/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 16:05:17,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 16:05:17,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 16:05:17,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 16:05:17,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 16:05:17,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 16:05:17,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 16:05:17,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 16:05:17,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 16:05:17,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 16:05:17,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 16:05:17,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 16:05:17,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 16:05:17,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 16:05:17,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 16:05:17,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 16:05:17,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 16:05:17,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 16:05:17,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 16:05:17,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 16:05:17,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 16:05:17,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 16:05:17,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 16:05:17,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 16:05:17,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 16:05:17,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 16:05:17,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 16:05:17,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 16:05:17,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 16:05:17,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 16:05:17,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 16:05:17,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 16:05:17,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 16:05:17,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 16:05:17,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 16:05:17,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 16:05:17,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 16:05:17,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 16:05:17,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 16:05:17,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 16:05:17,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 16:05:17,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-McrStrategy.epf [2020-04-18 16:05:17,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 16:05:17,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 16:05:17,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 16:05:17,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 16:05:17,083 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 16:05:17,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 16:05:17,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 16:05:17,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 16:05:17,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 16:05:17,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 16:05:17,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 16:05:17,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 16:05:17,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 16:05:17,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 16:05:17,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 16:05:17,086 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 16:05:17,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 16:05:17,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 16:05:17,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 16:05:17,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 16:05:17,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 16:05:17,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 16:05:17,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 16:05:17,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 16:05:17,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 16:05:17,089 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 16:05:17,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 16:05:17,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 16:05:17,089 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 16:05:17,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 16:05:17,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 16:05:17,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 16:05:17,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 16:05:17,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 16:05:17,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 16:05:17,524 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 16:05:17,525 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-04-18 16:05:17,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1b7440/1f881a758ef74672959c7f9f28da6248/FLAGc187c0e72 [2020-04-18 16:05:18,179 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 16:05:18,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-04-18 16:05:18,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1b7440/1f881a758ef74672959c7f9f28da6248/FLAGc187c0e72 [2020-04-18 16:05:18,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e1b7440/1f881a758ef74672959c7f9f28da6248 [2020-04-18 16:05:18,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 16:05:18,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 16:05:18,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 16:05:18,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 16:05:18,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 16:05:18,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 04:05:18" (1/1) ... [2020-04-18 16:05:18,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ac05f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:18, skipping insertion in model container [2020-04-18 16:05:18,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 04:05:18" (1/1) ... [2020-04-18 16:05:18,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 16:05:18,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 16:05:19,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 16:05:19,163 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 16:05:19,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 16:05:19,378 INFO L208 MainTranslator]: Completed translation [2020-04-18 16:05:19,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19 WrapperNode [2020-04-18 16:05:19,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 16:05:19,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 16:05:19,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 16:05:19,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 16:05:19,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 16:05:19,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 16:05:19,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 16:05:19,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 16:05:19,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (1/1) ... [2020-04-18 16:05:19,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 16:05:19,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 16:05:19,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 16:05:19,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 16:05:19,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (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 [2020-04-18 16:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 16:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 16:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 16:05:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-04-18 16:05:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-04-18 16:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 16:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 16:05:19,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 16:05:19,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 16:05:19,607 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 16:05:20,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 16:05:20,131 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-04-18 16:05:20,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 04:05:20 BoogieIcfgContainer [2020-04-18 16:05:20,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 16:05:20,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 16:05:20,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 16:05:20,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 16:05:20,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 04:05:18" (1/3) ... [2020-04-18 16:05:20,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4761ac23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 04:05:20, skipping insertion in model container [2020-04-18 16:05:20,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 04:05:19" (2/3) ... [2020-04-18 16:05:20,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4761ac23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 04:05:20, skipping insertion in model container [2020-04-18 16:05:20,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 04:05:20" (3/3) ... [2020-04-18 16:05:20,144 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-04-18 16:05:20,155 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 16:05:20,156 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 16:05:20,164 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 16:05:20,165 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 16:05:20,193 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,193 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,194 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,194 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,194 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,195 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,195 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,195 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,195 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,195 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,196 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,196 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,196 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,196 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,197 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,197 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,197 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,197 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,198 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,198 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,198 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,198 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,199 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,199 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,199 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,199 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,200 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,200 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,200 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,200 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,201 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,201 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,201 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,201 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,202 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,202 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,202 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,202 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,203 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,203 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,203 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,203 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,203 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,204 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,204 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,204 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,204 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,205 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,205 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,205 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,226 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,226 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,227 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,227 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,227 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,227 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,227 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,228 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,228 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,228 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,228 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,229 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,230 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,230 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,230 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,231 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,231 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,231 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,231 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,232 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,233 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,233 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,233 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,233 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,234 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,234 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,238 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,238 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,238 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,238 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,239 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,239 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,239 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,239 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,240 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,240 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,240 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,240 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,240 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,241 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,241 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,241 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,241 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,241 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,242 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,242 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,242 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,242 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,242 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,243 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,243 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 16:05:20,270 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 16:05:20,287 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 16:05:20,288 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 16:05:20,288 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 16:05:20,288 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 16:05:20,288 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 16:05:20,288 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 16:05:20,288 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 16:05:20,289 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 16:05:20,304 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 105 transitions, 218 flow [2020-04-18 16:05:20,377 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1077 states. [2020-04-18 16:05:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states. [2020-04-18 16:05:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 16:05:20,391 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:20,393 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:20,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash -889928077, now seen corresponding path program 1 times [2020-04-18 16:05:20,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:20,408 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1476696101] [2020-04-18 16:05:20,421 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:20,435 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 28 transitions. [2020-04-18 16:05:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-04-18 16:05:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 16:05:20,441 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash -889928077, now seen corresponding path program 2 times [2020-04-18 16:05:20,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:20,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574248174] [2020-04-18 16:05:20,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:20,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574248174] [2020-04-18 16:05:20,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 16:05:20,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 16:05:20,638 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:20,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:20,653 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 28 transitions. [2020-04-18 16:05:20,653 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:20,658 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 16:05:20,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 16:05:20,666 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-04-18 16:05:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:20,672 INFO L93 Difference]: Finished difference Result 29 states and 28 transitions. [2020-04-18 16:05:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 28 transitions. [2020-04-18 16:05:20,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:20,674 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1476696101] [2020-04-18 16:05:20,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:20,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 16:05:20,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1476696101] [2020-04-18 16:05:20,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-04-18 16:05:20,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 16:05:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 16:05:20,683 INFO L87 Difference]: Start difference. First operand 1077 states. Second operand 2 states. [2020-04-18 16:05:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:20,711 INFO L93 Difference]: Finished difference Result 1077 states and 2161 transitions. [2020-04-18 16:05:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-04-18 16:05:20,713 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2020-04-18 16:05:20,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:20,744 INFO L225 Difference]: With dead ends: 1077 [2020-04-18 16:05:20,745 INFO L226 Difference]: Without dead ends: 1017 [2020-04-18 16:05:20,746 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 16:05:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2020-04-18 16:05:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 1017. [2020-04-18 16:05:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1017 states. [2020-04-18 16:05:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2054 transitions. [2020-04-18 16:05:20,866 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2054 transitions. Word has length 28 [2020-04-18 16:05:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:20,867 INFO L479 AbstractCegarLoop]: Abstraction has 1017 states and 2054 transitions. [2020-04-18 16:05:20,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-04-18 16:05:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2054 transitions. [2020-04-18 16:05:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 16:05:20,869 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:20,869 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:20,870 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1395486702, now seen corresponding path program 1 times [2020-04-18 16:05:20,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:20,871 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1018522357] [2020-04-18 16:05:20,872 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:20,873 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 28 transitions. [2020-04-18 16:05:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-04-18 16:05:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 16:05:20,878 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1395486702, now seen corresponding path program 2 times [2020-04-18 16:05:20,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:20,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157887451] [2020-04-18 16:05:20,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:20,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157887451] [2020-04-18 16:05:20,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 16:05:20,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 16:05:20,998 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:21,001 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:21,006 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 28 transitions. [2020-04-18 16:05:21,006 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:21,020 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 16:05:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 16:05:21,021 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-04-18 16:05:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:21,030 INFO L93 Difference]: Finished difference Result 29 states and 28 transitions. [2020-04-18 16:05:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 28 transitions. [2020-04-18 16:05:21,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:21,031 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1018522357] [2020-04-18 16:05:21,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:21,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 16:05:21,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1018522357] [2020-04-18 16:05:21,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 16:05:21,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 16:05:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 16:05:21,034 INFO L87 Difference]: Start difference. First operand 1017 states and 2054 transitions. Second operand 3 states. [2020-04-18 16:05:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:21,122 INFO L93 Difference]: Finished difference Result 601 states and 1156 transitions. [2020-04-18 16:05:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 16:05:21,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-04-18 16:05:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:21,132 INFO L225 Difference]: With dead ends: 601 [2020-04-18 16:05:21,133 INFO L226 Difference]: Without dead ends: 601 [2020-04-18 16:05:21,135 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 16:05:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-04-18 16:05:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 598. [2020-04-18 16:05:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2020-04-18 16:05:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1153 transitions. [2020-04-18 16:05:21,184 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1153 transitions. Word has length 28 [2020-04-18 16:05:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:21,185 INFO L479 AbstractCegarLoop]: Abstraction has 598 states and 1153 transitions. [2020-04-18 16:05:21,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 16:05:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1153 transitions. [2020-04-18 16:05:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 16:05:21,188 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:21,188 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:21,189 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:21,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1508915281, now seen corresponding path program 1 times [2020-04-18 16:05:21,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:21,192 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1624023633] [2020-04-18 16:05:21,192 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:21,193 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 33 transitions. [2020-04-18 16:05:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-04-18 16:05:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 16:05:21,199 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:21,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1508915281, now seen corresponding path program 2 times [2020-04-18 16:05:21,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:21,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568587595] [2020-04-18 16:05:21,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:21,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568587595] [2020-04-18 16:05:21,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904494496] [2020-04-18 16:05:21,318 INFO L92 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 [2020-04-18 16:05:21,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:21,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:21,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 16:05:21,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:21,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:21,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-04-18 16:05:21,479 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:21,485 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:21,493 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 33 transitions. [2020-04-18 16:05:21,493 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:21,535 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 16:05:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 16:05:21,536 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 7 states. [2020-04-18 16:05:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:21,576 INFO L93 Difference]: Finished difference Result 34 states and 33 transitions. [2020-04-18 16:05:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 33 transitions. [2020-04-18 16:05:21,577 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:21,577 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1624023633] [2020-04-18 16:05:21,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:21,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 16:05:21,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1624023633] [2020-04-18 16:05:21,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 16:05:21,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 16:05:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-18 16:05:21,579 INFO L87 Difference]: Start difference. First operand 598 states and 1153 transitions. Second operand 7 states. [2020-04-18 16:05:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:21,702 INFO L93 Difference]: Finished difference Result 606 states and 1161 transitions. [2020-04-18 16:05:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-18 16:05:21,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-04-18 16:05:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:21,707 INFO L225 Difference]: With dead ends: 606 [2020-04-18 16:05:21,707 INFO L226 Difference]: Without dead ends: 606 [2020-04-18 16:05:21,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-18 16:05:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-04-18 16:05:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 603. [2020-04-18 16:05:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-04-18 16:05:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1158 transitions. [2020-04-18 16:05:21,728 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1158 transitions. Word has length 33 [2020-04-18 16:05:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:21,728 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 1158 transitions. [2020-04-18 16:05:21,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 16:05:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1158 transitions. [2020-04-18 16:05:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 16:05:21,729 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:21,729 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:21,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:21,933 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:21,935 INFO L82 PathProgramCache]: Analyzing trace with hash -781858254, now seen corresponding path program 3 times [2020-04-18 16:05:21,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:21,935 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [182756508] [2020-04-18 16:05:21,936 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:21,938 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 38 transitions. [2020-04-18 16:05:21,938 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-04-18 16:05:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 16:05:21,939 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:21,939 INFO L82 PathProgramCache]: Analyzing trace with hash -781858254, now seen corresponding path program 4 times [2020-04-18 16:05:21,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:21,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724793884] [2020-04-18 16:05:21,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:22,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724793884] [2020-04-18 16:05:22,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379997432] [2020-04-18 16:05:22,067 INFO L92 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 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 [2020-04-18 16:05:22,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:22,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:22,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 16:05:22,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:22,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:22,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-04-18 16:05:22,184 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:22,189 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:22,195 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 38 transitions. [2020-04-18 16:05:22,195 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:22,240 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 16:05:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-18 16:05:22,240 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 9 states. [2020-04-18 16:05:22,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:22,327 INFO L93 Difference]: Finished difference Result 39 states and 38 transitions. [2020-04-18 16:05:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 38 transitions. [2020-04-18 16:05:22,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:22,328 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [182756508] [2020-04-18 16:05:22,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:22,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 16:05:22,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [182756508] [2020-04-18 16:05:22,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 16:05:22,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 16:05:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-18 16:05:22,330 INFO L87 Difference]: Start difference. First operand 603 states and 1158 transitions. Second operand 9 states. [2020-04-18 16:05:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:22,413 INFO L93 Difference]: Finished difference Result 611 states and 1166 transitions. [2020-04-18 16:05:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 16:05:22,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-04-18 16:05:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:22,417 INFO L225 Difference]: With dead ends: 611 [2020-04-18 16:05:22,418 INFO L226 Difference]: Without dead ends: 611 [2020-04-18 16:05:22,418 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-18 16:05:22,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-04-18 16:05:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 608. [2020-04-18 16:05:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-04-18 16:05:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1163 transitions. [2020-04-18 16:05:22,436 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1163 transitions. Word has length 38 [2020-04-18 16:05:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:22,436 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 1163 transitions. [2020-04-18 16:05:22,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 16:05:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1163 transitions. [2020-04-18 16:05:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 16:05:22,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:22,437 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:22,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:22,641 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:22,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1794383473, now seen corresponding path program 5 times [2020-04-18 16:05:22,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:22,642 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1788998879] [2020-04-18 16:05:22,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:22,644 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 43 transitions. [2020-04-18 16:05:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 16:05:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 16:05:22,645 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1794383473, now seen corresponding path program 6 times [2020-04-18 16:05:22,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:22,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201618156] [2020-04-18 16:05:22,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:22,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201618156] [2020-04-18 16:05:22,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368512460] [2020-04-18 16:05:22,810 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-18 16:05:22,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 16:05:22,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:22,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 16:05:22,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:22,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:22,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-04-18 16:05:22,936 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:22,968 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:22,977 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 43 transitions. [2020-04-18 16:05:22,977 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:23,051 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 16:05:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-18 16:05:23,052 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 16:05:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:23,185 INFO L93 Difference]: Finished difference Result 44 states and 43 transitions. [2020-04-18 16:05:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 43 transitions. [2020-04-18 16:05:23,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:23,186 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1788998879] [2020-04-18 16:05:23,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:23,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-04-18 16:05:23,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1788998879] [2020-04-18 16:05:23,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 16:05:23,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:23,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 16:05:23,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-04-18 16:05:23,188 INFO L87 Difference]: Start difference. First operand 608 states and 1163 transitions. Second operand 11 states. [2020-04-18 16:05:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:23,313 INFO L93 Difference]: Finished difference Result 616 states and 1171 transitions. [2020-04-18 16:05:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 16:05:23,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-04-18 16:05:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:23,318 INFO L225 Difference]: With dead ends: 616 [2020-04-18 16:05:23,318 INFO L226 Difference]: Without dead ends: 616 [2020-04-18 16:05:23,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-04-18 16:05:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2020-04-18 16:05:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 613. [2020-04-18 16:05:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-04-18 16:05:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1168 transitions. [2020-04-18 16:05:23,341 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1168 transitions. Word has length 43 [2020-04-18 16:05:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:23,343 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 1168 transitions. [2020-04-18 16:05:23,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 16:05:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1168 transitions. [2020-04-18 16:05:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 16:05:23,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:23,345 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:23,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:23,555 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash 122608722, now seen corresponding path program 7 times [2020-04-18 16:05:23,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:23,556 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1952122818] [2020-04-18 16:05:23,558 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:23,559 INFO L259 McrAutomatonBuilder]: Finished intersection with 49 states and 48 transitions. [2020-04-18 16:05:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-04-18 16:05:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 16:05:23,560 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:23,561 INFO L82 PathProgramCache]: Analyzing trace with hash 122608722, now seen corresponding path program 8 times [2020-04-18 16:05:23,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:23,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128270654] [2020-04-18 16:05:23,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:23,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128270654] [2020-04-18 16:05:23,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722208632] [2020-04-18 16:05:23,692 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-04-18 16:05:23,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:23,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:23,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 16:05:23,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:23,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:23,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-04-18 16:05:23,789 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:23,795 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:23,807 INFO L259 McrAutomatonBuilder]: Finished intersection with 49 states and 48 transitions. [2020-04-18 16:05:23,807 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:23,918 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:23,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 16:05:23,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-18 16:05:23,919 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 13 states. [2020-04-18 16:05:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:24,101 INFO L93 Difference]: Finished difference Result 49 states and 48 transitions. [2020-04-18 16:05:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 48 transitions. [2020-04-18 16:05:24,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:24,102 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1952122818] [2020-04-18 16:05:24,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:24,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 16:05:24,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1952122818] [2020-04-18 16:05:24,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 16:05:24,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 16:05:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-18 16:05:24,104 INFO L87 Difference]: Start difference. First operand 613 states and 1168 transitions. Second operand 13 states. [2020-04-18 16:05:24,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:24,194 INFO L93 Difference]: Finished difference Result 621 states and 1176 transitions. [2020-04-18 16:05:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 16:05:24,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-04-18 16:05:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:24,199 INFO L225 Difference]: With dead ends: 621 [2020-04-18 16:05:24,199 INFO L226 Difference]: Without dead ends: 621 [2020-04-18 16:05:24,199 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-18 16:05:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-04-18 16:05:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 618. [2020-04-18 16:05:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-04-18 16:05:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1173 transitions. [2020-04-18 16:05:24,216 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1173 transitions. Word has length 48 [2020-04-18 16:05:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:24,216 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 1173 transitions. [2020-04-18 16:05:24,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 16:05:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1173 transitions. [2020-04-18 16:05:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-18 16:05:24,217 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:24,217 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:24,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:24,422 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1768348817, now seen corresponding path program 9 times [2020-04-18 16:05:24,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:24,423 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2088555704] [2020-04-18 16:05:24,425 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:24,427 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 53 transitions. [2020-04-18 16:05:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-04-18 16:05:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-18 16:05:24,428 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:24,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1768348817, now seen corresponding path program 10 times [2020-04-18 16:05:24,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:24,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741253982] [2020-04-18 16:05:24,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:24,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741253982] [2020-04-18 16:05:24,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850316138] [2020-04-18 16:05:24,607 INFO L92 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 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 [2020-04-18 16:05:24,685 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:24,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:24,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 16:05:24,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:24,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:24,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-04-18 16:05:24,739 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:24,754 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:24,767 INFO L259 McrAutomatonBuilder]: Finished intersection with 54 states and 53 transitions. [2020-04-18 16:05:24,767 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:24,866 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 16:05:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 16:05:24,866 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 15 states. [2020-04-18 16:05:25,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:25,210 INFO L93 Difference]: Finished difference Result 54 states and 53 transitions. [2020-04-18 16:05:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 53 transitions. [2020-04-18 16:05:25,210 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:25,211 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2088555704] [2020-04-18 16:05:25,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:25,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 16:05:25,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2088555704] [2020-04-18 16:05:25,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 16:05:25,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 16:05:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-18 16:05:25,212 INFO L87 Difference]: Start difference. First operand 618 states and 1173 transitions. Second operand 15 states. [2020-04-18 16:05:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:25,322 INFO L93 Difference]: Finished difference Result 626 states and 1181 transitions. [2020-04-18 16:05:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-18 16:05:25,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-04-18 16:05:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:25,327 INFO L225 Difference]: With dead ends: 626 [2020-04-18 16:05:25,327 INFO L226 Difference]: Without dead ends: 626 [2020-04-18 16:05:25,327 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-18 16:05:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-04-18 16:05:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 623. [2020-04-18 16:05:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-04-18 16:05:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1178 transitions. [2020-04-18 16:05:25,343 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1178 transitions. Word has length 53 [2020-04-18 16:05:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:25,344 INFO L479 AbstractCegarLoop]: Abstraction has 623 states and 1178 transitions. [2020-04-18 16:05:25,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 16:05:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1178 transitions. [2020-04-18 16:05:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-04-18 16:05:25,345 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:25,345 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:25,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:25,549 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1595917938, now seen corresponding path program 11 times [2020-04-18 16:05:25,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:25,550 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1384810175] [2020-04-18 16:05:25,552 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:25,553 INFO L259 McrAutomatonBuilder]: Finished intersection with 59 states and 58 transitions. [2020-04-18 16:05:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-04-18 16:05:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-04-18 16:05:25,554 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1595917938, now seen corresponding path program 12 times [2020-04-18 16:05:25,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:25,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873794521] [2020-04-18 16:05:25,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:25,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873794521] [2020-04-18 16:05:25,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235811771] [2020-04-18 16:05:25,691 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:25,805 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-18 16:05:25,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:25,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 16:05:25,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:25,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:25,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-04-18 