-06 22:58:15,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:15,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:15,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:15,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:15,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:15,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339698307] [2021-01-06 22:58:15,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:15,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:15,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:15,186 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 13 states. [2021-01-06 22:58:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:15,513 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2021-01-06 22:58:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:15,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:15,516 INFO L225 Difference]: With dead ends: 93 [2021-01-06 22:58:15,516 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 22:58:15,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 22:58:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2021-01-06 22:58:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2021-01-06 22:58:15,524 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 17 [2021-01-06 22:58:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:15,525 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2021-01-06 22:58:15,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2021-01-06 22:58:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:15,525 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:15,525 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:15,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:15,739 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2657987, now seen corresponding path program 29 times [2021-01-06 22:58:15,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:15,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256744867] [2021-01-06 22:58:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:15,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256744867] [2021-01-06 22:58:15,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585678336] [2021-01-06 22:58:15,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:15,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:58:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:15,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:15,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382052659] [2021-01-06 22:58:15,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:15,956 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 13 states. [2021-01-06 22:58:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:16,331 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2021-01-06 22:58:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:16,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:16,333 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:58:16,333 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 22:58:16,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 22:58:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2021-01-06 22:58:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:58:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2021-01-06 22:58:16,337 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 17 [2021-01-06 22:58:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:16,338 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2021-01-06 22:58:16,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2021-01-06 22:58:16,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:16,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:16,338 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:16,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 22:58:16,552 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash 3376071, now seen corresponding path program 30 times [2021-01-06 22:58:16,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:16,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230498015] [2021-01-06 22:58:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230498015] [2021-01-06 22:58:16,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747477542] [2021-01-06 22:58:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:16,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 22:58:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:16,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:16,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:16,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:16,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927856737] [2021-01-06 22:58:16,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:16,776 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 14 states. [2021-01-06 22:58:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:17,282 INFO L93 Difference]: Finished difference Result 90 states and 216 transitions. [2021-01-06 22:58:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:17,282 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:17,283 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:17,283 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:17,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-01-06 22:58:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-01-06 22:58:17,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2021-01-06 22:58:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:17,291 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-01-06 22:58:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-01-06 22:58:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:17,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:17,291 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:17,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 22:58:17,505 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 31 times [2021-01-06 22:58:17,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:17,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760300073] [2021-01-06 22:58:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760300073] [2021-01-06 22:58:17,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547453639] [2021-01-06 22:58:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:17,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:17,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:17,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273787261] [2021-01-06 22:58:17,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:17,771 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2021-01-06 22:58:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:18,068 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2021-01-06 22:58:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:18,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:18,070 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:18,070 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:18,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-01-06 22:58:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:18,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2021-01-06 22:58:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:18,075 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:18,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:18,075 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:18,075 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:18,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 22:58:18,290 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:18,291 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 32 times [2021-01-06 22:58:18,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:18,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789268407] [2021-01-06 22:58:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789268407] [2021-01-06 22:58:18,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231828670] [2021-01-06 22:58:18,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:18,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:18,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:18,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496855206] [2021-01-06 22:58:18,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:18,536 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2021-01-06 22:58:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:18,897 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2021-01-06 22:58:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:18,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:18,898 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:18,899 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:18,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-01-06 22:58:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2021-01-06 22:58:18,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2021-01-06 22:58:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:18,903 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2021-01-06 22:58:18,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2021-01-06 22:58:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:18,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:18,904 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:19,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 22:58:19,119 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 33 times [2021-01-06 22:58:19,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:19,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573614155] [2021-01-06 22:58:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:19,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573614155] [2021-01-06 22:58:19,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957467157] [2021-01-06 22:58:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:19,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 22:58:19,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:19,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:19,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:19,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906289418] [2021-01-06 22:58:19,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:19,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:19,364 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2021-01-06 22:58:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:19,711 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2021-01-06 22:58:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:19,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:19,713 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:19,713 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 22:58:19,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 22:58:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2021-01-06 22:58:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-01-06 22:58:19,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2021-01-06 22:58:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:19,717 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-01-06 22:58:19,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-01-06 22:58:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:19,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:19,718 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:19,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 22:58:19,932 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 34 times [2021-01-06 22:58:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:19,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135213164] [2021-01-06 22:58:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135213164] [2021-01-06 22:58:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867437384] [2021-01-06 22:58:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:20,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:20,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:20,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:20,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442257303] [2021-01-06 22:58:20,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:20,166 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2021-01-06 22:58:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:20,559 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2021-01-06 22:58:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:20,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:20,561 INFO L225 Difference]: With dead ends: 105 [2021-01-06 22:58:20,561 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 22:58:20,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 22:58:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2021-01-06 22:58:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:20,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2021-01-06 22:58:20,565 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2021-01-06 22:58:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:20,566 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2021-01-06 22:58:20,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2021-01-06 22:58:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:20,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:20,566 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:20,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:20,781 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 35 times [2021-01-06 22:58:20,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177778564] [2021-01-06 22:58:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177778564] [2021-01-06 22:58:20,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511920454] [2021-01-06 22:58:20,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:20,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:58:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:21,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-06 22:58:21,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949162497] [2021-01-06 22:58:21,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:21,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:21,030 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 15 states. [2021-01-06 22:58:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:21,589 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-01-06 22:58:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:21,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 22:58:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:21,591 INFO L225 Difference]: With dead ends: 100 [2021-01-06 22:58:21,591 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 22:58:21,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 22:58:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2021-01-06 22:58:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-01-06 22:58:21,596 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2021-01-06 22:58:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:21,597 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-01-06 22:58:21,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-01-06 22:58:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:21,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:21,597 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:21,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 22:58:21,809 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 36 times [2021-01-06 22:58:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:21,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950900898] [2021-01-06 22:58:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 22:58:21,822 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 22:58:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 22:58:21,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 22:58:21,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 22:58:21,859 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 22:58:21,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-01-06 22:58:21,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 10:58:21 BasicIcfg [2021-01-06 22:58:21,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 22:58:21,915 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 22:58:21,915 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 22:58:21,916 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 22:58:21,916 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:53" (3/4) ... [2021-01-06 22:58:21,918 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 22:58:21,984 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-2.i-witness.graphml [2021-01-06 22:58:21,984 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 22:58:21,986 INFO L168 Benchmark]: Toolchain (without parser) took 30210.17 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 124.9 MB in the beginning and 110.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 179.8 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,986 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 22:58:21,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 751.55 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 128.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,987 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.09 ms. Allocated memory is still 151.0 MB. Free memory was 128.4 MB in the beginning and 126.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,987 INFO L168 Benchmark]: Boogie Preprocessor took 51.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 125.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,987 INFO L168 Benchmark]: RCFGBuilder took 718.15 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 104.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,988 INFO L168 Benchmark]: TraceAbstraction took 28554.19 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.3 MB in the beginning and 116.0 MB in the end (delta: -11.6 MB). Peak memory consumption was 153.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,988 INFO L168 Benchmark]: Witness Printer took 69.32 ms. Allocated memory is still 314.6 MB. Free memory was 116.0 MB in the beginning and 110.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-01-06 22:58:21,991 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 751.55 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 128.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.09 ms. Allocated memory is still 151.0 MB. Free memory was 128.4 MB in the beginning and 126.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 125.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 718.15 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 104.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28554.19 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 104.3 MB in the beginning and 116.0 MB in the end (delta: -11.6 MB). Peak memory consumption was 153.0 MB. Max. memory is 8.0 GB. * Witness Printer took 69.32 ms. Allocated memory is still 314.6 MB. Free memory was 116.0 MB in the beginning and 110.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.4s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28.3s, OverallIterations: 40, TraceHistogramMax: 5, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 589 SDtfs, 1679 SDslu, 2183 SDs, 0 SdLazy, 2394 SolverSat, 1027 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1098 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 756 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 1020 NumberOfCodeBlocks, 1020 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 932 ConstructedInterpolants, 0 QuantifiedInterpolants, 57800 SizeOfPredicates, 208 NumberOfNonLiveVariables, 3570 ConjunctsInSsa, 404 ConjunctsInUnsatCore, 70 InterpolantComputations, 8 PerfectInterpolantSequences, 36/630 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 proved your program to be incorrect! Received shutdown request...