/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-VariableLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:21:24,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:21:24,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:21:24,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:21:24,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:21:24,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:21:24,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:21:24,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:21:24,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:21:24,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:21:24,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:21:24,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:21:24,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:21:24,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:21:24,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:21:24,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:21:24,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:21:24,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:21:24,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:21:24,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:21:24,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:21:24,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:21:24,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:21:24,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:21:24,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 19:21:24,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:21:24,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:21:24,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:21:24,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:21:24,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:21:24,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:21:24,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:21:24,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:21:24,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:21:24,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:21:24,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:21:24,997 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-VariableLbe-MCR.epf [2019-12-27 19:21:25,023 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:21:25,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:21:25,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:21:25,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:21:25,028 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:21:25,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:21:25,029 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:21:25,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:21:25,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:21:25,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:21:25,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:21:25,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:21:25,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:21:25,032 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:21:25,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:21:25,033 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:21:25,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:21:25,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:21:25,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:21:25,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:21:25,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:21:25,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:21:25,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:21:25,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:21:25,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:21:25,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:21:25,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:21:25,036 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:21:25,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 19:21:25,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:21:25,036 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:21:25,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:21:25,306 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:21:25,322 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:21:25,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:21:25,327 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:21:25,329 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:21:25,329 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-27 19:21:25,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db990088d/c8d9207fab3b4034a28bf2bd3f8d4408/FLAGe89cb64e8 [2019-12-27 19:21:25,927 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:21:25,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2019-12-27 19:21:25,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db990088d/c8d9207fab3b4034a28bf2bd3f8d4408/FLAGe89cb64e8 [2019-12-27 19:21:26,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db990088d/c8d9207fab3b4034a28bf2bd3f8d4408 [2019-12-27 19:21:26,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:21:26,273 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:21:26,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:21:26,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:21:26,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:21:26,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:26,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cdd1cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26, skipping insertion in model container [2019-12-27 19:21:26,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:26,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:21:26,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:21:26,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:21:26,840 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:21:26,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:21:26,991 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:21:26,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26 WrapperNode [2019-12-27 19:21:26,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:21:26,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:21:26,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:21:26,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:21:27,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:21:27,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:21:27,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:21:27,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:21:27,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (1/1) ... [2019-12-27 19:21:27,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:21:27,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:21:27,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:21:27,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:21:27,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (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 [2019-12-27 19:21:27,156 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 19:21:27,156 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 19:21:27,156 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 19:21:27,156 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 19:21:27,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:21:27,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:21:27,159 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 19:21:27,489 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:21:27,489 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 19:21:27,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:21:27 BoogieIcfgContainer [2019-12-27 19:21:27,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:21:27,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:21:27,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:21:27,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:21:27,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:21:26" (1/3) ... [2019-12-27 19:21:27,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64416c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:21:27, skipping insertion in model container [2019-12-27 19:21:27,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:26" (2/3) ... [2019-12-27 19:21:27,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64416c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:21:27, skipping insertion in model container [2019-12-27 19:21:27,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:21:27" (3/3) ... [2019-12-27 19:21:27,501 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-12-27 19:21:27,511 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:21:27,511 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:21:27,517 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:21:27,517 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:21:27,546 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,547 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,547 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,548 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,548 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,548 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,549 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,549 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,549 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,550 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,550 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,550 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,550 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,551 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,551 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,552 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,552 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,552 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,552 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,553 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,553 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,553 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,554 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,554 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,554 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,555 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,555 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,555 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,560 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,560 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,561 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,561 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,569 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,569 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,569 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,570 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,570 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,570 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:27,598 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 19:21:27,615 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:21:27,615 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:21:27,615 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:21:27,616 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:21:27,616 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:21:27,616 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:21:27,616 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:21:27,616 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:21:27,628 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-27 19:21:27,631 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 19:21:27,673 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 19:21:27,674 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:21:27,682 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 19:21:27,690 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 19:21:27,708 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 19:21:27,709 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:21:27,711 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 19:21:27,713 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-27 19:21:27,714 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 19:21:28,834 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-27 19:21:28,945 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-27 19:21:28,946 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-27 19:21:28,949 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 19:21:28,960 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 19:21:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 19:21:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 19:21:28,967 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:28,968 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 19:21:28,968 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-27 19:21:28,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:28,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971762991] [2019-12-27 19:21:28,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971762991] [2019-12-27 19:21:29,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:29,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 19:21:29,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566799548] [2019-12-27 19:21:29,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:29,217 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:29,233 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 19:21:29,234 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:29,238 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:29,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:21:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:21:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:21:29,258 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 19:21:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:29,294 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-27 19:21:29,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:21:29,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 19:21:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:29,327 INFO L225 Difference]: With dead ends: 48 [2019-12-27 19:21:29,327 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:29,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:21:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 19:21:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-27 19:21:29,365 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-27 19:21:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:29,365 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-27 19:21:29,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:21:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-27 19:21:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:21:29,367 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:29,367 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:29,367 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-27 19:21:29,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:29,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961440267] [2019-12-27 19:21:29,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961440267] [2019-12-27 19:21:29,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:29,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:21:29,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203470817] [2019-12-27 19:21:29,495 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:29,498 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:29,502 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 19:21:29,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:29,509 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:29,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:21:29,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:21:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:21:29,511 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-27 19:21:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:29,530 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:29,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:21:29,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:21:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:29,532 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:29,532 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 19:21:29,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:21:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 19:21:29,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 19:21:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:29,539 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-27 19:21:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:29,540 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:29,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:21:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:21:29,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:29,541 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:29,541 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:29,542 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-27 19:21:29,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:29,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174877962] [2019-12-27 19:21:29,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174877962] [2019-12-27 19:21:29,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:29,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:21:29,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2017705744] [2019-12-27 19:21:29,612 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:29,613 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:29,616 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 19:21:29,617 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:29,618 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:29,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:21:29,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:21:29,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:21:29,620 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-27 19:21:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:29,654 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:29,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:21:29,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:21:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:29,656 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:29,656 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:29,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 19:21:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-27 19:21:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 19:21:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 19:21:29,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-27 19:21:29,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:29,662 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 19:21:29,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:21:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 19:21:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:21:29,663 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:29,663 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:29,663 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-27 19:21:29,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:29,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082678437] [2019-12-27 19:21:29,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082678437] [2019-12-27 19:21:29,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:29,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:21:29,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930012384] [2019-12-27 19:21:29,731 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:29,733 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:29,736 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 19:21:29,736 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:29,737 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:29,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:21:29,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:29,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:21:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:21:29,739 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-27 19:21:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:29,782 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 19:21:29,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:21:29,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:21:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:29,784 INFO L225 Difference]: With dead ends: 32 [2019-12-27 19:21:29,784 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:29,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 19:21:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 19:21:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 19:21:29,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-27 19:21:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:29,793 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 19:21:29,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:21:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 19:21:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:21:29,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:29,795 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:29,795 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-27 19:21:29,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:29,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931051584] [2019-12-27 19:21:29,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931051584] [2019-12-27 19:21:29,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059578143] [2019-12-27 19:21:29,886 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 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 [2019-12-27 19:21:29,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:21:29,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:29,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:21:29,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:29,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:29,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 19:21:29,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [734895941] [2019-12-27 19:21:29,976 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:29,977 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:29,979 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:21:29,979 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:29,980 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:29,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:21:29,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:21:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:21:29,982 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 6 states. [2019-12-27 19:21:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:30,041 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 19:21:30,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:21:30,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:21:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:30,044 INFO L225 Difference]: With dead ends: 32 [2019-12-27 19:21:30,044 INFO L226 Difference]: Without dead ends: 29 [2019-12-27 19:21:30,044 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:21:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-27 19:21:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-27 19:21:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 19:21:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 19:21:30,049 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-27 19:21:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:30,050 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 19:21:30,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:21:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 19:21:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:21:30,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:30,051 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:30,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:30,259 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-27 19:21:30,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:30,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601813209] [2019-12-27 19:21:30,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:30,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601813209] [2019-12-27 19:21:30,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438165434] [2019-12-27 19:21:30,319 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:30,370 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:30,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:30,371 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:21:30,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:30,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:30,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 19:21:30,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441795844] [2019-12-27 19:21:30,387 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:30,388 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:30,390 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:21:30,390 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:30,391 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:30,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:21:30,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:21:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:21:30,392 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 6 states. [2019-12-27 19:21:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:30,454 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-27 19:21:30,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:21:30,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:21:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:30,455 INFO L225 Difference]: With dead ends: 33 [2019-12-27 19:21:30,455 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 19:21:30,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 19:21:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 19:21:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:30,461 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-27 19:21:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:30,461 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:30,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:21:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:21:30,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:30,462 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:30,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:30,665 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-27 19:21:30,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:30,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332885206] [2019-12-27 19:21:30,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:30,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332885206] [2019-12-27 19:21:30,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792189491] [2019-12-27 19:21:30,729 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 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 [2019-12-27 19:21:30,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:30,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:30,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:21:30,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:30,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:30,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 19:21:30,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [621599340] [2019-12-27 19:21:30,802 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:30,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:30,805 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:21:30,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:30,807 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:30,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:21:30,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:21:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:21:30,808 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 7 states. [2019-12-27 19:21:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:30,886 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:30,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:21:30,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:21:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:30,887 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:30,887 INFO L226 Difference]: Without dead ends: 31 [2019-12-27 19:21:30,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-27 19:21:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-27 19:21:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-27 19:21:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-27 19:21:30,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-27 19:21:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:30,891 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-27 19:21:30,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:21:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-27 19:21:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:21:30,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:30,892 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:31,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:31,096 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-27 19:21:31,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:31,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745379872] [2019-12-27 19:21:31,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:31,190 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745379872] [2019-12-27 19:21:31,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064288957] [2019-12-27 19:21:31,191 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 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 [2019-12-27 19:21:31,251 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:21:31,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:31,253 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:21:31,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:31,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:31,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 19:21:31,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1971762546] [2019-12-27 19:21:31,285 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:31,286 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:31,288 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:21:31,289 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:31,290 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:31,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:21:31,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:21:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:21:31,292 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 7 states. [2019-12-27 19:21:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:31,393 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-27 19:21:31,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:21:31,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:21:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:31,394 INFO L225 Difference]: With dead ends: 35 [2019-12-27 19:21:31,394 INFO L226 Difference]: Without dead ends: 32 [2019-12-27 19:21:31,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:21:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-27 19:21:31,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-27 19:21:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 19:21:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 19:21:31,398 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-27 19:21:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:31,398 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 19:21:31,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:21:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 19:21:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:21:31,399 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:31,399 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:31,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:31,604 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-27 19:21:31,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:31,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602198102] [2019-12-27 19:21:31,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:31,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602198102] [2019-12-27 19:21:31,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160299053] [2019-12-27 19:21:31,669 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 [2019-12-27 19:21:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:31,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:21:31,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:31,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:31,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:21:31,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [199817847] [2019-12-27 19:21:31,742 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:31,743 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:31,746 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:21:31,746 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:31,747 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:31,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:21:31,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:21:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:21:31,748 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 8 states. [2019-12-27 19:21:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:31,842 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-27 19:21:31,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:21:31,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:21:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:31,843 INFO L225 Difference]: With dead ends: 36 [2019-12-27 19:21:31,843 INFO L226 Difference]: Without dead ends: 33 [2019-12-27 19:21:31,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-27 19:21:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-27 19:21:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-27 19:21:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-27 19:21:31,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-27 19:21:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:31,853 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-27 19:21:31,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:21:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-27 19:21:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:21:31,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:31,854 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:32,055 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,055 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-27 19:21:32,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90645958] [2019-12-27 19:21:32,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:32,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90645958] [2019-12-27 19:21:32,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19810481] [2019-12-27 19:21:32,122 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 [2019-12-27 19:21:32,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:32,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:32,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:21:32,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:32,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:32,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:21:32,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [596039675] [2019-12-27 19:21:32,188 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,189 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,192 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:21:32,192 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,193 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:32,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:21:32,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:21:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:21:32,194 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 8 states. [2019-12-27 19:21:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,309 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-27 19:21:32,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:21:32,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:21:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,310 INFO L225 Difference]: With dead ends: 37 [2019-12-27 19:21:32,310 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 19:21:32,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 19:21:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-27 19:21:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 19:21:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 19:21:32,315 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-27 19:21:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,315 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 19:21:32,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:21:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 19:21:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:21:32,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,327 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:32,532 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-27 19:21:32,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897451691] [2019-12-27 19:21:32,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:32,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897451691] [2019-12-27 19:21:32,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171457074] [2019-12-27 19:21:32,621 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 [2019-12-27 19:21:32,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:21:32,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:32,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:21:32,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:32,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:32,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 19:21:32,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2135452232] [2019-12-27 19:21:32,698 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,699 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,702 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:21:32,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:32,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:21:32,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:21:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:32,704 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 9 states. [2019-12-27 19:21:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,815 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-27 19:21:32,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:21:32,816 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:21:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,817 INFO L225 Difference]: With dead ends: 38 [2019-12-27 19:21:32,817 INFO L226 Difference]: Without dead ends: 35 [2019-12-27 19:21:32,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:21:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-27 19:21:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-27 19:21:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-27 19:21:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-27 19:21:32,824 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-27 19:21:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,824 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-27 19:21:32,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:21:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-27 19:21:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:21:32,826 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,826 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:33,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:33,027 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-27 19:21:33,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:33,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260544055] [2019-12-27 19:21:33,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:33,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260544055] [2019-12-27 19:21:33,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627621621] [2019-12-27 19:21:33,106 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 [2019-12-27 19:21:33,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:33,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:33,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:21:33,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:33,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:33,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 19:21:33,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809437709] [2019-12-27 19:21:33,173 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:33,175 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:33,177 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:21:33,177 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:33,178 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:33,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:21:33,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:21:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:33,179 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 9 states. [2019-12-27 19:21:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:33,287 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-27 19:21:33,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:21:33,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:21:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:33,288 INFO L225 Difference]: With dead ends: 39 [2019-12-27 19:21:33,289 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 19:21:33,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:21:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 19:21:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 19:21:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:21:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 19:21:33,293 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-27 19:21:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:33,293 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 19:21:33,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:21:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 19:21:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:33,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:33,294 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:33,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:33,498 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-27 19:21:33,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:33,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084305069] [2019-12-27 19:21:33,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:33,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084305069] [2019-12-27 19:21:33,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749524090] [2019-12-27 19:21:33,589 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 [2019-12-27 19:21:33,651 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:21:33,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:33,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:21:33,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:33,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:33,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 19:21:33,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1676335317] [2019-12-27 19:21:33,675 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:33,676 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:33,678 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:33,678 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:33,682 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:33,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:33,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:33,684 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 10 states. [2019-12-27 19:21:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:33,827 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-27 19:21:33,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:21:33,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:33,828 INFO L225 Difference]: With dead ends: 40 [2019-12-27 19:21:33,828 INFO L226 Difference]: Without dead ends: 37 [2019-12-27 19:21:33,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:21:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-27 19:21:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-27 19:21:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-27 19:21:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-27 19:21:33,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-27 19:21:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:33,839 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-27 19:21:33,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-27 19:21:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:33,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:33,840 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:34,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:34,048 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-27 19:21:34,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:34,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797204998] [2019-12-27 19:21:34,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:34,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797204998] [2019-12-27 19:21:34,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333084272] [2019-12-27 19:21:34,128 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 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 [2019-12-27 19:21:34,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:21:34,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:34,197 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:34,199 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:34,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:34,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 19:21:34,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2116505044] [2019-12-27 19:21:34,222 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:34,223 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:34,228 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 19:21:34,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:34,229 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:34,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:34,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:34,230 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 10 states. [2019-12-27 19:21:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:34,370 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-27 19:21:34,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:34,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:34,373 INFO L225 Difference]: With dead ends: 41 [2019-12-27 19:21:34,373 INFO L226 Difference]: Without dead ends: 38 [2019-12-27 19:21:34,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-27 19:21:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-27 19:21:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 19:21:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 19:21:34,384 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-27 19:21:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:34,384 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 19:21:34,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 19:21:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:21:34,385 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:34,385 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:34,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:34,586 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-27 19:21:34,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:34,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713819293] [2019-12-27 19:21:34,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:34,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713819293] [2019-12-27 19:21:34,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425785681] [2019-12-27 19:21:34,670 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 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 [2019-12-27 19:21:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:34,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:34,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:34,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 19:21:34,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [390141218] [2019-12-27 19:21:34,767 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:34,769 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:34,773 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 19:21:34,773 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:34,775 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:34,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:21:34,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:21:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:21:34,776 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 11 states. [2019-12-27 19:21:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:34,943 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-27 19:21:34,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:34,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 19:21:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:34,944 INFO L225 Difference]: With dead ends: 42 [2019-12-27 19:21:34,944 INFO L226 Difference]: Without dead ends: 39 [2019-12-27 19:21:34,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-27 19:21:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-27 19:21:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-27 19:21:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-27 19:21:34,954 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-27 19:21:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:34,954 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-27 19:21:34,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:21:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-27 19:21:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:21:34,955 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:34,955 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:35,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:35,161 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-27 19:21:35,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:35,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893008769] [2019-12-27 19:21:35,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:35,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893008769] [2019-12-27 19:21:35,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614252332] [2019-12-27 19:21:35,248 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 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 [2019-12-27 19:21:35,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:35,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:35,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:35,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:35,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:35,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 19:21:35,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [974094310] [2019-12-27 19:21:35,348 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:35,349 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:35,353 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 19:21:35,353 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:35,355 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:35,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:21:35,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:21:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:21:35,356 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 11 states. [2019-12-27 19:21:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:35,513 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-27 19:21:35,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:21:35,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 19:21:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:35,515 INFO L225 Difference]: With dead ends: 43 [2019-12-27 19:21:35,515 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 19:21:35,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 19:21:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 19:21:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 19:21:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 19:21:35,523 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-27 19:21:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:35,525 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 19:21:35,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:21:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 19:21:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:21:35,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:35,527 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:35,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:35,731 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-27 19:21:35,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:35,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180920102] [2019-12-27 19:21:35,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:35,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180920102] [2019-12-27 19:21:35,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101440701] [2019-12-27 19:21:35,846 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 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 [2019-12-27 19:21:35,907 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:21:35,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:35,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:21:35,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:35,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:35,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:21:35,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1577075372] [2019-12-27 19:21:35,930 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:35,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:35,935 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:21:35,935 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:35,936 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:35,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:21:35,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:21:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:35,937 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 12 states. [2019-12-27 19:21:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:36,107 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-27 19:21:36,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:21:36,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 19:21:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:36,107 INFO L225 Difference]: With dead ends: 44 [2019-12-27 19:21:36,108 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 19:21:36,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:21:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 19:21:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-27 19:21:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 19:21:36,111 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-27 19:21:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:36,111 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 19:21:36,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:21:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 19:21:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:21:36,112 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:36,112 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:36,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:36,318 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-27 19:21:36,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:36,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791732321] [2019-12-27 19:21:36,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:36,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791732321] [2019-12-27 19:21:36,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337484467] [2019-12-27 19:21:36,415 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:36,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:36,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:36,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:21:36,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:36,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:36,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:21:36,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [412791167] [2019-12-27 19:21:36,486 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:36,487 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:36,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 19:21:36,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:36,491 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:36,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:21:36,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:21:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:36,492 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 12 states. [2019-12-27 19:21:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:36,646 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-27 19:21:36,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:21:36,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 19:21:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:36,647 INFO L225 Difference]: With dead ends: 45 [2019-12-27 19:21:36,647 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 19:21:36,647 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:21:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 19:21:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 19:21:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 19:21:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 19:21:36,650 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-27 19:21:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:36,650 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 19:21:36,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:21:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 19:21:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:21:36,653 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:36,653 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:36,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:36,858 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-27 19:21:36,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:36,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816658685] [2019-12-27 19:21:36,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:36,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816658685] [2019-12-27 19:21:36,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356533623] [2019-12-27 19:21:36,960 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 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 [2019-12-27 19:21:37,024 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:21:37,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:37,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 19:21:37,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:37,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:37,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:21:37,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [608063790] [2019-12-27 19:21:37,050 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:37,051 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:37,055 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:21:37,055 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:37,057 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:37,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:37,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:37,059 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 13 states. [2019-12-27 19:21:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:37,271 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-27 19:21:37,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:21:37,271 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 19:21:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:37,272 INFO L225 Difference]: With dead ends: 46 [2019-12-27 19:21:37,272 INFO L226 Difference]: Without dead ends: 43 [2019-12-27 19:21:37,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:21:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-27 19:21:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-27 19:21:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 19:21:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-27 19:21:37,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-27 19:21:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:37,275 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-27 19:21:37,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-27 19:21:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:21:37,276 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:37,276 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:37,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:37,479 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-27 19:21:37,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:37,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336191621] [2019-12-27 19:21:37,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:37,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336191621] [2019-12-27 19:21:37,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054185935] [2019-12-27 19:21:37,589 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 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 [2019-12-27 19:21:37,637 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:21:37,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:37,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 19:21:37,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:37,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:37,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:21:37,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [371972962] [2019-12-27 19:21:37,665 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:37,667 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:37,669 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 19:21:37,670 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:37,671 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:37,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:37,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:37,672 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 13 states. [2019-12-27 19:21:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:37,867 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-27 19:21:37,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:37,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 19:21:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:37,868 INFO L225 Difference]: With dead ends: 47 [2019-12-27 19:21:37,868 INFO L226 Difference]: Without dead ends: 44 [2019-12-27 19:21:37,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:21:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-27 19:21:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-27 19:21:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 19:21:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 19:21:37,871 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-27 19:21:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:37,871 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 19:21:37,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 19:21:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:21:37,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:37,872 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:38,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:38,078 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-27 19:21:38,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:38,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931734002] [2019-12-27 19:21:38,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:38,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931734002] [2019-12-27 19:21:38,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934869384] [2019-12-27 19:21:38,177 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 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 [2019-12-27 19:21:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:38,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:21:38,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:38,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:38,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:21:38,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150763854] [2019-12-27 19:21:38,251 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:38,253 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:38,255 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:21:38,256 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:38,257 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:38,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:21:38,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:38,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:21:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:21:38,258 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 14 states. [2019-12-27 19:21:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:38,472 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-27 19:21:38,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:38,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 19:21:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:38,473 INFO L225 Difference]: With dead ends: 48 [2019-12-27 19:21:38,473 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 19:21:38,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 19:21:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-27 19:21:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:38,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-27 19:21:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:38,476 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:38,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:21:38,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:21:38,477 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:38,477 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:38,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:38,680 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:38,681 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-27 19:21:38,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:38,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703826987] [2019-12-27 19:21:38,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:38,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703826987] [2019-12-27 19:21:38,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844958007] [2019-12-27 19:21:38,804 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 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 [2019-12-27 19:21:38,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:38,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:38,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:21:38,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:38,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:38,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:21:38,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1487769923] [2019-12-27 19:21:38,880 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:38,882 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:38,885 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:21:38,885 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:38,886 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:38,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:21:38,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:21:38,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:21:38,887 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 14 states. [2019-12-27 19:21:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:39,078 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-27 19:21:39,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 19:21:39,078 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 19:21:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:39,079 INFO L225 Difference]: With dead ends: 49 [2019-12-27 19:21:39,079 INFO L226 Difference]: Without dead ends: 46 [2019-12-27 19:21:39,080 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:21:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-27 19:21:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-27 19:21:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 19:21:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 19:21:39,083 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-27 19:21:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:39,084 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 19:21:39,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:21:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 19:21:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:21:39,084 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:39,084 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:39,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:39,288 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-27 19:21:39,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:39,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859529383] [2019-12-27 19:21:39,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:39,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859529383] [2019-12-27 19:21:39,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712225194] [2019-12-27 19:21:39,400 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 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 [2019-12-27 19:21:39,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 19:21:39,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:39,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:21:39,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:39,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:39,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 19:21:39,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1818112890] [2019-12-27 19:21:39,482 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:39,484 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:39,488 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:21:39,488 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:39,489 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:39,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:21:39,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:39,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:21:39,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:21:39,490 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 15 states. [2019-12-27 19:21:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:39,719 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-27 19:21:39,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 19:21:39,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 19:21:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:39,721 INFO L225 Difference]: With dead ends: 50 [2019-12-27 19:21:39,721 INFO L226 Difference]: Without dead ends: 47 [2019-12-27 19:21:39,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:21:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-27 19:21:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-27 19:21:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-27 19:21:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-27 19:21:39,726 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-27 19:21:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:39,726 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-27 19:21:39,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:21:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-27 19:21:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:21:39,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:39,727 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:39,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:39,928 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:39,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-27 19:21:39,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:39,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311379706] [2019-12-27 19:21:39,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:40,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311379706] [2019-12-27 19:21:40,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016155143] [2019-12-27 19:21:40,064 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:40,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:40,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:40,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:21:40,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:40,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:40,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:40,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 19:21:40,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [754003118] [2019-12-27 19:21:40,165 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:40,167 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:40,172 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:21:40,172 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:40,173 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:40,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:21:40,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:21:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:21:40,175 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 15 states. [2019-12-27 19:21:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:40,423 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-27 19:21:40,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:21:40,423 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 19:21:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:40,424 INFO L225 Difference]: With dead ends: 51 [2019-12-27 19:21:40,424 INFO L226 Difference]: Without dead ends: 48 [2019-12-27 19:21:40,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:21:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-27 19:21:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-27 19:21:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 19:21:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 19:21:40,428 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-27 19:21:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:40,428 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 19:21:40,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:21:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 19:21:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:21:40,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:40,429 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:40,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:40,632 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-27 19:21:40,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:40,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868289264] [2019-12-27 19:21:40,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:40,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868289264] [2019-12-27 19:21:40,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935118799] [2019-12-27 19:21:40,746 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 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 [2019-12-27 19:21:40,805 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-27 19:21:40,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:40,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 19:21:40,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:40,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:40,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 19:21:40,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2021323672] [2019-12-27 19:21:40,835 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:40,837 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:40,841 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 32 transitions. [2019-12-27 19:21:40,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:40,842 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:40,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:21:40,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:21:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:21:40,843 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 16 states. [2019-12-27 19:21:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:41,102 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-27 19:21:41,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:21:41,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 19:21:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:41,103 INFO L225 Difference]: With dead ends: 52 [2019-12-27 19:21:41,103 INFO L226 Difference]: Without dead ends: 49 [2019-12-27 19:21:41,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:21:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-27 19:21:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-27 19:21:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 19:21:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 19:21:41,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-27 19:21:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:41,106 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 19:21:41,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:21:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 19:21:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:21:41,106 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:41,106 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:41,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:41,310 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-27 19:21:41,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:41,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817319612] [2019-12-27 19:21:41,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:41,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817319612] [2019-12-27 19:21:41,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305569240] [2019-12-27 19:21:41,445 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 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 [2019-12-27 19:21:41,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 19:21:41,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:41,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:21:41,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:41,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:41,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 19:21:41,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [269261589] [2019-12-27 19:21:41,526 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:41,529 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:41,532 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 28 transitions. [2019-12-27 19:21:41,532 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:41,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:41,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:21:41,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:21:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:21:41,534 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 16 states. [2019-12-27 19:21:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:41,803 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-27 19:21:41,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 19:21:41,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 19:21:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:41,804 INFO L225 Difference]: With dead ends: 53 [2019-12-27 19:21:41,804 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 19:21:41,805 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:21:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 19:21:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 19:21:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 19:21:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 19:21:41,808 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-27 19:21:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:41,808 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 19:21:41,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:21:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 19:21:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 19:21:41,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:41,809 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:42,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:42,012 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-27 19:21:42,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:42,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321829232] [2019-12-27 19:21:42,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:42,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321829232] [2019-12-27 19:21:42,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692626037] [2019-12-27 19:21:42,137 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 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 [2019-12-27 19:21:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:42,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:21:42,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:42,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:42,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 19:21:42,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2076599798] [2019-12-27 19:21:42,220 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:42,222 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:42,226 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 33 transitions. [2019-12-27 19:21:42,226 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:42,227 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:42,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:21:42,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:21:42,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:42,228 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 17 states. [2019-12-27 19:21:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:42,527 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-27 19:21:42,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 19:21:42,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 19:21:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:42,533 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:21:42,534 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 19:21:42,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:21:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 19:21:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-27 19:21:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-27 19:21:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-27 19:21:42,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-27 19:21:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:42,536 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-27 19:21:42,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:21:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-27 19:21:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 19:21:42,537 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:42,537 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:42,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:42,740 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:42,740 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-27 19:21:42,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:42,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004718934] [2019-12-27 19:21:42,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:42,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004718934] [2019-12-27 19:21:42,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584189196] [2019-12-27 19:21:42,869 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 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 [2019-12-27 19:21:42,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:42,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:42,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:21:42,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:42,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:42,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 19:21:42,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [133870925] [2019-12-27 19:21:42,941 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:42,942 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:42,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 29 transitions. [2019-12-27 19:21:42,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:42,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:42,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:21:42,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:21:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:42,948 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 17 states. [2019-12-27 19:21:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:43,276 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-27 19:21:43,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:21:43,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 19:21:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:43,277 INFO L225 Difference]: With dead ends: 55 [2019-12-27 19:21:43,277 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 19:21:43,278 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:21:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 19:21:43,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 19:21:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:21:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 19:21:43,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-27 19:21:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:43,281 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 19:21:43,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:21:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 19:21:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 19:21:43,281 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:43,282 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:43,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:43,484 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-27 19:21:43,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:43,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537193593] [2019-12-27 19:21:43,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:43,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537193593] [2019-12-27 19:21:43,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257154781] [2019-12-27 19:21:43,616 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 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 [2019-12-27 19:21:43,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-27 19:21:43,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:43,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:21:43,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:43,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:43,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 19:21:43,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [186257505] [2019-12-27 19:21:43,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:43,698 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:43,702 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 34 transitions. [2019-12-27 19:21:43,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:43,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:43,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:21:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:21:43,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:43,705 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 18 states. [2019-12-27 19:21:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:44,008 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-27 19:21:44,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:21:44,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 19:21:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:44,009 INFO L225 Difference]: With dead ends: 56 [2019-12-27 19:21:44,009 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 19:21:44,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:21:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 19:21:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-27 19:21:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 19:21:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 19:21:44,012 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-27 19:21:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:44,013 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 19:21:44,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:21:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 19:21:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 19:21:44,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:44,013 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:44,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:44,216 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-27 19:21:44,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:44,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821458204] [2019-12-27 19:21:44,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:44,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821458204] [2019-12-27 19:21:44,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578338496] [2019-12-27 19:21:44,361 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:44,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:44,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:44,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:21:44,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:44,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:44,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 19:21:44,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627688134] [2019-12-27 19:21:44,477 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:44,480 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:44,487 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 30 transitions. [2019-12-27 19:21:44,487 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:44,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:44,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:21:44,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:21:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:44,489 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 18 states. [2019-12-27 19:21:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:44,855 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-27 19:21:44,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:21:44,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 19:21:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:44,856 INFO L225 Difference]: With dead ends: 57 [2019-12-27 19:21:44,856 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 19:21:44,857 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:21:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 19:21:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 19:21:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 19:21:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 19:21:44,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-27 19:21:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:44,862 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 19:21:44,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:21:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 19:21:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 19:21:44,886 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:44,886 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:45,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:45,091 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-27 19:21:45,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:45,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142168485] [2019-12-27 19:21:45,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:45,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142168485] [2019-12-27 19:21:45,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639299665] [2019-12-27 19:21:45,250 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 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 [2019-12-27 19:21:45,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 19:21:45,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:45,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 19:21:45,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:45,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:45,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 19:21:45,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1442345479] [2019-12-27 19:21:45,324 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:45,326 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:45,330 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 35 transitions. [2019-12-27 19:21:45,330 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:45,331 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:45,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:21:45,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:21:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:45,332 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 19 states. [2019-12-27 19:21:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:45,677 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-27 19:21:45,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:21:45,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 19:21:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:45,678 INFO L225 Difference]: With dead ends: 58 [2019-12-27 19:21:45,678 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 19:21:45,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=809, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:21:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 19:21:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-27 19:21:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-27 19:21:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-27 19:21:45,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-27 19:21:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:45,682 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-27 19:21:45,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:21:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-27 19:21:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 19:21:45,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:45,683 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:45,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:45,886 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-27 19:21:45,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:45,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656628371] [2019-12-27 19:21:45,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:46,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656628371] [2019-12-27 19:21:46,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687547777] [2019-12-27 19:21:46,050 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 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 [2019-12-27 19:21:46,124 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-27 19:21:46,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:46,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 19:21:46,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:46,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:46,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 19:21:46,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1308262046] [2019-12-27 19:21:46,154 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:46,156 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:46,161 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 31 transitions. [2019-12-27 19:21:46,162 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:46,163 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:46,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:21:46,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:21:46,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:46,164 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 19 states. [2019-12-27 19:21:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:46,516 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-27 19:21:46,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:21:46,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 19:21:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:46,518 INFO L225 Difference]: With dead ends: 59 [2019-12-27 19:21:46,518 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 19:21:46,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=847, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:21:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 19:21:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 19:21:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 19:21:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 19:21:46,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-27 19:21:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:46,521 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 19:21:46,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:21:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 19:21:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 19:21:46,522 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:46,522 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:46,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:46,726 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-27 19:21:46,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:46,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971630451] [2019-12-27 19:21:46,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:46,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971630451] [2019-12-27 19:21:46,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527348567] [2019-12-27 19:21:46,911 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 [2019-12-27 19:21:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:46,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:21:46,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:46,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:46,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 19:21:46,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1527240264] [2019-12-27 19:21:46,990 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:46,993 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:46,999 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 36 transitions. [2019-12-27 19:21:46,999 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:47,000 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:47,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:21:47,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:47,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:21:47,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:21:47,001 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 20 states. [2019-12-27 19:21:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:47,498 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-27 19:21:47,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:21:47,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 19:21:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:47,499 INFO L225 Difference]: With dead ends: 60 [2019-12-27 19:21:47,499 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 19:21:47,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=906, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:21:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 19:21:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-27 19:21:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:21:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 19:21:47,505 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-27 19:21:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:47,506 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 19:21:47,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:21:47,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 19:21:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 19:21:47,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:47,507 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:47,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:47,710 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-27 19:21:47,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:47,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503032779] [2019-12-27 19:21:47,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:47,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503032779] [2019-12-27 19:21:47,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851444563] [2019-12-27 19:21:47,876 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 [2019-12-27 19:21:47,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:47,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:47,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:21:47,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:47,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:47,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 19:21:47,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976069023] [2019-12-27 19:21:47,949 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:47,952 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:47,956 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 32 transitions. [2019-12-27 19:21:47,956 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:47,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:47,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:21:47,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:47,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:21:47,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:21:47,958 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 20 states. [2019-12-27 19:21:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:48,358 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-27 19:21:48,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:21:48,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 19:21:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:48,359 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:21:48,359 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 19:21:48,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=460, Invalid=946, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:21:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 19:21:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 19:21:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 19:21:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 19:21:48,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-27 19:21:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:48,362 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 19:21:48,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:21:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 19:21:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 19:21:48,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:48,363 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:48,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:48,566 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-27 19:21:48,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:48,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807643642] [2019-12-27 19:21:48,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:48,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807643642] [2019-12-27 19:21:48,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239331152] [2019-12-27 19:21:48,749 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 [2019-12-27 19:21:48,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-27 19:21:48,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:48,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:21:48,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:48,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:48,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 19:21:48,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [797557132] [2019-12-27 19:21:48,836 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:48,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:48,843 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 37 transitions. [2019-12-27 19:21:48,843 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:48,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:48,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:21:48,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:21:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:21:48,845 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 21 states. [2019-12-27 19:21:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:49,263 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-27 19:21:49,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:21:49,264 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 19:21:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:49,265 INFO L225 Difference]: With dead ends: 62 [2019-12-27 19:21:49,265 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 19:21:49,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:21:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 19:21:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-27 19:21:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-27 19:21:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-27 19:21:49,269 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-27 19:21:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:49,270 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-27 19:21:49,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:21:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-27 19:21:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 19:21:49,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:49,270 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:49,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:49,474 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:49,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-27 19:21:49,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:49,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733673444] [2019-12-27 19:21:49,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:49,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733673444] [2019-12-27 19:21:49,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413624643] [2019-12-27 19:21:49,690 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 [2019-12-27 19:21:49,768 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:49,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:49,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:21:49,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:49,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:49,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 19:21:49,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737590063] [2019-12-27 19:21:49,801 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:49,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:49,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 33 transitions. [2019-12-27 19:21:49,811 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:49,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:49,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:21:49,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:21:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:21:49,814 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 21 states. [2019-12-27 19:21:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:50,251 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-27 19:21:50,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:21:50,251 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 19:21:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:50,252 INFO L225 Difference]: With dead ends: 63 [2019-12-27 19:21:50,253 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:21:50,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:21:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:21:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 19:21:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:21:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-27 19:21:50,256 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-27 19:21:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:50,256 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-27 19:21:50,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:21:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-27 19:21:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 19:21:50,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:50,257 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:50,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:50,458 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-27 19:21:50,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:50,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54289181] [2019-12-27 19:21:50,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:50,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54289181] [2019-12-27 19:21:50,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602979632] [2019-12-27 19:21:50,671 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 [2019-12-27 19:21:50,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-27 19:21:50,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:50,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:21:50,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:50,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:50,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 19:21:50,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [450155989] [2019-12-27 19:21:50,762 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:50,765 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:50,772 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 38 transitions. [2019-12-27 19:21:50,772 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:50,774 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:50,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:21:50,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:21:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:21:50,775 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 22 states. [2019-12-27 19:21:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:51,202 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-27 19:21:51,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:21:51,203 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 19:21:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:51,204 INFO L225 Difference]: With dead ends: 64 [2019-12-27 19:21:51,204 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 19:21:51,205 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1117, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:21:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 19:21:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-27 19:21:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 19:21:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 19:21:51,207 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-27 19:21:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:51,208 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 19:21:51,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:21:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 19:21:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 19:21:51,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:51,209 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:51,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:51,412 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-27 19:21:51,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:51,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875152005] [2019-12-27 19:21:51,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:51,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875152005] [2019-12-27 19:21:51,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755230143] [2019-12-27 19:21:51,668 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 [2019-12-27 19:21:51,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-27 19:21:51,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:51,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:21:51,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:51,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:51,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 19:21:51,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [594522313] [2019-12-27 19:21:51,799 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:51,802 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:51,809 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 34 transitions. [2019-12-27 19:21:51,809 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:51,810 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:51,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:21:51,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:21:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:21:51,812 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 22 states. [2019-12-27 19:21:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:52,234 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 19:21:52,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:21:52,234 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 19:21:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:52,235 INFO L225 Difference]: With dead ends: 65 [2019-12-27 19:21:52,235 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 19:21:52,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:21:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 19:21:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 19:21:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 19:21:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-27 19:21:52,240 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-27 19:21:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:52,240 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-27 19:21:52,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:21:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-27 19:21:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 19:21:52,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:52,241 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:52,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:52,445 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-27 19:21:52,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:52,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471626610] [2019-12-27 19:21:52,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:52,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471626610] [2019-12-27 19:21:52,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598470537] [2019-12-27 19:21:52,648 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 [2019-12-27 19:21:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:52,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 19:21:52,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:52,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:52,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 19:21:52,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [75846044] [2019-12-27 19:21:52,729 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:52,732 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:52,738 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 39 transitions. [2019-12-27 19:21:52,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:52,742 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:52,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:21:52,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:21:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:21:52,743 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 23 states. [2019-12-27 19:21:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:53,222 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-27 19:21:53,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:21:53,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 19:21:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:53,224 INFO L225 Difference]: With dead ends: 66 [2019-12-27 19:21:53,224 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 19:21:53,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=1231, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:21:53,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 19:21:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-27 19:21:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 19:21:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-27 19:21:53,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-27 19:21:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:53,228 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-27 19:21:53,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:21:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-27 19:21:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 19:21:53,228 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:53,228 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:53,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:53,433 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-27 19:21:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:53,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322256255] [2019-12-27 19:21:53,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:53,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322256255] [2019-12-27 19:21:53,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820247748] [2019-12-27 19:21:53,639 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 [2019-12-27 19:21:53,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:53,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:53,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 19:21:53,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:53,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:53,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 19:21:53,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881774918] [2019-12-27 19:21:53,724 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:53,728 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:53,754 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 35 transitions. [2019-12-27 19:21:53,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:53,755 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:53,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:21:53,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:21:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:21:53,756 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 23 states. [2019-12-27 19:21:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:54,211 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-27 19:21:54,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:21:54,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 19:21:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:54,212 INFO L225 Difference]: With dead ends: 67 [2019-12-27 19:21:54,212 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 19:21:54,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=615, Invalid=1277, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:21:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 19:21:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 19:21:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 19:21:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-27 19:21:54,217 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-27 19:21:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:54,217 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-27 19:21:54,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:21:54,217 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-27 19:21:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 19:21:54,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:54,218 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:54,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:54,421 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-27 19:21:54,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:54,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154644307] [2019-12-27 19:21:54,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:54,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154644307] [2019-12-27 19:21:54,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636039319] [2019-12-27 19:21:54,571 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 [2019-12-27 19:21:54,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-27 19:21:54,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:54,636 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:54,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:54,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:21:54,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2019-12-27 19:21:54,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [157991458] [2019-12-27 19:21:54,646 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:54,650 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:54,657 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 40 transitions. [2019-12-27 19:21:54,657 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:54,659 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:21:54,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:54,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:54,660 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 13 states. [2019-12-27 19:21:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:54,687 INFO L93 Difference]: Finished difference Result 271 states and 497 transitions. [2019-12-27 19:21:54,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:54,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-27 19:21:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:54,687 INFO L225 Difference]: With dead ends: 271 [2019-12-27 19:21:54,687 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 19:21:54,688 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 19:21:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 19:21:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 19:21:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 64 transitions. [2019-12-27 19:21:54,689 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 64 transitions. Word has length 28 [2019-12-27 19:21:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:54,690 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 64 transitions. [2019-12-27 19:21:54,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 64 transitions. [2019-12-27 19:21:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 19:21:54,690 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:54,690 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:54,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:54,894 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-27 19:21:54,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:54,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941618997] [2019-12-27 19:21:54,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:55,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941618997] [2019-12-27 19:21:55,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114425937] [2019-12-27 19:21:55,132 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 [2019-12-27 19:21:55,182 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:55,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:55,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:55,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 19:21:55,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:21:55,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 35 [2019-12-27 19:21:55,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [507587796] [2019-12-27 19:21:55,382 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:55,385 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:55,390 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 36 transitions. [2019-12-27 19:21:55,390 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:55,391 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:55,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:55,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:21:55,393 INFO L87 Difference]: Start difference. First operand 40 states and 64 transitions. Second operand 13 states. [2019-12-27 19:21:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:55,425 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2019-12-27 19:21:55,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:55,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-12-27 19:21:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:55,431 INFO L225 Difference]: With dead ends: 131 [2019-12-27 19:21:55,431 INFO L226 Difference]: Without dead ends: 0 [2019-12-27 19:21:55,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:21:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-27 19:21:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-27 19:21:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-27 19:21:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-27 19:21:55,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-12-27 19:21:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:55,433 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-27 19:21:55,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-27 19:21:55,433 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-27 19:21:55,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:55,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 07:21:55 BasicIcfg [2019-12-27 19:21:55,642 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 19:21:55,644 INFO L168 Benchmark]: Toolchain (without parser) took 29371.93 ms. Allocated memory was 145.2 MB in the beginning and 402.1 MB in the end (delta: 256.9 MB). Free memory was 101.5 MB in the beginning and 97.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 260.9 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,644 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,645 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.09 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 159.6 MB in the end (delta: -58.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,645 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.08 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 157.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,645 INFO L168 Benchmark]: Boogie Preprocessor took 30.84 ms. Allocated memory is still 202.4 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,646 INFO L168 Benchmark]: RCFGBuilder took 396.66 ms. Allocated memory is still 202.4 MB. Free memory was 156.2 MB in the beginning and 136.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,646 INFO L168 Benchmark]: TraceAbstraction took 28150.23 ms. Allocated memory was 202.4 MB in the beginning and 402.1 MB in the end (delta: 199.8 MB). Free memory was 135.9 MB in the beginning and 97.5 MB in the end (delta: 38.3 MB). Peak memory consumption was 238.1 MB. Max. memory is 7.1 GB. [2019-12-27 19:21:55,648 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 718.09 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 101.3 MB in the beginning and 159.6 MB in the end (delta: -58.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.08 ms. Allocated memory is still 202.4 MB. Free memory was 159.6 MB in the beginning and 157.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.84 ms. Allocated memory is still 202.4 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.66 ms. Allocated memory is still 202.4 MB. Free memory was 156.2 MB in the beginning and 136.5 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28150.23 ms. Allocated memory was 202.4 MB in the beginning and 402.1 MB in the end (delta: 199.8 MB). Free memory was 135.9 MB in the beginning and 97.5 MB in the end (delta: 38.3 MB). Peak memory consumption was 238.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 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, 47 locations, 1 error locations. Result: SAFE, OverallTime: 28.0s, OverallIterations: 42, TraceHistogramMax: 11, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 461 SDtfs, 1252 SDslu, 1023 SDs, 0 SdLazy, 1422 SolverSat, 1444 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1641 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 938 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4833 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 42 MinimizatonAttempts, 285 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 1474 NumberOfCodeBlocks, 1473 NumberOfCodeBlocksAsserted, 189 NumberOfCheckSat, 1394 ConstructedInterpolants, 0 QuantifiedInterpolants, 86948 SizeOfPredicates, 378 NumberOfNonLiveVariables, 4709 ConjunctsInSsa, 586 ConjunctsInUnsatCore, 80 InterpolantComputations, 6 PerfectInterpolantSequences, 290/2860 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...