16:05:25,857 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:25,867 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:25,881 INFO L259 McrAutomatonBuilder]: Finished intersection with 59 states and 58 transitions. [2020-04-18 16:05:25,881 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:25,993 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 16:05:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-18 16:05:25,994 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 17 states. [2020-04-18 16:05:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:26,398 INFO L93 Difference]: Finished difference Result 59 states and 58 transitions. [2020-04-18 16:05:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 58 transitions. [2020-04-18 16:05:26,399 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:26,399 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1384810175] [2020-04-18 16:05:26,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:26,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-04-18 16:05:26,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1384810175] [2020-04-18 16:05:26,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 16:05:26,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:26,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 16:05:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-04-18 16:05:26,401 INFO L87 Difference]: Start difference. First operand 623 states and 1178 transitions. Second operand 17 states. [2020-04-18 16:05:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:26,523 INFO L93 Difference]: Finished difference Result 631 states and 1186 transitions. [2020-04-18 16:05:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 16:05:26,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-04-18 16:05:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:26,528 INFO L225 Difference]: With dead ends: 631 [2020-04-18 16:05:26,528 INFO L226 Difference]: Without dead ends: 631 [2020-04-18 16:05:26,528 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-04-18 16:05:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-04-18 16:05:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 628. [2020-04-18 16:05:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-04-18 16:05:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 1183 transitions. [2020-04-18 16:05:26,544 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 1183 transitions. Word has length 58 [2020-04-18 16:05:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:26,545 INFO L479 AbstractCegarLoop]: Abstraction has 628 states and 1183 transitions. [2020-04-18 16:05:26,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 16:05:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 1183 transitions. [2020-04-18 16:05:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-04-18 16:05:26,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:26,546 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:26,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:26,758 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash 627412303, now seen corresponding path program 13 times [2020-04-18 16:05:26,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:26,759 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [923197832] [2020-04-18 16:05:26,761 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:26,764 INFO L259 McrAutomatonBuilder]: Finished intersection with 64 states and 63 transitions. [2020-04-18 16:05:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-04-18 16:05:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-04-18 16:05:26,765 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 627412303, now seen corresponding path program 14 times [2020-04-18 16:05:26,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:26,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732068503] [2020-04-18 16:05:26,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:26,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732068503] [2020-04-18 16:05:26,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687064711] [2020-04-18 16:05:26,968 INFO L92 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 [2020-04-18 16:05:27,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:27,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:27,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 16:05:27,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:27,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:27,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-04-18 16:05:27,076 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:27,087 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:27,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 64 states and 63 transitions. [2020-04-18 16:05:27,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:27,239 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:27,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 16:05:27,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-04-18 16:05:27,240 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 19 states. [2020-04-18 16:05:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:27,762 INFO L93 Difference]: Finished difference Result 64 states and 63 transitions. [2020-04-18 16:05:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 63 transitions. [2020-04-18 16:05:27,763 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:27,764 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [923197832] [2020-04-18 16:05:27,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:27,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-04-18 16:05:27,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [923197832] [2020-04-18 16:05:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 16:05:27,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 16:05:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 16:05:27,766 INFO L87 Difference]: Start difference. First operand 628 states and 1183 transitions. Second operand 19 states. [2020-04-18 16:05:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:27,894 INFO L93 Difference]: Finished difference Result 636 states and 1191 transitions. [2020-04-18 16:05:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 16:05:27,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-04-18 16:05:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:27,899 INFO L225 Difference]: With dead ends: 636 [2020-04-18 16:05:27,899 INFO L226 Difference]: Without dead ends: 636 [2020-04-18 16:05:27,900 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 16:05:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2020-04-18 16:05:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 633. [2020-04-18 16:05:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-04-18 16:05:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1188 transitions. [2020-04-18 16:05:27,917 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1188 transitions. Word has length 63 [2020-04-18 16:05:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:27,917 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 1188 transitions. [2020-04-18 16:05:27,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 16:05:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1188 transitions. [2020-04-18 16:05:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-04-18 16:05:27,918 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:27,919 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:28,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:28,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash -622163822, now seen corresponding path program 15 times [2020-04-18 16:05:28,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:28,125 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2100960065] [2020-04-18 16:05:28,126 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:28,128 INFO L259 McrAutomatonBuilder]: Finished intersection with 69 states and 68 transitions. [2020-04-18 16:05:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2020-04-18 16:05:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-04-18 16:05:28,129 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -622163822, now seen corresponding path program 16 times [2020-04-18 16:05:28,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:28,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006829547] [2020-04-18 16:05:28,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:28,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006829547] [2020-04-18 16:05:28,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592469568] [2020-04-18 16:05:28,389 INFO L92 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 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 [2020-04-18 16:05:28,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:28,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:28,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 16:05:28,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:28,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:28,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-04-18 16:05:28,541 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:28,559 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:28,584 INFO L259 McrAutomatonBuilder]: Finished intersection with 69 states and 68 transitions. [2020-04-18 16:05:28,584 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:28,869 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:28,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 16:05:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-04-18 16:05:28,869 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 21 states. [2020-04-18 16:05:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:29,456 INFO L93 Difference]: Finished difference Result 69 states and 68 transitions. [2020-04-18 16:05:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 68 transitions. [2020-04-18 16:05:29,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:29,457 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2100960065] [2020-04-18 16:05:29,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:29,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 16:05:29,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2100960065] [2020-04-18 16:05:29,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 16:05:29,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:29,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 16:05:29,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 16:05:29,459 INFO L87 Difference]: Start difference. First operand 633 states and 1188 transitions. Second operand 21 states. [2020-04-18 16:05:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:29,659 INFO L93 Difference]: Finished difference Result 641 states and 1196 transitions. [2020-04-18 16:05:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 16:05:29,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-04-18 16:05:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:29,664 INFO L225 Difference]: With dead ends: 641 [2020-04-18 16:05:29,664 INFO L226 Difference]: Without dead ends: 641 [2020-04-18 16:05:29,665 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 16:05:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-04-18 16:05:29,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 638. [2020-04-18 16:05:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-04-18 16:05:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1193 transitions. [2020-04-18 16:05:29,680 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1193 transitions. Word has length 68 [2020-04-18 16:05:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:29,680 INFO L479 AbstractCegarLoop]: Abstraction has 638 states and 1193 transitions. [2020-04-18 16:05:29,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 16:05:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1193 transitions. [2020-04-18 16:05:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-18 16:05:29,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:29,681 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:29,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:29,885 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1163976913, now seen corresponding path program 17 times [2020-04-18 16:05:29,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:29,886 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [40011554] [2020-04-18 16:05:29,889 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:29,890 INFO L259 McrAutomatonBuilder]: Finished intersection with 74 states and 73 transitions. [2020-04-18 16:05:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-04-18 16:05:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-04-18 16:05:29,891 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1163976913, now seen corresponding path program 18 times [2020-04-18 16:05:29,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:29,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91512945] [2020-04-18 16:05:29,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:30,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91512945] [2020-04-18 16:05:30,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119795983] [2020-04-18 16:05:30,140 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:30,263 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-18 16:05:30,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:30,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 16:05:30,266 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:30,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:30,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-04-18 16:05:30,297 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:30,314 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:30,385 INFO L259 McrAutomatonBuilder]: Finished intersection with 74 states and 73 transitions. [2020-04-18 16:05:30,385 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:30,569 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:30,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 16:05:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-04-18 16:05:30,570 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 23 states. [2020-04-18 16:05:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:31,285 INFO L93 Difference]: Finished difference Result 74 states and 73 transitions. [2020-04-18 16:05:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 73 transitions. [2020-04-18 16:05:31,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:31,286 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [40011554] [2020-04-18 16:05:31,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:31,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-04-18 16:05:31,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [40011554] [2020-04-18 16:05:31,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 16:05:31,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 16:05:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 16:05:31,290 INFO L87 Difference]: Start difference. First operand 638 states and 1193 transitions. Second operand 23 states. [2020-04-18 16:05:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:31,427 INFO L93 Difference]: Finished difference Result 646 states and 1201 transitions. [2020-04-18 16:05:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 16:05:31,428 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-04-18 16:05:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:31,431 INFO L225 Difference]: With dead ends: 646 [2020-04-18 16:05:31,431 INFO L226 Difference]: Without dead ends: 646 [2020-04-18 16:05:31,432 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 16:05:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-04-18 16:05:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 643. [2020-04-18 16:05:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-04-18 16:05:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1198 transitions. [2020-04-18 16:05:31,446 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1198 transitions. Word has length 73 [2020-04-18 16:05:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:31,446 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 1198 transitions. [2020-04-18 16:05:31,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 16:05:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1198 transitions. [2020-04-18 16:05:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-04-18 16:05:31,447 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:31,447 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:31,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:31,652 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:31,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1908333902, now seen corresponding path program 19 times [2020-04-18 16:05:31,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:31,653 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [554486527] [2020-04-18 16:05:31,654 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:31,656 INFO L259 McrAutomatonBuilder]: Finished intersection with 79 states and 78 transitions. [2020-04-18 16:05:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-04-18 16:05:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-04-18 16:05:31,657 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:31,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1908333902, now seen corresponding path program 20 times [2020-04-18 16:05:31,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:31,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145257717] [2020-04-18 16:05:31,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:31,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145257717] [2020-04-18 16:05:31,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271234746] [2020-04-18 16:05:31,947 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:32,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:32,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:32,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 16:05:32,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:32,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:32,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-04-18 16:05:32,043 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:32,054 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:32,074 INFO L259 McrAutomatonBuilder]: Finished intersection with 79 states and 78 transitions. [2020-04-18 16:05:32,074 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:32,240 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:32,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 16:05:32,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-04-18 16:05:32,241 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 25 states. [2020-04-18 16:05:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:33,079 INFO L93 Difference]: Finished difference Result 79 states and 78 transitions. [2020-04-18 16:05:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 78 transitions. [2020-04-18 16:05:33,080 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:33,080 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [554486527] [2020-04-18 16:05:33,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:33,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-04-18 16:05:33,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [554486527] [2020-04-18 16:05:33,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 16:05:33,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 16:05:33,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 16:05:33,082 INFO L87 Difference]: Start difference. First operand 643 states and 1198 transitions. Second operand 25 states. [2020-04-18 16:05:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:33,327 INFO L93 Difference]: Finished difference Result 651 states and 1206 transitions. [2020-04-18 16:05:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 16:05:33,328 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-04-18 16:05:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:33,331 INFO L225 Difference]: With dead ends: 651 [2020-04-18 16:05:33,331 INFO L226 Difference]: Without dead ends: 651 [2020-04-18 16:05:33,332 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 16:05:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-04-18 16:05:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 648. [2020-04-18 16:05:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-04-18 16:05:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1203 transitions. [2020-04-18 16:05:33,344 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1203 transitions. Word has length 78 [2020-04-18 16:05:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:33,345 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 1203 transitions. [2020-04-18 16:05:33,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 16:05:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1203 transitions. [2020-04-18 16:05:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-04-18 16:05:33,346 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:33,346 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:33,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:33,550 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1376528113, now seen corresponding path program 21 times [2020-04-18 16:05:33,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:33,551 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1792519222] [2020-04-18 16:05:33,553 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:33,554 INFO L259 McrAutomatonBuilder]: Finished intersection with 84 states and 83 transitions. [2020-04-18 16:05:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-04-18 16:05:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-04-18 16:05:33,555 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1376528113, now seen corresponding path program 22 times [2020-04-18 16:05:33,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:33,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52788822] [2020-04-18 16:05:33,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:33,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52788822] [2020-04-18 16:05:33,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680104437] [2020-04-18 16:05:33,821 INFO L92 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 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 [2020-04-18 16:05:33,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:33,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:33,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-18 16:05:33,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:33,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:33,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-04-18 16:05:33,941 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:33,957 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:33,979 INFO L259 McrAutomatonBuilder]: Finished intersection with 84 states and 83 transitions. [2020-04-18 16:05:33,979 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:34,208 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 16:05:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-04-18 16:05:34,210 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 27 states. [2020-04-18 16:05:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:35,183 INFO L93 Difference]: Finished difference Result 84 states and 83 transitions. [2020-04-18 16:05:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 83 transitions. [2020-04-18 16:05:35,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:35,185 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1792519222] [2020-04-18 16:05:35,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:35,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 16:05:35,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1792519222] [2020-04-18 16:05:35,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 16:05:35,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 16:05:35,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 16:05:35,187 INFO L87 Difference]: Start difference. First operand 648 states and 1203 transitions. Second operand 27 states. [2020-04-18 16:05:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:35,319 INFO L93 Difference]: Finished difference Result 656 states and 1211 transitions. [2020-04-18 16:05:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-18 16:05:35,319 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 83 [2020-04-18 16:05:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:35,321 INFO L225 Difference]: With dead ends: 656 [2020-04-18 16:05:35,322 INFO L226 Difference]: Without dead ends: 656 [2020-04-18 16:05:35,323 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 16:05:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-04-18 16:05:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 653. [2020-04-18 16:05:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2020-04-18 16:05:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1208 transitions. [2020-04-18 16:05:35,335 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1208 transitions. Word has length 83 [2020-04-18 16:05:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:35,335 INFO L479 AbstractCegarLoop]: Abstraction has 653 states and 1208 transitions. [2020-04-18 16:05:35,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 16:05:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1208 transitions. [2020-04-18 16:05:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-04-18 16:05:35,336 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:35,336 INFO L425 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:35,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:35,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1103784750, now seen corresponding path program 23 times [2020-04-18 16:05:35,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:35,543 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [438348351] [2020-04-18 16:05:35,546 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:35,548 INFO L259 McrAutomatonBuilder]: Finished intersection with 89 states and 88 transitions. [2020-04-18 16:05:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-04-18 16:05:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-04-18 16:05:35,548 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1103784750, now seen corresponding path program 24 times [2020-04-18 16:05:35,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:35,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321576900] [2020-04-18 16:05:35,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321576900] [2020-04-18 16:05:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930007839] [2020-04-18 16:05:35,918 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-18 16:05:36,094 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-04-18 16:05:36,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:36,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-18 16:05:36,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:36,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:36,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-04-18 16:05:36,147 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:36,171 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:36,215 INFO L259 McrAutomatonBuilder]: Finished intersection with 89 states and 88 transitions. [2020-04-18 16:05:36,216 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:36,545 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 16:05:36,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-04-18 16:05:36,546 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 29 states. [2020-04-18 16:05:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:37,689 INFO L93 Difference]: Finished difference Result 89 states and 88 transitions. [2020-04-18 16:05:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 88 transitions. [2020-04-18 16:05:37,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:37,690 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [438348351] [2020-04-18 16:05:37,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:37,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-04-18 16:05:37,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [438348351] [2020-04-18 16:05:37,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-04-18 16:05:37,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:37,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 16:05:37,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 16:05:37,692 INFO L87 Difference]: Start difference. First operand 653 states and 1208 transitions. Second operand 29 states. [2020-04-18 16:05:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:37,965 INFO L93 Difference]: Finished difference Result 661 states and 1216 transitions. [2020-04-18 16:05:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 16:05:37,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-04-18 16:05:37,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:37,970 INFO L225 Difference]: With dead ends: 661 [2020-04-18 16:05:37,970 INFO L226 Difference]: Without dead ends: 661 [2020-04-18 16:05:37,971 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 16:05:37,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-04-18 16:05:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 658. [2020-04-18 16:05:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-04-18 16:05:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1213 transitions. [2020-04-18 16:05:37,984 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1213 transitions. Word has length 88 [2020-04-18 16:05:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:37,984 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 1213 transitions. [2020-04-18 16:05:37,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-04-18 16:05:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1213 transitions. [2020-04-18 16:05:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-04-18 16:05:37,985 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:37,985 INFO L425 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:38,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:38,190 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:38,191 INFO L82 PathProgramCache]: Analyzing trace with hash 361872111, now seen corresponding path program 25 times [2020-04-18 16:05:38,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:38,191 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1402316122] [2020-04-18 16:05:38,194 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:38,197 INFO L259 McrAutomatonBuilder]: Finished intersection with 94 states and 93 transitions. [2020-04-18 16:05:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-04-18 16:05:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-04-18 16:05:38,198 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash 361872111, now seen corresponding path program 26 times [2020-04-18 16:05:38,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:38,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781949211] [2020-04-18 16:05:38,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781949211] [2020-04-18 16:05:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879241901] [2020-04-18 16:05:38,744 INFO L92 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 [2020-04-18 16:05:38,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:38,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:38,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-18 16:05:38,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:38,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:38,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-04-18 16:05:38,872 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:38,891 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:38,920 INFO L259 McrAutomatonBuilder]: Finished intersection with 94 states and 93 transitions. [2020-04-18 16:05:38,920 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:39,172 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:39,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 16:05:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-04-18 16:05:39,173 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 31 states. [2020-04-18 16:05:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:40,478 INFO L93 Difference]: Finished difference Result 94 states and 93 transitions. [2020-04-18 16:05:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 93 transitions. [2020-04-18 16:05:40,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:40,479 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1402316122] [2020-04-18 16:05:40,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:40,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-04-18 16:05:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1402316122] [2020-04-18 16:05:40,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 16:05:40,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 16:05:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 16:05:40,481 INFO L87 Difference]: Start difference. First operand 658 states and 1213 transitions. Second operand 31 states. [2020-04-18 16:05:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:40,714 INFO L93 Difference]: Finished difference Result 666 states and 1221 transitions. [2020-04-18 16:05:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 16:05:40,714 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 93 [2020-04-18 16:05:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:40,717 INFO L225 Difference]: With dead ends: 666 [2020-04-18 16:05:40,717 INFO L226 Difference]: Without dead ends: 666 [2020-04-18 16:05:40,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 16:05:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2020-04-18 16:05:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 663. [2020-04-18 16:05:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-04-18 16:05:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1218 transitions. [2020-04-18 16:05:40,730 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1218 transitions. Word has length 93 [2020-04-18 16:05:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:40,730 INFO L479 AbstractCegarLoop]: Abstraction has 663 states and 1218 transitions. [2020-04-18 16:05:40,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 16:05:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1218 transitions. [2020-04-18 16:05:40,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-04-18 16:05:40,731 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:40,732 INFO L425 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:40,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:40,935 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash 22666994, now seen corresponding path program 27 times [2020-04-18 16:05:40,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:40,936 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [924892019] [2020-04-18 16:05:40,938 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:40,941 INFO L259 McrAutomatonBuilder]: Finished intersection with 99 states and 98 transitions. [2020-04-18 16:05:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-04-18 16:05:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-04-18 16:05:40,942 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash 22666994, now seen corresponding path program 28 times [2020-04-18 16:05:40,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:40,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558427792] [2020-04-18 16:05:40,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:41,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558427792] [2020-04-18 16:05:41,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606362408] [2020-04-18 16:05:41,376 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:41,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:41,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:41,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2020-04-18 16:05:41,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:41,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:41,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-04-18 16:05:41,530 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:41,553 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:41,593 INFO L259 McrAutomatonBuilder]: Finished intersection with 99 states and 98 transitions. [2020-04-18 16:05:41,593 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:41,870 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:41,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 16:05:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 16:05:41,871 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 33 states. [2020-04-18 16:05:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:43,314 INFO L93 Difference]: Finished difference Result 99 states and 98 transitions. [2020-04-18 16:05:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 98 transitions. [2020-04-18 16:05:43,315 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:43,315 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [924892019] [2020-04-18 16:05:43,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:43,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-04-18 16:05:43,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [924892019] [2020-04-18 16:05:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 16:05:43,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 16:05:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 16:05:43,318 INFO L87 Difference]: Start difference. First operand 663 states and 1218 transitions. Second operand 33 states. [2020-04-18 16:05:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:43,714 INFO L93 Difference]: Finished difference Result 671 states and 1226 transitions. [2020-04-18 16:05:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-18 16:05:43,719 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 98 [2020-04-18 16:05:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:43,721 INFO L225 Difference]: With dead ends: 671 [2020-04-18 16:05:43,721 INFO L226 Difference]: Without dead ends: 671 [2020-04-18 16:05:43,723 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1159, Invalid=2501, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 16:05:43,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-04-18 16:05:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 668. [2020-04-18 16:05:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-04-18 16:05:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1223 transitions. [2020-04-18 16:05:43,733 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1223 transitions. Word has length 98 [2020-04-18 16:05:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:43,733 INFO L479 AbstractCegarLoop]: Abstraction has 668 states and 1223 transitions. [2020-04-18 16:05:43,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 16:05:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1223 transitions. [2020-04-18 16:05:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-04-18 16:05:43,734 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:43,734 INFO L425 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:43,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:43,942 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1507408689, now seen corresponding path program 29 times [2020-04-18 16:05:43,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:43,943 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1717920069] [2020-04-18 16:05:43,946 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:43,949 INFO L259 McrAutomatonBuilder]: Finished intersection with 104 states and 103 transitions. [2020-04-18 16:05:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states. [2020-04-18 16:05:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-04-18 16:05:43,950 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1507408689, now seen corresponding path program 30 times [2020-04-18 16:05:43,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:43,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288179256] [2020-04-18 16:05:43,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288179256] [2020-04-18 16:05:44,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108813529] [2020-04-18 16:05:44,373 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:44,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-04-18 16:05:44,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:44,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2020-04-18 16:05:44,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:44,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:44,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-04-18 16:05:44,911 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:45,007 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:45,044 INFO L259 McrAutomatonBuilder]: Finished intersection with 104 states and 103 transitions. [2020-04-18 16:05:45,045 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:45,385 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 16:05:45,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 16:05:45,386 INFO L87 Difference]: Start difference. First operand 104 states. Second operand 35 states. [2020-04-18 16:05:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:47,008 INFO L93 Difference]: Finished difference Result 104 states and 103 transitions. [2020-04-18 16:05:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 103 transitions. [2020-04-18 16:05:47,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:47,009 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1717920069] [2020-04-18 16:05:47,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:47,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-04-18 16:05:47,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1717920069] [2020-04-18 16:05:47,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-04-18 16:05:47,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 16:05:47,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 16:05:47,012 INFO L87 Difference]: Start difference. First operand 668 states and 1223 transitions. Second operand 35 states. [2020-04-18 16:05:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:47,344 INFO L93 Difference]: Finished difference Result 676 states and 1231 transitions. [2020-04-18 16:05:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 16:05:47,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-04-18 16:05:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:47,347 INFO L225 Difference]: With dead ends: 676 [2020-04-18 16:05:47,347 INFO L226 Difference]: Without dead ends: 676 [2020-04-18 16:05:47,348 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 16:05:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-04-18 16:05:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 673. [2020-04-18 16:05:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2020-04-18 16:05:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1228 transitions. [2020-04-18 16:05:47,367 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1228 transitions. Word has length 103 [2020-04-18 16:05:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:47,367 INFO L479 AbstractCegarLoop]: Abstraction has 673 states and 1228 transitions. [2020-04-18 16:05:47,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-04-18 16:05:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1228 transitions. [2020-04-18 16:05:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-04-18 16:05:47,368 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:47,368 INFO L425 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:47,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:47,572 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1606418706, now seen corresponding path program 31 times [2020-04-18 16:05:47,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:47,573 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [9027386] [2020-04-18 16:05:47,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:47,580 INFO L259 McrAutomatonBuilder]: Finished intersection with 109 states and 108 transitions. [2020-04-18 16:05:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-04-18 16:05:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-04-18 16:05:47,581 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1606418706, now seen corresponding path program 32 times [2020-04-18 16:05:47,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:47,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949586200] [2020-04-18 16:05:47,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:48,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949586200] [2020-04-18 16:05:48,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571486459] [2020-04-18 16:05:48,080 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-04-18 16:05:48,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:05:48,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:48,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2020-04-18 16:05:48,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:48,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:48,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-04-18 16:05:48,208 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:48,237 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:48,302 INFO L259 McrAutomatonBuilder]: Finished intersection with 109 states and 108 transitions. [2020-04-18 16:05:48,302 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:48,746 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:48,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 16:05:48,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 16:05:48,747 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 37 states. [2020-04-18 16:05:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:50,549 INFO L93 Difference]: Finished difference Result 109 states and 108 transitions. [2020-04-18 16:05:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 108 transitions. [2020-04-18 16:05:50,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:50,550 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [9027386] [2020-04-18 16:05:50,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:50,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-04-18 16:05:50,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [9027386] [2020-04-18 16:05:50,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 16:05:50,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:50,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 16:05:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 16:05:50,553 INFO L87 Difference]: Start difference. First operand 673 states and 1228 transitions. Second operand 37 states. [2020-04-18 16:05:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:50,868 INFO L93 Difference]: Finished difference Result 681 states and 1236 transitions. [2020-04-18 16:05:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-04-18 16:05:50,869 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-04-18 16:05:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:50,871 INFO L225 Difference]: With dead ends: 681 [2020-04-18 16:05:50,871 INFO L226 Difference]: Without dead ends: 681 [2020-04-18 16:05:50,872 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 16:05:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-04-18 16:05:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 678. [2020-04-18 16:05:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 678 states. [2020-04-18 16:05:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1233 transitions. [2020-04-18 16:05:50,882 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1233 transitions. Word has length 108 [2020-04-18 16:05:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:50,883 INFO L479 AbstractCegarLoop]: Abstraction has 678 states and 1233 transitions. [2020-04-18 16:05:50,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 16:05:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1233 transitions. [2020-04-18 16:05:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-04-18 16:05:50,884 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:50,884 INFO L425 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:51,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:51,094 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1830750545, now seen corresponding path program 33 times [2020-04-18 16:05:51,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:51,094 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2095939200] [2020-04-18 16:05:51,096 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:51,099 INFO L259 McrAutomatonBuilder]: Finished intersection with 114 states and 113 transitions. [2020-04-18 16:05:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-04-18 16:05:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-04-18 16:05:51,100 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1830750545, now seen corresponding path program 34 times [2020-04-18 16:05:51,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:51,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054990350] [2020-04-18 16:05:51,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:51,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054990350] [2020-04-18 16:05:51,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675004004] [2020-04-18 16:05:51,599 INFO L92 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 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 [2020-04-18 16:05:51,659 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:05:51,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:51,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2020-04-18 16:05:51,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:51,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:51,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-04-18 16:05:51,705 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:51,772 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:51,834 INFO L259 McrAutomatonBuilder]: Finished intersection with 114 states and 113 transitions. [2020-04-18 16:05:51,834 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:52,516 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 16:05:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 16:05:52,517 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 39 states. [2020-04-18 16:05:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:54,726 INFO L93 Difference]: Finished difference Result 114 states and 113 transitions. [2020-04-18 16:05:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 113 transitions. [2020-04-18 16:05:54,727 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:54,727 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2095939200] [2020-04-18 16:05:54,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:54,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-04-18 16:05:54,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2095939200] [2020-04-18 16:05:54,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-04-18 16:05:54,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:54,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 16:05:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 16:05:54,729 INFO L87 Difference]: Start difference. First operand 678 states and 1233 transitions. Second operand 39 states. [2020-04-18 16:05:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:55,027 INFO L93 Difference]: Finished difference Result 686 states and 1241 transitions. [2020-04-18 16:05:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-04-18 16:05:55,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 113 [2020-04-18 16:05:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:55,031 INFO L225 Difference]: With dead ends: 686 [2020-04-18 16:05:55,031 INFO L226 Difference]: Without dead ends: 686 [2020-04-18 16:05:55,032 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 16:05:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-04-18 16:05:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 683. [2020-04-18 16:05:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2020-04-18 16:05:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1238 transitions. [2020-04-18 16:05:55,045 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1238 transitions. Word has length 113 [2020-04-18 16:05:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:55,045 INFO L479 AbstractCegarLoop]: Abstraction has 683 states and 1238 transitions. [2020-04-18 16:05:55,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-04-18 16:05:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1238 transitions. [2020-04-18 16:05:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-04-18 16:05:55,046 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:55,046 INFO L425 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:55,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:55,250 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1928985394, now seen corresponding path program 35 times [2020-04-18 16:05:55,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:55,251 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [53644120] [2020-04-18 16:05:55,253 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:55,256 INFO L259 McrAutomatonBuilder]: Finished intersection with 119 states and 118 transitions. [2020-04-18 16:05:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-04-18 16:05:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-04-18 16:05:55,258 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1928985394, now seen corresponding path program 36 times [2020-04-18 16:05:55,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:55,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705731270] [2020-04-18 16:05:55,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:05:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705731270] [2020-04-18 16:05:55,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621050213] [2020-04-18 16:05:55,781 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:56,270 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-04-18 16:05:56,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:05:56,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2020-04-18 16:05:56,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:05:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:05:56,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:05:56,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-04-18 16:05:56,333 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:05:56,355 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:56,405 INFO L259 McrAutomatonBuilder]: Finished intersection with 119 states and 118 transitions. [2020-04-18 16:05:56,406 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:05:56,877 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:05:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 16:05:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 16:05:56,878 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 41 states. [2020-04-18 16:05:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:59,108 INFO L93 Difference]: Finished difference Result 119 states and 118 transitions. [2020-04-18 16:05:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 118 transitions. [2020-04-18 16:05:59,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:05:59,109 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [53644120] [2020-04-18 16:05:59,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:05:59,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-04-18 16:05:59,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [53644120] [2020-04-18 16:05:59,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 16:05:59,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:05:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 16:05:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 16:05:59,111 INFO L87 Difference]: Start difference. First operand 683 states and 1238 transitions. Second operand 41 states. [2020-04-18 16:05:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:05:59,469 INFO L93 Difference]: Finished difference Result 691 states and 1246 transitions. [2020-04-18 16:05:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-04-18 16:05:59,470 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2020-04-18 16:05:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:05:59,472 INFO L225 Difference]: With dead ends: 691 [2020-04-18 16:05:59,472 INFO L226 Difference]: Without dead ends: 691 [2020-04-18 16:05:59,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 16:05:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2020-04-18 16:05:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 688. [2020-04-18 16:05:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-04-18 16:05:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1243 transitions. [2020-04-18 16:05:59,485 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1243 transitions. Word has length 118 [2020-04-18 16:05:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:05:59,485 INFO L479 AbstractCegarLoop]: Abstraction has 688 states and 1243 transitions. [2020-04-18 16:05:59,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 16:05:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1243 transitions. [2020-04-18 16:05:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-04-18 16:05:59,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:05:59,486 INFO L425 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:05:59,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:05:59,690 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:05:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1835946127, now seen corresponding path program 37 times [2020-04-18 16:05:59,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:05:59,691 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [669396527] [2020-04-18 16:05:59,693 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:05:59,696 INFO L259 McrAutomatonBuilder]: Finished intersection with 124 states and 123 transitions. [2020-04-18 16:05:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states. [2020-04-18 16:05:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-04-18 16:05:59,697 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:05:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:05:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1835946127, now seen corresponding path program 38 times [2020-04-18 16:05:59,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:05:59,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164502670] [2020-04-18 16:05:59,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:05:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:00,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164502670] [2020-04-18 16:06:00,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268333205] [2020-04-18 16:06:00,290 INFO L92 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 [2020-04-18 16:06:00,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:06:00,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:00,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2020-04-18 16:06:00,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:00,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:00,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-04-18 16:06:00,439 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:00,463 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:00,524 INFO L259 McrAutomatonBuilder]: Finished intersection with 124 states and 123 transitions. [2020-04-18 16:06:00,524 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:01,313 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 16:06:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 16:06:01,314 INFO L87 Difference]: Start difference. First operand 124 states. Second operand 43 states. [2020-04-18 16:06:03,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:03,772 INFO L93 Difference]: Finished difference Result 124 states and 123 transitions. [2020-04-18 16:06:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 123 transitions. [2020-04-18 16:06:03,773 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:03,774 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [669396527] [2020-04-18 16:06:03,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:03,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-04-18 16:06:03,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [669396527] [2020-04-18 16:06:03,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-18 16:06:03,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:03,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 16:06:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2020-04-18 16:06:03,775 INFO L87 Difference]: Start difference. First operand 688 states and 1243 transitions. Second operand 43 states. [2020-04-18 16:06:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:04,161 INFO L93 Difference]: Finished difference Result 696 states and 1251 transitions. [2020-04-18 16:06:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-04-18 16:06:04,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 123 [2020-04-18 16:06:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:04,164 INFO L225 Difference]: With dead ends: 696 [2020-04-18 16:06:04,164 INFO L226 Difference]: Without dead ends: 696 [2020-04-18 16:06:04,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2020-04-18 16:06:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-04-18 16:06:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 693. [2020-04-18 16:06:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2020-04-18 16:06:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1248 transitions. [2020-04-18 16:06:04,175 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1248 transitions. Word has length 123 [2020-04-18 16:06:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:04,175 INFO L479 AbstractCegarLoop]: Abstraction has 693 states and 1248 transitions. [2020-04-18 16:06:04,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-18 16:06:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1248 transitions. [2020-04-18 16:06:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-04-18 16:06:04,176 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:04,176 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:04,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:04,380 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:04,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2045129390, now seen corresponding path program 39 times [2020-04-18 16:06:04,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:04,381 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [846488051] [2020-04-18 16:06:04,383 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:04,386 INFO L259 McrAutomatonBuilder]: Finished intersection with 129 states and 128 transitions. [2020-04-18 16:06:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states. [2020-04-18 16:06:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-04-18 16:06:04,387 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2045129390, now seen corresponding path program 40 times [2020-04-18 16:06:04,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:04,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655581906] [2020-04-18 16:06:04,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:05,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655581906] [2020-04-18 16:06:05,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249935418] [2020-04-18 16:06:05,023 INFO L92 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 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 [2020-04-18 16:06:05,098 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:06:05,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:05,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 42 conjunts are in the unsatisfiable core [2020-04-18 16:06:05,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:05,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:05,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-04-18 16:06:05,148 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:05,165 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:05,225 INFO L259 McrAutomatonBuilder]: Finished intersection with 129 states and 128 transitions. [2020-04-18 16:06:05,225 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:06,193 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 16:06:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 16:06:06,194 INFO L87 Difference]: Start difference. First operand 129 states. Second operand 45 states. [2020-04-18 16:06:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:08,903 INFO L93 Difference]: Finished difference Result 129 states and 128 transitions. [2020-04-18 16:06:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 128 transitions. [2020-04-18 16:06:08,904 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:08,904 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [846488051] [2020-04-18 16:06:08,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:08,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-04-18 16:06:08,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [846488051] [2020-04-18 16:06:08,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 16:06:08,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:08,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 16:06:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2251, Invalid=4889, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 16:06:08,907 INFO L87 Difference]: Start difference. First operand 693 states and 1248 transitions. Second operand 45 states. [2020-04-18 16:06:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:09,300 INFO L93 Difference]: Finished difference Result 701 states and 1256 transitions. [2020-04-18 16:06:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-04-18 16:06:09,300 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 128 [2020-04-18 16:06:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:09,303 INFO L225 Difference]: With dead ends: 701 [2020-04-18 16:06:09,303 INFO L226 Difference]: Without dead ends: 701 [2020-04-18 16:06:09,303 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2251, Invalid=4889, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 16:06:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-04-18 16:06:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 698. [2020-04-18 16:06:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2020-04-18 16:06:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1253 transitions. [2020-04-18 16:06:09,311 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1253 transitions. Word has length 128 [2020-04-18 16:06:09,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:09,312 INFO L479 AbstractCegarLoop]: Abstraction has 698 states and 1253 transitions. [2020-04-18 16:06:09,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 16:06:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1253 transitions. [2020-04-18 16:06:09,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-04-18 16:06:09,313 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:09,313 INFO L425 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:09,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:09,514 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash 100455023, now seen corresponding path program 41 times [2020-04-18 16:06:09,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:09,515 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1439295040] [2020-04-18 16:06:09,517 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:09,520 INFO L259 McrAutomatonBuilder]: Finished intersection with 134 states and 133 transitions. [2020-04-18 16:06:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2020-04-18 16:06:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-04-18 16:06:09,522 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 100455023, now seen corresponding path program 42 times [2020-04-18 16:06:09,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:09,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527355701] [2020-04-18 16:06:09,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:10,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527355701] [2020-04-18 16:06:10,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602114801] [2020-04-18 16:06:10,252 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:12,443 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-04-18 16:06:12,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:12,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 44 conjunts are in the unsatisfiable core [2020-04-18 16:06:12,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:12,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:12,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 47 [2020-04-18 16:06:12,508 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:12,526 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:12,602 INFO L259 McrAutomatonBuilder]: Finished intersection with 134 states and 133 transitions. [2020-04-18 16:06:12,602 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:13,171 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-04-18 16:06:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 16:06:13,172 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 47 states. [2020-04-18 16:06:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:16,105 INFO L93 Difference]: Finished difference Result 134 states and 133 transitions. [2020-04-18 16:06:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 133 transitions. [2020-04-18 16:06:16,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:16,106 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1439295040] [2020-04-18 16:06:16,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:16,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-04-18 16:06:16,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1439295040] [2020-04-18 16:06:16,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-04-18 16:06:16,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:16,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-04-18 16:06:16,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2468, Invalid=5364, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 16:06:16,109 INFO L87 Difference]: Start difference. First operand 698 states and 1253 transitions. Second operand 47 states. [2020-04-18 16:06:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:16,591 INFO L93 Difference]: Finished difference Result 706 states and 1261 transitions. [2020-04-18 16:06:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-04-18 16:06:16,592 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 133 [2020-04-18 16:06:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:16,597 INFO L225 Difference]: With dead ends: 706 [2020-04-18 16:06:16,597 INFO L226 Difference]: Without dead ends: 706 [2020-04-18 16:06:16,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2468, Invalid=5364, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 16:06:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-04-18 16:06:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 703. [2020-04-18 16:06:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-04-18 16:06:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1258 transitions. [2020-04-18 16:06:16,613 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1258 transitions. Word has length 133 [2020-04-18 16:06:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:16,614 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 1258 transitions. [2020-04-18 16:06:16,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-04-18 16:06:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1258 transitions. [2020-04-18 16:06:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-04-18 16:06:16,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:16,616 INFO L425 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:16,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:16,832 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:16,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:16,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1246660750, now seen corresponding path program 43 times [2020-04-18 16:06:16,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:16,834 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1039625836] [2020-04-18 16:06:16,835 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:16,845 INFO L259 McrAutomatonBuilder]: Finished intersection with 139 states and 138 transitions. [2020-04-18 16:06:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states. [2020-04-18 16:06:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-04-18 16:06:16,847 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1246660750, now seen corresponding path program 44 times [2020-04-18 16:06:16,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:16,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651796287] [2020-04-18 16:06:16,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:17,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651796287] [2020-04-18 16:06:17,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272481774] [2020-04-18 16:06:17,890 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-04-18 16:06:17,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:06:17,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:17,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2020-04-18 16:06:17,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:18,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:18,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2020-04-18 16:06:18,012 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:18,034 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:18,109 INFO L259 McrAutomatonBuilder]: Finished intersection with 139 states and 138 transitions. [2020-04-18 16:06:18,110 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:18,733 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:18,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 16:06:18,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 16:06:18,734 INFO L87 Difference]: Start difference. First operand 139 states. Second operand 49 states. [2020-04-18 16:06:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:21,923 INFO L93 Difference]: Finished difference Result 139 states and 138 transitions. [2020-04-18 16:06:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 138 transitions. [2020-04-18 16:06:21,924 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:21,925 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1039625836] [2020-04-18 16:06:21,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:21,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-04-18 16:06:21,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1039625836] [2020-04-18 16:06:21,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 16:06:21,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:21,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 16:06:21,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2695, Invalid=5861, Unknown=0, NotChecked=0, Total=8556 [2020-04-18 16:06:21,927 INFO L87 Difference]: Start difference. First operand 703 states and 1258 transitions. Second operand 49 states. [2020-04-18 16:06:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:22,340 INFO L93 Difference]: Finished difference Result 711 states and 1266 transitions. [2020-04-18 16:06:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-04-18 16:06:22,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 138 [2020-04-18 16:06:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:22,343 INFO L225 Difference]: With dead ends: 711 [2020-04-18 16:06:22,343 INFO L226 Difference]: Without dead ends: 711 [2020-04-18 16:06:22,344 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2695, Invalid=5861, Unknown=0, NotChecked=0, Total=8556 [2020-04-18 16:06:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-04-18 16:06:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 708. [2020-04-18 16:06:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-04-18 16:06:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1263 transitions. [2020-04-18 16:06:22,351 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1263 transitions. Word has length 138 [2020-04-18 16:06:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:22,351 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 1263 transitions. [2020-04-18 16:06:22,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 16:06:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1263 transitions. [2020-04-18 16:06:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-04-18 16:06:22,352 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:22,352 INFO L425 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:22,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:22,553 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1262124111, now seen corresponding path program 45 times [2020-04-18 16:06:22,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:22,555 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [99886797] [2020-04-18 16:06:22,556 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:22,560 INFO L259 McrAutomatonBuilder]: Finished intersection with 144 states and 143 transitions. [2020-04-18 16:06:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-04-18 16:06:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-04-18 16:06:22,561 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1262124111, now seen corresponding path program 46 times [2020-04-18 16:06:22,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:22,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563174681] [2020-04-18 16:06:22,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:23,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563174681] [2020-04-18 16:06:23,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556021078] [2020-04-18 16:06:23,614 INFO L92 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 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 [2020-04-18 16:06:23,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:06:23,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:23,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2020-04-18 16:06:23,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:23,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:23,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2020-04-18 16:06:23,778 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:23,799 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:23,888 INFO L259 McrAutomatonBuilder]: Finished intersection with 144 states and 143 transitions. [2020-04-18 16:06:23,888 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:24,557 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 16:06:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 16:06:24,558 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 51 states. [2020-04-18 16:06:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:28,013 INFO L93 Difference]: Finished difference Result 144 states and 143 transitions. [2020-04-18 16:06:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 143 transitions. [2020-04-18 16:06:28,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:28,014 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [99886797] [2020-04-18 16:06:28,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:28,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-04-18 16:06:28,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [99886797] [2020-04-18 16:06:28,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-04-18 16:06:28,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 16:06:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2932, Invalid=6380, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 16:06:28,016 INFO L87 Difference]: Start difference. First operand 708 states and 1263 transitions. Second operand 51 states. [2020-04-18 16:06:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:28,444 INFO L93 Difference]: Finished difference Result 716 states and 1271 transitions. [2020-04-18 16:06:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-04-18 16:06:28,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 143 [2020-04-18 16:06:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:28,447 INFO L225 Difference]: With dead ends: 716 [2020-04-18 16:06:28,447 INFO L226 Difference]: Without dead ends: 716 [2020-04-18 16:06:28,448 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2932, Invalid=6380, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 16:06:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-04-18 16:06:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 713. [2020-04-18 16:06:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-04-18 16:06:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1268 transitions. [2020-04-18 16:06:28,454 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1268 transitions. Word has length 143 [2020-04-18 16:06:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:28,455 INFO L479 AbstractCegarLoop]: Abstraction has 713 states and 1268 transitions. [2020-04-18 16:06:28,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-04-18 16:06:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1268 transitions. [2020-04-18 16:06:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-04-18 16:06:28,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:28,457 INFO L425 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:28,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:28,661 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 265484690, now seen corresponding path program 47 times [2020-04-18 16:06:28,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:28,662 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [205286510] [2020-04-18 16:06:28,664 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:28,668 INFO L259 McrAutomatonBuilder]: Finished intersection with 149 states and 148 transitions. [2020-04-18 16:06:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states. [2020-04-18 16:06:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-04-18 16:06:28,669 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 265484690, now seen corresponding path program 48 times [2020-04-18 16:06:28,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:28,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858004533] [2020-04-18 16:06:28,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858004533] [2020-04-18 16:06:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211088280] [2020-04-18 16:06:29,537 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-04-18 16:06:31,491 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-04-18 16:06:31,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:31,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 50 conjunts are in the unsatisfiable core [2020-04-18 16:06:31,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:31,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:31,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 53 [2020-04-18 16:06:31,563 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:31,585 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:31,748 INFO L259 McrAutomatonBuilder]: Finished intersection with 149 states and 148 transitions. [2020-04-18 16:06:31,748 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:32,482 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:32,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-04-18 16:06:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 16:06:32,484 INFO L87 Difference]: Start difference. First operand 149 states. Second operand 53 states. [2020-04-18 16:06:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:36,251 INFO L93 Difference]: Finished difference Result 149 states and 148 transitions. [2020-04-18 16:06:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 148 transitions. [2020-04-18 16:06:36,252 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:36,252 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [205286510] [2020-04-18 16:06:36,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:36,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-04-18 16:06:36,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [205286510] [2020-04-18 16:06:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-04-18 16:06:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-04-18 16:06:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3179, Invalid=6921, Unknown=0, NotChecked=0, Total=10100 [2020-04-18 16:06:36,255 INFO L87 Difference]: Start difference. First operand 713 states and 1268 transitions. Second operand 53 states. [2020-04-18 16:06:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:36,720 INFO L93 Difference]: Finished difference Result 721 states and 1276 transitions. [2020-04-18 16:06:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-04-18 16:06:36,720 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 148 [2020-04-18 16:06:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:36,723 INFO L225 Difference]: With dead ends: 721 [2020-04-18 16:06:36,723 INFO L226 Difference]: Without dead ends: 721 [2020-04-18 16:06:36,724 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3179, Invalid=6921, Unknown=0, NotChecked=0, Total=10100 [2020-04-18 16:06:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2020-04-18 16:06:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 718. [2020-04-18 16:06:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 718 states. [2020-04-18 16:06:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1273 transitions. [2020-04-18 16:06:36,731 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1273 transitions. Word has length 148 [2020-04-18 16:06:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:36,732 INFO L479 AbstractCegarLoop]: Abstraction has 718 states and 1273 transitions. [2020-04-18 16:06:36,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-04-18 16:06:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1273 transitions. [2020-04-18 16:06:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-04-18 16:06:36,733 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:36,733 INFO L425 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:36,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:36,936 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash 710233647, now seen corresponding path program 49 times [2020-04-18 16:06:36,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:36,937 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1591346419] [2020-04-18 16:06:36,939 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:36,944 INFO L259 McrAutomatonBuilder]: Finished intersection with 154 states and 153 transitions. [2020-04-18 16:06:36,945 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-04-18 16:06:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-04-18 16:06:36,946 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash 710233647, now seen corresponding path program 50 times [2020-04-18 16:06:36,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:36,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729751435] [2020-04-18 16:06:36,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:38,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729751435] [2020-04-18 16:06:38,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396599202] [2020-04-18 16:06:38,109 INFO L92 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 [2020-04-18 16:06:38,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:06:38,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:38,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2020-04-18 16:06:38,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1529 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:38,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:38,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2020-04-18 16:06:38,285 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:38,318 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:38,599 INFO L259 McrAutomatonBuilder]: Finished intersection with 154 states and 153 transitions. [2020-04-18 16:06:38,599 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:39,881 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:39,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-18 16:06:39,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 16:06:39,881 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 55 states. [2020-04-18 16:06:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:44,048 INFO L93 Difference]: Finished difference Result 154 states and 153 transitions. [2020-04-18 16:06:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 153 transitions. [2020-04-18 16:06:44,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:44,049 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1591346419] [2020-04-18 16:06:44,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:44,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-04-18 16:06:44,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1591346419] [2020-04-18 16:06:44,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-04-18 16:06:44,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:44,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-18 16:06:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3436, Invalid=7484, Unknown=0, NotChecked=0, Total=10920 [2020-04-18 16:06:44,051 INFO L87 Difference]: Start difference. First operand 718 states and 1273 transitions. Second operand 55 states. [2020-04-18 16:06:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:44,391 INFO L93 Difference]: Finished difference Result 726 states and 1281 transitions. [2020-04-18 16:06:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-04-18 16:06:44,392 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 153 [2020-04-18 16:06:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:44,394 INFO L225 Difference]: With dead ends: 726 [2020-04-18 16:06:44,394 INFO L226 Difference]: Without dead ends: 726 [2020-04-18 16:06:44,395 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3436, Invalid=7484, Unknown=0, NotChecked=0, Total=10920 [2020-04-18 16:06:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-04-18 16:06:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 723. [2020-04-18 16:06:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2020-04-18 16:06:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1278 transitions. [2020-04-18 16:06:44,403 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1278 transitions. Word has length 153 [2020-04-18 16:06:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:44,403 INFO L479 AbstractCegarLoop]: Abstraction has 723 states and 1278 transitions. [2020-04-18 16:06:44,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-04-18 16:06:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1278 transitions. [2020-04-18 16:06:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-04-18 16:06:44,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:44,404 INFO L425 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:44,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:44,605 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998414, now seen corresponding path program 51 times [2020-04-18 16:06:44,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:44,606 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [780805918] [2020-04-18 16:06:44,607 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:44,612 INFO L259 McrAutomatonBuilder]: Finished intersection with 159 states and 158 transitions. [2020-04-18 16:06:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2020-04-18 16:06:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-04-18 16:06:44,613 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:44,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998414, now seen corresponding path program 52 times [2020-04-18 16:06:44,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:44,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465889987] [2020-04-18 16:06:44,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:45,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465889987] [2020-04-18 16:06:45,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27600861] [2020-04-18 16:06:45,706 INFO L92 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 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 [2020-04-18 16:06:45,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:06:45,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:06:45,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2020-04-18 16:06:45,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:06:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:45,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:06:45,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2020-04-18 16:06:45,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:06:45,930 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:46,032 INFO L259 McrAutomatonBuilder]: Finished intersection with 159 states and 158 transitions. [2020-04-18 16:06:46,032 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:06:46,875 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:06:46,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 16:06:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 16:06:46,876 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 57 states. [2020-04-18 16:06:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:51,204 INFO L93 Difference]: Finished difference Result 159 states and 158 transitions. [2020-04-18 16:06:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 158 transitions. [2020-04-18 16:06:51,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:06:51,205 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [780805918] [2020-04-18 16:06:51,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:06:51,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-04-18 16:06:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [780805918] [2020-04-18 16:06:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-04-18 16:06:51,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:06:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 16:06:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3703, Invalid=8069, Unknown=0, NotChecked=0, Total=11772 [2020-04-18 16:06:51,207 INFO L87 Difference]: Start difference. First operand 723 states and 1278 transitions. Second operand 57 states. [2020-04-18 16:06:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:06:51,674 INFO L93 Difference]: Finished difference Result 731 states and 1286 transitions. [2020-04-18 16:06:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-04-18 16:06:51,674 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 158 [2020-04-18 16:06:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:06:51,677 INFO L225 Difference]: With dead ends: 731 [2020-04-18 16:06:51,677 INFO L226 Difference]: Without dead ends: 731 [2020-04-18 16:06:51,678 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3703, Invalid=8069, Unknown=0, NotChecked=0, Total=11772 [2020-04-18 16:06:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-04-18 16:06:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 728. [2020-04-18 16:06:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2020-04-18 16:06:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1283 transitions. [2020-04-18 16:06:51,685 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1283 transitions. Word has length 158 [2020-04-18 16:06:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:06:51,685 INFO L479 AbstractCegarLoop]: Abstraction has 728 states and 1283 transitions. [2020-04-18 16:06:51,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-04-18 16:06:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1283 transitions. [2020-04-18 16:06:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-04-18 16:06:51,686 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:06:51,687 INFO L425 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:06:51,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:06:51,890 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:06:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1861961743, now seen corresponding path program 53 times [2020-04-18 16:06:51,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:06:51,891 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [359715262] [2020-04-18 16:06:51,892 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:06:51,897 INFO L259 McrAutomatonBuilder]: Finished intersection with 164 states and 163 transitions. [2020-04-18 16:06:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2020-04-18 16:06:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-04-18 16:06:51,899 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:06:51,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:06:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1861961743, now seen corresponding path program 54 times [2020-04-18 16:06:51,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:06:51,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923101660] [2020-04-18 16:06:51,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:06:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:06:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:06:52,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923101660] [2020-04-18 16:06:52,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716316295] [2020-04-18 16:06:52,936 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:03,102 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-04-18 16:07:03,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:03,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjunts are in the unsatisfiable core [2020-04-18 16:07:03,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:03,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:03,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 59 [2020-04-18 16:07:03,191 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:03,217 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:03,331 INFO L259 McrAutomatonBuilder]: Finished intersection with 164 states and 163 transitions. [2020-04-18 16:07:03,331 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:07:04,254 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:07:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-04-18 16:07:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=2523, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 16:07:04,255 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 59 states. [2020-04-18 16:07:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:08,882 INFO L93 Difference]: Finished difference Result 164 states and 163 transitions. [2020-04-18 16:07:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 163 transitions. [2020-04-18 16:07:08,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:07:08,883 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [359715262] [2020-04-18 16:07:08,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:07:08,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-04-18 16:07:08,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [359715262] [2020-04-18 16:07:08,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-04-18 16:07:08,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:07:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-04-18 16:07:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3980, Invalid=8676, Unknown=0, NotChecked=0, Total=12656 [2020-04-18 16:07:08,885 INFO L87 Difference]: Start difference. First operand 728 states and 1283 transitions. Second operand 59 states. [2020-04-18 16:07:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:09,384 INFO L93 Difference]: Finished difference Result 736 states and 1291 transitions. [2020-04-18 16:07:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-04-18 16:07:09,384 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 163 [2020-04-18 16:07:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:07:09,386 INFO L225 Difference]: With dead ends: 736 [2020-04-18 16:07:09,387 INFO L226 Difference]: Without dead ends: 736 [2020-04-18 16:07:09,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3980, Invalid=8676, Unknown=0, NotChecked=0, Total=12656 [2020-04-18 16:07:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-04-18 16:07:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 733. [2020-04-18 16:07:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-04-18 16:07:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1288 transitions. [2020-04-18 16:07:09,397 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1288 transitions. Word has length 163 [2020-04-18 16:07:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:07:09,398 INFO L479 AbstractCegarLoop]: Abstraction has 733 states and 1288 transitions. [2020-04-18 16:07:09,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-04-18 16:07:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1288 transitions. [2020-04-18 16:07:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-04-18 16:07:09,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:07:09,398 INFO L425 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:07:09,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:09,599 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:07:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:09,600 INFO L82 PathProgramCache]: Analyzing trace with hash -210008622, now seen corresponding path program 55 times [2020-04-18 16:07:09,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:07:09,601 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2096251594] [2020-04-18 16:07:09,602 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:09,607 INFO L259 McrAutomatonBuilder]: Finished intersection with 169 states and 168 transitions. [2020-04-18 16:07:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-04-18 16:07:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-04-18 16:07:09,609 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:07:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -210008622, now seen corresponding path program 56 times [2020-04-18 16:07:09,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:07:09,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960045630] [2020-04-18 16:07:09,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:07:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:07:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:10,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960045630] [2020-04-18 16:07:10,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648008242] [2020-04-18 16:07:10,696 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-04-18 16:07:10,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:07:10,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:10,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2020-04-18 16:07:10,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:10,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:10,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2020-04-18 16:07:10,835 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:10,863 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:10,986 INFO L259 McrAutomatonBuilder]: Finished intersection with 169 states and 168 transitions. [2020-04-18 16:07:10,986 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:07:11,968 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:07:11,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-04-18 16:07:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 16:07:11,970 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 61 states. [2020-04-18 16:07:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:16,937 INFO L93 Difference]: Finished difference Result 169 states and 168 transitions. [2020-04-18 16:07:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 168 transitions. [2020-04-18 16:07:16,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:07:16,939 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2096251594] [2020-04-18 16:07:16,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:07:16,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-04-18 16:07:16,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2096251594] [2020-04-18 16:07:16,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-04-18 16:07:16,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:07:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-04-18 16:07:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4267, Invalid=9305, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 16:07:16,941 INFO L87 Difference]: Start difference. First operand 733 states and 1288 transitions. Second operand 61 states. [2020-04-18 16:07:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:17,336 INFO L93 Difference]: Finished difference Result 741 states and 1296 transitions. [2020-04-18 16:07:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-04-18 16:07:17,337 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 168 [2020-04-18 16:07:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:07:17,339 INFO L225 Difference]: With dead ends: 741 [2020-04-18 16:07:17,339 INFO L226 Difference]: Without dead ends: 741 [2020-04-18 16:07:17,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4267, Invalid=9305, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 16:07:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-04-18 16:07:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 738. [2020-04-18 16:07:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-04-18 16:07:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1293 transitions. [2020-04-18 16:07:17,348 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1293 transitions. Word has length 168 [2020-04-18 16:07:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:07:17,348 INFO L479 AbstractCegarLoop]: Abstraction has 738 states and 1293 transitions. [2020-04-18 16:07:17,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-04-18 16:07:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1293 transitions. [2020-04-18 16:07:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-04-18 16:07:17,349 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:07:17,349 INFO L425 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:07:17,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:17,550 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:07:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1554355729, now seen corresponding path program 57 times [2020-04-18 16:07:17,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:07:17,552 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1195047535] [2020-04-18 16:07:17,554 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:17,560 INFO L259 McrAutomatonBuilder]: Finished intersection with 174 states and 173 transitions. [2020-04-18 16:07:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2020-04-18 16:07:17,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-04-18 16:07:17,562 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:07:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:17,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1554355729, now seen corresponding path program 58 times [2020-04-18 16:07:17,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:07:17,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463171827] [2020-04-18 16:07:17,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:07:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:07:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:18,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463171827] [2020-04-18 16:07:18,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802706722] [2020-04-18 16:07:18,693 INFO L92 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 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 [2020-04-18 16:07:18,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:07:18,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:18,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 60 conjunts are in the unsatisfiable core [2020-04-18 16:07:18,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2063 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:18,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:18,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2020-04-18 16:07:18,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:18,884 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:19,038 INFO L259 McrAutomatonBuilder]: Finished intersection with 174 states and 173 transitions. [2020-04-18 16:07:19,039 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:07:20,209 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:07:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 16:07:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2020-04-18 16:07:20,210 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 63 states. [2020-04-18 16:07:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:25,594 INFO L93 Difference]: Finished difference Result 174 states and 173 transitions. [2020-04-18 16:07:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 173 transitions. [2020-04-18 16:07:25,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:07:25,595 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1195047535] [2020-04-18 16:07:25,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:07:25,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-04-18 16:07:25,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1195047535] [2020-04-18 16:07:25,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-04-18 16:07:25,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:07:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 16:07:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=9956, Unknown=0, NotChecked=0, Total=14520 [2020-04-18 16:07:25,598 INFO L87 Difference]: Start difference. First operand 738 states and 1293 transitions. Second operand 63 states. [2020-04-18 16:07:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:26,143 INFO L93 Difference]: Finished difference Result 746 states and 1301 transitions. [2020-04-18 16:07:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-04-18 16:07:26,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 173 [2020-04-18 16:07:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:07:26,147 INFO L225 Difference]: With dead ends: 746 [2020-04-18 16:07:26,147 INFO L226 Difference]: Without dead ends: 746 [2020-04-18 16:07:26,148 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4564, Invalid=9956, Unknown=0, NotChecked=0, Total=14520 [2020-04-18 16:07:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-04-18 16:07:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 743. [2020-04-18 16:07:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-04-18 16:07:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1298 transitions. [2020-04-18 16:07:26,160 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1298 transitions. Word has length 173 [2020-04-18 16:07:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:07:26,160 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1298 transitions. [2020-04-18 16:07:26,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-04-18 16:07:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1298 transitions. [2020-04-18 16:07:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-04-18 16:07:26,161 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:07:26,162 INFO L425 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:07:26,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:26,365 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:07:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:26,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1889964018, now seen corresponding path program 59 times [2020-04-18 16:07:26,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:07:26,367 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [938403383] [2020-04-18 16:07:26,368 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:26,374 INFO L259 McrAutomatonBuilder]: Finished intersection with 179 states and 178 transitions. [2020-04-18 16:07:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-04-18 16:07:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-04-18 16:07:26,375 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:07:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1889964018, now seen corresponding path program 60 times [2020-04-18 16:07:26,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:07:26,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941187575] [2020-04-18 16:07:26,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:07:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:07:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:27,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941187575] [2020-04-18 16:07:27,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971697831] [2020-04-18 16:07:27,822 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:37,942 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-04-18 16:07:37,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:37,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 62 conjunts are in the unsatisfiable core [2020-04-18 16:07:37,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:38,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:38,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 65 [2020-04-18 16:07:38,013 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:38,045 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:38,717 INFO L259 McrAutomatonBuilder]: Finished intersection with 179 states and 178 transitions. [2020-04-18 16:07:38,717 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:07:39,939 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:07:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-04-18 16:07:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3072, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 16:07:39,941 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 65 states. [2020-04-18 16:07:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:45,695 INFO L93 Difference]: Finished difference Result 179 states and 178 transitions. [2020-04-18 16:07:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 178 transitions. [2020-04-18 16:07:45,696 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:07:45,697 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [938403383] [2020-04-18 16:07:45,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:07:45,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-04-18 16:07:45,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [938403383] [2020-04-18 16:07:45,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-04-18 16:07:45,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:07:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-04-18 16:07:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4871, Invalid=10629, Unknown=0, NotChecked=0, Total=15500 [2020-04-18 16:07:45,699 INFO L87 Difference]: Start difference. First operand 743 states and 1298 transitions. Second operand 65 states. [2020-04-18 16:07:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:46,261 INFO L93 Difference]: Finished difference Result 751 states and 1306 transitions. [2020-04-18 16:07:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-04-18 16:07:46,261 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 178 [2020-04-18 16:07:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:07:46,275 INFO L225 Difference]: With dead ends: 751 [2020-04-18 16:07:46,275 INFO L226 Difference]: Without dead ends: 751 [2020-04-18 16:07:46,277 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4871, Invalid=10629, Unknown=0, NotChecked=0, Total=15500 [2020-04-18 16:07:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-04-18 16:07:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 748. [2020-04-18 16:07:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-04-18 16:07:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1303 transitions. [2020-04-18 16:07:46,286 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1303 transitions. Word has length 178 [2020-04-18 16:07:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:07:46,286 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 1303 transitions. [2020-04-18 16:07:46,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-04-18 16:07:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1303 transitions. [2020-04-18 16:07:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-04-18 16:07:46,287 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:07:46,287 INFO L425 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:07:46,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:46,488 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:07:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash -266292273, now seen corresponding path program 61 times [2020-04-18 16:07:46,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:07:46,489 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [266675094] [2020-04-18 16:07:46,491 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:46,497 INFO L259 McrAutomatonBuilder]: Finished intersection with 184 states and 183 transitions. [2020-04-18 16:07:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states. [2020-04-18 16:07:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-04-18 16:07:46,499 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:07:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:46,499 INFO L82 PathProgramCache]: Analyzing trace with hash -266292273, now seen corresponding path program 62 times [2020-04-18 16:07:46,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:07:46,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222007787] [2020-04-18 16:07:46,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:07:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:07:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:47,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222007787] [2020-04-18 16:07:47,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016970593] [2020-04-18 16:07:47,951 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:48,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:07:48,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:48,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 64 conjunts are in the unsatisfiable core [2020-04-18 16:07:48,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2360 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:48,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:48,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2020-04-18 16:07:48,101 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:48,150 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:48,306 INFO L259 McrAutomatonBuilder]: Finished intersection with 184 states and 183 transitions. [2020-04-18 16:07:48,306 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:07:49,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:07:49,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-04-18 16:07:49,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 16:07:49,590 INFO L87 Difference]: Start difference. First operand 184 states. Second operand 67 states. [2020-04-18 16:07:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:55,878 INFO L93 Difference]: Finished difference Result 184 states and 183 transitions. [2020-04-18 16:07:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 183 transitions. [2020-04-18 16:07:55,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:07:55,879 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [266675094] [2020-04-18 16:07:55,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:07:55,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-04-18 16:07:55,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [266675094] [2020-04-18 16:07:55,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-04-18 16:07:55,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:07:55,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-04-18 16:07:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5188, Invalid=11324, Unknown=0, NotChecked=0, Total=16512 [2020-04-18 16:07:55,882 INFO L87 Difference]: Start difference. First operand 748 states and 1303 transitions. Second operand 67 states. [2020-04-18 16:07:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:07:56,275 INFO L93 Difference]: Finished difference Result 756 states and 1311 transitions. [2020-04-18 16:07:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-04-18 16:07:56,275 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 183 [2020-04-18 16:07:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:07:56,277 INFO L225 Difference]: With dead ends: 756 [2020-04-18 16:07:56,277 INFO L226 Difference]: Without dead ends: 756 [2020-04-18 16:07:56,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5188, Invalid=11324, Unknown=0, NotChecked=0, Total=16512 [2020-04-18 16:07:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-04-18 16:07:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 753. [2020-04-18 16:07:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2020-04-18 16:07:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1308 transitions. [2020-04-18 16:07:56,290 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1308 transitions. Word has length 183 [2020-04-18 16:07:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:07:56,291 INFO L479 AbstractCegarLoop]: Abstraction has 753 states and 1308 transitions. [2020-04-18 16:07:56,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-04-18 16:07:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1308 transitions. [2020-04-18 16:07:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-04-18 16:07:56,292 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:07:56,292 INFO L425 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:07:56,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:56,493 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:07:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1067676178, now seen corresponding path program 63 times [2020-04-18 16:07:56,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:07:56,494 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1182862223] [2020-04-18 16:07:56,496 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:56,503 INFO L259 McrAutomatonBuilder]: Finished intersection with 189 states and 188 transitions. [2020-04-18 16:07:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states. [2020-04-18 16:07:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-04-18 16:07:56,505 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:07:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:07:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1067676178, now seen corresponding path program 64 times [2020-04-18 16:07:56,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:07:56,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659721069] [2020-04-18 16:07:56,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:07:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:07:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:57,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659721069] [2020-04-18 16:07:57,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333321164] [2020-04-18 16:07:57,983 INFO L92 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:07:58,058 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:07:58,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:07:58,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2020-04-18 16:07:58,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:07:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:07:58,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:07:58,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 69 [2020-04-18 16:07:58,142 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:07:58,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:07:58,343 INFO L259 McrAutomatonBuilder]: Finished intersection with 189 states and 188 transitions. [2020-04-18 16:07:58,343 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:08:00,367 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:08:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-04-18 16:08:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3468, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 16:08:00,368 INFO L87 Difference]: Start difference. First operand 189 states. Second operand 69 states. [2020-04-18 16:08:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:08:06,932 INFO L93 Difference]: Finished difference Result 189 states and 188 transitions. [2020-04-18 16:08:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 188 transitions. [2020-04-18 16:08:06,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:08:06,934 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1182862223] [2020-04-18 16:08:06,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:08:06,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-04-18 16:08:06,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1182862223] [2020-04-18 16:08:06,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-04-18 16:08:06,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:08:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-04-18 16:08:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5515, Invalid=12041, Unknown=0, NotChecked=0, Total=17556 [2020-04-18 16:08:06,935 INFO L87 Difference]: Start difference. First operand 753 states and 1308 transitions. Second operand 69 states. [2020-04-18 16:08:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:08:07,521 INFO L93 Difference]: Finished difference Result 761 states and 1316 transitions. [2020-04-18 16:08:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-04-18 16:08:07,522 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 188 [2020-04-18 16:08:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:08:07,523 INFO L225 Difference]: With dead ends: 761 [2020-04-18 16:08:07,523 INFO L226 Difference]: Without dead ends: 761 [2020-04-18 16:08:07,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5515, Invalid=12041, Unknown=0, NotChecked=0, Total=17556 [2020-04-18 16:08:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2020-04-18 16:08:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 758. [2020-04-18 16:08:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 758 states. [2020-04-18 16:08:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1313 transitions. [2020-04-18 16:08:07,533 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1313 transitions. Word has length 188 [2020-04-18 16:08:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:08:07,533 INFO L479 AbstractCegarLoop]: Abstraction has 758 states and 1313 transitions. [2020-04-18 16:08:07,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-04-18 16:08:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1313 transitions. [2020-04-18 16:08:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-04-18 16:08:07,534 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:08:07,535 INFO L425 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:08:07,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:08:07,739 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:08:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:08:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash -58972753, now seen corresponding path program 65 times [2020-04-18 16:08:07,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:08:07,740 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2115699874] [2020-04-18 16:08:07,741 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:08:07,748 INFO L259 McrAutomatonBuilder]: Finished intersection with 194 states and 193 transitions. [2020-04-18 16:08:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states. [2020-04-18 16:08:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-04-18 16:08:07,750 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:08:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:08:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash -58972753, now seen corresponding path program 66 times [2020-04-18 16:08:07,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:08:07,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571400880] [2020-04-18 16:08:07,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:08:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:08:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:08:09,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571400880] [2020-04-18 16:08:09,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873427069] [2020-04-18 16:08:09,528 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:08:50,106 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2020-04-18 16:08:50,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:08:50,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 68 conjunts are in the unsatisfiable core [2020-04-18 16:08:50,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:08:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2677 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:08:50,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:08:50,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 71 [2020-04-18 16:08:50,194 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:08:50,231 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:08:50,544 INFO L259 McrAutomatonBuilder]: Finished intersection with 194 states and 193 transitions. [2020-04-18 16:08:50,544 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:08:51,896 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:08:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-04-18 16:08:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2020-04-18 16:08:51,898 INFO L87 Difference]: Start difference. First operand 194 states. Second operand 71 states. [2020-04-18 16:08:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:08:58,750 INFO L93 Difference]: Finished difference Result 194 states and 193 transitions. [2020-04-18 16:08:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 193 transitions. [2020-04-18 16:08:58,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:08:58,751 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2115699874] [2020-04-18 16:08:58,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:08:58,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-04-18 16:08:58,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2115699874] [2020-04-18 16:08:58,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-04-18 16:08:58,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:08:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-04-18 16:08:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=12780, Unknown=0, NotChecked=0, Total=18632 [2020-04-18 16:08:58,753 INFO L87 Difference]: Start difference. First operand 758 states and 1313 transitions. Second operand 71 states. [2020-04-18 16:08:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:08:59,354 INFO L93 Difference]: Finished difference Result 766 states and 1321 transitions. [2020-04-18 16:08:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-04-18 16:08:59,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 193 [2020-04-18 16:08:59,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:08:59,356 INFO L225 Difference]: With dead ends: 766 [2020-04-18 16:08:59,356 INFO L226 Difference]: Without dead ends: 766 [2020-04-18 16:08:59,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3519 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5852, Invalid=12780, Unknown=0, NotChecked=0, Total=18632 [2020-04-18 16:08:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-04-18 16:08:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 763. [2020-04-18 16:08:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 763 states. [2020-04-18 16:08:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1318 transitions. [2020-04-18 16:08:59,364 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1318 transitions. Word has length 193 [2020-04-18 16:08:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:08:59,364 INFO L479 AbstractCegarLoop]: Abstraction has 763 states and 1318 transitions. [2020-04-18 16:08:59,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-04-18 16:08:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1318 transitions. [2020-04-18 16:08:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-04-18 16:08:59,365 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:08:59,365 INFO L425 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:08:59,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:08:59,566 INFO L427 AbstractCegarLoop]: === Iteration 36 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:08:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:08:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash 100936754, now seen corresponding path program 67 times [2020-04-18 16:08:59,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:08:59,567 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1821907652] [2020-04-18 16:08:59,569 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:08:59,576 INFO L259 McrAutomatonBuilder]: Finished intersection with 199 states and 198 transitions. [2020-04-18 16:08:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states. [2020-04-18 16:08:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-04-18 16:08:59,577 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:08:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:08:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash 100936754, now seen corresponding path program 68 times [2020-04-18 16:08:59,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:08:59,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697700203] [2020-04-18 16:08:59,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:08:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:09:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:09:01,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697700203] [2020-04-18 16:09:01,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366654515] [2020-04-18 16:09:01,074 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:09:01,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 16:09:01,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:09:01,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 70 conjunts are in the unsatisfiable core [2020-04-18 16:09:01,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:09:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:09:01,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:09:01,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2020-04-18 16:09:01,236 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:09:01,277 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:09:01,483 INFO L259 McrAutomatonBuilder]: Finished intersection with 199 states and 198 transitions. [2020-04-18 16:09:01,483 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:09:02,989 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:09:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-04-18 16:09:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 16:09:02,990 INFO L87 Difference]: Start difference. First operand 199 states. Second operand 73 states. [2020-04-18 16:09:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:09:10,231 INFO L93 Difference]: Finished difference Result 199 states and 198 transitions. [2020-04-18 16:09:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 198 transitions. [2020-04-18 16:09:10,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:09:10,233 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1821907652] [2020-04-18 16:09:10,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:09:10,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-04-18 16:09:10,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1821907652] [2020-04-18 16:09:10,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-04-18 16:09:10,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:09:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-04-18 16:09:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6199, Invalid=13541, Unknown=0, NotChecked=0, Total=19740 [2020-04-18 16:09:10,235 INFO L87 Difference]: Start difference. First operand 763 states and 1318 transitions. Second operand 73 states. [2020-04-18 16:09:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:09:10,860 INFO L93 Difference]: Finished difference Result 771 states and 1326 transitions. [2020-04-18 16:09:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-04-18 16:09:10,860 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 198 [2020-04-18 16:09:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:09:10,861 INFO L225 Difference]: With dead ends: 771 [2020-04-18 16:09:10,861 INFO L226 Difference]: Without dead ends: 771 [2020-04-18 16:09:10,862 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6199, Invalid=13541, Unknown=0, NotChecked=0, Total=19740 [2020-04-18 16:09:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-04-18 16:09:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 768. [2020-04-18 16:09:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-04-18 16:09:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1323 transitions. [2020-04-18 16:09:10,870 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1323 transitions. Word has length 198 [2020-04-18 16:09:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:09:10,870 INFO L479 AbstractCegarLoop]: Abstraction has 768 states and 1323 transitions. [2020-04-18 16:09:10,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-04-18 16:09:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1323 transitions. [2020-04-18 16:09:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-04-18 16:09:10,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:09:10,871 INFO L425 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:09:11,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:09:11,072 INFO L427 AbstractCegarLoop]: === Iteration 37 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:09:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:09:11,073 INFO L82 PathProgramCache]: Analyzing trace with hash -837107825, now seen corresponding path program 69 times [2020-04-18 16:09:11,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:09:11,073 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1776026830] [2020-04-18 16:09:11,075 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:09:11,083 INFO L259 McrAutomatonBuilder]: Finished intersection with 204 states and 203 transitions. [2020-04-18 16:09:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states. [2020-04-18 16:09:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-04-18 16:09:11,085 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:09:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:09:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -837107825, now seen corresponding path program 70 times [2020-04-18 16:09:11,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:09:11,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867971474] [2020-04-18 16:09:11,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:09:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:09:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:09:13,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867971474] [2020-04-18 16:09:13,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843627491] [2020-04-18 16:09:13,009 INFO L92 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:09:13,096 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 16:09:13,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 16:09:13,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 72 conjunts are in the unsatisfiable core [2020-04-18 16:09:13,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 16:09:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:09:13,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 16:09:13,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 75 [2020-04-18 16:09:13,185 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 16:09:13,234 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:09:13,449 INFO L259 McrAutomatonBuilder]: Finished intersection with 204 states and 203 transitions. [2020-04-18 16:09:13,449 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 16:09:15,108 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 16:09:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-04-18 16:09:15,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2020-04-18 16:09:15,109 INFO L87 Difference]: Start difference. First operand 204 states. Second operand 75 states. [2020-04-18 16:09:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:09:22,806 INFO L93 Difference]: Finished difference Result 204 states and 203 transitions. [2020-04-18 16:09:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 203 transitions. [2020-04-18 16:09:22,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 16:09:22,807 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1776026830] [2020-04-18 16:09:22,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 16:09:22,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-04-18 16:09:22,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1776026830] [2020-04-18 16:09:22,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-04-18 16:09:22,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 16:09:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-04-18 16:09:22,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6556, Invalid=14324, Unknown=0, NotChecked=0, Total=20880 [2020-04-18 16:09:22,810 INFO L87 Difference]: Start difference. First operand 768 states and 1323 transitions. Second operand 75 states. [2020-04-18 16:09:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 16:09:23,342 INFO L93 Difference]: Finished difference Result 776 states and 1331 transitions. [2020-04-18 16:09:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-04-18 16:09:23,342 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 203 [2020-04-18 16:09:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 16:09:23,344 INFO L225 Difference]: With dead ends: 776 [2020-04-18 16:09:23,344 INFO L226 Difference]: Without dead ends: 776 [2020-04-18 16:09:23,345 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6556, Invalid=14324, Unknown=0, NotChecked=0, Total=20880 [2020-04-18 16:09:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-04-18 16:09:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 773. [2020-04-18 16:09:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-04-18 16:09:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1328 transitions. [2020-04-18 16:09:23,352 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1328 transitions. Word has length 203 [2020-04-18 16:09:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 16:09:23,352 INFO L479 AbstractCegarLoop]: Abstraction has 773 states and 1328 transitions. [2020-04-18 16:09:23,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-04-18 16:09:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1328 transitions. [2020-04-18 16:09:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-04-18 16:09:23,353 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 16:09:23,353 INFO L425 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 16:09:23,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 16:09:23,554 INFO L427 AbstractCegarLoop]: === Iteration 38 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 16:09:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:09:23,555 INFO L82 PathProgramCache]: Analyzing trace with hash 450543186, now seen corresponding path program 71 times [2020-04-18 16:09:23,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 16:09:23,555 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [29236298] [2020-04-18 16:09:23,558 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 16:09:23,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 209 states and 208 transitions. [2020-04-18 16:09:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states. [2020-04-18 16:09:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-04-18 16:09:23,566 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 16:09:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 16:09:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash 450543186, now seen corresponding path program 72 times [2020-04-18 16:09:23,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 16:09:23,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868001162] [2020-04-18 16:09:23,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 16:09:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 16:09:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 16:09:25,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868001162] [2020-04-18 16:09:25,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098173111] [2020-04-18 16:09:25,417 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown