/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-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:34:14,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:34:14,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:34:14,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:34:14,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:34:14,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:34:14,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:34:14,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:34:14,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:34:14,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:34:14,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:34:14,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:34:14,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:34:14,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:34:14,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:34:14,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:34:14,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:34:14,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:34:14,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:34:15,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:34:15,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:34:15,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:34:15,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:34:15,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:34:15,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:34:15,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:34:15,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:34:15,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:34:15,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:34:15,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:34:15,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:34:15,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:34:15,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:34:15,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:34:15,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:34:15,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:34:15,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:34:15,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:34:15,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:34:15,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:34:15,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:34:15,019 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-SemanticLbe-McrStrategy.epf [2020-04-18 07:34:15,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:34:15,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:34:15,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:34:15,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:34:15,035 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:34:15,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:34:15,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:34:15,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:34:15,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:34:15,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:34:15,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:34:15,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:34:15,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:34:15,037 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:34:15,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:34:15,038 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:34:15,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:34:15,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:34:15,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:34:15,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:34:15,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:34:15,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:34:15,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:34:15,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:34:15,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:34:15,040 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:34:15,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:34:15,040 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:34:15,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:34:15,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:34:15,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:34:15,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:34:15,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:34:15,332 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:34:15,332 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:34:15,333 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-04-18 07:34:15,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f4edde6/d9049e5bd55d458a8f13a2735dcdae9b/FLAG6a91b6591 [2020-04-18 07:34:15,985 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:34:15,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-04-18 07:34:15,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f4edde6/d9049e5bd55d458a8f13a2735dcdae9b/FLAG6a91b6591 [2020-04-18 07:34:16,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47f4edde6/d9049e5bd55d458a8f13a2735dcdae9b [2020-04-18 07:34:16,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:34:16,258 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:34:16,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:34:16,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:34:16,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:34:16,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:16,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae05a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16, skipping insertion in model container [2020-04-18 07:34:16,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:16,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:34:16,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:34:16,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:34:16,850 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:34:16,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:34:16,965 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:34:16,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16 WrapperNode [2020-04-18 07:34:16,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:34:16,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:34:16,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:34:16,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:34:16,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:16,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:34:17,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:34:17,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:34:17,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:34:17,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (1/1) ... [2020-04-18 07:34:17,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:34:17,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:34:17,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:34:17,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:34:17,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (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 07:34:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:34:17,109 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:34:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:34:17,109 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:34:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:34:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:34:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:34:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:34:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:34:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:34:17,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:34:17,112 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 07:34:17,466 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:34:17,466 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:34:17,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:34:17 BoogieIcfgContainer [2020-04-18 07:34:17,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:34:17,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:34:17,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:34:17,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:34:17,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:34:16" (1/3) ... [2020-04-18 07:34:17,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16633068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:34:17, skipping insertion in model container [2020-04-18 07:34:17,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:16" (2/3) ... [2020-04-18 07:34:17,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16633068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:34:17, skipping insertion in model container [2020-04-18 07:34:17,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:34:17" (3/3) ... [2020-04-18 07:34:17,477 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-04-18 07:34:17,486 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:34:17,487 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:34:17,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:34:17,494 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:34:17,515 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,516 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,516 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,517 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,517 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,517 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,518 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,518 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,518 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,519 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,519 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,519 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,519 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,520 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,520 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,520 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,521 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,521 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,521 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,521 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,522 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,522 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,522 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,523 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,523 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,523 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,523 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,524 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,527 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,527 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,528 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,528 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,528 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,528 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,534 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,534 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,535 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,535 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,535 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,535 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:17,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:34:17,573 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:34:17,573 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:34:17,573 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:34:17,573 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:34:17,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:34:17,574 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:34:17,574 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:34:17,574 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:34:17,588 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:17,590 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:17,629 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 07:34:17,629 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:34:17,635 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 07:34:17,640 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:17,658 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 07:34:17,659 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:34:17,660 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 07:34:17,662 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-18 07:34:17,663 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:34:18,839 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-18 07:34:19,091 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-18 07:34:19,092 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-18 07:34:19,095 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-18 07:34:19,104 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:34:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:34:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:34:19,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:19,115 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:34:19,115 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-18 07:34:19,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:19,138 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [87405737] [2020-04-18 07:34:19,151 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,162 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:34:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:34:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:34:19,164 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 2 times [2020-04-18 07:34:19,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:19,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726667063] [2020-04-18 07:34:19,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:19,480 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 07:34:19,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726667063] [2020-04-18 07:34:19,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:19,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:34:19,486 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:19,489 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,492 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:34:19,493 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:19,510 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:34:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:34:19,517 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:34:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:19,539 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:34:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:34:19,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:19,542 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [87405737] [2020-04-18 07:34:19,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:19,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:34:19,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [87405737] [2020-04-18 07:34:19,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:34:19,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:34:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:34:19,562 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:34:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:19,624 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-18 07:34:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:34:19,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:34:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:19,637 INFO L225 Difference]: With dead ends: 75 [2020-04-18 07:34:19,637 INFO L226 Difference]: Without dead ends: 42 [2020-04-18 07:34:19,638 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:34:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-18 07:34:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-18 07:34:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:34:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-18 07:34:19,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-18 07:34:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:19,680 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-18 07:34:19,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:34:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-18 07:34:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:34:19,681 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:19,681 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:19,681 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-18 07:34:19,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:19,682 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1607753866] [2020-04-18 07:34:19,683 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,684 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:34:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:34:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:34:19,685 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:19,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 2 times [2020-04-18 07:34:19,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:19,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839132035] [2020-04-18 07:34:19,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:19,769 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 07:34:19,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839132035] [2020-04-18 07:34:19,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:19,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:34:19,770 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:19,771 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,773 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:34:19,774 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:19,796 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:34:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:34:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:34:19,797 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:34:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:19,814 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2020-04-18 07:34:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-04-18 07:34:19,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:19,815 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1607753866] [2020-04-18 07:34:19,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:19,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:34:19,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1607753866] [2020-04-18 07:34:19,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 07:34:19,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:34:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:34:19,818 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-18 07:34:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:19,840 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-18 07:34:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-18 07:34:19,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-18 07:34:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:19,843 INFO L225 Difference]: With dead ends: 56 [2020-04-18 07:34:19,843 INFO L226 Difference]: Without dead ends: 50 [2020-04-18 07:34:19,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:34:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-18 07:34:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-18 07:34:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:34:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-18 07:34:19,852 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-18 07:34:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:19,854 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-18 07:34:19,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 07:34:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-18 07:34:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:34:19,855 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:19,855 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:19,855 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-18 07:34:19,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:19,856 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [39876152] [2020-04-18 07:34:19,857 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,859 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:34:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:34:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:34:19,860 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 2 times [2020-04-18 07:34:19,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:19,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70271713] [2020-04-18 07:34:19,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:19,962 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 07:34:19,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70271713] [2020-04-18 07:34:19,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:19,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:19,963 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:19,965 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:19,970 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:34:19,970 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:19,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:20,017 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:20,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:20,018 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-04-18 07:34:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,133 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2020-04-18 07:34:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 68 transitions. [2020-04-18 07:34:20,134 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:20,134 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [39876152] [2020-04-18 07:34:20,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:20,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:34:20,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [39876152] [2020-04-18 07:34:20,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 07:34:20,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:34:20,136 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-04-18 07:34:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,213 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-04-18 07:34:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 07:34:20,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-04-18 07:34:20,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:20,216 INFO L225 Difference]: With dead ends: 62 [2020-04-18 07:34:20,216 INFO L226 Difference]: Without dead ends: 44 [2020-04-18 07:34:20,217 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:34:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-04-18 07:34:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-04-18 07:34:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-18 07:34:20,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-18 07:34:20,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-04-18 07:34:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:20,223 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-18 07:34:20,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 07:34:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-18 07:34:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:34:20,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:20,224 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:20,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 3 times [2020-04-18 07:34:20,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:20,225 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1142311766] [2020-04-18 07:34:20,226 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:20,227 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:34:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:34:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:34:20,229 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 211005421, now seen corresponding path program 4 times [2020-04-18 07:34:20,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364544532] [2020-04-18 07:34:20,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:20,320 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 07:34:20,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364544532] [2020-04-18 07:34:20,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:20,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:20,321 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:20,322 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:20,324 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:34:20,324 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:20,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:20,373 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:20,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:20,373 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-04-18 07:34:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,493 INFO L93 Difference]: Finished difference Result 51 states and 95 transitions. [2020-04-18 07:34:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 95 transitions. [2020-04-18 07:34:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:34:20,494 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-18 07:34:20,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592011380] [2020-04-18 07:34:20,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:20,596 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 07:34:20,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592011380] [2020-04-18 07:34:20,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212459695] [2020-04-18 07:34:20,598 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 07:34:20,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:20,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:20,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:34:20,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:20,704 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 07:34:20,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:20,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 07:34:20,705 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:20,706 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:20,708 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:34:20,709 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:20,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:20,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:20,808 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:34:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:34:20,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-18 07:34:20,809 INFO L87 Difference]: Start difference. First operand 51 states and 95 transitions. Second operand 8 states. [2020-04-18 07:34:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,958 INFO L93 Difference]: Finished difference Result 64 states and 107 transitions. [2020-04-18 07:34:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 107 transitions. [2020-04-18 07:34:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:34:20,959 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 6 times [2020-04-18 07:34:20,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729071353] [2020-04-18 07:34:20,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:21,049 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 07:34:21,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729071353] [2020-04-18 07:34:21,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079228770] [2020-04-18 07:34:21,050 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 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 07:34:21,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:34:21,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:21,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:34:21,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:21,116 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 07:34:21,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:21,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 07:34:21,117 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:21,118 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:21,121 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:34:21,121 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:21,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:21,163 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:21,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:34:21,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:21,164 INFO L87 Difference]: Start difference. First operand 64 states and 107 transitions. Second operand 8 states. [2020-04-18 07:34:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:21,334 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-04-18 07:34:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 108 transitions. [2020-04-18 07:34:21,335 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:21,335 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1142311766] [2020-04-18 07:34:21,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:21,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:34:21,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1142311766] [2020-04-18 07:34:21,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:34:21,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:34:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:34:21,338 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 16 states. [2020-04-18 07:34:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:21,456 INFO L93 Difference]: Finished difference Result 78 states and 191 transitions. [2020-04-18 07:34:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 07:34:21,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2020-04-18 07:34:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:21,457 INFO L225 Difference]: With dead ends: 78 [2020-04-18 07:34:21,457 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:34:21,458 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:34:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:34:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-18 07:34:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-18 07:34:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-18 07:34:21,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 11 [2020-04-18 07:34:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:21,465 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-18 07:34:21,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:34:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-18 07:34:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:34:21,466 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:21,466 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:21,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:21,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 7 times [2020-04-18 07:34:21,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:21,882 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [565221229] [2020-04-18 07:34:21,883 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:21,884 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:34:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:34:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:34:21,886 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:21,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:21,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1480255448, now seen corresponding path program 8 times [2020-04-18 07:34:21,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:21,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656344753] [2020-04-18 07:34:21,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:21,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656344753] [2020-04-18 07:34:21,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:21,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:21,964 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:21,965 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:21,967 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:34:21,967 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:21,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:21,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:22,005 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:22,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:22,006 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 7 states. [2020-04-18 07:34:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:22,129 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2020-04-18 07:34:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2020-04-18 07:34:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:34:22,130 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-18 07:34:22,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:22,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129455874] [2020-04-18 07:34:22,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:22,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129455874] [2020-04-18 07:34:22,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761719195] [2020-04-18 07:34:22,195 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:22,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:34:22,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:22,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:22,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:22,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:22,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:22,258 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:22,259 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:22,261 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:34:22,261 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:22,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:22,291 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:22,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:34:22,292 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand 9 states. [2020-04-18 07:34:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:22,416 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-04-18 07:34:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2020-04-18 07:34:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:34:22,417 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 10 times [2020-04-18 07:34:22,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:22,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332089877] [2020-04-18 07:34:22,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:22,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332089877] [2020-04-18 07:34:22,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404466417] [2020-04-18 07:34:22,493 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 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 07:34:22,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:22,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:22,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:22,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:22,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:22,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:22,572 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:22,573 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:22,575 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:34:22,575 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:22,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:22,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:22,623 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:34:22,624 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand 9 states. [2020-04-18 07:34:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:22,830 INFO L93 Difference]: Finished difference Result 83 states and 158 transitions. [2020-04-18 07:34:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2020-04-18 07:34:22,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:22,831 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [565221229] [2020-04-18 07:34:22,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:22,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:34:22,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [565221229] [2020-04-18 07:34:22,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:34:22,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:34:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:34:22,835 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 12 states. [2020-04-18 07:34:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:22,938 INFO L93 Difference]: Finished difference Result 70 states and 171 transitions. [2020-04-18 07:34:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 07:34:22,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-04-18 07:34:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:22,940 INFO L225 Difference]: With dead ends: 70 [2020-04-18 07:34:22,940 INFO L226 Difference]: Without dead ends: 58 [2020-04-18 07:34:22,941 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:34:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-18 07:34:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-04-18 07:34:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:34:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-18 07:34:22,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 12 [2020-04-18 07:34:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:22,954 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-18 07:34:22,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:34:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-18 07:34:22,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:22,955 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:22,955 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:23,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:23,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 11 times [2020-04-18 07:34:23,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:23,363 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1624064041] [2020-04-18 07:34:23,364 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:23,365 INFO L259 McrAutomatonBuilder]: Finished intersection with 87 states and 190 transitions. [2020-04-18 07:34:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-04-18 07:34:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:23,367 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1378156957, now seen corresponding path program 12 times [2020-04-18 07:34:23,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:23,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685658148] [2020-04-18 07:34:23,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:23,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685658148] [2020-04-18 07:34:23,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:23,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:23,457 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:23,458 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:23,462 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-04-18 07:34:23,462 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:23,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:23,500 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:23,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:23,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:23,501 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-04-18 07:34:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:23,640 INFO L93 Difference]: Finished difference Result 123 states and 265 transitions. [2020-04-18 07:34:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 265 transitions. [2020-04-18 07:34:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:23,641 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 891297657, now seen corresponding path program 13 times [2020-04-18 07:34:23,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:23,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611508877] [2020-04-18 07:34:23,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:23,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611508877] [2020-04-18 07:34:23,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881857429] [2020-04-18 07:34:23,708 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 07:34:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:23,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:23,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:23,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:23,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:23,781 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:23,782 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:23,785 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:34:23,785 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:23,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:23,823 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:34:23,824 INFO L87 Difference]: Start difference. First operand 123 states and 265 transitions. Second operand 9 states. [2020-04-18 07:34:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:24,025 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2020-04-18 07:34:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-04-18 07:34:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:24,027 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:24,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1405192407, now seen corresponding path program 14 times [2020-04-18 07:34:24,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:24,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655374940] [2020-04-18 07:34:24,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:24,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655374940] [2020-04-18 07:34:24,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412931192] [2020-04-18 07:34:24,094 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 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 07:34:24,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:24,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:24,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:24,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:24,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:24,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:24,180 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:24,182 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:24,184 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:34:24,184 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:24,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:24,236 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:34:24,237 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 9 states. [2020-04-18 07:34:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:24,447 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2020-04-18 07:34:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 337 transitions. [2020-04-18 07:34:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:24,448 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 15 times [2020-04-18 07:34:24,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:24,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724959946] [2020-04-18 07:34:24,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:24,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724959946] [2020-04-18 07:34:24,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643622233] [2020-04-18 07:34:24,543 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 07:34:24,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:24,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:24,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:24,626 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:24,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:24,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:24,643 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:24,644 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:24,646 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:34:24,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:24,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:24,683 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:24,683 INFO L87 Difference]: Start difference. First operand 162 states and 337 transitions. Second operand 11 states. [2020-04-18 07:34:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:24,907 INFO L93 Difference]: Finished difference Result 167 states and 342 transitions. [2020-04-18 07:34:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 342 transitions. [2020-04-18 07:34:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:24,908 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 16 times [2020-04-18 07:34:24,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:24,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617421554] [2020-04-18 07:34:24,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617421554] [2020-04-18 07:34:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624226996] [2020-04-18 07:34:24,994 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 07:34:25,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:25,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:25,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:25,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:25,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:25,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:25,075 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:25,076 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:25,078 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 07:34:25,078 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:25,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:25,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:25,081 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:25,082 INFO L87 Difference]: Start difference. First operand 167 states and 342 transitions. Second operand 11 states. [2020-04-18 07:34:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:25,330 INFO L93 Difference]: Finished difference Result 176 states and 355 transitions. [2020-04-18 07:34:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 355 transitions. [2020-04-18 07:34:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:25,331 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:25,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 17 times [2020-04-18 07:34:25,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:25,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901351390] [2020-04-18 07:34:25,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:25,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901351390] [2020-04-18 07:34:25,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361617856] [2020-04-18 07:34:25,420 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:25,475 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:25,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:25,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:25,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:25,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:25,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:25,490 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:25,491 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:25,495 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 07:34:25,495 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:25,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:25,554 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:25,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:25,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:34:25,555 INFO L87 Difference]: Start difference. First operand 176 states and 355 transitions. Second operand 11 states. [2020-04-18 07:34:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:25,822 INFO L93 Difference]: Finished difference Result 178 states and 357 transitions. [2020-04-18 07:34:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 357 transitions. [2020-04-18 07:34:25,823 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:25,823 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1624064041] [2020-04-18 07:34:25,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:25,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:34:25,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1624064041] [2020-04-18 07:34:25,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 07:34:25,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 07:34:25,839 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 17 states. [2020-04-18 07:34:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:25,972 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-18 07:34:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 07:34:25,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-18 07:34:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:25,973 INFO L225 Difference]: With dead ends: 74 [2020-04-18 07:34:25,973 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 07:34:25,974 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 28 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 07:34:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 07:34:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-04-18 07:34:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:34:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-18 07:34:25,979 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-04-18 07:34:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:25,979 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-18 07:34:25,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 07:34:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-18 07:34:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:25,980 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:25,980 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:26,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:26,987 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 18 times [2020-04-18 07:34:26,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:26,989 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1367829306] [2020-04-18 07:34:26,989 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:26,990 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 227 transitions. [2020-04-18 07:34:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-04-18 07:34:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:26,992 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 226807821, now seen corresponding path program 19 times [2020-04-18 07:34:26,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:26,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613954356] [2020-04-18 07:34:26,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 07:34:27,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613954356] [2020-04-18 07:34:27,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:27,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:27,035 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:27,037 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:27,040 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 49 transitions. [2020-04-18 07:34:27,040 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:27,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:27,080 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:27,081 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 7 states. [2020-04-18 07:34:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:27,214 INFO L93 Difference]: Finished difference Result 153 states and 339 transitions. [2020-04-18 07:34:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2020-04-18 07:34:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:27,215 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1860424119, now seen corresponding path program 20 times [2020-04-18 07:34:27,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:27,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314584694] [2020-04-18 07:34:27,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:34:27,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314584694] [2020-04-18 07:34:27,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584254777] [2020-04-18 07:34:27,289 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 07:34:27,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:27,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:27,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:27,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:34:27,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:27,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:27,347 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:27,348 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:27,351 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-04-18 07:34:27,351 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:27,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:27,381 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:27,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:27,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:34:27,382 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand 9 states. [2020-04-18 07:34:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:27,542 INFO L93 Difference]: Finished difference Result 189 states and 414 transitions. [2020-04-18 07:34:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 414 transitions. [2020-04-18 07:34:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:27,543 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:27,544 INFO L82 PathProgramCache]: Analyzing trace with hash 611292185, now seen corresponding path program 21 times [2020-04-18 07:34:27,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:27,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130575284] [2020-04-18 07:34:27,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:34:27,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130575284] [2020-04-18 07:34:27,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568327257] [2020-04-18 07:34:27,617 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:27,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:34:27,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:27,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:34:27,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:34:27,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:27,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:27,679 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:27,680 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:27,683 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 39 transitions. [2020-04-18 07:34:27,683 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:27,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:27,725 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:27,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:34:27,727 INFO L87 Difference]: Start difference. First operand 189 states and 414 transitions. Second operand 9 states. [2020-04-18 07:34:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:27,925 INFO L93 Difference]: Finished difference Result 213 states and 460 transitions. [2020-04-18 07:34:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 460 transitions. [2020-04-18 07:34:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:27,927 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 963815535, now seen corresponding path program 22 times [2020-04-18 07:34:27,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:27,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722008728] [2020-04-18 07:34:27,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722008728] [2020-04-18 07:34:28,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306081688] [2020-04-18 07:34:28,029 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 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 07:34:28,081 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:28,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:28,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:28,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:28,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:28,098 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:28,099 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:28,101 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 07:34:28,102 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:28,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:28,134 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:28,135 INFO L87 Difference]: Start difference. First operand 213 states and 460 transitions. Second operand 11 states. [2020-04-18 07:34:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:28,327 INFO L93 Difference]: Finished difference Result 223 states and 475 transitions. [2020-04-18 07:34:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 475 transitions. [2020-04-18 07:34:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:28,328 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:28,328 INFO L82 PathProgramCache]: Analyzing trace with hash 895431245, now seen corresponding path program 23 times [2020-04-18 07:34:28,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:28,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649119831] [2020-04-18 07:34:28,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649119831] [2020-04-18 07:34:28,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407329650] [2020-04-18 07:34:28,408 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 07:34:28,457 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:28,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:28,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:28,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:28,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:28,474 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:28,475 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:28,478 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 29 transitions. [2020-04-18 07:34:28,478 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:28,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:28,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:28,484 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:28,485 INFO L87 Difference]: Start difference. First operand 223 states and 475 transitions. Second operand 11 states. [2020-04-18 07:34:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:28,730 INFO L93 Difference]: Finished difference Result 239 states and 503 transitions. [2020-04-18 07:34:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 503 transitions. [2020-04-18 07:34:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:28,732 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1409325995, now seen corresponding path program 24 times [2020-04-18 07:34:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:28,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092388326] [2020-04-18 07:34:28,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092388326] [2020-04-18 07:34:28,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883841046] [2020-04-18 07:34:28,810 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:34:28,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:28,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:28,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:28,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:28,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:28,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:28,872 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:28,874 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:28,876 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 07:34:28,876 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:28,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:28,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:28,941 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:34:28,942 INFO L87 Difference]: Start difference. First operand 239 states and 503 transitions. Second operand 11 states. [2020-04-18 07:34:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:29,283 INFO L93 Difference]: Finished difference Result 246 states and 511 transitions. [2020-04-18 07:34:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 511 transitions. [2020-04-18 07:34:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:29,284 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:34:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 25 times [2020-04-18 07:34:29,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:29,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102544659] [2020-04-18 07:34:29,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102544659] [2020-04-18 07:34:29,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015294887] [2020-04-18 07:34:29,418 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 07:34:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:29,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:29,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:34:29,478 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:29,480 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:29,482 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:34:29,482 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:29,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:29,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:29,585 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:34:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:34:29,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:34:29,586 INFO L87 Difference]: Start difference. First operand 246 states and 511 transitions. Second operand 12 states. [2020-04-18 07:34:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:29,853 INFO L93 Difference]: Finished difference Result 345 states and 667 transitions. [2020-04-18 07:34:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 667 transitions. [2020-04-18 07:34:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:29,855 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:34:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 26 times [2020-04-18 07:34:29,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:29,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996342885] [2020-04-18 07:34:29,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996342885] [2020-04-18 07:34:29,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835881649] [2020-04-18 07:34:29,968 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:34:30,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:30,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:30,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:30,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:30,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:30,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:34:30,033 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:30,034 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:30,036 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:34:30,037 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:30,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,088 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:34:30,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:34:30,090 INFO L87 Difference]: Start difference. First operand 345 states and 667 transitions. Second operand 12 states. [2020-04-18 07:34:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:30,459 INFO L93 Difference]: Finished difference Result 431 states and 825 transitions. [2020-04-18 07:34:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 825 transitions. [2020-04-18 07:34:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:30,460 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:34:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 27 times [2020-04-18 07:34:30,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:30,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123624910] [2020-04-18 07:34:30,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:30,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123624910] [2020-04-18 07:34:30,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139164102] [2020-04-18 07:34:30,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 07:34:30,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 07:34:30,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:30,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:30,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:30,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:30,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:34:30,636 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:30,638 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:30,642 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:34:30,642 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:30,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,645 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:30,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:34:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:34:30,646 INFO L87 Difference]: Start difference. First operand 431 states and 825 transitions. Second operand 12 states. [2020-04-18 07:34:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:31,033 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 07:34:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 07:34:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:34:31,035 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:34:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 28 times [2020-04-18 07:34:31,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:31,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204377450] [2020-04-18 07:34:31,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:31,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204377450] [2020-04-18 07:34:31,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48453274] [2020-04-18 07:34:31,119 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 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 07:34:31,170 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:31,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:31,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:31,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:31,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:31,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:34:31,195 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:31,196 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:31,198 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:34:31,198 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:31,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:31,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:31,200 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:34:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:34:31,201 INFO L87 Difference]: Start difference. First operand 441 states and 836 transitions. Second operand 12 states. [2020-04-18 07:34:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:31,568 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 07:34:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 07:34:31,569 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:31,569 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1367829306] [2020-04-18 07:34:31,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:31,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-04-18 07:34:31,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1367829306] [2020-04-18 07:34:31,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 07:34:31,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:31,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 07:34:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:34:31,571 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 26 states. [2020-04-18 07:34:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:31,765 INFO L93 Difference]: Finished difference Result 94 states and 231 transitions. [2020-04-18 07:34:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 07:34:31,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 15 [2020-04-18 07:34:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:31,767 INFO L225 Difference]: With dead ends: 94 [2020-04-18 07:34:31,767 INFO L226 Difference]: Without dead ends: 70 [2020-04-18 07:34:31,769 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 312 SyntacticMatches, 60 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:34:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-18 07:34:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-04-18 07:34:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 07:34:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-18 07:34:31,779 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 15 [2020-04-18 07:34:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:31,779 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-18 07:34:31,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 07:34:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-18 07:34:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:31,780 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:31,780 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:33,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:33,585 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 29 times [2020-04-18 07:34:33,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:33,587 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [71650426] [2020-04-18 07:34:33,588 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:33,590 INFO L259 McrAutomatonBuilder]: Finished intersection with 122 states and 276 transitions. [2020-04-18 07:34:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-04-18 07:34:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:33,591 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:33,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1101535864, now seen corresponding path program 30 times [2020-04-18 07:34:33,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:33,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956485261] [2020-04-18 07:34:33,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:34:33,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956485261] [2020-04-18 07:34:33,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:33,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:33,643 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:33,644 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:33,647 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 56 transitions. [2020-04-18 07:34:33,648 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:33,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:33,683 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:33,684 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 7 states. [2020-04-18 07:34:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:33,814 INFO L93 Difference]: Finished difference Result 190 states and 431 transitions. [2020-04-18 07:34:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 431 transitions. [2020-04-18 07:34:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:33,815 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1559815134, now seen corresponding path program 31 times [2020-04-18 07:34:33,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:33,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100937073] [2020-04-18 07:34:33,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:33,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100937073] [2020-04-18 07:34:33,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981325084] [2020-04-18 07:34:33,899 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:33,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:33,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:33,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:33,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:33,965 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:33,968 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:34,001 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 44 transitions. [2020-04-18 07:34:34,001 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:34,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:34,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:34,034 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:34:34,035 INFO L87 Difference]: Start difference. First operand 190 states and 431 transitions. Second operand 9 states. [2020-04-18 07:34:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:34,184 INFO L93 Difference]: Finished difference Result 239 states and 538 transitions. [2020-04-18 07:34:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 538 transitions. [2020-04-18 07:34:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:34,186 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1486020228, now seen corresponding path program 32 times [2020-04-18 07:34:34,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:34,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486998594] [2020-04-18 07:34:34,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:34,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486998594] [2020-04-18 07:34:34,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653978895] [2020-04-18 07:34:34,239 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 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 07:34:34,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:34,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:34,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:34:34,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:34,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:34,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:34,328 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:34,330 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:34,334 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2020-04-18 07:34:34,334 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:34,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:34,372 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:34,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:34,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:34:34,374 INFO L87 Difference]: Start difference. First operand 239 states and 538 transitions. Second operand 9 states. [2020-04-18 07:34:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:34,566 INFO L93 Difference]: Finished difference Result 275 states and 613 transitions. [2020-04-18 07:34:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 613 transitions. [2020-04-18 07:34:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:34,567 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1838543578, now seen corresponding path program 33 times [2020-04-18 07:34:34,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:34,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920660570] [2020-04-18 07:34:34,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:34,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920660570] [2020-04-18 07:34:34,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291908391] [2020-04-18 07:34:34,651 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:34,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:34,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:34,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:34,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:34,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:34,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:34,722 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:34,723 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:34,725 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 07:34:34,725 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:34,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:34,752 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:34,752 INFO L87 Difference]: Start difference. First operand 275 states and 613 transitions. Second operand 11 states. [2020-04-18 07:34:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:34,983 INFO L93 Difference]: Finished difference Result 291 states and 641 transitions. [2020-04-18 07:34:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2020-04-18 07:34:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:34,985 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1770159288, now seen corresponding path program 34 times [2020-04-18 07:34:34,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:34,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650451868] [2020-04-18 07:34:34,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:35,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650451868] [2020-04-18 07:34:35,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506975099] [2020-04-18 07:34:35,065 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 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 07:34:35,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:35,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:35,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:35,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:35,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:35,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:35,125 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:35,126 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:35,128 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2020-04-18 07:34:35,128 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:35,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:35,130 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:35,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:35,131 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand 11 states. [2020-04-18 07:34:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:35,402 INFO L93 Difference]: Finished difference Result 316 states and 690 transitions. [2020-04-18 07:34:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 690 transitions. [2020-04-18 07:34:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:35,403 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:35,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2010913258, now seen corresponding path program 35 times [2020-04-18 07:34:35,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:35,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441368982] [2020-04-18 07:34:35,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:35,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441368982] [2020-04-18 07:34:35,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746814107] [2020-04-18 07:34:35,476 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 07:34:35,549 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:35,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:35,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:35,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:35,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:35,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:35,565 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:35,567 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:35,569 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 07:34:35,570 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:35,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:35,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:35,614 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:34:35,615 INFO L87 Difference]: Start difference. First operand 316 states and 690 transitions. Second operand 11 states. [2020-04-18 07:34:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:35,925 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2020-04-18 07:34:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 713 transitions. [2020-04-18 07:34:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:35,927 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:34:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 36 times [2020-04-18 07:34:35,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:35,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071681872] [2020-04-18 07:34:35,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:36,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071681872] [2020-04-18 07:34:36,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172080724] [2020-04-18 07:34:36,034 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 07:34:36,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:34:36,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:36,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:36,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:36,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:36,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:36,108 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:36,110 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:36,111 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-04-18 07:34:36,111 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:36,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:36,141 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:34:36,143 INFO L87 Difference]: Start difference. First operand 330 states and 713 transitions. Second operand 13 states. [2020-04-18 07:34:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:36,425 INFO L93 Difference]: Finished difference Result 335 states and 718 transitions. [2020-04-18 07:34:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 718 transitions. [2020-04-18 07:34:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:36,427 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:34:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 37 times [2020-04-18 07:34:36,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:36,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785069586] [2020-04-18 07:34:36,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785069586] [2020-04-18 07:34:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395636904] [2020-04-18 07:34:36,533 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 07:34:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:36,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:36,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:36,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:36,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:36,591 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:36,592 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:36,594 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:34:36,594 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:36,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:36,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:36,596 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:36,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:36,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:34:36,597 INFO L87 Difference]: Start difference. First operand 335 states and 718 transitions. Second operand 13 states. [2020-04-18 07:34:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:36,914 INFO L93 Difference]: Finished difference Result 340 states and 723 transitions. [2020-04-18 07:34:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 723 transitions. [2020-04-18 07:34:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:36,916 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:34:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 38 times [2020-04-18 07:34:36,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:36,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913657326] [2020-04-18 07:34:36,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:37,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913657326] [2020-04-18 07:34:37,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216414919] [2020-04-18 07:34:37,018 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 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 07:34:37,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:37,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:37,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:37,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:37,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:37,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:37,129 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:37,132 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:37,137 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:34:37,137 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:37,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:37,191 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:37,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:34:37,192 INFO L87 Difference]: Start difference. First operand 340 states and 723 transitions. Second operand 13 states. [2020-04-18 07:34:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:37,687 INFO L93 Difference]: Finished difference Result 349 states and 736 transitions. [2020-04-18 07:34:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 736 transitions. [2020-04-18 07:34:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:34:37,688 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:34:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 39 times [2020-04-18 07:34:37,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:37,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189010924] [2020-04-18 07:34:37,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189010924] [2020-04-18 07:34:37,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300786168] [2020-04-18 07:34:37,825 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:37,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 07:34:37,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:37,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:37,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:37,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:37,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:37,926 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:37,927 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:37,930 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:34:37,930 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:37,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:37,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:38,015 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:38,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 07:34:38,017 INFO L87 Difference]: Start difference. First operand 349 states and 736 transitions. Second operand 13 states. [2020-04-18 07:34:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:38,432 INFO L93 Difference]: Finished difference Result 351 states and 738 transitions. [2020-04-18 07:34:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 738 transitions. [2020-04-18 07:34:38,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:38,434 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [71650426] [2020-04-18 07:34:38,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:38,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 07:34:38,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [71650426] [2020-04-18 07:34:38,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 07:34:38,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:34:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:34:38,436 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 22 states. [2020-04-18 07:34:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:38,687 INFO L93 Difference]: Finished difference Result 86 states and 211 transitions. [2020-04-18 07:34:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 07:34:38,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-04-18 07:34:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:38,689 INFO L225 Difference]: With dead ends: 86 [2020-04-18 07:34:38,689 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 07:34:38,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 332 SyntacticMatches, 64 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:34:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 07:34:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-04-18 07:34:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:34:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-18 07:34:38,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 16 [2020-04-18 07:34:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:38,704 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-18 07:34:38,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 07:34:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-18 07:34:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:38,708 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:38,708 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:40,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:40,516 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 40 times [2020-04-18 07:34:40,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:40,518 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [480841146] [2020-04-18 07:34:40,519 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:40,520 INFO L259 McrAutomatonBuilder]: Finished intersection with 163 states and 378 transitions. [2020-04-18 07:34:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states. [2020-04-18 07:34:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:40,521 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1412066749, now seen corresponding path program 41 times [2020-04-18 07:34:40,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:40,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068153058] [2020-04-18 07:34:40,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-04-18 07:34:40,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068153058] [2020-04-18 07:34:40,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:34:40,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:34:40,562 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:40,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:40,567 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 66 transitions. [2020-04-18 07:34:40,567 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:40,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:40,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:40,592 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:34:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:34:40,593 INFO L87 Difference]: Start difference. First operand 163 states. Second operand 7 states. [2020-04-18 07:34:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:40,715 INFO L93 Difference]: Finished difference Result 273 states and 641 transitions. [2020-04-18 07:34:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 641 transitions. [2020-04-18 07:34:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:40,716 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1985398233, now seen corresponding path program 42 times [2020-04-18 07:34:40,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:40,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490825800] [2020-04-18 07:34:40,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:34:40,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490825800] [2020-04-18 07:34:40,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288088070] [2020-04-18 07:34:40,785 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 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 07:34:40,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:40,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:40,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:40,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:34:40,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:40,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:40,860 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:40,862 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:40,866 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 52 transitions. [2020-04-18 07:34:40,867 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:40,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:40,899 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:34:40,899 INFO L87 Difference]: Start difference. First operand 273 states and 641 transitions. Second operand 9 states. [2020-04-18 07:34:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:41,060 INFO L93 Difference]: Finished difference Result 354 states and 828 transitions. [2020-04-18 07:34:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 828 transitions. [2020-04-18 07:34:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:41,061 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:41,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1917013943, now seen corresponding path program 43 times [2020-04-18 07:34:41,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:41,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128997485] [2020-04-18 07:34:41,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:34:41,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128997485] [2020-04-18 07:34:41,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464360731] [2020-04-18 07:34:41,121 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 07:34:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:41,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:34:41,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:34:41,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:41,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:34:41,179 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:41,180 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:41,183 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 56 transitions. [2020-04-18 07:34:41,183 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:41,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,230 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:34:41,231 INFO L87 Difference]: Start difference. First operand 354 states and 828 transitions. Second operand 9 states. [2020-04-18 07:34:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:41,427 INFO L93 Difference]: Finished difference Result 422 states and 983 transitions. [2020-04-18 07:34:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 983 transitions. [2020-04-18 07:34:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:41,429 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -39664095, now seen corresponding path program 44 times [2020-04-18 07:34:41,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:41,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836766122] [2020-04-18 07:34:41,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:41,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836766122] [2020-04-18 07:34:41,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044081751] [2020-04-18 07:34:41,500 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 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 07:34:41,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:41,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:41,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:41,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:41,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:41,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:41,554 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:41,555 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:41,559 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 46 transitions. [2020-04-18 07:34:41,559 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:41,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,594 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:41,595 INFO L87 Difference]: Start difference. First operand 422 states and 983 transitions. Second operand 11 states. [2020-04-18 07:34:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:41,823 INFO L93 Difference]: Finished difference Result 455 states and 1050 transitions. [2020-04-18 07:34:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1050 transitions. [2020-04-18 07:34:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:41,824 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:41,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2135390211, now seen corresponding path program 45 times [2020-04-18 07:34:41,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:41,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608176700] [2020-04-18 07:34:41,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:41,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608176700] [2020-04-18 07:34:41,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993739670] [2020-04-18 07:34:41,905 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:41,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:41,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:41,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 07:34:41,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:41,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:41,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:41,964 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:41,965 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:41,969 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 44 transitions. [2020-04-18 07:34:41,969 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:41,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,971 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:41,972 INFO L87 Difference]: Start difference. First operand 455 states and 1050 transitions. Second operand 11 states. [2020-04-18 07:34:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:42,221 INFO L93 Difference]: Finished difference Result 504 states and 1157 transitions. [2020-04-18 07:34:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1157 transitions. [2020-04-18 07:34:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:42,223 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash 886258277, now seen corresponding path program 46 times [2020-04-18 07:34:42,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:42,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553923582] [2020-04-18 07:34:42,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:42,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553923582] [2020-04-18 07:34:42,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616220882] [2020-04-18 07:34:42,313 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:42,365 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:42,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:42,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:42,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:34:42,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:42,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:34:42,390 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:42,391 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:42,395 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 48 transitions. [2020-04-18 07:34:42,395 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:42,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:42,434 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:34:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:34:42,436 INFO L87 Difference]: Start difference. First operand 504 states and 1157 transitions. Second operand 11 states. [2020-04-18 07:34:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:42,773 INFO L93 Difference]: Finished difference Result 540 states and 1232 transitions. [2020-04-18 07:34:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1232 transitions. [2020-04-18 07:34:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:42,774 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:34:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1608806907, now seen corresponding path program 47 times [2020-04-18 07:34:42,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:42,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566012268] [2020-04-18 07:34:42,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:42,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566012268] [2020-04-18 07:34:42,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445748617] [2020-04-18 07:34:42,883 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:42,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 07:34:42,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:42,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:42,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:42,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:42,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:42,965 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:42,966 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:42,971 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 07:34:42,971 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:43,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:43,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:43,026 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:34:43,028 INFO L87 Difference]: Start difference. First operand 540 states and 1232 transitions. Second operand 13 states. [2020-04-18 07:34:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:43,402 INFO L93 Difference]: Finished difference Result 556 states and 1260 transitions. [2020-04-18 07:34:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1260 transitions. [2020-04-18 07:34:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:43,404 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:34:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash 316013657, now seen corresponding path program 48 times [2020-04-18 07:34:43,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:43,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315135882] [2020-04-18 07:34:43,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:43,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315135882] [2020-04-18 07:34:43,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904844964] [2020-04-18 07:34:43,509 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:43,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:34:43,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:43,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:43,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:43,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:43,578 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:43,579 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:43,584 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 07:34:43,584 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:43,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:43,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:43,586 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:43,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:34:43,587 INFO L87 Difference]: Start difference. First operand 556 states and 1260 transitions. Second operand 13 states. [2020-04-18 07:34:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:43,916 INFO L93 Difference]: Finished difference Result 572 states and 1288 transitions. [2020-04-18 07:34:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1288 transitions. [2020-04-18 07:34:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:43,917 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:34:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 247629367, now seen corresponding path program 49 times [2020-04-18 07:34:43,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210650771] [2020-04-18 07:34:43,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:44,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210650771] [2020-04-18 07:34:44,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947687244] [2020-04-18 07:34:44,002 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:44,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:44,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:44,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:44,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:44,069 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:44,070 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:44,074 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 07:34:44,074 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:44,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:44,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:44,076 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:34:44,077 INFO L87 Difference]: Start difference. First operand 572 states and 1288 transitions. Second operand 13 states. [2020-04-18 07:34:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:44,489 INFO L93 Difference]: Finished difference Result 597 states and 1337 transitions. [2020-04-18 07:34:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1337 transitions. [2020-04-18 07:34:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:44,490 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:34:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:44,491 INFO L82 PathProgramCache]: Analyzing trace with hash 761524117, now seen corresponding path program 50 times [2020-04-18 07:34:44,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:44,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141644575] [2020-04-18 07:34:44,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:44,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141644575] [2020-04-18 07:34:44,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95287649] [2020-04-18 07:34:44,559 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:44,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:44,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:44,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:34:44,605 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:34:44,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:44,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:34:44,616 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:44,617 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:44,620 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 07:34:44,620 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:44,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:44,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:44,666 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:34:44,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 07:34:44,667 INFO L87 Difference]: Start difference. First operand 597 states and 1337 transitions. Second operand 13 states. [2020-04-18 07:34:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:45,121 INFO L93 Difference]: Finished difference Result 611 states and 1360 transitions. [2020-04-18 07:34:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1360 transitions. [2020-04-18 07:34:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:45,123 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:34:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 51 times [2020-04-18 07:34:45,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:45,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953979146] [2020-04-18 07:34:45,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:45,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953979146] [2020-04-18 07:34:45,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925563376] [2020-04-18 07:34:45,270 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:45,335 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 07:34:45,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:45,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:45,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:45,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:45,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 07:34:45,356 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:45,357 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:45,360 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-04-18 07:34:45,361 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:45,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:45,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:45,399 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:34:45,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 07:34:45,400 INFO L87 Difference]: Start difference. First operand 611 states and 1360 transitions. Second operand 15 states. [2020-04-18 07:34:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:45,768 INFO L93 Difference]: Finished difference Result 616 states and 1365 transitions. [2020-04-18 07:34:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1365 transitions. [2020-04-18 07:34:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:45,770 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:34:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 52 times [2020-04-18 07:34:45,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:45,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372651784] [2020-04-18 07:34:45,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:45,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372651784] [2020-04-18 07:34:45,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15901031] [2020-04-18 07:34:45,888 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:45,938 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:45,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:45,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:45,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:45,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:45,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 07:34:45,952 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:45,953 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:45,956 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 07:34:45,957 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:45,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:45,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:45,961 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:34:45,962 INFO L87 Difference]: Start difference. First operand 616 states and 1365 transitions. Second operand 15 states. [2020-04-18 07:34:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:46,404 INFO L93 Difference]: Finished difference Result 621 states and 1370 transitions. [2020-04-18 07:34:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1370 transitions. [2020-04-18 07:34:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:46,406 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:34:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 53 times [2020-04-18 07:34:46,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261213012] [2020-04-18 07:34:46,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:46,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261213012] [2020-04-18 07:34:46,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782200181] [2020-04-18 07:34:46,503 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:46,553 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-18 07:34:46,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:46,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:46,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:46,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:46,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 07:34:46,564 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:46,565 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:46,567 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 07:34:46,567 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:46,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:46,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:46,570 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:34:46,571 INFO L87 Difference]: Start difference. First operand 621 states and 1370 transitions. Second operand 15 states. [2020-04-18 07:34:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:47,052 INFO L93 Difference]: Finished difference Result 626 states and 1375 transitions. [2020-04-18 07:34:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1375 transitions. [2020-04-18 07:34:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:47,054 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:34:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:47,055 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 54 times [2020-04-18 07:34:47,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:47,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145395267] [2020-04-18 07:34:47,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145395267] [2020-04-18 07:34:47,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631262920] [2020-04-18 07:34:47,166 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:47,227 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-18 07:34:47,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:47,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:47,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:47,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 07:34:47,238 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:47,239 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:47,242 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 07:34:47,242 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:47,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:47,255 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:47,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:34:47,256 INFO L87 Difference]: Start difference. First operand 626 states and 1375 transitions. Second operand 15 states. [2020-04-18 07:34:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:47,836 INFO L93 Difference]: Finished difference Result 635 states and 1388 transitions. [2020-04-18 07:34:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1388 transitions. [2020-04-18 07:34:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:47,838 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:34:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:47,838 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 55 times [2020-04-18 07:34:47,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:47,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598014325] [2020-04-18 07:34:47,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598014325] [2020-04-18 07:34:47,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128258267] [2020-04-18 07:34:47,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:47,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:47,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:47,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-18 07:34:47,984 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:47,985 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:47,988 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-04-18 07:34:47,989 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:48,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:48,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:48,066 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:48,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1759, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:34:48,067 INFO L87 Difference]: Start difference. First operand 635 states and 1388 transitions. Second operand 15 states. [2020-04-18 07:34:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:48,642 INFO L93 Difference]: Finished difference Result 639 states and 1391 transitions. [2020-04-18 07:34:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1391 transitions. [2020-04-18 07:34:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:34:48,644 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:34:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 56 times [2020-04-18 07:34:48,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:48,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197291805] [2020-04-18 07:34:48,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:48,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197291805] [2020-04-18 07:34:48,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179240052] [2020-04-18 07:34:48,733 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:48,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:48,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:48,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:34:48,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:48,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:48,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:48,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-18 07:34:48,817 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:48,818 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:48,820 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-04-18 07:34:48,820 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:48,875 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:34:48,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:48,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 07:34:48,877 INFO L87 Difference]: Start difference. First operand 639 states and 1391 transitions. Second operand 15 states. [2020-04-18 07:34:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:49,745 INFO L93 Difference]: Finished difference Result 920 states and 2009 transitions. [2020-04-18 07:34:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2009 transitions. [2020-04-18 07:34:49,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:49,748 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [480841146] [2020-04-18 07:34:49,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:49,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-04-18 07:34:49,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [480841146] [2020-04-18 07:34:49,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-04-18 07:34:49,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 07:34:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=4130, Unknown=0, NotChecked=0, Total=5700 [2020-04-18 07:34:49,750 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 32 states. [2020-04-18 07:34:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:50,239 INFO L93 Difference]: Finished difference Result 102 states and 249 transitions. [2020-04-18 07:34:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 07:34:50,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 18 [2020-04-18 07:34:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:50,240 INFO L225 Difference]: With dead ends: 102 [2020-04-18 07:34:50,241 INFO L226 Difference]: Without dead ends: 79 [2020-04-18 07:34:50,241 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 599 SyntacticMatches, 132 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5032 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1570, Invalid=4130, Unknown=0, NotChecked=0, Total=5700 [2020-04-18 07:34:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-18 07:34:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2020-04-18 07:34:50,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-18 07:34:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-04-18 07:34:50,246 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 18 [2020-04-18 07:34:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:50,246 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-04-18 07:34:50,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-04-18 07:34:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-04-18 07:34:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 07:34:50,247 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:50,247 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:53,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:53,262 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 57 times [2020-04-18 07:34:53,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:53,263 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1001461509] [2020-04-18 07:34:53,263 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:53,265 INFO L259 McrAutomatonBuilder]: Finished intersection with 186 states and 435 transitions. [2020-04-18 07:34:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-04-18 07:34:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 07:34:53,266 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 44477432, now seen corresponding path program 58 times [2020-04-18 07:34:53,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:53,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8085618] [2020-04-18 07:34:53,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 07:34:53,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8085618] [2020-04-18 07:34:53,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190630535] [2020-04-18 07:34:53,327 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:53,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:53,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:53,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:34:53,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 07:34:53,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:53,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-04-18 07:34:53,401 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:53,403 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:53,408 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 73 transitions. [2020-04-18 07:34:53,408 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:53,470 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:34:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:34:53,470 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 9 states. [2020-04-18 07:34:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:53,501 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-04-18 07:34:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 435 transitions. [2020-04-18 07:34:53,502 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:53,502 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1001461509] [2020-04-18 07:34:53,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:53,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:34:53,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1001461509] [2020-04-18 07:34:53,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 07:34:53,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:34:53,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:34:53,504 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 9 states. [2020-04-18 07:34:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:53,521 INFO L93 Difference]: Finished difference Result 119 states and 258 transitions. [2020-04-18 07:34:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 07:34:53,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-04-18 07:34:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:53,522 INFO L225 Difference]: With dead ends: 119 [2020-04-18 07:34:53,522 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 07:34:53,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:34:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 07:34:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 07:34:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 07:34:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 07:34:53,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-04-18 07:34:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:53,523 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 07:34:53,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 07:34:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 07:34:53,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:53,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:53,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 07:34:53 BasicIcfg [2020-04-18 07:34:53,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 07:34:53,729 INFO L168 Benchmark]: Toolchain (without parser) took 37491.11 ms. Allocated memory was 144.2 MB in the beginning and 451.4 MB in the end (delta: 307.2 MB). Free memory was 101.5 MB in the beginning and 363.7 MB in the end (delta: -262.3 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,730 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 144.2 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.10 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 99.6 MB in the beginning and 161.4 MB in the end (delta: -61.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.97 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,731 INFO L168 Benchmark]: Boogie Preprocessor took 29.15 ms. Allocated memory is still 201.9 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,731 INFO L168 Benchmark]: RCFGBuilder took 425.81 ms. Allocated memory is still 201.9 MB. Free memory was 157.3 MB in the beginning and 137.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,732 INFO L168 Benchmark]: TraceAbstraction took 36256.32 ms. Allocated memory was 201.9 MB in the beginning and 451.4 MB in the end (delta: 249.6 MB). Free memory was 136.9 MB in the beginning and 363.7 MB in the end (delta: -226.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-04-18 07:34:53,734 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 144.2 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.10 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 99.6 MB in the beginning and 161.4 MB in the end (delta: -61.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.97 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.15 ms. Allocated memory is still 201.9 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.81 ms. Allocated memory is still 201.9 MB. Free memory was 157.3 MB in the beginning and 137.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36256.32 ms. Allocated memory was 201.9 MB in the beginning and 451.4 MB in the end (delta: 249.6 MB). Free memory was 136.9 MB in the beginning and 363.7 MB in the end (delta: -226.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.1s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 166 SDtfs, 605 SDslu, 643 SDs, 0 SdLazy, 638 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2153 GetRequests, 1585 SyntacticMatches, 302 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10150 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 120 StatesRemovedByMinimization, 8 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 proved your program to be correct! Received shutdown request...