/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-divine/condvar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 20:16:12,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 20:16:12,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 20:16:12,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 20:16:12,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 20:16:12,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 20:16:12,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 20:16:12,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 20:16:13,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 20:16:13,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 20:16:13,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 20:16:13,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 20:16:13,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 20:16:13,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 20:16:13,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 20:16:13,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 20:16:13,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 20:16:13,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 20:16:13,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 20:16:13,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 20:16:13,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 20:16:13,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 20:16:13,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 20:16:13,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 20:16:13,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 20:16:13,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 20:16:13,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 20:16:13,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 20:16:13,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 20:16:13,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 20:16:13,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 20:16:13,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 20:16:13,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 20:16:13,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 20:16:13,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 20:16:13,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 20:16:13,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 20:16:13,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 20:16:13,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 20:16:13,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 20:16:13,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 20:16:13,037 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 20:16:13,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 20:16:13,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 20:16:13,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 20:16:13,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 20:16:13,063 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 20:16:13,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 20:16:13,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 20:16:13,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 20:16:13,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 20:16:13,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 20:16:13,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 20:16:13,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 20:16:13,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 20:16:13,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 20:16:13,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 20:16:13,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 20:16:13,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 20:16:13,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 20:16:13,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 20:16:13,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 20:16:13,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 20:16:13,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 20:16:13,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 20:16:13,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 20:16:13,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 20:16:13,068 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 20:16:13,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 20:16:13,068 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 20:16:13,068 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 20:16:13,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 20:16:13,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 20:16:13,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 20:16:13,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 20:16:13,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 20:16:13,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 20:16:13,376 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 20:16:13,377 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 20:16:13,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e4cc341/8063dc1c6f0f48dbba3d597ac8ba372b/FLAGef4600cef [2020-04-18 20:16:14,019 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 20:16:14,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 20:16:14,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e4cc341/8063dc1c6f0f48dbba3d597ac8ba372b/FLAGef4600cef [2020-04-18 20:16:14,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e4cc341/8063dc1c6f0f48dbba3d597ac8ba372b [2020-04-18 20:16:14,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 20:16:14,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 20:16:14,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 20:16:14,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 20:16:14,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 20:16:14,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 08:16:14" (1/1) ... [2020-04-18 20:16:14,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbb6470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:14, skipping insertion in model container [2020-04-18 20:16:14,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 08:16:14" (1/1) ... [2020-04-18 20:16:14,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 20:16:14,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 20:16:14,592 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 20:16:14,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 20:16:14,937 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 20:16:14,958 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 20:16:14,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 20:16:15,067 INFO L208 MainTranslator]: Completed translation [2020-04-18 20:16:15,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15 WrapperNode [2020-04-18 20:16:15,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 20:16:15,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 20:16:15,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 20:16:15,069 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 20:16:15,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 20:16:15,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 20:16:15,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 20:16:15,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 20:16:15,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (1/1) ... [2020-04-18 20:16:15,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 20:16:15,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 20:16:15,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 20:16:15,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 20:16:15,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (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 20:16:15,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 20:16:15,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 20:16:15,244 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 20:16:15,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 20:16:15,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 20:16:15,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-18 20:16:15,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-04-18 20:16:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-04-18 20:16:15,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 20:16:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 20:16:15,247 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 20:16:15,629 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 20:16:15,630 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 20:16:15,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 08:16:15 BoogieIcfgContainer [2020-04-18 20:16:15,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 20:16:15,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 20:16:15,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 20:16:15,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 20:16:15,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 08:16:14" (1/3) ... [2020-04-18 20:16:15,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68448cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 08:16:15, skipping insertion in model container [2020-04-18 20:16:15,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 08:16:15" (2/3) ... [2020-04-18 20:16:15,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68448cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 08:16:15, skipping insertion in model container [2020-04-18 20:16:15,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 08:16:15" (3/3) ... [2020-04-18 20:16:15,642 INFO L109 eAbstractionObserver]: Analyzing ICFG condvar.i [2020-04-18 20:16:15,652 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 20:16:15,653 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 20:16:15,661 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 20:16:15,662 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 20:16:15,684 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,684 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,684 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,685 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,685 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,686 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,686 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,687 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,687 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,687 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,690 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,691 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,691 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,691 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,692 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,692 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 20:16:15,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 20:16:15,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 20:16:15,726 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 20:16:15,726 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 20:16:15,726 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 20:16:15,726 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 20:16:15,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 20:16:15,727 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 20:16:15,727 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 20:16:15,740 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 59 transitions, 126 flow [2020-04-18 20:16:15,761 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 171 states. [2020-04-18 20:16:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states. [2020-04-18 20:16:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 20:16:15,773 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:15,774 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:15,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1820808660, now seen corresponding path program 1 times [2020-04-18 20:16:15,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:15,788 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [818583894] [2020-04-18 20:16:15,802 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:15,818 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 31 transitions. [2020-04-18 20:16:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-04-18 20:16:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 20:16:15,822 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1820808660, now seen corresponding path program 2 times [2020-04-18 20:16:15,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:15,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764185324] [2020-04-18 20:16:15,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:16,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764185324] [2020-04-18 20:16:16,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 20:16:16,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 20:16:16,098 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:16,107 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:16,125 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 31 transitions. [2020-04-18 20:16:16,125 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:16,136 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 20:16:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 20:16:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 20:16:16,143 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-04-18 20:16:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:16,151 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2020-04-18 20:16:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2020-04-18 20:16:16,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:16,153 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [818583894] [2020-04-18 20:16:16,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:16,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:16,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [818583894] [2020-04-18 20:16:16,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 20:16:16,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:16,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 20:16:16,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 20:16:16,163 INFO L87 Difference]: Start difference. First operand 171 states. Second operand 3 states. [2020-04-18 20:16:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:16,189 INFO L93 Difference]: Finished difference Result 115 states and 192 transitions. [2020-04-18 20:16:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 20:16:16,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-04-18 20:16:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:16,203 INFO L225 Difference]: With dead ends: 115 [2020-04-18 20:16:16,203 INFO L226 Difference]: Without dead ends: 101 [2020-04-18 20:16:16,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 20:16:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-18 20:16:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-04-18 20:16:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-18 20:16:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 174 transitions. [2020-04-18 20:16:16,252 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 174 transitions. Word has length 31 [2020-04-18 20:16:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:16,253 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 174 transitions. [2020-04-18 20:16:16,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 20:16:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 174 transitions. [2020-04-18 20:16:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 20:16:16,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:16,255 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:16,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash -861506822, now seen corresponding path program 1 times [2020-04-18 20:16:16,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:16,257 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1789566492] [2020-04-18 20:16:16,258 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:16,261 INFO L259 McrAutomatonBuilder]: Finished intersection with 60 states and 83 transitions. [2020-04-18 20:16:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-04-18 20:16:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 20:16:16,264 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 598471288, now seen corresponding path program 2 times [2020-04-18 20:16:16,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:16,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488666438] [2020-04-18 20:16:16,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:16,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488666438] [2020-04-18 20:16:16,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 20:16:16,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 20:16:16,380 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:16,389 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:16,407 INFO L259 McrAutomatonBuilder]: Finished intersection with 56 states and 75 transitions. [2020-04-18 20:16:16,407 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:16,555 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 20:16:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 20:16:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-18 20:16:16,557 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 9 states. [2020-04-18 20:16:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:16,637 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2020-04-18 20:16:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-04-18 20:16:16,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:16,639 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1789566492] [2020-04-18 20:16:16,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:16,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:16,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1789566492] [2020-04-18 20:16:16,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 20:16:16,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 20:16:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-04-18 20:16:16,646 INFO L87 Difference]: Start difference. First operand 101 states and 174 transitions. Second operand 9 states. [2020-04-18 20:16:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:16,838 INFO L93 Difference]: Finished difference Result 207 states and 382 transitions. [2020-04-18 20:16:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 20:16:16,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-04-18 20:16:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:16,842 INFO L225 Difference]: With dead ends: 207 [2020-04-18 20:16:16,842 INFO L226 Difference]: Without dead ends: 197 [2020-04-18 20:16:16,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-04-18 20:16:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-18 20:16:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 108. [2020-04-18 20:16:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-04-18 20:16:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 186 transitions. [2020-04-18 20:16:16,858 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 186 transitions. Word has length 35 [2020-04-18 20:16:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:16,858 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 186 transitions. [2020-04-18 20:16:16,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 20:16:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 186 transitions. [2020-04-18 20:16:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 20:16:16,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:16,860 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:16,861 INFO L427 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1997829710, now seen corresponding path program 1 times [2020-04-18 20:16:16,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:16,862 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1811810211] [2020-04-18 20:16:16,863 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:16,866 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 148 transitions. [2020-04-18 20:16:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-04-18 20:16:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 20:16:16,869 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1866111866, now seen corresponding path program 2 times [2020-04-18 20:16:16,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:16,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965563973] [2020-04-18 20:16:16,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:16,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965563973] [2020-04-18 20:16:16,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256821516] [2020-04-18 20:16:16,966 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 20:16:17,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:16:17,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:17,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:17,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 20:16:17,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:17,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-04-18 20:16:17,071 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:17,077 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:17,095 INFO L259 McrAutomatonBuilder]: Finished intersection with 65 states and 88 transitions. [2020-04-18 20:16:17,096 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:17,183 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 20:16:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 20:16:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-18 20:16:17,184 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 9 states. [2020-04-18 20:16:17,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:17,270 INFO L93 Difference]: Finished difference Result 95 states and 148 transitions. [2020-04-18 20:16:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 148 transitions. [2020-04-18 20:16:17,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:17,271 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1811810211] [2020-04-18 20:16:17,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:17,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:17,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1811810211] [2020-04-18 20:16:17,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 20:16:17,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 20:16:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-18 20:16:17,274 INFO L87 Difference]: Start difference. First operand 108 states and 186 transitions. Second operand 9 states. [2020-04-18 20:16:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:17,383 INFO L93 Difference]: Finished difference Result 176 states and 314 transitions. [2020-04-18 20:16:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 20:16:17,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-04-18 20:16:17,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:17,386 INFO L225 Difference]: With dead ends: 176 [2020-04-18 20:16:17,387 INFO L226 Difference]: Without dead ends: 176 [2020-04-18 20:16:17,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-18 20:16:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-18 20:16:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-18 20:16:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-18 20:16:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 256 transitions. [2020-04-18 20:16:17,414 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 256 transitions. Word has length 40 [2020-04-18 20:16:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:17,415 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 256 transitions. [2020-04-18 20:16:17,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 20:16:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 256 transitions. [2020-04-18 20:16:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 20:16:17,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:17,420 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:17,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:17,621 INFO L427 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:17,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:17,622 INFO L82 PathProgramCache]: Analyzing trace with hash -817404038, now seen corresponding path program 3 times [2020-04-18 20:16:17,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:17,622 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [623524648] [2020-04-18 20:16:17,625 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:17,629 INFO L259 McrAutomatonBuilder]: Finished intersection with 130 states and 213 transitions. [2020-04-18 20:16:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-04-18 20:16:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 20:16:17,644 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 195496760, now seen corresponding path program 4 times [2020-04-18 20:16:17,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:17,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556950825] [2020-04-18 20:16:17,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:17,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556950825] [2020-04-18 20:16:17,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388087156] [2020-04-18 20:16:17,758 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 20:16:17,834 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:16:17,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:17,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 20:16:17,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:17,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:16:17,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-04-18 20:16:17,885 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:17,893 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:17,917 INFO L259 McrAutomatonBuilder]: Finished intersection with 75 states and 103 transitions. [2020-04-18 20:16:17,917 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:18,108 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 20:16:18,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 20:16:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-18 20:16:18,110 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 15 states. [2020-04-18 20:16:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:18,673 INFO L93 Difference]: Finished difference Result 165 states and 276 transitions. [2020-04-18 20:16:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 276 transitions. [2020-04-18 20:16:18,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:18,675 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [623524648] [2020-04-18 20:16:18,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:18,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 20:16:18,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [623524648] [2020-04-18 20:16:18,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 20:16:18,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 20:16:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2020-04-18 20:16:18,677 INFO L87 Difference]: Start difference. First operand 143 states and 256 transitions. Second operand 15 states. [2020-04-18 20:16:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:19,091 INFO L93 Difference]: Finished difference Result 325 states and 619 transitions. [2020-04-18 20:16:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 20:16:19,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-04-18 20:16:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:19,094 INFO L225 Difference]: With dead ends: 325 [2020-04-18 20:16:19,094 INFO L226 Difference]: Without dead ends: 325 [2020-04-18 20:16:19,095 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2020-04-18 20:16:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-04-18 20:16:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 178. [2020-04-18 20:16:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-04-18 20:16:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 326 transitions. [2020-04-18 20:16:19,124 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 326 transitions. Word has length 45 [2020-04-18 20:16:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:19,125 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 326 transitions. [2020-04-18 20:16:19,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 20:16:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 326 transitions. [2020-04-18 20:16:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 20:16:19,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:19,126 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:19,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:19,337 INFO L427 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1364742606, now seen corresponding path program 5 times [2020-04-18 20:16:19,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:19,338 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1499470182] [2020-04-18 20:16:19,339 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:19,342 INFO L259 McrAutomatonBuilder]: Finished intersection with 165 states and 278 transitions. [2020-04-18 20:16:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states. [2020-04-18 20:16:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-04-18 20:16:19,344 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:19,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1449409594, now seen corresponding path program 6 times [2020-04-18 20:16:19,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:19,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173548874] [2020-04-18 20:16:19,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:19,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173548874] [2020-04-18 20:16:19,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628421349] [2020-04-18 20:16:19,458 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 20:16:19,511 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:16:19,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:19,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:19,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-18 20:16:19,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:19,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2020-04-18 20:16:19,532 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:19,540 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:19,562 INFO L259 McrAutomatonBuilder]: Finished intersection with 85 states and 118 transitions. [2020-04-18 20:16:19,563 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:19,687 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 20:16:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 20:16:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-18 20:16:19,688 INFO L87 Difference]: Start difference. First operand 165 states. Second operand 13 states. [2020-04-18 20:16:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:19,889 INFO L93 Difference]: Finished difference Result 165 states and 278 transitions. [2020-04-18 20:16:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 278 transitions. [2020-04-18 20:16:19,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:19,890 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1499470182] [2020-04-18 20:16:19,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:19,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:19,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1499470182] [2020-04-18 20:16:19,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 20:16:19,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 20:16:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-04-18 20:16:19,892 INFO L87 Difference]: Start difference. First operand 178 states and 326 transitions. Second operand 13 states. [2020-04-18 20:16:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:20,005 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2020-04-18 20:16:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 20:16:20,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-04-18 20:16:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:20,008 INFO L225 Difference]: With dead ends: 246 [2020-04-18 20:16:20,008 INFO L226 Difference]: Without dead ends: 246 [2020-04-18 20:16:20,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-04-18 20:16:20,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-18 20:16:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 213. [2020-04-18 20:16:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-04-18 20:16:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 396 transitions. [2020-04-18 20:16:20,017 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 396 transitions. Word has length 50 [2020-04-18 20:16:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:20,017 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 396 transitions. [2020-04-18 20:16:20,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 20:16:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 396 transitions. [2020-04-18 20:16:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-18 20:16:20,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:20,019 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:20,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:20,226 INFO L427 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:20,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1990245370, now seen corresponding path program 7 times [2020-04-18 20:16:20,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:20,228 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [490144903] [2020-04-18 20:16:20,230 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:20,236 INFO L259 McrAutomatonBuilder]: Finished intersection with 200 states and 343 transitions. [2020-04-18 20:16:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states. [2020-04-18 20:16:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-04-18 20:16:20,238 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1842727944, now seen corresponding path program 8 times [2020-04-18 20:16:20,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:20,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400765352] [2020-04-18 20:16:20,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:20,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400765352] [2020-04-18 20:16:20,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527000241] [2020-04-18 20:16:20,369 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 20:16:20,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:16:20,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:20,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:20,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-04-18 20:16:20,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:20,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2020-04-18 20:16:20,451 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:20,458 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:20,477 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 133 transitions. [2020-04-18 20:16:20,477 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:20,610 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 15 times. [2020-04-18 20:16:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 20:16:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-18 20:16:20,611 INFO L87 Difference]: Start difference. First operand 200 states. Second operand 15 states. [2020-04-18 20:16:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:20,907 INFO L93 Difference]: Finished difference Result 200 states and 343 transitions. [2020-04-18 20:16:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 343 transitions. [2020-04-18 20:16:20,908 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:20,909 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [490144903] [2020-04-18 20:16:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:20,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [490144903] [2020-04-18 20:16:20,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 20:16:20,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 20:16:20,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-04-18 20:16:20,911 INFO L87 Difference]: Start difference. First operand 213 states and 396 transitions. Second operand 15 states. [2020-04-18 20:16:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:21,063 INFO L93 Difference]: Finished difference Result 281 states and 524 transitions. [2020-04-18 20:16:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 20:16:21,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-04-18 20:16:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:21,066 INFO L225 Difference]: With dead ends: 281 [2020-04-18 20:16:21,066 INFO L226 Difference]: Without dead ends: 281 [2020-04-18 20:16:21,067 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-04-18 20:16:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-04-18 20:16:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2020-04-18 20:16:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-04-18 20:16:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 466 transitions. [2020-04-18 20:16:21,074 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 466 transitions. Word has length 55 [2020-04-18 20:16:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:21,074 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 466 transitions. [2020-04-18 20:16:21,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 20:16:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 466 transitions. [2020-04-18 20:16:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-18 20:16:21,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:21,076 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:21,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:21,280 INFO L427 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1960850098, now seen corresponding path program 9 times [2020-04-18 20:16:21,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:21,281 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [488899221] [2020-04-18 20:16:21,283 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:21,287 INFO L259 McrAutomatonBuilder]: Finished intersection with 235 states and 408 transitions. [2020-04-18 20:16:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states. [2020-04-18 20:16:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-18 20:16:21,289 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1182012166, now seen corresponding path program 10 times [2020-04-18 20:16:21,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:21,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295651412] [2020-04-18 20:16:21,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:21,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295651412] [2020-04-18 20:16:21,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356736290] [2020-04-18 20:16:21,435 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 20:16:21,484 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:16:21,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:21,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 20:16:21,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:21,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:16:21,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-04-18 20:16:21,523 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:21,532 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:21,556 INFO L259 McrAutomatonBuilder]: Finished intersection with 105 states and 148 transitions. [2020-04-18 20:16:21,557 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:21,768 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 24 times. [2020-04-18 20:16:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 20:16:21,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-04-18 20:16:21,770 INFO L87 Difference]: Start difference. First operand 235 states. Second operand 21 states. [2020-04-18 20:16:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:23,396 INFO L93 Difference]: Finished difference Result 345 states and 606 transitions. [2020-04-18 20:16:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 606 transitions. [2020-04-18 20:16:23,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:23,398 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [488899221] [2020-04-18 20:16:23,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:23,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 20:16:23,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [488899221] [2020-04-18 20:16:23,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 20:16:23,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 20:16:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 20:16:23,400 INFO L87 Difference]: Start difference. First operand 248 states and 466 transitions. Second operand 21 states. [2020-04-18 20:16:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:24,183 INFO L93 Difference]: Finished difference Result 535 states and 1039 transitions. [2020-04-18 20:16:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 20:16:24,184 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2020-04-18 20:16:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:24,189 INFO L225 Difference]: With dead ends: 535 [2020-04-18 20:16:24,189 INFO L226 Difference]: Without dead ends: 535 [2020-04-18 20:16:24,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=882, Invalid=2540, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 20:16:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-04-18 20:16:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 283. [2020-04-18 20:16:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-04-18 20:16:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 536 transitions. [2020-04-18 20:16:24,201 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 536 transitions. Word has length 60 [2020-04-18 20:16:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:24,201 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 536 transitions. [2020-04-18 20:16:24,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 20:16:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 536 transitions. [2020-04-18 20:16:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-04-18 20:16:24,203 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:24,203 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:24,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:24,411 INFO L427 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -4558726, now seen corresponding path program 11 times [2020-04-18 20:16:24,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:24,412 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1813260370] [2020-04-18 20:16:24,414 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:24,419 INFO L259 McrAutomatonBuilder]: Finished intersection with 270 states and 473 transitions. [2020-04-18 20:16:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states. [2020-04-18 20:16:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-04-18 20:16:24,421 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2019650744, now seen corresponding path program 12 times [2020-04-18 20:16:24,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:24,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227819558] [2020-04-18 20:16:24,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:24,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227819558] [2020-04-18 20:16:24,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332971754] [2020-04-18 20:16:24,551 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 20:16:24,603 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:16:24,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:24,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:24,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-04-18 20:16:24,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:24,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15] total 16 [2020-04-18 20:16:24,636 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:24,644 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:24,665 INFO L259 McrAutomatonBuilder]: Finished intersection with 115 states and 163 transitions. [2020-04-18 20:16:24,665 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:24,826 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 20:16:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 20:16:24,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-18 20:16:24,827 INFO L87 Difference]: Start difference. First operand 270 states. Second operand 19 states. [2020-04-18 20:16:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:25,323 INFO L93 Difference]: Finished difference Result 270 states and 473 transitions. [2020-04-18 20:16:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 473 transitions. [2020-04-18 20:16:25,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:25,325 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1813260370] [2020-04-18 20:16:25,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:25,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:25,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1813260370] [2020-04-18 20:16:25,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 20:16:25,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 20:16:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 20:16:25,327 INFO L87 Difference]: Start difference. First operand 283 states and 536 transitions. Second operand 19 states. [2020-04-18 20:16:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:25,507 INFO L93 Difference]: Finished difference Result 351 states and 664 transitions. [2020-04-18 20:16:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 20:16:25,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-04-18 20:16:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:25,510 INFO L225 Difference]: With dead ends: 351 [2020-04-18 20:16:25,510 INFO L226 Difference]: Without dead ends: 351 [2020-04-18 20:16:25,511 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 20:16:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-04-18 20:16:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 318. [2020-04-18 20:16:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-04-18 20:16:25,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 606 transitions. [2020-04-18 20:16:25,519 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 606 transitions. Word has length 65 [2020-04-18 20:16:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:25,519 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 606 transitions. [2020-04-18 20:16:25,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 20:16:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 606 transitions. [2020-04-18 20:16:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-04-18 20:16:25,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:25,521 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:25,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:25,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash -865933106, now seen corresponding path program 13 times [2020-04-18 20:16:25,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:25,732 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1448742931] [2020-04-18 20:16:25,736 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:25,740 INFO L259 McrAutomatonBuilder]: Finished intersection with 305 states and 538 transitions. [2020-04-18 20:16:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states. [2020-04-18 20:16:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-04-18 20:16:25,743 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2120068538, now seen corresponding path program 14 times [2020-04-18 20:16:25,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:25,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082600810] [2020-04-18 20:16:25,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:25,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082600810] [2020-04-18 20:16:25,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413683548] [2020-04-18 20:16:25,935 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 20:16:25,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:16:25,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:25,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:25,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-04-18 20:16:26,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:26,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 18 [2020-04-18 20:16:26,028 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:26,042 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:26,083 INFO L259 McrAutomatonBuilder]: Finished intersection with 125 states and 178 transitions. [2020-04-18 20:16:26,083 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:26,301 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 20:16:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 20:16:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-04-18 20:16:26,302 INFO L87 Difference]: Start difference. First operand 305 states. Second operand 21 states. [2020-04-18 20:16:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:26,916 INFO L93 Difference]: Finished difference Result 305 states and 538 transitions. [2020-04-18 20:16:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 538 transitions. [2020-04-18 20:16:26,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:26,918 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1448742931] [2020-04-18 20:16:26,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:26,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1448742931] [2020-04-18 20:16:26,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 20:16:26,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 20:16:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1261, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 20:16:26,920 INFO L87 Difference]: Start difference. First operand 318 states and 606 transitions. Second operand 21 states. [2020-04-18 20:16:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:27,123 INFO L93 Difference]: Finished difference Result 386 states and 734 transitions. [2020-04-18 20:16:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 20:16:27,124 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-04-18 20:16:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:27,127 INFO L225 Difference]: With dead ends: 386 [2020-04-18 20:16:27,127 INFO L226 Difference]: Without dead ends: 386 [2020-04-18 20:16:27,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=545, Invalid=1261, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 20:16:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-04-18 20:16:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 353. [2020-04-18 20:16:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-04-18 20:16:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 676 transitions. [2020-04-18 20:16:27,136 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 676 transitions. Word has length 70 [2020-04-18 20:16:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:27,137 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 676 transitions. [2020-04-18 20:16:27,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 20:16:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 676 transitions. [2020-04-18 20:16:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-04-18 20:16:27,138 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:27,138 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:27,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:27,342 INFO L427 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:27,343 INFO L82 PathProgramCache]: Analyzing trace with hash -40073990, now seen corresponding path program 15 times [2020-04-18 20:16:27,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:27,344 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [637789097] [2020-04-18 20:16:27,347 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:27,352 INFO L259 McrAutomatonBuilder]: Finished intersection with 340 states and 603 transitions. [2020-04-18 20:16:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states. [2020-04-18 20:16:27,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-04-18 20:16:27,355 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -126306952, now seen corresponding path program 16 times [2020-04-18 20:16:27,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:27,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354887996] [2020-04-18 20:16:27,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:27,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354887996] [2020-04-18 20:16:27,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142831383] [2020-04-18 20:16:27,573 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 20:16:27,639 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:16:27,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:27,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 20:16:27,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:27,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:16:27,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-04-18 20:16:27,710 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:27,723 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:27,762 INFO L259 McrAutomatonBuilder]: Finished intersection with 135 states and 193 transitions. [2020-04-18 20:16:27,762 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:28,088 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 30 times. [2020-04-18 20:16:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 20:16:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-04-18 20:16:28,090 INFO L87 Difference]: Start difference. First operand 340 states. Second operand 27 states. [2020-04-18 20:16:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:31,157 INFO L93 Difference]: Finished difference Result 525 states and 936 transitions. [2020-04-18 20:16:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 936 transitions. [2020-04-18 20:16:31,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:31,159 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [637789097] [2020-04-18 20:16:31,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:31,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 20:16:31,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [637789097] [2020-04-18 20:16:31,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 20:16:31,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 20:16:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=3205, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 20:16:31,162 INFO L87 Difference]: Start difference. First operand 353 states and 676 transitions. Second operand 27 states. [2020-04-18 20:16:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:32,464 INFO L93 Difference]: Finished difference Result 745 states and 1459 transitions. [2020-04-18 20:16:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-04-18 20:16:32,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-04-18 20:16:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:32,472 INFO L225 Difference]: With dead ends: 745 [2020-04-18 20:16:32,472 INFO L226 Difference]: Without dead ends: 745 [2020-04-18 20:16:32,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1977, Invalid=5855, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 20:16:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2020-04-18 20:16:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 388. [2020-04-18 20:16:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-04-18 20:16:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 746 transitions. [2020-04-18 20:16:32,492 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 746 transitions. Word has length 75 [2020-04-18 20:16:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:32,493 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 746 transitions. [2020-04-18 20:16:32,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 20:16:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 746 transitions. [2020-04-18 20:16:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-04-18 20:16:32,498 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:32,498 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:32,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:32,705 INFO L427 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 655991886, now seen corresponding path program 17 times [2020-04-18 20:16:32,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:32,706 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [169208695] [2020-04-18 20:16:32,709 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:32,718 INFO L259 McrAutomatonBuilder]: Finished intersection with 375 states and 668 transitions. [2020-04-18 20:16:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states. [2020-04-18 20:16:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-04-18 20:16:32,721 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1669693050, now seen corresponding path program 18 times [2020-04-18 20:16:32,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:32,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708961796] [2020-04-18 20:16:32,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:32,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708961796] [2020-04-18 20:16:32,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176428583] [2020-04-18 20:16:32,978 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 20:16:33,023 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:16:33,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:33,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:33,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-04-18 20:16:33,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:33,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [21] total 22 [2020-04-18 20:16:33,055 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:33,068 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:33,106 INFO L259 McrAutomatonBuilder]: Finished intersection with 145 states and 208 transitions. [2020-04-18 20:16:33,106 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:33,391 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 25 times. [2020-04-18 20:16:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 20:16:33,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-04-18 20:16:33,392 INFO L87 Difference]: Start difference. First operand 375 states. Second operand 25 states. [2020-04-18 20:16:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:34,626 INFO L93 Difference]: Finished difference Result 375 states and 668 transitions. [2020-04-18 20:16:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 668 transitions. [2020-04-18 20:16:34,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:34,628 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [169208695] [2020-04-18 20:16:34,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:34,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:34,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [169208695] [2020-04-18 20:16:34,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 20:16:34,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 20:16:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=1937, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 20:16:34,630 INFO L87 Difference]: Start difference. First operand 388 states and 746 transitions. Second operand 25 states. [2020-04-18 20:16:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:34,887 INFO L93 Difference]: Finished difference Result 456 states and 874 transitions. [2020-04-18 20:16:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 20:16:34,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-04-18 20:16:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:34,890 INFO L225 Difference]: With dead ends: 456 [2020-04-18 20:16:34,890 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 20:16:34,891 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=819, Invalid=1937, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 20:16:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 20:16:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 423. [2020-04-18 20:16:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-04-18 20:16:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 816 transitions. [2020-04-18 20:16:34,901 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 816 transitions. Word has length 80 [2020-04-18 20:16:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:34,901 INFO L479 AbstractCegarLoop]: Abstraction has 423 states and 816 transitions. [2020-04-18 20:16:34,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 20:16:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 816 transitions. [2020-04-18 20:16:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-04-18 20:16:34,903 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:34,903 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:35,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:35,117 INFO L427 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash -649135750, now seen corresponding path program 19 times [2020-04-18 20:16:35,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:35,118 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1831677431] [2020-04-18 20:16:35,121 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:35,127 INFO L259 McrAutomatonBuilder]: Finished intersection with 410 states and 733 transitions. [2020-04-18 20:16:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2020-04-18 20:16:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-04-18 20:16:35,130 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2053370312, now seen corresponding path program 20 times [2020-04-18 20:16:35,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:35,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763253863] [2020-04-18 20:16:35,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763253863] [2020-04-18 20:16:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629144740] [2020-04-18 20:16:35,377 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 20:16:35,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:16:35,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:35,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:35,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-04-18 20:16:35,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:35,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [23] total 24 [2020-04-18 20:16:35,458 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:35,471 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:35,561 INFO L259 McrAutomatonBuilder]: Finished intersection with 155 states and 223 transitions. [2020-04-18 20:16:35,561 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:35,830 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 27 times. [2020-04-18 20:16:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 20:16:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2020-04-18 20:16:35,831 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 27 states. [2020-04-18 20:16:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:36,884 INFO L93 Difference]: Finished difference Result 410 states and 733 transitions. [2020-04-18 20:16:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 733 transitions. [2020-04-18 20:16:36,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:36,886 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1831677431] [2020-04-18 20:16:36,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:36,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:36,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1831677431] [2020-04-18 20:16:36,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 20:16:36,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 20:16:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=977, Invalid=2329, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 20:16:36,890 INFO L87 Difference]: Start difference. First operand 423 states and 816 transitions. Second operand 27 states. [2020-04-18 20:16:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:37,141 INFO L93 Difference]: Finished difference Result 491 states and 944 transitions. [2020-04-18 20:16:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 20:16:37,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 85 [2020-04-18 20:16:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:37,145 INFO L225 Difference]: With dead ends: 491 [2020-04-18 20:16:37,145 INFO L226 Difference]: Without dead ends: 491 [2020-04-18 20:16:37,146 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=977, Invalid=2329, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 20:16:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-04-18 20:16:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 458. [2020-04-18 20:16:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-04-18 20:16:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 886 transitions. [2020-04-18 20:16:37,156 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 886 transitions. Word has length 85 [2020-04-18 20:16:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:37,157 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 886 transitions. [2020-04-18 20:16:37,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 20:16:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 886 transitions. [2020-04-18 20:16:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 20:16:37,158 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:37,159 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:37,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:37,363 INFO L427 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1757675570, now seen corresponding path program 21 times [2020-04-18 20:16:37,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:37,364 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [16642869] [2020-04-18 20:16:37,367 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:37,375 INFO L259 McrAutomatonBuilder]: Finished intersection with 445 states and 798 transitions. [2020-04-18 20:16:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states. [2020-04-18 20:16:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 20:16:37,379 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1062248646, now seen corresponding path program 22 times [2020-04-18 20:16:37,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:37,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743589255] [2020-04-18 20:16:37,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:37,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743589255] [2020-04-18 20:16:37,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508545931] [2020-04-18 20:16:37,776 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 20:16:37,851 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:16:37,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:37,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-18 20:16:37,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:37,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:16:37,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-04-18 20:16:37,901 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:37,928 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:37,991 INFO L259 McrAutomatonBuilder]: Finished intersection with 165 states and 238 transitions. [2020-04-18 20:16:37,992 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:38,383 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 36 times. [2020-04-18 20:16:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 20:16:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 20:16:38,384 INFO L87 Difference]: Start difference. First operand 445 states. Second operand 33 states. [2020-04-18 20:16:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:43,330 INFO L93 Difference]: Finished difference Result 705 states and 1266 transitions. [2020-04-18 20:16:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1266 transitions. [2020-04-18 20:16:43,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:43,333 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [16642869] [2020-04-18 20:16:43,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:43,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 20:16:43,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [16642869] [2020-04-18 20:16:43,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 20:16:43,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 20:16:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1904, Invalid=5578, Unknown=0, NotChecked=0, Total=7482 [2020-04-18 20:16:43,338 INFO L87 Difference]: Start difference. First operand 458 states and 886 transitions. Second operand 33 states. [2020-04-18 20:16:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:45,036 INFO L93 Difference]: Finished difference Result 955 states and 1879 transitions. [2020-04-18 20:16:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-04-18 20:16:45,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 90 [2020-04-18 20:16:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:45,042 INFO L225 Difference]: With dead ends: 955 [2020-04-18 20:16:45,043 INFO L226 Difference]: Without dead ends: 955 [2020-04-18 20:16:45,047 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3513, Invalid=10529, Unknown=0, NotChecked=0, Total=14042 [2020-04-18 20:16:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-04-18 20:16:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 493. [2020-04-18 20:16:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-04-18 20:16:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 956 transitions. [2020-04-18 20:16:45,061 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 956 transitions. Word has length 90 [2020-04-18 20:16:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:45,061 INFO L479 AbstractCegarLoop]: Abstraction has 493 states and 956 transitions. [2020-04-18 20:16:45,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 20:16:45,062 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 956 transitions. [2020-04-18 20:16:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-04-18 20:16:45,063 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:45,063 INFO L425 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:45,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:45,267 INFO L427 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:45,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1373228538, now seen corresponding path program 23 times [2020-04-18 20:16:45,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:45,269 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1042970433] [2020-04-18 20:16:45,272 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:45,282 INFO L259 McrAutomatonBuilder]: Finished intersection with 480 states and 863 transitions. [2020-04-18 20:16:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states. [2020-04-18 20:16:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-04-18 20:16:45,284 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1946716424, now seen corresponding path program 24 times [2020-04-18 20:16:45,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:45,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851517483] [2020-04-18 20:16:45,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:45,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851517483] [2020-04-18 20:16:45,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215427673] [2020-04-18 20:16:45,606 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 20:16:45,649 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:16:45,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:45,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:45,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-04-18 20:16:45,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:45,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [27] total 28 [2020-04-18 20:16:45,671 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:45,683 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:45,727 INFO L259 McrAutomatonBuilder]: Finished intersection with 175 states and 253 transitions. [2020-04-18 20:16:45,727 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:46,022 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 31 times. [2020-04-18 20:16:46,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 20:16:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2020-04-18 20:16:46,024 INFO L87 Difference]: Start difference. First operand 480 states. Second operand 31 states. [2020-04-18 20:16:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:47,411 INFO L93 Difference]: Finished difference Result 480 states and 863 transitions. [2020-04-18 20:16:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 863 transitions. [2020-04-18 20:16:47,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:47,412 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1042970433] [2020-04-18 20:16:47,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:47,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:47,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1042970433] [2020-04-18 20:16:47,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 20:16:47,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 20:16:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=3221, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 20:16:47,414 INFO L87 Difference]: Start difference. First operand 493 states and 956 transitions. Second operand 31 states. [2020-04-18 20:16:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:47,666 INFO L93 Difference]: Finished difference Result 561 states and 1084 transitions. [2020-04-18 20:16:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 20:16:47,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-04-18 20:16:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:47,670 INFO L225 Difference]: With dead ends: 561 [2020-04-18 20:16:47,670 INFO L226 Difference]: Without dead ends: 561 [2020-04-18 20:16:47,671 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1335, Invalid=3221, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 20:16:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-04-18 20:16:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 528. [2020-04-18 20:16:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-04-18 20:16:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1026 transitions. [2020-04-18 20:16:47,682 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1026 transitions. Word has length 95 [2020-04-18 20:16:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:47,682 INFO L479 AbstractCegarLoop]: Abstraction has 528 states and 1026 transitions. [2020-04-18 20:16:47,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 20:16:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1026 transitions. [2020-04-18 20:16:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-04-18 20:16:47,684 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:47,684 INFO L425 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:47,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:47,887 INFO L427 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:47,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2101216434, now seen corresponding path program 25 times [2020-04-18 20:16:47,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:47,888 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1000232888] [2020-04-18 20:16:47,890 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:47,900 INFO L259 McrAutomatonBuilder]: Finished intersection with 515 states and 928 transitions. [2020-04-18 20:16:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states. [2020-04-18 20:16:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-04-18 20:16:47,903 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:47,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1183272954, now seen corresponding path program 26 times [2020-04-18 20:16:47,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:47,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280425284] [2020-04-18 20:16:47,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:48,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280425284] [2020-04-18 20:16:48,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886113272] [2020-04-18 20:16:48,256 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 20:16:48,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:16:48,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:48,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:16:48,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-04-18 20:16:48,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:48,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [29] total 30 [2020-04-18 20:16:48,330 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:48,349 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:48,403 INFO L259 McrAutomatonBuilder]: Finished intersection with 185 states and 268 transitions. [2020-04-18 20:16:48,403 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:49,047 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 33 times. [2020-04-18 20:16:49,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 20:16:49,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 20:16:49,048 INFO L87 Difference]: Start difference. First operand 515 states. Second operand 33 states. [2020-04-18 20:16:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:50,605 INFO L93 Difference]: Finished difference Result 515 states and 928 transitions. [2020-04-18 20:16:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 928 transitions. [2020-04-18 20:16:50,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:50,607 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1000232888] [2020-04-18 20:16:50,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:50,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:16:50,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1000232888] [2020-04-18 20:16:50,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 20:16:50,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 20:16:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1535, Invalid=3721, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 20:16:50,608 INFO L87 Difference]: Start difference. First operand 528 states and 1026 transitions. Second operand 33 states. [2020-04-18 20:16:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:50,942 INFO L93 Difference]: Finished difference Result 596 states and 1154 transitions. [2020-04-18 20:16:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 20:16:50,942 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 100 [2020-04-18 20:16:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:16:50,946 INFO L225 Difference]: With dead ends: 596 [2020-04-18 20:16:50,946 INFO L226 Difference]: Without dead ends: 596 [2020-04-18 20:16:50,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1535, Invalid=3721, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 20:16:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2020-04-18 20:16:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 563. [2020-04-18 20:16:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-04-18 20:16:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1096 transitions. [2020-04-18 20:16:50,965 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1096 transitions. Word has length 100 [2020-04-18 20:16:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:16:50,965 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 1096 transitions. [2020-04-18 20:16:50,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 20:16:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1096 transitions. [2020-04-18 20:16:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-04-18 20:16:50,967 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:16:50,967 INFO L425 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:16:51,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:16:51,171 INFO L427 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:16:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -62586246, now seen corresponding path program 27 times [2020-04-18 20:16:51,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:16:51,171 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1459499216] [2020-04-18 20:16:51,173 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:51,184 INFO L259 McrAutomatonBuilder]: Finished intersection with 550 states and 993 transitions. [2020-04-18 20:16:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states. [2020-04-18 20:16:51,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-04-18 20:16:51,188 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:16:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:16:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash 817295288, now seen corresponding path program 28 times [2020-04-18 20:16:51,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:16:51,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134378663] [2020-04-18 20:16:51,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:16:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:16:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:51,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134378663] [2020-04-18 20:16:51,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301266844] [2020-04-18 20:16:51,597 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 20:16:51,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:16:51,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:16:51,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2020-04-18 20:16:51,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:16:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:16:51,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:16:51,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2020-04-18 20:16:51,716 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:16:51,736 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:16:51,814 INFO L259 McrAutomatonBuilder]: Finished intersection with 195 states and 283 transitions. [2020-04-18 20:16:51,814 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:16:52,330 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 42 times. [2020-04-18 20:16:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 20:16:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 20:16:52,331 INFO L87 Difference]: Start difference. First operand 550 states. Second operand 39 states. [2020-04-18 20:16:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:16:59,472 INFO L93 Difference]: Finished difference Result 885 states and 1596 transitions. [2020-04-18 20:16:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1596 transitions. [2020-04-18 20:16:59,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:16:59,474 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1459499216] [2020-04-18 20:16:59,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:16:59,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-04-18 20:16:59,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1459499216] [2020-04-18 20:16:59,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-04-18 20:16:59,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:16:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 20:16:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2957, Invalid=8599, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 20:16:59,476 INFO L87 Difference]: Start difference. First operand 563 states and 1096 transitions. Second operand 39 states. [2020-04-18 20:17:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:01,765 INFO L93 Difference]: Finished difference Result 1165 states and 2299 transitions. [2020-04-18 20:17:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-04-18 20:17:01,766 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 105 [2020-04-18 20:17:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:01,771 INFO L225 Difference]: With dead ends: 1165 [2020-04-18 20:17:01,771 INFO L226 Difference]: Without dead ends: 1165 [2020-04-18 20:17:01,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5490, Invalid=16562, Unknown=0, NotChecked=0, Total=22052 [2020-04-18 20:17:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-04-18 20:17:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 598. [2020-04-18 20:17:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2020-04-18 20:17:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1166 transitions. [2020-04-18 20:17:01,788 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1166 transitions. Word has length 105 [2020-04-18 20:17:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:01,789 INFO L479 AbstractCegarLoop]: Abstraction has 598 states and 1166 transitions. [2020-04-18 20:17:01,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-04-18 20:17:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1166 transitions. [2020-04-18 20:17:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-04-18 20:17:01,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:01,790 INFO L425 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 20:17:01,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:01,994 INFO L427 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash 967022286, now seen corresponding path program 29 times [2020-04-18 20:17:01,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:01,996 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1621093992] [2020-04-18 20:17:01,998 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:02,016 INFO L259 McrAutomatonBuilder]: Finished intersection with 585 states and 1058 transitions. [2020-04-18 20:17:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states. [2020-04-18 20:17:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-04-18 20:17:02,020 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1095151430, now seen corresponding path program 30 times [2020-04-18 20:17:02,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:02,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083286215] [2020-04-18 20:17:02,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:02,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083286215] [2020-04-18 20:17:02,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357128531] [2020-04-18 20:17:02,490 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 20:17:02,537 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:17:02,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:02,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:17:02,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-04-18 20:17:02,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:02,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [33] total 34 [2020-04-18 20:17:02,571 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:02,584 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:02,646 INFO L259 McrAutomatonBuilder]: Finished intersection with 205 states and 298 transitions. [2020-04-18 20:17:02,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:03,117 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 37 times. [2020-04-18 20:17:03,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 20:17:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 20:17:03,120 INFO L87 Difference]: Start difference. First operand 585 states. Second operand 37 states. [2020-04-18 20:17:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:05,133 INFO L93 Difference]: Finished difference Result 585 states and 1058 transitions. [2020-04-18 20:17:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1058 transitions. [2020-04-18 20:17:05,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:05,135 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1621093992] [2020-04-18 20:17:05,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:05,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:17:05,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1621093992] [2020-04-18 20:17:05,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 20:17:05,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:05,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 20:17:05,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1977, Invalid=4829, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 20:17:05,136 INFO L87 Difference]: Start difference. First operand 598 states and 1166 transitions. Second operand 37 states. [2020-04-18 20:17:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:05,548 INFO L93 Difference]: Finished difference Result 666 states and 1294 transitions. [2020-04-18 20:17:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-04-18 20:17:05,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 110 [2020-04-18 20:17:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:05,553 INFO L225 Difference]: With dead ends: 666 [2020-04-18 20:17:05,553 INFO L226 Difference]: Without dead ends: 666 [2020-04-18 20:17:05,554 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1977, Invalid=4829, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 20:17:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2020-04-18 20:17:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 633. [2020-04-18 20:17:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2020-04-18 20:17:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1236 transitions. [2020-04-18 20:17:05,564 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1236 transitions. Word has length 110 [2020-04-18 20:17:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:05,565 INFO L479 AbstractCegarLoop]: Abstraction has 633 states and 1236 transitions. [2020-04-18 20:17:05,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 20:17:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1236 transitions. [2020-04-18 20:17:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-04-18 20:17:05,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:05,567 INFO L425 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:05,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:05,770 INFO L427 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:05,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1013410054, now seen corresponding path program 31 times [2020-04-18 20:17:05,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:05,772 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1921969581] [2020-04-18 20:17:05,774 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:05,794 INFO L259 McrAutomatonBuilder]: Finished intersection with 620 states and 1123 transitions. [2020-04-18 20:17:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states. [2020-04-18 20:17:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-04-18 20:17:05,799 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:05,799 INFO L82 PathProgramCache]: Analyzing trace with hash 302413944, now seen corresponding path program 32 times [2020-04-18 20:17:05,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:05,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362299885] [2020-04-18 20:17:05,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:06,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362299885] [2020-04-18 20:17:06,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986130631] [2020-04-18 20:17:06,325 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 20:17:06,367 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:17:06,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:06,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:17:06,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-04-18 20:17:06,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:06,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [35] total 36 [2020-04-18 20:17:06,391 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:06,423 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:06,516 INFO L259 McrAutomatonBuilder]: Finished intersection with 215 states and 313 transitions. [2020-04-18 20:17:06,516 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:07,309 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 39 times. [2020-04-18 20:17:07,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 20:17:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 20:17:07,310 INFO L87 Difference]: Start difference. First operand 620 states. Second operand 39 states. [2020-04-18 20:17:09,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:09,799 INFO L93 Difference]: Finished difference Result 620 states and 1123 transitions. [2020-04-18 20:17:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1123 transitions. [2020-04-18 20:17:09,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:09,801 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1921969581] [2020-04-18 20:17:09,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:09,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:17:09,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1921969581] [2020-04-18 20:17:09,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-04-18 20:17:09,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 20:17:09,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=5437, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 20:17:09,804 INFO L87 Difference]: Start difference. First operand 633 states and 1236 transitions. Second operand 39 states. [2020-04-18 20:17:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:10,218 INFO L93 Difference]: Finished difference Result 701 states and 1364 transitions. [2020-04-18 20:17:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-04-18 20:17:10,219 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-04-18 20:17:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:10,223 INFO L225 Difference]: With dead ends: 701 [2020-04-18 20:17:10,223 INFO L226 Difference]: Without dead ends: 701 [2020-04-18 20:17:10,224 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2219, Invalid=5437, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 20:17:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-04-18 20:17:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 668. [2020-04-18 20:17:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-04-18 20:17:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1306 transitions. [2020-04-18 20:17:10,237 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1306 transitions. Word has length 115 [2020-04-18 20:17:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:10,237 INFO L479 AbstractCegarLoop]: Abstraction has 668 states and 1306 transitions. [2020-04-18 20:17:10,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-04-18 20:17:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1306 transitions. [2020-04-18 20:17:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-04-18 20:17:10,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:10,239 INFO L425 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:10,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:10,442 INFO L427 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:10,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1977143886, now seen corresponding path program 33 times [2020-04-18 20:17:10,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:10,444 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [882054072] [2020-04-18 20:17:10,445 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:10,460 INFO L259 McrAutomatonBuilder]: Finished intersection with 655 states and 1188 transitions. [2020-04-18 20:17:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states. [2020-04-18 20:17:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-04-18 20:17:10,463 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash 873373318, now seen corresponding path program 34 times [2020-04-18 20:17:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:10,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521326353] [2020-04-18 20:17:10,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:10,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521326353] [2020-04-18 20:17:10,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275629149] [2020-04-18 20:17:10,987 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 20:17:11,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:17:11,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:11,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 36 conjunts are in the unsatisfiable core [2020-04-18 20:17:11,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:11,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:17:11,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2020-04-18 20:17:11,103 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:11,113 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:11,189 INFO L259 McrAutomatonBuilder]: Finished intersection with 225 states and 328 transitions. [2020-04-18 20:17:11,189 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:11,846 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 48 times. [2020-04-18 20:17:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 20:17:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 20:17:11,847 INFO L87 Difference]: Start difference. First operand 655 states. Second operand 45 states. [2020-04-18 20:17:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:21,674 INFO L93 Difference]: Finished difference Result 1065 states and 1926 transitions. [2020-04-18 20:17:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1926 transitions. [2020-04-18 20:17:21,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:21,677 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [882054072] [2020-04-18 20:17:21,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:21,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-04-18 20:17:21,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [882054072] [2020-04-18 20:17:21,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 20:17:21,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 20:17:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4244, Invalid=12268, Unknown=0, NotChecked=0, Total=16512 [2020-04-18 20:17:21,678 INFO L87 Difference]: Start difference. First operand 668 states and 1306 transitions. Second operand 45 states. [2020-04-18 20:17:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:25,458 INFO L93 Difference]: Finished difference Result 1375 states and 2719 transitions. [2020-04-18 20:17:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2020-04-18 20:17:25,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 120 [2020-04-18 20:17:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:25,465 INFO L225 Difference]: With dead ends: 1375 [2020-04-18 20:17:25,466 INFO L226 Difference]: Without dead ends: 1375 [2020-04-18 20:17:25,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10390 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7908, Invalid=23954, Unknown=0, NotChecked=0, Total=31862 [2020-04-18 20:17:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-04-18 20:17:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 703. [2020-04-18 20:17:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-04-18 20:17:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1376 transitions. [2020-04-18 20:17:25,486 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1376 transitions. Word has length 120 [2020-04-18 20:17:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:25,486 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 1376 transitions. [2020-04-18 20:17:25,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 20:17:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1376 transitions. [2020-04-18 20:17:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-04-18 20:17:25,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:25,488 INFO L425 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:25,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:25,693 INFO L427 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1759284090, now seen corresponding path program 35 times [2020-04-18 20:17:25,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:25,694 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1641448273] [2020-04-18 20:17:25,696 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:25,711 INFO L259 McrAutomatonBuilder]: Finished intersection with 690 states and 1253 transitions. [2020-04-18 20:17:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states. [2020-04-18 20:17:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-04-18 20:17:25,715 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 118624568, now seen corresponding path program 36 times [2020-04-18 20:17:25,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:25,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114065958] [2020-04-18 20:17:25,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:26,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114065958] [2020-04-18 20:17:26,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704722634] [2020-04-18 20:17:26,289 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 20:17:26,341 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:17:26,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:26,341 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:17:26,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-04-18 20:17:26,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:26,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [39] total 40 [2020-04-18 20:17:26,367 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:26,379 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:26,457 INFO L259 McrAutomatonBuilder]: Finished intersection with 235 states and 343 transitions. [2020-04-18 20:17:26,458 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:26,989 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 43 times. [2020-04-18 20:17:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 20:17:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 20:17:26,991 INFO L87 Difference]: Start difference. First operand 690 states. Second operand 43 states. [2020-04-18 20:17:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:29,840 INFO L93 Difference]: Finished difference Result 690 states and 1253 transitions. [2020-04-18 20:17:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1253 transitions. [2020-04-18 20:17:29,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:29,841 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1641448273] [2020-04-18 20:17:29,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:29,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:17:29,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1641448273] [2020-04-18 20:17:29,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-18 20:17:29,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 20:17:29,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2745, Invalid=6761, Unknown=0, NotChecked=0, Total=9506 [2020-04-18 20:17:29,843 INFO L87 Difference]: Start difference. First operand 703 states and 1376 transitions. Second operand 43 states. [2020-04-18 20:17:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:30,315 INFO L93 Difference]: Finished difference Result 771 states and 1504 transitions. [2020-04-18 20:17:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-04-18 20:17:30,316 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2020-04-18 20:17:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:30,321 INFO L225 Difference]: With dead ends: 771 [2020-04-18 20:17:30,321 INFO L226 Difference]: Without dead ends: 771 [2020-04-18 20:17:30,322 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2745, Invalid=6761, Unknown=0, NotChecked=0, Total=9506 [2020-04-18 20:17:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-04-18 20:17:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 738. [2020-04-18 20:17:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-04-18 20:17:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1446 transitions. [2020-04-18 20:17:30,334 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1446 transitions. Word has length 125 [2020-04-18 20:17:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:30,335 INFO L479 AbstractCegarLoop]: Abstraction has 738 states and 1446 transitions. [2020-04-18 20:17:30,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-18 20:17:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1446 transitions. [2020-04-18 20:17:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-04-18 20:17:30,336 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:30,336 INFO L425 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:30,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:30,540 INFO L427 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -614879794, now seen corresponding path program 37 times [2020-04-18 20:17:30,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:30,542 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1668114472] [2020-04-18 20:17:30,543 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:30,561 INFO L259 McrAutomatonBuilder]: Finished intersection with 725 states and 1318 transitions. [2020-04-18 20:17:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states. [2020-04-18 20:17:30,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-04-18 20:17:30,566 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1445232070, now seen corresponding path program 38 times [2020-04-18 20:17:30,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:30,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638424142] [2020-04-18 20:17:30,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:31,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638424142] [2020-04-18 20:17:31,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495319913] [2020-04-18 20:17:31,222 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 20:17:31,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:17:31,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:31,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:17:31,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-04-18 20:17:31,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:31,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [41] total 42 [2020-04-18 20:17:31,298 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:31,310 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:31,492 INFO L259 McrAutomatonBuilder]: Finished intersection with 245 states and 358 transitions. [2020-04-18 20:17:31,492 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:32,101 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 45 times. [2020-04-18 20:17:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 20:17:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 20:17:32,103 INFO L87 Difference]: Start difference. First operand 725 states. Second operand 45 states. [2020-04-18 20:17:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:35,300 INFO L93 Difference]: Finished difference Result 725 states and 1318 transitions. [2020-04-18 20:17:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1318 transitions. [2020-04-18 20:17:35,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:35,302 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1668114472] [2020-04-18 20:17:35,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:35,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:17:35,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1668114472] [2020-04-18 20:17:35,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 20:17:35,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 20:17:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3029, Invalid=7477, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 20:17:35,304 INFO L87 Difference]: Start difference. First operand 738 states and 1446 transitions. Second operand 45 states. [2020-04-18 20:17:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:35,802 INFO L93 Difference]: Finished difference Result 806 states and 1574 transitions. [2020-04-18 20:17:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-04-18 20:17:35,802 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2020-04-18 20:17:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:35,807 INFO L225 Difference]: With dead ends: 806 [2020-04-18 20:17:35,807 INFO L226 Difference]: Without dead ends: 806 [2020-04-18 20:17:35,808 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3029, Invalid=7477, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 20:17:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2020-04-18 20:17:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 773. [2020-04-18 20:17:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-04-18 20:17:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1516 transitions. [2020-04-18 20:17:35,817 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1516 transitions. Word has length 130 [2020-04-18 20:17:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:35,817 INFO L479 AbstractCegarLoop]: Abstraction has 773 states and 1516 transitions. [2020-04-18 20:17:35,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 20:17:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1516 transitions. [2020-04-18 20:17:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-04-18 20:17:35,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:35,818 INFO L425 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:36,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:36,021 INFO L427 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash 51961850, now seen corresponding path program 39 times [2020-04-18 20:17:36,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:36,022 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1094562002] [2020-04-18 20:17:36,024 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:36,042 INFO L259 McrAutomatonBuilder]: Finished intersection with 760 states and 1383 transitions. [2020-04-18 20:17:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states. [2020-04-18 20:17:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-04-18 20:17:36,046 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash -536495624, now seen corresponding path program 40 times [2020-04-18 20:17:36,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:36,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038183770] [2020-04-18 20:17:36,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:36,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038183770] [2020-04-18 20:17:36,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386448672] [2020-04-18 20:17:36,682 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 20:17:36,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:17:36,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:36,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 42 conjunts are in the unsatisfiable core [2020-04-18 20:17:36,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:36,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:17:36,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 45 [2020-04-18 20:17:36,800 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:36,813 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:36,908 INFO L259 McrAutomatonBuilder]: Finished intersection with 255 states and 373 transitions. [2020-04-18 20:17:36,908 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:37,648 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 54 times. [2020-04-18 20:17:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 20:17:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 20:17:37,650 INFO L87 Difference]: Start difference. First operand 760 states. Second operand 51 states. [2020-04-18 20:17:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:50,571 INFO L93 Difference]: Finished difference Result 1245 states and 2256 transitions. [2020-04-18 20:17:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2256 transitions. [2020-04-18 20:17:50,574 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:50,574 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1094562002] [2020-04-18 20:17:50,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:50,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-04-18 20:17:50,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1094562002] [2020-04-18 20:17:50,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-04-18 20:17:50,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 20:17:50,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5765, Invalid=16585, Unknown=0, NotChecked=0, Total=22350 [2020-04-18 20:17:50,577 INFO L87 Difference]: Start difference. First operand 773 states and 1516 transitions. Second operand 51 states. [2020-04-18 20:17:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:54,243 INFO L93 Difference]: Finished difference Result 1585 states and 3139 transitions. [2020-04-18 20:17:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2020-04-18 20:17:54,244 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 135 [2020-04-18 20:17:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:17:54,252 INFO L225 Difference]: With dead ends: 1585 [2020-04-18 20:17:54,252 INFO L226 Difference]: Without dead ends: 1585 [2020-04-18 20:17:54,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14386 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=10767, Invalid=32705, Unknown=0, NotChecked=0, Total=43472 [2020-04-18 20:17:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2020-04-18 20:17:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 808. [2020-04-18 20:17:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2020-04-18 20:17:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1586 transitions. [2020-04-18 20:17:54,272 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1586 transitions. Word has length 135 [2020-04-18 20:17:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:17:54,272 INFO L479 AbstractCegarLoop]: Abstraction has 808 states and 1586 transitions. [2020-04-18 20:17:54,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-04-18 20:17:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1586 transitions. [2020-04-18 20:17:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-04-18 20:17:54,273 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:17:54,273 INFO L425 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:17:54,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:17:54,474 INFO L427 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:17:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2015242574, now seen corresponding path program 41 times [2020-04-18 20:17:54,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:17:54,475 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [976856889] [2020-04-18 20:17:54,477 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:54,497 INFO L259 McrAutomatonBuilder]: Finished intersection with 795 states and 1448 transitions. [2020-04-18 20:17:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-04-18 20:17:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-04-18 20:17:54,501 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:17:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:17:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash 316427526, now seen corresponding path program 42 times [2020-04-18 20:17:54,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:17:54,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669323664] [2020-04-18 20:17:54,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:17:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:17:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:17:55,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669323664] [2020-04-18 20:17:55,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557420954] [2020-04-18 20:17:55,289 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 20:17:55,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:17:55,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:17:55,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:17:55,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:17:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-04-18 20:17:55,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:55,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [45] total 46 [2020-04-18 20:17:55,367 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:17:55,383 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:17:55,489 INFO L259 McrAutomatonBuilder]: Finished intersection with 265 states and 388 transitions. [2020-04-18 20:17:55,489 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:17:56,201 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 49 times. [2020-04-18 20:17:56,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 20:17:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1808, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 20:17:56,202 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 49 states. [2020-04-18 20:17:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:17:59,972 INFO L93 Difference]: Finished difference Result 795 states and 1448 transitions. [2020-04-18 20:17:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1448 transitions. [2020-04-18 20:17:59,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:17:59,974 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [976856889] [2020-04-18 20:17:59,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:17:59,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:17:59,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [976856889] [2020-04-18 20:17:59,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 20:17:59,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:17:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 20:17:59,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3639, Invalid=9017, Unknown=0, NotChecked=0, Total=12656 [2020-04-18 20:17:59,976 INFO L87 Difference]: Start difference. First operand 808 states and 1586 transitions. Second operand 49 states. [2020-04-18 20:18:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:00,533 INFO L93 Difference]: Finished difference Result 876 states and 1714 transitions. [2020-04-18 20:18:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-04-18 20:18:00,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2020-04-18 20:18:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:18:00,539 INFO L225 Difference]: With dead ends: 876 [2020-04-18 20:18:00,539 INFO L226 Difference]: Without dead ends: 876 [2020-04-18 20:18:00,540 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3639, Invalid=9017, Unknown=0, NotChecked=0, Total=12656 [2020-04-18 20:18:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-04-18 20:18:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 843. [2020-04-18 20:18:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-04-18 20:18:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1656 transitions. [2020-04-18 20:18:00,552 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1656 transitions. Word has length 140 [2020-04-18 20:18:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:18:00,552 INFO L479 AbstractCegarLoop]: Abstraction has 843 states and 1656 transitions. [2020-04-18 20:18:00,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 20:18:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1656 transitions. [2020-04-18 20:18:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-04-18 20:18:00,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:18:00,554 INFO L425 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:18:00,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:18:00,758 INFO L427 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:18:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2136315002, now seen corresponding path program 43 times [2020-04-18 20:18:00,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:18:00,759 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [187804081] [2020-04-18 20:18:00,761 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:00,781 INFO L259 McrAutomatonBuilder]: Finished intersection with 830 states and 1513 transitions. [2020-04-18 20:18:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states. [2020-04-18 20:18:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-04-18 20:18:00,786 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:18:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash 638415544, now seen corresponding path program 44 times [2020-04-18 20:18:00,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:18:00,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552252566] [2020-04-18 20:18:00,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:18:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:18:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:01,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552252566] [2020-04-18 20:18:01,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132943619] [2020-04-18 20:18:01,778 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 20:18:01,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:18:01,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:18:01,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:18:01,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:18:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-04-18 20:18:01,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:01,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [47] total 48 [2020-04-18 20:18:01,859 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:18:01,874 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:01,986 INFO L259 McrAutomatonBuilder]: Finished intersection with 275 states and 403 transitions. [2020-04-18 20:18:01,986 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:18:03,000 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 51 times. [2020-04-18 20:18:03,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 20:18:03,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 20:18:03,002 INFO L87 Difference]: Start difference. First operand 830 states. Second operand 51 states. [2020-04-18 20:18:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:07,076 INFO L93 Difference]: Finished difference Result 830 states and 1513 transitions. [2020-04-18 20:18:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1513 transitions. [2020-04-18 20:18:07,078 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:18:07,078 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [187804081] [2020-04-18 20:18:07,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:07,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:18:07,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [187804081] [2020-04-18 20:18:07,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-04-18 20:18:07,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:18:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-04-18 20:18:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3965, Invalid=9841, Unknown=0, NotChecked=0, Total=13806 [2020-04-18 20:18:07,080 INFO L87 Difference]: Start difference. First operand 843 states and 1656 transitions. Second operand 51 states. [2020-04-18 20:18:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:07,605 INFO L93 Difference]: Finished difference Result 911 states and 1784 transitions. [2020-04-18 20:18:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-04-18 20:18:07,606 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 145 [2020-04-18 20:18:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:18:07,611 INFO L225 Difference]: With dead ends: 911 [2020-04-18 20:18:07,611 INFO L226 Difference]: Without dead ends: 911 [2020-04-18 20:18:07,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3965, Invalid=9841, Unknown=0, NotChecked=0, Total=13806 [2020-04-18 20:18:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2020-04-18 20:18:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 878. [2020-04-18 20:18:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-04-18 20:18:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1726 transitions. [2020-04-18 20:18:07,627 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1726 transitions. Word has length 145 [2020-04-18 20:18:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:18:07,627 INFO L479 AbstractCegarLoop]: Abstraction has 878 states and 1726 transitions. [2020-04-18 20:18:07,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-04-18 20:18:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1726 transitions. [2020-04-18 20:18:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-04-18 20:18:07,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:18:07,629 INFO L425 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:18:07,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:18:07,833 INFO L427 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:18:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1142834382, now seen corresponding path program 45 times [2020-04-18 20:18:07,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:18:07,835 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1188915586] [2020-04-18 20:18:07,837 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:07,858 INFO L259 McrAutomatonBuilder]: Finished intersection with 865 states and 1578 transitions. [2020-04-18 20:18:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states. [2020-04-18 20:18:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-04-18 20:18:07,863 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:18:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1131803578, now seen corresponding path program 46 times [2020-04-18 20:18:07,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:18:07,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567404196] [2020-04-18 20:18:07,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:18:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:18:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:08,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567404196] [2020-04-18 20:18:08,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821948484] [2020-04-18 20:18:08,971 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 20:18:09,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:18:09,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:18:09,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 48 conjunts are in the unsatisfiable core [2020-04-18 20:18:09,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:18:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:09,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:18:09,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 51 [2020-04-18 20:18:09,125 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:18:09,148 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:09,280 INFO L259 McrAutomatonBuilder]: Finished intersection with 285 states and 418 transitions. [2020-04-18 20:18:09,280 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:18:10,298 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 60 times. [2020-04-18 20:18:10,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 20:18:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=2484, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 20:18:10,299 INFO L87 Difference]: Start difference. First operand 865 states. Second operand 57 states. [2020-04-18 20:18:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:26,738 INFO L93 Difference]: Finished difference Result 1425 states and 2586 transitions. [2020-04-18 20:18:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2586 transitions. [2020-04-18 20:18:26,740 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:18:26,741 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1188915586] [2020-04-18 20:18:26,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:26,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-04-18 20:18:26,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1188915586] [2020-04-18 20:18:26,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-04-18 20:18:26,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:18:26,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 20:18:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7520, Invalid=21550, Unknown=0, NotChecked=0, Total=29070 [2020-04-18 20:18:26,744 INFO L87 Difference]: Start difference. First operand 878 states and 1726 transitions. Second operand 57 states. [2020-04-18 20:18:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:31,358 INFO L93 Difference]: Finished difference Result 1795 states and 3559 transitions. [2020-04-18 20:18:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2020-04-18 20:18:31,359 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 150 [2020-04-18 20:18:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:18:31,366 INFO L225 Difference]: With dead ends: 1795 [2020-04-18 20:18:31,366 INFO L226 Difference]: Without dead ends: 1795 [2020-04-18 20:18:31,369 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19030 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=14067, Invalid=42815, Unknown=0, NotChecked=0, Total=56882 [2020-04-18 20:18:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-04-18 20:18:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 913. [2020-04-18 20:18:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-04-18 20:18:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1796 transitions. [2020-04-18 20:18:31,396 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1796 transitions. Word has length 150 [2020-04-18 20:18:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:18:31,396 INFO L479 AbstractCegarLoop]: Abstraction has 913 states and 1796 transitions. [2020-04-18 20:18:31,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-04-18 20:18:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1796 transitions. [2020-04-18 20:18:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-04-18 20:18:31,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:18:31,398 INFO L425 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:18:31,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:18:31,599 INFO L427 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:18:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 547006714, now seen corresponding path program 47 times [2020-04-18 20:18:31,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:18:31,600 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1765878397] [2020-04-18 20:18:31,602 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:31,625 INFO L259 McrAutomatonBuilder]: Finished intersection with 900 states and 1643 transitions. [2020-04-18 20:18:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states. [2020-04-18 20:18:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-04-18 20:18:31,631 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:18:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -615171208, now seen corresponding path program 48 times [2020-04-18 20:18:31,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:18:31,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437477678] [2020-04-18 20:18:31,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:18:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:18:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:32,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437477678] [2020-04-18 20:18:32,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747738702] [2020-04-18 20:18:32,488 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 20:18:32,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:18:32,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:18:32,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:18:32,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:18:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-04-18 20:18:32,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:32,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [51] total 52 [2020-04-18 20:18:32,571 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:18:32,588 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:32,791 INFO L259 McrAutomatonBuilder]: Finished intersection with 295 states and 433 transitions. [2020-04-18 20:18:32,791 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:18:33,664 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 55 times. [2020-04-18 20:18:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-18 20:18:33,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 20:18:33,666 INFO L87 Difference]: Start difference. First operand 900 states. Second operand 55 states. [2020-04-18 20:18:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:38,440 INFO L93 Difference]: Finished difference Result 900 states and 1643 transitions. [2020-04-18 20:18:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1643 transitions. [2020-04-18 20:18:38,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:18:38,442 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1765878397] [2020-04-18 20:18:38,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:38,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:18:38,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1765878397] [2020-04-18 20:18:38,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-04-18 20:18:38,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:18:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-04-18 20:18:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=11597, Unknown=0, NotChecked=0, Total=16256 [2020-04-18 20:18:38,445 INFO L87 Difference]: Start difference. First operand 913 states and 1796 transitions. Second operand 55 states. [2020-04-18 20:18:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:38,938 INFO L93 Difference]: Finished difference Result 981 states and 1924 transitions. [2020-04-18 20:18:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 20:18:38,938 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 155 [2020-04-18 20:18:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:18:38,944 INFO L225 Difference]: With dead ends: 981 [2020-04-18 20:18:38,944 INFO L226 Difference]: Without dead ends: 981 [2020-04-18 20:18:38,944 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4659, Invalid=11597, Unknown=0, NotChecked=0, Total=16256 [2020-04-18 20:18:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2020-04-18 20:18:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 948. [2020-04-18 20:18:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2020-04-18 20:18:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1866 transitions. [2020-04-18 20:18:38,957 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1866 transitions. Word has length 155 [2020-04-18 20:18:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:18:38,957 INFO L479 AbstractCegarLoop]: Abstraction has 948 states and 1866 transitions. [2020-04-18 20:18:38,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-04-18 20:18:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1866 transitions. [2020-04-18 20:18:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-04-18 20:18:38,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:18:38,960 INFO L425 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:18:39,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:18:39,163 INFO L427 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:18:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:39,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1588461490, now seen corresponding path program 49 times [2020-04-18 20:18:39,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:18:39,164 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1955814684] [2020-04-18 20:18:39,167 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:39,191 INFO L259 McrAutomatonBuilder]: Finished intersection with 935 states and 1708 transitions. [2020-04-18 20:18:39,194 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states. [2020-04-18 20:18:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-04-18 20:18:39,195 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:18:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -863913082, now seen corresponding path program 50 times [2020-04-18 20:18:39,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:18:39,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656648547] [2020-04-18 20:18:39,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:18:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:18:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:40,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656648547] [2020-04-18 20:18:40,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273853654] [2020-04-18 20:18:40,083 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 20:18:40,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:18:40,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:18:40,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:18:40,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:18:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-04-18 20:18:40,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:40,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [53] total 54 [2020-04-18 20:18:40,202 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:18:40,219 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:40,364 INFO L259 McrAutomatonBuilder]: Finished intersection with 305 states and 448 transitions. [2020-04-18 20:18:40,365 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:18:41,352 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 57 times. [2020-04-18 20:18:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 20:18:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=2448, Unknown=0, NotChecked=0, Total=3192 [2020-04-18 20:18:41,353 INFO L87 Difference]: Start difference. First operand 935 states. Second operand 57 states. [2020-04-18 20:18:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:46,499 INFO L93 Difference]: Finished difference Result 935 states and 1708 transitions. [2020-04-18 20:18:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1708 transitions. [2020-04-18 20:18:46,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:18:46,501 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1955814684] [2020-04-18 20:18:46,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:18:46,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:18:46,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1955814684] [2020-04-18 20:18:46,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-04-18 20:18:46,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:18:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-04-18 20:18:46,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5027, Invalid=12529, Unknown=0, NotChecked=0, Total=17556 [2020-04-18 20:18:46,503 INFO L87 Difference]: Start difference. First operand 948 states and 1866 transitions. Second operand 57 states. [2020-04-18 20:18:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:18:47,242 INFO L93 Difference]: Finished difference Result 1016 states and 1994 transitions. [2020-04-18 20:18:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-04-18 20:18:47,243 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 160 [2020-04-18 20:18:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:18:47,248 INFO L225 Difference]: With dead ends: 1016 [2020-04-18 20:18:47,248 INFO L226 Difference]: Without dead ends: 1016 [2020-04-18 20:18:47,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5027, Invalid=12529, Unknown=0, NotChecked=0, Total=17556 [2020-04-18 20:18:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2020-04-18 20:18:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 983. [2020-04-18 20:18:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 983 states. [2020-04-18 20:18:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1936 transitions. [2020-04-18 20:18:47,263 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1936 transitions. Word has length 160 [2020-04-18 20:18:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:18:47,263 INFO L479 AbstractCegarLoop]: Abstraction has 983 states and 1936 transitions. [2020-04-18 20:18:47,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-04-18 20:18:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1936 transitions. [2020-04-18 20:18:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-04-18 20:18:47,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:18:47,266 INFO L425 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:18:47,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:18:47,469 INFO L427 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:18:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1041030, now seen corresponding path program 51 times [2020-04-18 20:18:47,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:18:47,471 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [228435117] [2020-04-18 20:18:47,473 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:47,500 INFO L259 McrAutomatonBuilder]: Finished intersection with 970 states and 1773 transitions. [2020-04-18 20:18:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states. [2020-04-18 20:18:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-04-18 20:18:47,506 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:18:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:18:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 990450744, now seen corresponding path program 52 times [2020-04-18 20:18:47,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:18:47,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995969181] [2020-04-18 20:18:47,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:18:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:18:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:48,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995969181] [2020-04-18 20:18:48,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706658476] [2020-04-18 20:18:48,596 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 20:18:48,668 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:18:48,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:18:48,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 54 conjunts are in the unsatisfiable core [2020-04-18 20:18:48,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:18:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:18:48,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:18:48,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 57 [2020-04-18 20:18:48,741 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:18:48,760 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:18:49,011 INFO L259 McrAutomatonBuilder]: Finished intersection with 315 states and 463 transitions. [2020-04-18 20:18:49,011 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:18:50,138 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 66 times. [2020-04-18 20:18:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 20:18:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=873, Invalid=3033, Unknown=0, NotChecked=0, Total=3906 [2020-04-18 20:18:50,139 INFO L87 Difference]: Start difference. First operand 970 states. Second operand 63 states. [2020-04-18 20:19:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:10,218 INFO L93 Difference]: Finished difference Result 1605 states and 2916 transitions. [2020-04-18 20:19:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2916 transitions. [2020-04-18 20:19:10,220 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:19:10,220 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [228435117] [2020-04-18 20:19:10,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:19:10,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-04-18 20:19:10,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [228435117] [2020-04-18 20:19:10,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-04-18 20:19:10,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:19:10,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 20:19:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9509, Invalid=27163, Unknown=0, NotChecked=0, Total=36672 [2020-04-18 20:19:10,223 INFO L87 Difference]: Start difference. First operand 983 states and 1936 transitions. Second operand 63 states. [2020-04-18 20:19:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:15,937 INFO L93 Difference]: Finished difference Result 2005 states and 3979 transitions. [2020-04-18 20:19:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2020-04-18 20:19:15,938 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 165 [2020-04-18 20:19:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:19:15,947 INFO L225 Difference]: With dead ends: 2005 [2020-04-18 20:19:15,947 INFO L226 Difference]: Without dead ends: 2005 [2020-04-18 20:19:15,950 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24322 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=17808, Invalid=54284, Unknown=0, NotChecked=0, Total=72092 [2020-04-18 20:19:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2020-04-18 20:19:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1018. [2020-04-18 20:19:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2020-04-18 20:19:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 2006 transitions. [2020-04-18 20:19:15,970 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 2006 transitions. Word has length 165 [2020-04-18 20:19:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:19:15,970 INFO L479 AbstractCegarLoop]: Abstraction has 1018 states and 2006 transitions. [2020-04-18 20:19:15,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-04-18 20:19:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 2006 transitions. [2020-04-18 20:19:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-04-18 20:19:15,973 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:19:15,973 INFO L425 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:19:16,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:19:16,176 INFO L427 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:19:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -609133618, now seen corresponding path program 53 times [2020-04-18 20:19:16,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:19:16,178 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1623895906] [2020-04-18 20:19:16,180 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:16,208 INFO L259 McrAutomatonBuilder]: Finished intersection with 1005 states and 1838 transitions. [2020-04-18 20:19:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states. [2020-04-18 20:19:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-04-18 20:19:16,214 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:19:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash 588733126, now seen corresponding path program 54 times [2020-04-18 20:19:16,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:19:16,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526790916] [2020-04-18 20:19:16,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:19:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:19:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:19:17,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526790916] [2020-04-18 20:19:17,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131311268] [2020-04-18 20:19:17,319 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 20:19:17,368 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:19:17,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:19:17,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:19:17,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:19:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-04-18 20:19:17,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:19:17,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [57] total 58 [2020-04-18 20:19:17,439 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:19:17,459 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:17,619 INFO L259 McrAutomatonBuilder]: Finished intersection with 325 states and 478 transitions. [2020-04-18 20:19:17,619 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:19:18,713 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 61 times. [2020-04-18 20:19:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-04-18 20:19:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2804, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 20:19:18,714 INFO L87 Difference]: Start difference. First operand 1005 states. Second operand 61 states. [2020-04-18 20:19:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:24,670 INFO L93 Difference]: Finished difference Result 1005 states and 1838 transitions. [2020-04-18 20:19:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1838 transitions. [2020-04-18 20:19:24,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:19:24,672 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1623895906] [2020-04-18 20:19:24,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:19:24,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:19:24,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1623895906] [2020-04-18 20:19:24,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-04-18 20:19:24,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:19:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-04-18 20:19:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5805, Invalid=14501, Unknown=0, NotChecked=0, Total=20306 [2020-04-18 20:19:24,674 INFO L87 Difference]: Start difference. First operand 1018 states and 2006 transitions. Second operand 61 states. [2020-04-18 20:19:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:25,490 INFO L93 Difference]: Finished difference Result 1086 states and 2134 transitions. [2020-04-18 20:19:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-04-18 20:19:25,490 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 170 [2020-04-18 20:19:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:19:25,495 INFO L225 Difference]: With dead ends: 1086 [2020-04-18 20:19:25,495 INFO L226 Difference]: Without dead ends: 1086 [2020-04-18 20:19:25,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4530 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5805, Invalid=14501, Unknown=0, NotChecked=0, Total=20306 [2020-04-18 20:19:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2020-04-18 20:19:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1053. [2020-04-18 20:19:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1053 states. [2020-04-18 20:19:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2076 transitions. [2020-04-18 20:19:25,510 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2076 transitions. Word has length 170 [2020-04-18 20:19:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:19:25,510 INFO L479 AbstractCegarLoop]: Abstraction has 1053 states and 2076 transitions. [2020-04-18 20:19:25,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-04-18 20:19:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2076 transitions. [2020-04-18 20:19:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-04-18 20:19:25,512 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:19:25,512 INFO L425 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:19:25,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:19:25,713 INFO L427 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:19:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1940000262, now seen corresponding path program 55 times [2020-04-18 20:19:25,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:19:25,714 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1002471751] [2020-04-18 20:19:25,717 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:25,747 INFO L259 McrAutomatonBuilder]: Finished intersection with 1040 states and 1903 transitions. [2020-04-18 20:19:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states. [2020-04-18 20:19:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-04-18 20:19:25,752 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:19:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2035612920, now seen corresponding path program 56 times [2020-04-18 20:19:25,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:19:25,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617389519] [2020-04-18 20:19:25,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:19:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:19:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:19:27,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617389519] [2020-04-18 20:19:27,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302382162] [2020-04-18 20:19:27,183 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 20:19:27,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 20:19:27,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:19:27,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:19:27,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:19:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2020-04-18 20:19:27,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:19:27,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [59] total 60 [2020-04-18 20:19:27,315 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:19:27,348 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:27,849 INFO L259 McrAutomatonBuilder]: Finished intersection with 335 states and 493 transitions. [2020-04-18 20:19:27,849 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:19:29,563 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 63 times. [2020-04-18 20:19:29,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 20:19:29,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2020-04-18 20:19:29,565 INFO L87 Difference]: Start difference. First operand 1040 states. Second operand 63 states. [2020-04-18 20:19:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:35,934 INFO L93 Difference]: Finished difference Result 1040 states and 1903 transitions. [2020-04-18 20:19:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1903 transitions. [2020-04-18 20:19:35,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:19:35,936 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1002471751] [2020-04-18 20:19:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:19:35,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 20:19:35,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1002471751] [2020-04-18 20:19:35,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-04-18 20:19:35,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:19:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-04-18 20:19:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6215, Invalid=15541, Unknown=0, NotChecked=0, Total=21756 [2020-04-18 20:19:35,938 INFO L87 Difference]: Start difference. First operand 1053 states and 2076 transitions. Second operand 63 states. [2020-04-18 20:19:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:19:36,805 INFO L93 Difference]: Finished difference Result 1121 states and 2204 transitions. [2020-04-18 20:19:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-04-18 20:19:36,806 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 175 [2020-04-18 20:19:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:19:36,809 INFO L225 Difference]: With dead ends: 1121 [2020-04-18 20:19:36,809 INFO L226 Difference]: Without dead ends: 1121 [2020-04-18 20:19:36,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4866 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6215, Invalid=15541, Unknown=0, NotChecked=0, Total=21756 [2020-04-18 20:19:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-04-18 20:19:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1088. [2020-04-18 20:19:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1088 states. [2020-04-18 20:19:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2146 transitions. [2020-04-18 20:19:36,826 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2146 transitions. Word has length 175 [2020-04-18 20:19:36,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:19:36,826 INFO L479 AbstractCegarLoop]: Abstraction has 1088 states and 2146 transitions. [2020-04-18 20:19:36,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-04-18 20:19:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2146 transitions. [2020-04-18 20:19:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-04-18 20:19:36,829 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:19:36,829 INFO L425 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:19:37,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:19:37,030 INFO L427 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:19:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1456187570, now seen corresponding path program 57 times [2020-04-18 20:19:37,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:19:37,031 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [295646422] [2020-04-18 20:19:37,034 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:37,081 INFO L259 McrAutomatonBuilder]: Finished intersection with 1075 states and 1968 transitions. [2020-04-18 20:19:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states. [2020-04-18 20:19:37,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-04-18 20:19:37,085 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:19:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:19:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1201596934, now seen corresponding path program 58 times [2020-04-18 20:19:37,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:19:37,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910912838] [2020-04-18 20:19:37,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:19:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:19:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:19:38,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910912838] [2020-04-18 20:19:38,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433317101] [2020-04-18 20:19:38,262 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 20:19:38,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 20:19:38,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:19:38,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 60 conjunts are in the unsatisfiable core [2020-04-18 20:19:38,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:19:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:19:38,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 20:19:38,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 63 [2020-04-18 20:19:38,406 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:19:38,436 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:19:38,620 INFO L259 McrAutomatonBuilder]: Finished intersection with 345 states and 508 transitions. [2020-04-18 20:19:38,620 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:19:39,945 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 72 times. [2020-04-18 20:19:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-04-18 20:19:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=3636, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 20:19:39,947 INFO L87 Difference]: Start difference. First operand 1075 states. Second operand 69 states. [2020-04-18 20:20:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:20:04,278 INFO L93 Difference]: Finished difference Result 1785 states and 3246 transitions. [2020-04-18 20:20:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3246 transitions. [2020-04-18 20:20:04,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 20:20:04,282 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [295646422] [2020-04-18 20:20:04,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:20:04,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-04-18 20:20:04,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [295646422] [2020-04-18 20:20:04,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-04-18 20:20:04,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 20:20:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-04-18 20:20:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11732, Invalid=33424, Unknown=0, NotChecked=0, Total=45156 [2020-04-18 20:20:04,284 INFO L87 Difference]: Start difference. First operand 1088 states and 2146 transitions. Second operand 69 states. [2020-04-18 20:20:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 20:20:11,193 INFO L93 Difference]: Finished difference Result 2215 states and 4399 transitions. [2020-04-18 20:20:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2020-04-18 20:20:11,194 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 180 [2020-04-18 20:20:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 20:20:11,199 INFO L225 Difference]: With dead ends: 2215 [2020-04-18 20:20:11,200 INFO L226 Difference]: Without dead ends: 2215 [2020-04-18 20:20:11,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30262 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=21990, Invalid=67112, Unknown=0, NotChecked=0, Total=89102 [2020-04-18 20:20:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-04-18 20:20:11,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1123. [2020-04-18 20:20:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1123 states. [2020-04-18 20:20:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 2216 transitions. [2020-04-18 20:20:11,223 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 2216 transitions. Word has length 180 [2020-04-18 20:20:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 20:20:11,224 INFO L479 AbstractCegarLoop]: Abstraction has 1123 states and 2216 transitions. [2020-04-18 20:20:11,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-04-18 20:20:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 2216 transitions. [2020-04-18 20:20:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-04-18 20:20:11,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 20:20:11,227 INFO L425 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:20:11,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:20:11,431 INFO L427 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 20:20:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:20:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash 183248506, now seen corresponding path program 59 times [2020-04-18 20:20:11,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 20:20:11,432 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [36448905] [2020-04-18 20:20:11,434 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:20:11,467 INFO L259 McrAutomatonBuilder]: Finished intersection with 1110 states and 2033 transitions. [2020-04-18 20:20:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states. [2020-04-18 20:20:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-04-18 20:20:11,472 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 20:20:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 20:20:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2090535496, now seen corresponding path program 60 times [2020-04-18 20:20:11,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 20:20:11,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220182312] [2020-04-18 20:20:11,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 20:20:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 20:20:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 20:20:13,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220182312] [2020-04-18 20:20:13,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661840165] [2020-04-18 20:20:13,007 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 20:20:13,098 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 20:20:13,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 20:20:13,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 20:20:13,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 20:20:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-04-18 20:20:13,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 20:20:13,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [63] total 64 [2020-04-18 20:20:13,154 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 20:20:13,195 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 20:20:13,483 INFO L259 McrAutomatonBuilder]: Finished intersection with 355 states and 523 transitions. [2020-04-18 20:20:13,483 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 20:20:14,801 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 67 times. [2020-04-18 20:20:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-04-18 20:20:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3383, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 20:20:14,802 INFO L87 Difference]: Start difference. First operand 1110 states. Second operand 67 states. Received shutdown request... [2020-04-18 20:20:20,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 20:20:20,742 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 20:20:20,748 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 20:20:20,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 08:20:20 BasicIcfg [2020-04-18 20:20:20,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 20:20:20,751 INFO L168 Benchmark]: Toolchain (without parser) took 246428.72 ms. Allocated memory was 144.2 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 100.9 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 177.0 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,751 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 724.05 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 99.0 MB in the beginning and 158.6 MB in the end (delta: -59.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 200.8 MB. Free memory was 158.6 MB in the beginning and 156.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,752 INFO L168 Benchmark]: Boogie Preprocessor took 41.13 ms. Allocated memory is still 200.8 MB. Free memory was 156.5 MB in the beginning and 155.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,753 INFO L168 Benchmark]: RCFGBuilder took 461.30 ms. Allocated memory is still 200.8 MB. Free memory was 155.1 MB in the beginning and 133.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,753 INFO L168 Benchmark]: TraceAbstraction took 245114.33 ms. Allocated memory was 200.8 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 133.0 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 152.6 MB. Max. memory is 7.1 GB. [2020-04-18 20:20:20,755 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 724.05 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 99.0 MB in the beginning and 158.6 MB in the end (delta: -59.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 200.8 MB. Free memory was 158.6 MB in the beginning and 156.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.13 ms. Allocated memory is still 200.8 MB. Free memory was 156.5 MB in the beginning and 155.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.30 ms. Allocated memory is still 200.8 MB. Free memory was 155.1 MB in the beginning and 133.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 245114.33 ms. Allocated memory was 200.8 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 133.0 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 152.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 695]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 695). Cancelled while BasicCegarLoop was analyzing trace of length 186 with TraceHistMax 30,while PredicateComparison was comparing new predicate (quantifier-free) to 144 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 245.0s, OverallIterations: 32, TraceHistogramMax: 30, AutomataDifference: 39.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1779 SDtfs, 18816 SDslu, 46271 SDs, 0 SdLazy, 13817 SolverSat, 1851 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14345 GetRequests, 11200 SyntacticMatches, 0 SemanticMatches, 3145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147124 ImplicationChecksByTransitivity, 87.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1123occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 31 MinimizatonAttempts, 6911 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown