/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-06 01:19:37,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-06 01:19:37,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-06 01:19:37,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-06 01:19:37,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-06 01:19:37,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-06 01:19:37,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-06 01:19:37,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-06 01:19:37,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-06 01:19:37,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-06 01:19:37,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-06 01:19:37,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-06 01:19:37,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-06 01:19:37,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-06 01:19:37,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-06 01:19:37,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-06 01:19:37,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-06 01:19:37,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-06 01:19:37,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-06 01:19:37,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-06 01:19:37,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-06 01:19:37,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-06 01:19:37,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-06 01:19:37,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-06 01:19:37,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-06 01:19:37,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-06 01:19:37,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-06 01:19:37,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-06 01:19:37,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-06 01:19:37,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-06 01:19:37,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-06 01:19:37,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-06 01:19:37,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-06 01:19:37,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-06 01:19:37,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-06 01:19:37,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-06 01:19:37,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-06 01:19:37,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-06 01:19:37,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-06 01:19:37,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-06 01:19:37,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-06 01:19:37,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-06 01:19:37,161 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-06 01:19:37,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-06 01:19:37,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-06 01:19:37,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-06 01:19:37,167 INFO L138 SettingsManager]: * Use SBE=true [2020-10-06 01:19:37,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-06 01:19:37,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-06 01:19:37,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-06 01:19:37,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-06 01:19:37,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-06 01:19:37,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-06 01:19:37,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-06 01:19:37,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-06 01:19:37,169 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-06 01:19:37,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-06 01:19:37,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-06 01:19:37,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-06 01:19:37,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-06 01:19:37,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-06 01:19:37,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-06 01:19:37,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-06 01:19:37,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-06 01:19:37,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-06 01:19:37,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-06 01:19:37,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-06 01:19:37,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-06 01:19:37,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-06 01:19:37,173 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-06 01:19:37,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-06 01:19:37,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-06 01:19:37,173 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-06 01:19:37,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-06 01:19:37,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-06 01:19:37,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-06 01:19:37,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-06 01:19:37,506 INFO L275 PluginConnector]: CDTParser initialized [2020-10-06 01:19:37,507 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-06 01:19:37,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec134920d/e7cdcae92dca4518b2bb499a7f846653/FLAG55099258a [2020-10-06 01:19:38,045 INFO L306 CDTParser]: Found 1 translation units. [2020-10-06 01:19:38,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-10-06 01:19:38,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec134920d/e7cdcae92dca4518b2bb499a7f846653/FLAG55099258a [2020-10-06 01:19:38,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec134920d/e7cdcae92dca4518b2bb499a7f846653 [2020-10-06 01:19:38,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-06 01:19:38,327 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-06 01:19:38,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-06 01:19:38,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-06 01:19:38,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-06 01:19:38,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 01:19:38" (1/1) ... [2020-10-06 01:19:38,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b2b068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:38, skipping insertion in model container [2020-10-06 01:19:38,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.10 01:19:38" (1/1) ... [2020-10-06 01:19:38,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-06 01:19:38,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-06 01:19:39,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-06 01:19:39,169 INFO L203 MainTranslator]: Completed pre-run [2020-10-06 01:19:39,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-06 01:19:39,515 INFO L208 MainTranslator]: Completed translation [2020-10-06 01:19:39,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39 WrapperNode [2020-10-06 01:19:39,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-06 01:19:39,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-06 01:19:39,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-06 01:19:39,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-06 01:19:39,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-06 01:19:39,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-06 01:19:39,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-06 01:19:39,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-06 01:19:39,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... [2020-10-06 01:19:39,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-06 01:19:39,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-06 01:19:39,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-06 01:19:39,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-06 01:19:39,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-06 01:19:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-06 01:19:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-06 01:19:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-06 01:19:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-06 01:19:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-10-06 01:19:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-10-06 01:19:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-10-06 01:19:39,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-06 01:19:39,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-06 01:19:39,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-06 01:19:39,682 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-06 01:19:40,057 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-06 01:19:40,057 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-06 01:19:40,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 01:19:40 BoogieIcfgContainer [2020-10-06 01:19:40,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-06 01:19:40,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-06 01:19:40,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-06 01:19:40,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-06 01:19:40,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.10 01:19:38" (1/3) ... [2020-10-06 01:19:40,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 01:19:40, skipping insertion in model container [2020-10-06 01:19:40,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.10 01:19:39" (2/3) ... [2020-10-06 01:19:40,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.10 01:19:40, skipping insertion in model container [2020-10-06 01:19:40,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.10 01:19:40" (3/3) ... [2020-10-06 01:19:40,068 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-10-06 01:19:40,085 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-06 01:19:40,085 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-06 01:19:40,097 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-06 01:19:40,098 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-06 01:19:40,126 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,127 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,127 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,127 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,128 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,128 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,128 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,128 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,129 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,129 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,129 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,129 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,130 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,130 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,130 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,130 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,131 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,131 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,131 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,131 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,132 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,132 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,132 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,136 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,136 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,136 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,136 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,137 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,137 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,137 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,137 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,137 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-06 01:19:40,159 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-06 01:19:40,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-06 01:19:40,181 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-06 01:19:40,181 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-06 01:19:40,181 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-06 01:19:40,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-06 01:19:40,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-06 01:19:40,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-06 01:19:40,182 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-06 01:19:40,198 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-10-06 01:19:40,200 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-06 01:19:40,246 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-06 01:19:40,247 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-06 01:19:40,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-06 01:19:40,254 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-10-06 01:19:40,279 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-10-06 01:19:40,279 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-06 01:19:40,280 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-06 01:19:40,282 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-10-06 01:19:40,283 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-06 01:19:42,101 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-06 01:19:42,283 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-06 01:19:43,005 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-10-06 01:19:43,294 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-06 01:19:43,303 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-10-06 01:19:43,303 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-10-06 01:19:43,306 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-10-06 01:19:43,315 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-10-06 01:19:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-06 01:19:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-06 01:19:43,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:43,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:43,326 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-10-06 01:19:43,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:43,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816996310] [2020-10-06 01:19:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:19:43,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816996310] [2020-10-06 01:19:43,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 01:19:43,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-06 01:19:43,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1757473599] [2020-10-06 01:19:43,595 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:43,598 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:43,613 INFO L258 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-06 01:19:43,614 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:43,643 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [154#(< ULTIMATE.start_main_~i~1 20)] [2020-10-06 01:19:43,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-06 01:19:43,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-06 01:19:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-06 01:19:43,662 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-10-06 01:19:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:43,706 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-10-06 01:19:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-06 01:19:43,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-06 01:19:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:43,719 INFO L225 Difference]: With dead ends: 58 [2020-10-06 01:19:43,719 INFO L226 Difference]: Without dead ends: 58 [2020-10-06 01:19:43,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-06 01:19:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-06 01:19:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-06 01:19:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-06 01:19:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-10-06 01:19:43,784 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 8 [2020-10-06 01:19:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:43,784 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-10-06 01:19:43,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-06 01:19:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-10-06 01:19:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-06 01:19:43,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:43,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:43,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-06 01:19:43,787 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1202349723, now seen corresponding path program 1 times [2020-10-06 01:19:43,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:43,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236099278] [2020-10-06 01:19:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-06 01:19:43,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236099278] [2020-10-06 01:19:43,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 01:19:43,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-06 01:19:43,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1297627314] [2020-10-06 01:19:43,845 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:43,847 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:43,854 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-10-06 01:19:43,854 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:43,922 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [332#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:43,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-06 01:19:43,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:43,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-06 01:19:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-06 01:19:43,924 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 4 states. [2020-10-06 01:19:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:43,950 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2020-10-06 01:19:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-06 01:19:43,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-06 01:19:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:43,954 INFO L225 Difference]: With dead ends: 103 [2020-10-06 01:19:43,954 INFO L226 Difference]: Without dead ends: 103 [2020-10-06 01:19:43,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-06 01:19:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-06 01:19:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-06 01:19:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-06 01:19:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 202 transitions. [2020-10-06 01:19:43,969 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 202 transitions. Word has length 14 [2020-10-06 01:19:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:43,969 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 202 transitions. [2020-10-06 01:19:43,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-06 01:19:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 202 transitions. [2020-10-06 01:19:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 01:19:43,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:43,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:43,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-06 01:19:43,972 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash -570543039, now seen corresponding path program 1 times [2020-10-06 01:19:43,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:43,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100116146] [2020-10-06 01:19:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-06 01:19:44,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100116146] [2020-10-06 01:19:44,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-06 01:19:44,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-06 01:19:44,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49726295] [2020-10-06 01:19:44,037 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:44,041 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:44,048 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2020-10-06 01:19:44,048 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:44,096 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 01:19:44,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-06 01:19:44,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:44,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-06 01:19:44,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-06 01:19:44,097 INFO L87 Difference]: Start difference. First operand 103 states and 202 transitions. Second operand 3 states. [2020-10-06 01:19:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:44,123 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-10-06 01:19:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-06 01:19:44,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-06 01:19:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:44,124 INFO L225 Difference]: With dead ends: 79 [2020-10-06 01:19:44,125 INFO L226 Difference]: Without dead ends: 79 [2020-10-06 01:19:44,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-06 01:19:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-06 01:19:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-06 01:19:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-06 01:19:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-10-06 01:19:44,143 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 22 [2020-10-06 01:19:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:44,144 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-10-06 01:19:44,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-06 01:19:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-10-06 01:19:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-06 01:19:44,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:44,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:44,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-06 01:19:44,148 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 2 times [2020-10-06 01:19:44,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:44,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740545880] [2020-10-06 01:19:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-06 01:19:44,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740545880] [2020-10-06 01:19:44,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40885276] [2020-10-06 01:19:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:44,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 01:19:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-06 01:19:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-06 01:19:44,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:44,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-06 01:19:44,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509349551] [2020-10-06 01:19:44,450 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:44,455 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:44,462 INFO L258 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-10-06 01:19:44,462 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:44,501 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [953#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:44,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-06 01:19:44,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-06 01:19:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:44,503 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 6 states. [2020-10-06 01:19:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:44,549 INFO L93 Difference]: Finished difference Result 110 states and 168 transitions. [2020-10-06 01:19:44,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-06 01:19:44,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-06 01:19:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:44,551 INFO L225 Difference]: With dead ends: 110 [2020-10-06 01:19:44,551 INFO L226 Difference]: Without dead ends: 110 [2020-10-06 01:19:44,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-06 01:19:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-06 01:19:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-06 01:19:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 154 transitions. [2020-10-06 01:19:44,561 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 154 transitions. Word has length 22 [2020-10-06 01:19:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:44,562 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 154 transitions. [2020-10-06 01:19:44,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-06 01:19:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 154 transitions. [2020-10-06 01:19:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-06 01:19:44,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:44,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:44,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:44,780 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2041399383, now seen corresponding path program 3 times [2020-10-06 01:19:44,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:44,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325433131] [2020-10-06 01:19:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:44,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325433131] [2020-10-06 01:19:44,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621120414] [2020-10-06 01:19:44,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:44,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-06 01:19:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-06 01:19:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-06 01:19:45,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:45,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-10-06 01:19:45,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [728708667] [2020-10-06 01:19:45,035 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:45,040 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:45,049 INFO L258 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-10-06 01:19:45,049 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:45,085 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1345#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:45,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-06 01:19:45,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-06 01:19:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-06 01:19:45,086 INFO L87 Difference]: Start difference. First operand 100 states and 154 transitions. Second operand 6 states. [2020-10-06 01:19:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:45,117 INFO L93 Difference]: Finished difference Result 160 states and 238 transitions. [2020-10-06 01:19:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-06 01:19:45,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-06 01:19:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:45,119 INFO L225 Difference]: With dead ends: 160 [2020-10-06 01:19:45,119 INFO L226 Difference]: Without dead ends: 160 [2020-10-06 01:19:45,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-06 01:19:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-06 01:19:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-06 01:19:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-06 01:19:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-10-06 01:19:45,132 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 25 [2020-10-06 01:19:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:45,133 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-10-06 01:19:45,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-06 01:19:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-10-06 01:19:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-06 01:19:45,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:45,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:45,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:45,368 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 4 times [2020-10-06 01:19:45,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:45,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191102671] [2020-10-06 01:19:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:45,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191102671] [2020-10-06 01:19:45,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793903700] [2020-10-06 01:19:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:45,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 01:19:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-06 01:19:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:45,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:45,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-06 01:19:45,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [97142436] [2020-10-06 01:19:45,578 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:45,585 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:45,602 INFO L258 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-10-06 01:19:45,602 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:45,642 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1930#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:45,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-06 01:19:45,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-06 01:19:45,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:45,643 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-10-06 01:19:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:45,684 INFO L93 Difference]: Finished difference Result 220 states and 322 transitions. [2020-10-06 01:19:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-06 01:19:45,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-06 01:19:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:45,687 INFO L225 Difference]: With dead ends: 220 [2020-10-06 01:19:45,687 INFO L226 Difference]: Without dead ends: 220 [2020-10-06 01:19:45,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-06 01:19:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-06 01:19:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-06 01:19:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2020-10-06 01:19:45,698 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 33 [2020-10-06 01:19:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:45,698 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2020-10-06 01:19:45,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-06 01:19:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2020-10-06 01:19:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-06 01:19:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:45,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:45,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:45,916 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:45,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1068728479, now seen corresponding path program 5 times [2020-10-06 01:19:45,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:45,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138023820] [2020-10-06 01:19:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:46,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138023820] [2020-10-06 01:19:46,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37340981] [2020-10-06 01:19:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:46,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-06 01:19:46,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-06 01:19:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:46,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:46,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-06 01:19:46,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [918050655] [2020-10-06 01:19:46,134 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:46,144 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:46,167 INFO L258 McrAutomatonBuilder]: Finished intersection with 53 states and 63 transitions. [2020-10-06 01:19:46,168 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:46,203 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2721#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:46,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-06 01:19:46,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-06 01:19:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-06 01:19:46,205 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 10 states. [2020-10-06 01:19:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:46,253 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2020-10-06 01:19:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-06 01:19:46,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-06 01:19:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:46,272 INFO L225 Difference]: With dead ends: 280 [2020-10-06 01:19:46,273 INFO L226 Difference]: Without dead ends: 280 [2020-10-06 01:19:46,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-06 01:19:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-06 01:19:46,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-06 01:19:46,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-06 01:19:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2020-10-06 01:19:46,283 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 41 [2020-10-06 01:19:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:46,284 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2020-10-06 01:19:46,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-06 01:19:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2020-10-06 01:19:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-06 01:19:46,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:46,286 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:46,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:46,500 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:46,500 INFO L82 PathProgramCache]: Analyzing trace with hash 2088433981, now seen corresponding path program 6 times [2020-10-06 01:19:46,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:46,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025118669] [2020-10-06 01:19:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:46,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025118669] [2020-10-06 01:19:46,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686169082] [2020-10-06 01:19:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:46,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-06 01:19:46,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-06 01:19:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-06 01:19:46,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:46,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-10-06 01:19:46,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1163890108] [2020-10-06 01:19:46,821 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:46,836 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:46,869 INFO L258 McrAutomatonBuilder]: Finished intersection with 61 states and 71 transitions. [2020-10-06 01:19:46,870 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:46,945 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3721#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:46,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 01:19:46,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 01:19:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-06 01:19:46,947 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 12 states. [2020-10-06 01:19:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:47,016 INFO L93 Difference]: Finished difference Result 340 states and 490 transitions. [2020-10-06 01:19:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-06 01:19:47,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-06 01:19:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:47,019 INFO L225 Difference]: With dead ends: 340 [2020-10-06 01:19:47,019 INFO L226 Difference]: Without dead ends: 340 [2020-10-06 01:19:47,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-06 01:19:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-06 01:19:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-06 01:19:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-06 01:19:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 490 transitions. [2020-10-06 01:19:47,032 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 490 transitions. Word has length 49 [2020-10-06 01:19:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:47,032 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 490 transitions. [2020-10-06 01:19:47,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 01:19:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 490 transitions. [2020-10-06 01:19:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-06 01:19:47,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:47,037 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:47,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:47,251 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:47,252 INFO L82 PathProgramCache]: Analyzing trace with hash -303048935, now seen corresponding path program 7 times [2020-10-06 01:19:47,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:47,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307134663] [2020-10-06 01:19:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:47,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307134663] [2020-10-06 01:19:47,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353650527] [2020-10-06 01:19:47,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 01:19:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:47,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:47,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-06 01:19:47,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [759742707] [2020-10-06 01:19:47,653 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:47,670 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:47,710 INFO L258 McrAutomatonBuilder]: Finished intersection with 69 states and 79 transitions. [2020-10-06 01:19:47,711 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:47,750 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4924#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:47,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 01:19:47,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 01:19:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-06 01:19:47,752 INFO L87 Difference]: Start difference. First operand 340 states and 490 transitions. Second operand 14 states. [2020-10-06 01:19:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:47,817 INFO L93 Difference]: Finished difference Result 400 states and 574 transitions. [2020-10-06 01:19:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-06 01:19:47,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-06 01:19:47,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:47,820 INFO L225 Difference]: With dead ends: 400 [2020-10-06 01:19:47,820 INFO L226 Difference]: Without dead ends: 400 [2020-10-06 01:19:47,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-06 01:19:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-06 01:19:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2020-10-06 01:19:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-06 01:19:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 574 transitions. [2020-10-06 01:19:47,832 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 574 transitions. Word has length 57 [2020-10-06 01:19:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:47,832 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 574 transitions. [2020-10-06 01:19:47,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 01:19:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 574 transitions. [2020-10-06 01:19:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-06 01:19:47,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:47,834 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:48,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:48,050 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash 705108213, now seen corresponding path program 8 times [2020-10-06 01:19:48,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:48,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363761147] [2020-10-06 01:19:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:48,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363761147] [2020-10-06 01:19:48,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479368322] [2020-10-06 01:19:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:48,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 01:19:48,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:48,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 01:19:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:48,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:48,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-06 01:19:48,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [299060327] [2020-10-06 01:19:48,479 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:48,502 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:48,559 INFO L258 McrAutomatonBuilder]: Finished intersection with 77 states and 87 transitions. [2020-10-06 01:19:48,560 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:48,597 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6333#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:48,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 01:19:48,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 01:19:48,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-06 01:19:48,598 INFO L87 Difference]: Start difference. First operand 400 states and 574 transitions. Second operand 16 states. [2020-10-06 01:19:48,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:48,679 INFO L93 Difference]: Finished difference Result 460 states and 658 transitions. [2020-10-06 01:19:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-06 01:19:48,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-06 01:19:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:48,682 INFO L225 Difference]: With dead ends: 460 [2020-10-06 01:19:48,683 INFO L226 Difference]: Without dead ends: 460 [2020-10-06 01:19:48,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-06 01:19:48,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-06 01:19:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2020-10-06 01:19:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-10-06 01:19:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 658 transitions. [2020-10-06 01:19:48,693 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 658 transitions. Word has length 65 [2020-10-06 01:19:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:48,694 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 658 transitions. [2020-10-06 01:19:48,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 01:19:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 658 transitions. [2020-10-06 01:19:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-06 01:19:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:48,696 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:48,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-06 01:19:48,910 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 706526929, now seen corresponding path program 9 times [2020-10-06 01:19:48,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:48,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428467635] [2020-10-06 01:19:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:49,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428467635] [2020-10-06 01:19:49,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354622857] [2020-10-06 01:19:49,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:49,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-06 01:19:49,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-06 01:19:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-06 01:19:49,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:49,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-10-06 01:19:49,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828887874] [2020-10-06 01:19:49,301 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:49,328 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:49,388 INFO L258 McrAutomatonBuilder]: Finished intersection with 85 states and 95 transitions. [2020-10-06 01:19:49,388 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:49,465 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7951#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:49,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 01:19:49,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 01:19:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-06 01:19:49,467 INFO L87 Difference]: Start difference. First operand 460 states and 658 transitions. Second operand 18 states. [2020-10-06 01:19:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:49,564 INFO L93 Difference]: Finished difference Result 520 states and 742 transitions. [2020-10-06 01:19:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-06 01:19:49,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-06 01:19:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:49,569 INFO L225 Difference]: With dead ends: 520 [2020-10-06 01:19:49,569 INFO L226 Difference]: Without dead ends: 520 [2020-10-06 01:19:49,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-06 01:19:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-10-06 01:19:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2020-10-06 01:19:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-10-06 01:19:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 742 transitions. [2020-10-06 01:19:49,579 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 742 transitions. Word has length 73 [2020-10-06 01:19:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:49,580 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 742 transitions. [2020-10-06 01:19:49,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 01:19:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 742 transitions. [2020-10-06 01:19:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-06 01:19:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:49,582 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:49,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-06 01:19:49,797 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -879966035, now seen corresponding path program 10 times [2020-10-06 01:19:49,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:49,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996617163] [2020-10-06 01:19:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:50,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996617163] [2020-10-06 01:19:50,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697045158] [2020-10-06 01:19:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:50,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 01:19:50,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 01:19:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:50,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:50,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-06 01:19:50,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1778040774] [2020-10-06 01:19:50,379 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:50,412 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:50,484 INFO L258 McrAutomatonBuilder]: Finished intersection with 93 states and 103 transitions. [2020-10-06 01:19:50,484 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:50,614 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9772#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:50,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 01:19:50,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 01:19:50,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-06 01:19:50,616 INFO L87 Difference]: Start difference. First operand 520 states and 742 transitions. Second operand 20 states. [2020-10-06 01:19:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:50,712 INFO L93 Difference]: Finished difference Result 580 states and 826 transitions. [2020-10-06 01:19:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-06 01:19:50,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-06 01:19:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:50,723 INFO L225 Difference]: With dead ends: 580 [2020-10-06 01:19:50,724 INFO L226 Difference]: Without dead ends: 580 [2020-10-06 01:19:50,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-06 01:19:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2020-10-06 01:19:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2020-10-06 01:19:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-10-06 01:19:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 826 transitions. [2020-10-06 01:19:50,752 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 826 transitions. Word has length 81 [2020-10-06 01:19:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:50,753 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 826 transitions. [2020-10-06 01:19:50,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 01:19:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 826 transitions. [2020-10-06 01:19:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-06 01:19:50,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:50,759 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:50,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:50,975 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -810338679, now seen corresponding path program 11 times [2020-10-06 01:19:50,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:50,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957742340] [2020-10-06 01:19:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:51,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957742340] [2020-10-06 01:19:51,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631139020] [2020-10-06 01:19:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:51,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-10-06 01:19:51,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:51,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 01:19:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-06 01:19:51,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:51,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-06 01:19:51,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2102111567] [2020-10-06 01:19:51,447 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:51,482 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:51,980 INFO L258 McrAutomatonBuilder]: Finished intersection with 101 states and 111 transitions. [2020-10-06 01:19:51,980 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:52,035 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11799#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-10-06 01:19:52,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 01:19:52,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:52,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 01:19:52,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-06 01:19:52,036 INFO L87 Difference]: Start difference. First operand 580 states and 826 transitions. Second operand 22 states. [2020-10-06 01:19:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:52,163 INFO L93 Difference]: Finished difference Result 640 states and 910 transitions. [2020-10-06 01:19:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-06 01:19:52,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-06 01:19:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:52,167 INFO L225 Difference]: With dead ends: 640 [2020-10-06 01:19:52,167 INFO L226 Difference]: Without dead ends: 640 [2020-10-06 01:19:52,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-06 01:19:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2020-10-06 01:19:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2020-10-06 01:19:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2020-10-06 01:19:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 910 transitions. [2020-10-06 01:19:52,180 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 910 transitions. Word has length 89 [2020-10-06 01:19:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:52,180 INFO L479 AbstractCegarLoop]: Abstraction has 640 states and 910 transitions. [2020-10-06 01:19:52,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 01:19:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 910 transitions. [2020-10-06 01:19:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-06 01:19:52,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:52,183 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:52,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:52,397 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash -605288347, now seen corresponding path program 12 times [2020-10-06 01:19:52,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:52,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746866739] [2020-10-06 01:19:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:52,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746866739] [2020-10-06 01:19:52,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453620562] [2020-10-06 01:19:52,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:52,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-06 01:19:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-06 01:19:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:52,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:52,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-06 01:19:52,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1646324078] [2020-10-06 01:19:52,624 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:52,672 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:52,887 INFO L258 McrAutomatonBuilder]: Finished intersection with 109 states and 119 transitions. [2020-10-06 01:19:52,887 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:52,927 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14015#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:52,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-06 01:19:52,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-06 01:19:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-06 01:19:52,929 INFO L87 Difference]: Start difference. First operand 640 states and 910 transitions. Second operand 7 states. [2020-10-06 01:19:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:52,966 INFO L93 Difference]: Finished difference Result 815 states and 1116 transitions. [2020-10-06 01:19:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-06 01:19:52,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-06 01:19:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:52,970 INFO L225 Difference]: With dead ends: 815 [2020-10-06 01:19:52,971 INFO L226 Difference]: Without dead ends: 815 [2020-10-06 01:19:52,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-06 01:19:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2020-10-06 01:19:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 769. [2020-10-06 01:19:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-06 01:19:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1066 transitions. [2020-10-06 01:19:52,986 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1066 transitions. Word has length 97 [2020-10-06 01:19:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:52,986 INFO L479 AbstractCegarLoop]: Abstraction has 769 states and 1066 transitions. [2020-10-06 01:19:52,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-06 01:19:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1066 transitions. [2020-10-06 01:19:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-06 01:19:52,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:52,989 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:53,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-06 01:19:53,202 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1449388415, now seen corresponding path program 13 times [2020-10-06 01:19:53,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:53,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924216806] [2020-10-06 01:19:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924216806] [2020-10-06 01:19:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231743143] [2020-10-06 01:19:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-06 01:19:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:53,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:53,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-06 01:19:53,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [663490386] [2020-10-06 01:19:53,518 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:53,550 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:53,738 INFO L258 McrAutomatonBuilder]: Finished intersection with 115 states and 128 transitions. [2020-10-06 01:19:53,738 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:53,810 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16674#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:53,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-06 01:19:53,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-06 01:19:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:53,812 INFO L87 Difference]: Start difference. First operand 769 states and 1066 transitions. Second operand 8 states. [2020-10-06 01:19:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:53,879 INFO L93 Difference]: Finished difference Result 944 states and 1272 transitions. [2020-10-06 01:19:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-06 01:19:53,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-06 01:19:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:53,886 INFO L225 Difference]: With dead ends: 944 [2020-10-06 01:19:53,886 INFO L226 Difference]: Without dead ends: 944 [2020-10-06 01:19:54,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-06 01:19:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-10-06 01:19:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 898. [2020-10-06 01:19:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-06 01:19:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1222 transitions. [2020-10-06 01:19:54,067 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1222 transitions. Word has length 100 [2020-10-06 01:19:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:54,068 INFO L479 AbstractCegarLoop]: Abstraction has 898 states and 1222 transitions. [2020-10-06 01:19:54,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-06 01:19:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1222 transitions. [2020-10-06 01:19:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-06 01:19:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:54,072 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:54,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-06 01:19:54,287 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash 450902565, now seen corresponding path program 14 times [2020-10-06 01:19:54,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:54,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259411248] [2020-10-06 01:19:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:54,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259411248] [2020-10-06 01:19:54,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530606263] [2020-10-06 01:19:54,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:54,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 01:19:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-06 01:19:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:54,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:54,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-06 01:19:54,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994118087] [2020-10-06 01:19:54,691 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:54,740 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:55,369 INFO L258 McrAutomatonBuilder]: Finished intersection with 121 states and 137 transitions. [2020-10-06 01:19:55,370 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:55,449 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19730#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:55,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-06 01:19:55,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-06 01:19:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-06 01:19:55,450 INFO L87 Difference]: Start difference. First operand 898 states and 1222 transitions. Second operand 9 states. [2020-10-06 01:19:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:55,509 INFO L93 Difference]: Finished difference Result 1073 states and 1428 transitions. [2020-10-06 01:19:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-06 01:19:55,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2020-10-06 01:19:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:55,514 INFO L225 Difference]: With dead ends: 1073 [2020-10-06 01:19:55,515 INFO L226 Difference]: Without dead ends: 1073 [2020-10-06 01:19:55,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-06 01:19:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-10-06 01:19:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1027. [2020-10-06 01:19:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-10-06 01:19:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1378 transitions. [2020-10-06 01:19:55,533 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1378 transitions. Word has length 103 [2020-10-06 01:19:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:55,534 INFO L479 AbstractCegarLoop]: Abstraction has 1027 states and 1378 transitions. [2020-10-06 01:19:55,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-06 01:19:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1378 transitions. [2020-10-06 01:19:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-06 01:19:55,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:55,537 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:55,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-06 01:19:55,751 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1502437311, now seen corresponding path program 15 times [2020-10-06 01:19:55,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:55,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353866309] [2020-10-06 01:19:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:55,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353866309] [2020-10-06 01:19:55,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957468218] [2020-10-06 01:19:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:55,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-06 01:19:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-06 01:19:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:56,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:56,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-06 01:19:56,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1942545886] [2020-10-06 01:19:56,018 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:56,060 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:56,304 INFO L258 McrAutomatonBuilder]: Finished intersection with 127 states and 146 transitions. [2020-10-06 01:19:56,304 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:56,402 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:56,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-06 01:19:56,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-06 01:19:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-06 01:19:56,403 INFO L87 Difference]: Start difference. First operand 1027 states and 1378 transitions. Second operand 10 states. [2020-10-06 01:19:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:56,469 INFO L93 Difference]: Finished difference Result 1202 states and 1584 transitions. [2020-10-06 01:19:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-06 01:19:56,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-10-06 01:19:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:56,475 INFO L225 Difference]: With dead ends: 1202 [2020-10-06 01:19:56,475 INFO L226 Difference]: Without dead ends: 1202 [2020-10-06 01:19:56,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-06 01:19:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-10-06 01:19:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1156. [2020-10-06 01:19:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-10-06 01:19:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2020-10-06 01:19:56,498 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 106 [2020-10-06 01:19:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:56,498 INFO L479 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2020-10-06 01:19:56,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-06 01:19:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2020-10-06 01:19:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-06 01:19:56,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:56,504 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:56,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:56,719 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 282598373, now seen corresponding path program 16 times [2020-10-06 01:19:56,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:56,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300771280] [2020-10-06 01:19:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:56,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300771280] [2020-10-06 01:19:56,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441959925] [2020-10-06 01:19:56,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:19:57,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 01:19:57,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-06 01:19:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:57,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:57,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-06 01:19:57,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [36929614] [2020-10-06 01:19:57,364 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:57,404 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:57,758 INFO L258 McrAutomatonBuilder]: Finished intersection with 133 states and 155 transitions. [2020-10-06 01:19:57,759 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:57,868 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27033#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:57,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-06 01:19:57,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-06 01:19:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-06 01:19:57,870 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 11 states. [2020-10-06 01:19:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:57,931 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2020-10-06 01:19:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-06 01:19:57,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2020-10-06 01:19:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:57,937 INFO L225 Difference]: With dead ends: 1331 [2020-10-06 01:19:57,937 INFO L226 Difference]: Without dead ends: 1331 [2020-10-06 01:19:57,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-06 01:19:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-10-06 01:19:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2020-10-06 01:19:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-10-06 01:19:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-10-06 01:19:57,961 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2020-10-06 01:19:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:57,961 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-10-06 01:19:57,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-06 01:19:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-10-06 01:19:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-06 01:19:57,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:57,965 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:58,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-06 01:19:58,181 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 17 times [2020-10-06 01:19:58,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:58,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254202021] [2020-10-06 01:19:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:58,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254202021] [2020-10-06 01:19:58,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582925324] [2020-10-06 01:19:58,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:58,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-06 01:19:58,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-06 01:19:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:19:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:58,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:19:58,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-06 01:19:58,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1252211071] [2020-10-06 01:19:58,667 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:19:58,711 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:19:59,018 INFO L258 McrAutomatonBuilder]: Finished intersection with 139 states and 164 transitions. [2020-10-06 01:19:59,018 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:19:59,172 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31280#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:19:59,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-06 01:19:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:19:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-06 01:19:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-06 01:19:59,174 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-10-06 01:19:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:19:59,227 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-10-06 01:19:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-06 01:19:59,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-10-06 01:19:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:19:59,236 INFO L225 Difference]: With dead ends: 1460 [2020-10-06 01:19:59,236 INFO L226 Difference]: Without dead ends: 1460 [2020-10-06 01:19:59,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-06 01:19:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-10-06 01:19:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-10-06 01:19:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-10-06 01:19:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-10-06 01:19:59,264 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-10-06 01:19:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:19:59,264 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-10-06 01:19:59,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-06 01:19:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-10-06 01:19:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-06 01:19:59,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:19:59,268 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:19:59,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:59,482 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:19:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:19:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 18 times [2020-10-06 01:19:59,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:19:59,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609784769] [2020-10-06 01:19:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:19:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:19:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:19:59,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609784769] [2020-10-06 01:19:59,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373572513] [2020-10-06 01:19:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:19:59,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-06 01:19:59,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:19:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-06 01:19:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-06 01:20:00,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18591183] [2020-10-06 01:20:00,024 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:00,089 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:00,394 INFO L258 McrAutomatonBuilder]: Finished intersection with 145 states and 173 transitions. [2020-10-06 01:20:00,394 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:00,547 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35924#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:00,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-06 01:20:00,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-06 01:20:00,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-06 01:20:00,548 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-10-06 01:20:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:00,648 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-10-06 01:20:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-06 01:20:00,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-10-06 01:20:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:00,655 INFO L225 Difference]: With dead ends: 1589 [2020-10-06 01:20:00,655 INFO L226 Difference]: Without dead ends: 1589 [2020-10-06 01:20:00,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-06 01:20:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-06 01:20:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-10-06 01:20:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-10-06 01:20:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-10-06 01:20:00,683 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-10-06 01:20:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:00,684 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-10-06 01:20:00,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-06 01:20:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-10-06 01:20:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-06 01:20:00,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:00,688 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:00,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:20:00,903 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:00,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:00,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 19 times [2020-10-06 01:20:00,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:00,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050276635] [2020-10-06 01:20:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050276635] [2020-10-06 01:20:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544818227] [2020-10-06 01:20:01,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-06 01:20:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:01,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:01,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-06 01:20:01,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409234330] [2020-10-06 01:20:01,333 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:01,432 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:01,807 INFO L258 McrAutomatonBuilder]: Finished intersection with 151 states and 182 transitions. [2020-10-06 01:20:01,807 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:02,026 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40965#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:02,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-06 01:20:02,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:02,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-06 01:20:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-06 01:20:02,027 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-10-06 01:20:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:02,125 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-10-06 01:20:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-06 01:20:02,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-10-06 01:20:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:02,132 INFO L225 Difference]: With dead ends: 1718 [2020-10-06 01:20:02,133 INFO L226 Difference]: Without dead ends: 1718 [2020-10-06 01:20:02,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-06 01:20:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-06 01:20:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-10-06 01:20:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-10-06 01:20:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-10-06 01:20:02,167 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-10-06 01:20:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:02,168 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-10-06 01:20:02,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-06 01:20:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-10-06 01:20:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-06 01:20:02,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:02,173 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:02,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-06 01:20:02,389 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:02,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 20 times [2020-10-06 01:20:02,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:02,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519351771] [2020-10-06 01:20:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:02,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519351771] [2020-10-06 01:20:02,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651760919] [2020-10-06 01:20:02,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:02,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 01:20:02,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:02,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-06 01:20:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:02,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:02,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-06 01:20:02,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [185013005] [2020-10-06 01:20:02,795 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:02,844 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:03,069 INFO L258 McrAutomatonBuilder]: Finished intersection with 157 states and 191 transitions. [2020-10-06 01:20:03,070 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:03,282 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46403#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:03,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-06 01:20:03,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-06 01:20:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-06 01:20:03,283 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-10-06 01:20:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:03,378 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-10-06 01:20:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-06 01:20:03,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-06 01:20:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:03,385 INFO L225 Difference]: With dead ends: 1847 [2020-10-06 01:20:03,385 INFO L226 Difference]: Without dead ends: 1847 [2020-10-06 01:20:03,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-06 01:20:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-10-06 01:20:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-10-06 01:20:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-10-06 01:20:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-10-06 01:20:03,414 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-10-06 01:20:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:03,415 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-10-06 01:20:03,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-06 01:20:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-10-06 01:20:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-06 01:20:03,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:03,419 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:03,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:20:03,634 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:03,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:03,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 21 times [2020-10-06 01:20:03,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:03,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840226676] [2020-10-06 01:20:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:03,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840226676] [2020-10-06 01:20:03,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126951996] [2020-10-06 01:20:03,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:04,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-06 01:20:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-06 01:20:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:04,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:04,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-06 01:20:04,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2121712723] [2020-10-06 01:20:04,356 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:04,459 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:04,847 INFO L258 McrAutomatonBuilder]: Finished intersection with 163 states and 200 transitions. [2020-10-06 01:20:04,848 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:05,139 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52238#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:05,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-06 01:20:05,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-06 01:20:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-06 01:20:05,141 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-10-06 01:20:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:05,253 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-10-06 01:20:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-06 01:20:05,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-10-06 01:20:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:05,262 INFO L225 Difference]: With dead ends: 1976 [2020-10-06 01:20:05,262 INFO L226 Difference]: Without dead ends: 1976 [2020-10-06 01:20:05,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 150 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-06 01:20:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-06 01:20:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-10-06 01:20:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-10-06 01:20:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-10-06 01:20:05,315 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-10-06 01:20:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:05,316 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-10-06 01:20:05,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-06 01:20:05,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-10-06 01:20:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-06 01:20:05,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:05,321 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:05,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-06 01:20:05,537 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 22 times [2020-10-06 01:20:05,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:05,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401381203] [2020-10-06 01:20:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:05,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401381203] [2020-10-06 01:20:05,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665054842] [2020-10-06 01:20:05,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:07,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 01:20:07,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-06 01:20:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:07,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:07,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-06 01:20:07,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [560554092] [2020-10-06 01:20:07,802 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:07,856 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:08,319 INFO L258 McrAutomatonBuilder]: Finished intersection with 169 states and 209 transitions. [2020-10-06 01:20:08,319 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:09,314 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-10-06 01:20:09,319 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58470#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:09,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-06 01:20:09,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-06 01:20:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-06 01:20:09,320 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-10-06 01:20:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:09,428 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-10-06 01:20:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-06 01:20:09,429 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-10-06 01:20:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:09,437 INFO L225 Difference]: With dead ends: 2105 [2020-10-06 01:20:09,438 INFO L226 Difference]: Without dead ends: 2105 [2020-10-06 01:20:09,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-06 01:20:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-10-06 01:20:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-10-06 01:20:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-10-06 01:20:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-10-06 01:20:09,473 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-10-06 01:20:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:09,474 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-10-06 01:20:09,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-06 01:20:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-10-06 01:20:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-06 01:20:09,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:09,479 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:09,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-06 01:20:09,694 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:09,695 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 23 times [2020-10-06 01:20:09,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:09,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201804237] [2020-10-06 01:20:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:09,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201804237] [2020-10-06 01:20:09,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568249575] [2020-10-06 01:20:09,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:10,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-06 01:20:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-06 01:20:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:10,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:10,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-06 01:20:10,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2002304458] [2020-10-06 01:20:10,386 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:10,451 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:11,089 INFO L258 McrAutomatonBuilder]: Finished intersection with 175 states and 218 transitions. [2020-10-06 01:20:11,090 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:11,364 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65099#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:11,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-06 01:20:11,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-06 01:20:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-06 01:20:11,365 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-10-06 01:20:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:11,474 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-10-06 01:20:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-06 01:20:11,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-10-06 01:20:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:11,483 INFO L225 Difference]: With dead ends: 2234 [2020-10-06 01:20:11,483 INFO L226 Difference]: Without dead ends: 2234 [2020-10-06 01:20:11,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 160 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-06 01:20:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-10-06 01:20:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-10-06 01:20:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-10-06 01:20:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-10-06 01:20:11,517 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-10-06 01:20:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:11,518 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-10-06 01:20:11,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-06 01:20:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-10-06 01:20:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-06 01:20:11,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:11,523 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:11,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:20:11,737 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 24 times [2020-10-06 01:20:11,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:11,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069526589] [2020-10-06 01:20:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:12,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069526589] [2020-10-06 01:20:12,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051032411] [2020-10-06 01:20:12,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:12,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-06 01:20:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-06 01:20:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:12,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:12,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-06 01:20:12,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [541216989] [2020-10-06 01:20:12,729 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:12,782 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:14,104 INFO L258 McrAutomatonBuilder]: Finished intersection with 181 states and 227 transitions. [2020-10-06 01:20:14,105 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:14,454 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72125#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:14,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-06 01:20:14,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-06 01:20:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-06 01:20:14,455 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-10-06 01:20:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:14,568 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-10-06 01:20:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-06 01:20:14,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-10-06 01:20:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:14,578 INFO L225 Difference]: With dead ends: 2363 [2020-10-06 01:20:14,578 INFO L226 Difference]: Without dead ends: 2363 [2020-10-06 01:20:14,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 165 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-06 01:20:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-06 01:20:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-10-06 01:20:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-10-06 01:20:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-10-06 01:20:14,614 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-10-06 01:20:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:14,614 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-10-06 01:20:14,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-06 01:20:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-10-06 01:20:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-06 01:20:14,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:14,622 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:14,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-06 01:20:14,837 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 25 times [2020-10-06 01:20:14,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:14,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923578887] [2020-10-06 01:20:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:15,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923578887] [2020-10-06 01:20:15,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393434530] [2020-10-06 01:20:15,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-06 01:20:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:15,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:15,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-06 01:20:15,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [691781242] [2020-10-06 01:20:15,254 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:15,311 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:15,852 INFO L258 McrAutomatonBuilder]: Finished intersection with 187 states and 236 transitions. [2020-10-06 01:20:15,852 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:16,167 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79548#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:16,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-06 01:20:16,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:16,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-06 01:20:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-06 01:20:16,169 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-10-06 01:20:16,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:16,257 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-10-06 01:20:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-06 01:20:16,258 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-10-06 01:20:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:16,280 INFO L225 Difference]: With dead ends: 2492 [2020-10-06 01:20:16,280 INFO L226 Difference]: Without dead ends: 2492 [2020-10-06 01:20:16,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 170 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-06 01:20:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-10-06 01:20:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-10-06 01:20:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-10-06 01:20:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-10-06 01:20:16,313 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-10-06 01:20:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:16,314 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-10-06 01:20:16,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-06 01:20:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-10-06 01:20:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-06 01:20:16,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:16,319 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:16,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:20:16,534 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 26 times [2020-10-06 01:20:16,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:16,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334824653] [2020-10-06 01:20:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:16,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334824653] [2020-10-06 01:20:16,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495725107] [2020-10-06 01:20:16,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:16,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-06 01:20:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:16,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-06 01:20:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:16,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:16,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-06 01:20:16,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [902761589] [2020-10-06 01:20:16,990 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:17,051 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:17,554 INFO L258 McrAutomatonBuilder]: Finished intersection with 193 states and 245 transitions. [2020-10-06 01:20:17,554 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:17,893 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87368#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:17,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-06 01:20:17,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-06 01:20:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-06 01:20:17,894 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-10-06 01:20:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:18,012 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-10-06 01:20:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-06 01:20:18,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-10-06 01:20:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:18,017 INFO L225 Difference]: With dead ends: 2621 [2020-10-06 01:20:18,017 INFO L226 Difference]: Without dead ends: 2621 [2020-10-06 01:20:18,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-06 01:20:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-10-06 01:20:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-10-06 01:20:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-10-06 01:20:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-10-06 01:20:18,054 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-10-06 01:20:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:18,054 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-10-06 01:20:18,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-06 01:20:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-10-06 01:20:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-06 01:20:18,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:18,063 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:18,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-06 01:20:18,276 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 27 times [2020-10-06 01:20:18,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:18,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544230377] [2020-10-06 01:20:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:18,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544230377] [2020-10-06 01:20:18,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957965575] [2020-10-06 01:20:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:19,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-10-06 01:20:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-06 01:20:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:19,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:19,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-06 01:20:19,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1532526532] [2020-10-06 01:20:19,084 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:19,129 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:19,681 INFO L258 McrAutomatonBuilder]: Finished intersection with 199 states and 254 transitions. [2020-10-06 01:20:19,681 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:20,051 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95585#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:20,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-06 01:20:20,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-06 01:20:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-06 01:20:20,053 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-10-06 01:20:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:20,177 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-10-06 01:20:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-06 01:20:20,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-10-06 01:20:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:20,181 INFO L225 Difference]: With dead ends: 2750 [2020-10-06 01:20:20,182 INFO L226 Difference]: Without dead ends: 2750 [2020-10-06 01:20:20,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 17 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-06 01:20:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-10-06 01:20:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-10-06 01:20:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-10-06 01:20:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-10-06 01:20:20,214 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-10-06 01:20:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:20,214 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-10-06 01:20:20,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-06 01:20:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-10-06 01:20:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-06 01:20:20,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:20,220 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:20,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-06 01:20:20,436 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 28 times [2020-10-06 01:20:20,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:20,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612538555] [2020-10-06 01:20:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:20,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612538555] [2020-10-06 01:20:20,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17052137] [2020-10-06 01:20:20,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:22,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-06 01:20:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-06 01:20:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-06 01:20:22,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:22,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-06 01:20:22,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1486857150] [2020-10-06 01:20:22,905 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:22,968 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:23,571 INFO L258 McrAutomatonBuilder]: Finished intersection with 205 states and 263 transitions. [2020-10-06 01:20:23,572 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:24,057 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104199#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-10-06 01:20:24,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-06 01:20:24,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-06 01:20:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-06 01:20:24,059 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-10-06 01:20:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:20:24,255 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-10-06 01:20:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-06 01:20:24,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-10-06 01:20:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:20:24,264 INFO L225 Difference]: With dead ends: 2833 [2020-10-06 01:20:24,264 INFO L226 Difference]: Without dead ends: 2833 [2020-10-06 01:20:24,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 18 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-06 01:20:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-10-06 01:20:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-10-06 01:20:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-10-06 01:20:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-10-06 01:20:24,329 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-10-06 01:20:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:20:24,330 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-10-06 01:20:24,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-06 01:20:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-10-06 01:20:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-06 01:20:24,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:20:24,340 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:20:24,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:20:24,554 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:20:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:20:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 29 times [2020-10-06 01:20:24,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:20:24,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824439175] [2020-10-06 01:20:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:20:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:20:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:20:27,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824439175] [2020-10-06 01:20:27,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419083172] [2020-10-06 01:20:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:20:27,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-06 01:20:27,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:20:27,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-06 01:20:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:20:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:20:27,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:20:27,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-06 01:20:27,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [719079868] [2020-10-06 01:20:27,915 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:20:28,167 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:20:28,856 INFO L258 McrAutomatonBuilder]: Finished intersection with 211 states and 272 transitions. [2020-10-06 01:20:28,857 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:20:29,104 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 01:20:29,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-06 01:20:29,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:20:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-06 01:20:29,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-06 01:20:29,106 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-10-06 01:21:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:21:47,535 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-10-06 01:21:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-10-06 01:21:47,535 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-06 01:21:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:21:47,596 INFO L225 Difference]: With dead ends: 32926 [2020-10-06 01:21:47,596 INFO L226 Difference]: Without dead ends: 32924 [2020-10-06 01:21:47,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-10-06 01:21:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-10-06 01:21:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-10-06 01:21:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-10-06 01:21:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-10-06 01:21:47,852 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-10-06 01:21:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:21:47,853 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-10-06 01:21:47,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-06 01:21:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-10-06 01:21:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-06 01:21:47,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:21:47,858 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:21:48,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:21:48,073 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:21:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:21:48,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 30 times [2020-10-06 01:21:48,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:21:48,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158690668] [2020-10-06 01:21:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:21:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:21:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:21:51,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158690668] [2020-10-06 01:21:51,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927402675] [2020-10-06 01:21:51,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:21:51,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-10-06 01:21:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-06 01:21:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-06 01:21:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:21:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:21:51,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:21:51,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-06 01:21:51,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1278004022] [2020-10-06 01:21:51,889 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:21:51,931 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:21:52,383 INFO L258 McrAutomatonBuilder]: Finished intersection with 208 states and 266 transitions. [2020-10-06 01:21:52,384 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:21:52,619 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 01:21:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-06 01:21:52,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:21:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-06 01:21:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-06 01:21:52,621 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2020-10-06 01:22:34,663 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-06 01:23:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-06 01:23:12,919 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2020-10-06 01:23:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2020-10-06 01:23:12,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-10-06 01:23:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-06 01:23:12,952 INFO L225 Difference]: With dead ends: 30945 [2020-10-06 01:23:12,953 INFO L226 Difference]: Without dead ends: 30943 [2020-10-06 01:23:12,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2020-10-06 01:23:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2020-10-06 01:23:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2020-10-06 01:23:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2020-10-06 01:23:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2020-10-06 01:23:13,128 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2020-10-06 01:23:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 01:23:13,128 INFO L479 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2020-10-06 01:23:13,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-06 01:23:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2020-10-06 01:23:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-06 01:23:13,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 01:23:13,135 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 01:23:13,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-06 01:23:13,349 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 01:23:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 01:23:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1092472257, now seen corresponding path program 31 times [2020-10-06 01:23:13,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 01:23:13,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923646288] [2020-10-06 01:23:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 01:23:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:23:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:23:16,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923646288] [2020-10-06 01:23:16,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041072255] [2020-10-06 01:23:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-06 01:23:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 01:23:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-10-06 01:23:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 01:23:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-06 01:23:16,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 01:23:17,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-10-06 01:23:17,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [165143368] [2020-10-06 01:23:17,002 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 01:23:17,076 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 01:23:17,566 INFO L258 McrAutomatonBuilder]: Finished intersection with 205 states and 260 transitions. [2020-10-06 01:23:17,566 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 01:23:17,809 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-06 01:23:17,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-06 01:23:17,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 01:23:17,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-06 01:23:17,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-10-06 01:23:17,810 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. Received shutdown request... [2020-10-06 01:23:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-06 01:23:29,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 01:23:29,965 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-06 01:23:29,971 WARN L228 ceAbstractionStarter]: Timeout [2020-10-06 01:23:29,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 01:23:29 BasicIcfg [2020-10-06 01:23:29,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-06 01:23:29,973 INFO L168 Benchmark]: Toolchain (without parser) took 231646.76 ms. Allocated memory was 143.7 MB in the beginning and 2.6 GB in the end (delta: 2.5 GB). Free memory was 104.5 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,975 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 124.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,976 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1189.79 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 104.3 MB in the beginning and 110.4 MB in the end (delta: -6.1 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.91 ms. Allocated memory is still 205.5 MB. Free memory was 110.4 MB in the beginning and 107.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,976 INFO L168 Benchmark]: Boogie Preprocessor took 33.65 ms. Allocated memory is still 205.5 MB. Free memory was 107.8 MB in the beginning and 105.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,977 INFO L168 Benchmark]: RCFGBuilder took 446.86 ms. Allocated memory was 205.5 MB in the beginning and 232.3 MB in the end (delta: 26.7 MB). Free memory was 105.9 MB in the beginning and 186.2 MB in the end (delta: -80.3 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,977 INFO L168 Benchmark]: TraceAbstraction took 229910.96 ms. Allocated memory was 232.3 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 184.9 MB in the beginning and 1.2 GB in the end (delta: -989.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2020-10-06 01:23:29,979 INFO L336 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 143.7 MB. Free memory was 125.2 MB in the beginning and 124.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1189.79 ms. Allocated memory was 143.7 MB in the beginning and 205.5 MB in the end (delta: 61.9 MB). Free memory was 104.3 MB in the beginning and 110.4 MB in the end (delta: -6.1 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 59.91 ms. Allocated memory is still 205.5 MB. Free memory was 110.4 MB in the beginning and 107.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.65 ms. Allocated memory is still 205.5 MB. Free memory was 107.8 MB in the beginning and 105.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.86 ms. Allocated memory was 205.5 MB in the beginning and 232.3 MB in the end (delta: 26.7 MB). Free memory was 105.9 MB in the beginning and 186.2 MB in the end (delta: -80.3 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 229910.96 ms. Allocated memory was 232.3 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 184.9 MB in the beginning and 1.2 GB in the end (delta: -989.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.1s, 78 ProgramPointsBefore, 19 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 317 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 70 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2973states) and FLOYD_HOARE automaton (currently 102 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (1804 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 229.7s, OverallIterations: 33, TraceHistogramMax: 20, AutomataDifference: 173.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 5419 SDtfs, 8264 SDslu, 287103 SDs, 0 SdLazy, 164457 SolverSat, 1470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 77.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5673 GetRequests, 3720 SyntacticMatches, 187 SemanticMatches, 1766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319915 ImplicationChecksByTransitivity, 78.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 32 MinimizatonAttempts, 58673 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 9.1s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 6116 NumberOfCodeBlocks, 5794 NumberOfCodeBlocksAsserted, 286 NumberOfCheckSat, 6053 ConstructedInterpolants, 0 QuantifiedInterpolants, 2521791 SizeOfPredicates, 147 NumberOfNonLiveVariables, 10912 ConjunctsInSsa, 807 ConjunctsInUnsatCore, 63 InterpolantComputations, 3 PerfectInterpolantSequences, 27231/46582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown