/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.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 19:38:58,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 19:38:58,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 19:38:58,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 19:38:58,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 19:38:58,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 19:38:58,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 19:38:58,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 19:38:58,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 19:38:58,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 19:38:58,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 19:38:58,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 19:38:58,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 19:38:58,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 19:38:58,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 19:38:58,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 19:38:58,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 19:38:58,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 19:38:58,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 19:38:58,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 19:38:58,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 19:38:58,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 19:38:58,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 19:38:58,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 19:38:58,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 19:38:58,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 19:38:58,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 19:38:58,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 19:38:58,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 19:38:58,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 19:38:58,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 19:38:58,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 19:38:58,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 19:38:58,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 19:38:58,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 19:38:58,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 19:38:58,896 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.epf [2019-12-18 19:38:58,929 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 19:38:58,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 19:38:58,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 19:38:58,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 19:38:58,935 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 19:38:58,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 19:38:58,935 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 19:38:58,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 19:38:58,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 19:38:58,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 19:38:58,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 19:38:58,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 19:38:58,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 19:38:58,936 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 19:38:58,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 19:38:58,937 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 19:38:58,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 19:38:58,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 19:38:58,937 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 19:38:58,937 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 19:38:58,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 19:38:58,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 19:38:58,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 19:38:58,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 19:38:58,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 19:38:58,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 19:38:58,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 19:38:58,941 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-18 19:38:58,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 19:38:58,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 19:38:59,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 19:38:59,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 19:38:59,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 19:38:59,238 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 19:38:59,238 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 19:38:59,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 19:38:59,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e4e106d/13f21b4c447e4ce49ef6cdd2d519e322/FLAG5b3c93544 [2019-12-18 19:38:59,827 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 19:38:59,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2019-12-18 19:38:59,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e4e106d/13f21b4c447e4ce49ef6cdd2d519e322/FLAG5b3c93544 [2019-12-18 19:39:00,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e4e106d/13f21b4c447e4ce49ef6cdd2d519e322 [2019-12-18 19:39:00,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 19:39:00,189 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 19:39:00,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 19:39:00,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 19:39:00,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 19:39:00,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7ed1fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00, skipping insertion in model container [2019-12-18 19:39:00,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 19:39:00,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 19:39:00,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:39:00,745 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 19:39:00,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 19:39:00,905 INFO L208 MainTranslator]: Completed translation [2019-12-18 19:39:00,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00 WrapperNode [2019-12-18 19:39:00,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 19:39:00,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 19:39:00,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 19:39:00,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 19:39:00,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 19:39:00,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 19:39:00,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 19:39:00,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 19:39:00,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:00,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (1/1) ... [2019-12-18 19:39:01,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 19:39:01,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 19:39:01,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 19:39:01,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 19:39:01,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (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 [2019-12-18 19:39:01,073 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 19:39:01,073 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 19:39:01,074 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 19:39:01,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 19:39:01,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 19:39:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 19:39:01,077 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 19:39:01,403 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 19:39:01,403 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 19:39:01,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:39:01 BoogieIcfgContainer [2019-12-18 19:39:01,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 19:39:01,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 19:39:01,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 19:39:01,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 19:39:01,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:39:00" (1/3) ... [2019-12-18 19:39:01,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3d1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:39:01, skipping insertion in model container [2019-12-18 19:39:01,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:39:00" (2/3) ... [2019-12-18 19:39:01,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3d1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:39:01, skipping insertion in model container [2019-12-18 19:39:01,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:39:01" (3/3) ... [2019-12-18 19:39:01,417 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-12-18 19:39:01,428 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 19:39:01,428 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 19:39:01,435 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 19:39:01,436 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 19:39:01,462 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,463 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,463 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,466 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,467 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,467 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,467 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,468 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,468 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,468 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,468 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,473 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,473 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,474 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,474 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,474 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,475 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,475 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,475 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,475 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,478 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,478 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,478 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,479 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,479 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,479 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,480 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,480 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,486 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,486 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,486 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,487 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,487 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,487 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,493 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,493 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,493 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,494 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,494 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,494 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 19:39:01,509 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 19:39:01,530 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 19:39:01,531 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 19:39:01,531 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 19:39:01,531 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 19:39:01,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 19:39:01,532 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 19:39:01,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 19:39:01,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 19:39:01,546 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-18 19:39:01,548 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 19:39:01,587 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 19:39:01,588 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:39:01,596 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. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 19:39:01,600 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-18 19:39:01,617 INFO L126 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-18 19:39:01,617 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 19:39:01,619 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. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-18 19:39:01,621 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-18 19:39:01,622 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-18 19:39:02,689 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-18 19:39:02,798 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-18 19:39:02,800 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-18 19:39:02,805 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-18 19:39:02,817 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 19:39:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 19:39:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-18 19:39:02,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:02,833 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-18 19:39:02,834 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-18 19:39:02,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:02,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960080921] [2019-12-18 19:39:02,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960080921] [2019-12-18 19:39:03,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:39:03,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-18 19:39:03,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308251092] [2019-12-18 19:39:03,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 19:39:03,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 19:39:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 19:39:03,116 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 19:39:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:03,163 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-18 19:39:03,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:39:03,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-18 19:39:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:03,197 INFO L225 Difference]: With dead ends: 48 [2019-12-18 19:39:03,197 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 19:39:03,198 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 [2019-12-18 19:39:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 19:39:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 19:39:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 19:39:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-18 19:39:03,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-18 19:39:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:03,241 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-18 19:39:03,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 19:39:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-18 19:39:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-18 19:39:03,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:03,242 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:03,243 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-18 19:39:03,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:03,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895530759] [2019-12-18 19:39:03,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895530759] [2019-12-18 19:39:03,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:39:03,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-18 19:39:03,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472231916] [2019-12-18 19:39:03,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-18 19:39:03,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:03,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-18 19:39:03,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:39:03,346 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-18 19:39:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:03,379 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 19:39:03,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 19:39:03,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-18 19:39:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:03,380 INFO L225 Difference]: With dead ends: 34 [2019-12-18 19:39:03,381 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 19:39:03,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-18 19:39:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 19:39:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 19:39:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 19:39:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 19:39:03,387 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-18 19:39:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:03,388 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 19:39:03,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-18 19:39:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 19:39:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:39:03,389 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:03,389 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:03,389 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:03,390 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-18 19:39:03,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:03,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203410038] [2019-12-18 19:39:03,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203410038] [2019-12-18 19:39:03,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:39:03,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:39:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796207994] [2019-12-18 19:39:03,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:39:03,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:39:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:39:03,457 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-18 19:39:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:03,491 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 19:39:03,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 19:39:03,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:39:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:03,494 INFO L225 Difference]: With dead ends: 34 [2019-12-18 19:39:03,494 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 19:39:03,495 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 19:39:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 19:39:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-18 19:39:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 19:39:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 19:39:03,502 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-18 19:39:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:03,505 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 19:39:03,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:39:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 19:39:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-18 19:39:03,506 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:03,506 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:03,506 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-18 19:39:03,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:03,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393716552] [2019-12-18 19:39:03,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393716552] [2019-12-18 19:39:03,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 19:39:03,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 19:39:03,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017030038] [2019-12-18 19:39:03,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 19:39:03,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 19:39:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 19:39:03,582 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-18 19:39:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:03,630 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 19:39:03,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:39:03,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-18 19:39:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:03,633 INFO L225 Difference]: With dead ends: 32 [2019-12-18 19:39:03,633 INFO L226 Difference]: Without dead ends: 28 [2019-12-18 19:39:03,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-18 19:39:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-18 19:39:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-18 19:39:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 19:39:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 19:39:03,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-18 19:39:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:03,639 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 19:39:03,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 19:39:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 19:39:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:39:03,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:03,640 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:03,641 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-18 19:39:03,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:03,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021112703] [2019-12-18 19:39:03,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021112703] [2019-12-18 19:39:03,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394843252] [2019-12-18 19:39:03,717 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 [2019-12-18 19:39:03,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 19:39:03,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:03,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:39:03,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:03,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:03,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 19:39:03,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679194973] [2019-12-18 19:39:03,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 19:39:03,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 19:39:03,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:39:03,836 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 7 states. [2019-12-18 19:39:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:03,889 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-18 19:39:03,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-18 19:39:03,891 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 19:39:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:03,894 INFO L225 Difference]: With dead ends: 32 [2019-12-18 19:39:03,894 INFO L226 Difference]: Without dead ends: 29 [2019-12-18 19:39:03,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-12-18 19:39:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-18 19:39:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-18 19:39:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-18 19:39:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-18 19:39:03,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-18 19:39:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:03,900 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-18 19:39:03,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 19:39:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-18 19:39:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-18 19:39:03,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:03,900 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:04,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:04,102 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-18 19:39:04,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:04,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82224567] [2019-12-18 19:39:04,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:04,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82224567] [2019-12-18 19:39:04,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503239432] [2019-12-18 19:39:04,159 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 [2019-12-18 19:39:04,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:39:04,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:04,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:39:04,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:04,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:04,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 19:39:04,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487364098] [2019-12-18 19:39:04,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 19:39:04,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 19:39:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 19:39:04,251 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-12-18 19:39:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:04,322 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-18 19:39:04,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 19:39:04,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-18 19:39:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:04,325 INFO L225 Difference]: With dead ends: 33 [2019-12-18 19:39:04,325 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 19:39:04,325 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:39:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 19:39:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 19:39:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 19:39:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-18 19:39:04,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-18 19:39:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:04,331 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-18 19:39:04,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 19:39:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-18 19:39:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:39:04,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:04,333 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:04,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:04,537 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:04,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-18 19:39:04,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:04,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151548754] [2019-12-18 19:39:04,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:04,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151548754] [2019-12-18 19:39:04,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879115023] [2019-12-18 19:39:04,600 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 [2019-12-18 19:39:04,655 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:39:04,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:04,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 19:39:04,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:04,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:04,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 19:39:04,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376345117] [2019-12-18 19:39:04,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:39:04,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:39:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:39:04,686 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 8 states. [2019-12-18 19:39:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:04,783 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-18 19:39:04,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:39:04,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 19:39:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:04,784 INFO L225 Difference]: With dead ends: 34 [2019-12-18 19:39:04,784 INFO L226 Difference]: Without dead ends: 31 [2019-12-18 19:39:04,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:39:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-18 19:39:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-18 19:39:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-18 19:39:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-18 19:39:04,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-18 19:39:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:04,790 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-18 19:39:04,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:39:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-18 19:39:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 19:39:04,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:04,794 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:04,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:04,996 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:04,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:04,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-18 19:39:04,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:04,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459341322] [2019-12-18 19:39:04,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:05,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459341322] [2019-12-18 19:39:05,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118155004] [2019-12-18 19:39:05,094 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 [2019-12-18 19:39:05,137 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-18 19:39:05,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:05,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:39:05,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:05,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:05,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-18 19:39:05,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973577070] [2019-12-18 19:39:05,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:39:05,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:39:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-18 19:39:05,161 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 8 states. [2019-12-18 19:39:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:05,261 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-18 19:39:05,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:39:05,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-18 19:39:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:05,263 INFO L225 Difference]: With dead ends: 35 [2019-12-18 19:39:05,263 INFO L226 Difference]: Without dead ends: 32 [2019-12-18 19:39:05,263 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:39:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-18 19:39:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-18 19:39:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-18 19:39:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-18 19:39:05,270 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-18 19:39:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:05,270 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-18 19:39:05,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:39:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-18 19:39:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:39:05,271 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:05,271 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:05,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:05,477 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:05,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-18 19:39:05,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:05,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422796149] [2019-12-18 19:39:05,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:05,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422796149] [2019-12-18 19:39:05,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32016765] [2019-12-18 19:39:05,561 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 [2019-12-18 19:39:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:05,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:39:05,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:05,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:05,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 19:39:05,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228958888] [2019-12-18 19:39:05,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 19:39:05,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 19:39:05,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 19:39:05,659 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 9 states. [2019-12-18 19:39:05,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:05,745 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-18 19:39:05,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 19:39:05,746 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 19:39:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:05,746 INFO L225 Difference]: With dead ends: 36 [2019-12-18 19:39:05,747 INFO L226 Difference]: Without dead ends: 33 [2019-12-18 19:39:05,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:39:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-18 19:39:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-18 19:39:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-18 19:39:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-18 19:39:05,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-18 19:39:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:05,751 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-18 19:39:05,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 19:39:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-18 19:39:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-18 19:39:05,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:05,752 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:05,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:05,953 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-18 19:39:05,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:05,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005115585] [2019-12-18 19:39:05,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:06,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005115585] [2019-12-18 19:39:06,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188158128] [2019-12-18 19:39:06,017 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 [2019-12-18 19:39:06,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:39:06,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:06,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 19:39:06,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:06,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:06,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 19:39:06,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809739010] [2019-12-18 19:39:06,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-18 19:39:06,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-18 19:39:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-18 19:39:06,082 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 9 states. [2019-12-18 19:39:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:06,186 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-18 19:39:06,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:39:06,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-18 19:39:06,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:06,187 INFO L225 Difference]: With dead ends: 37 [2019-12-18 19:39:06,187 INFO L226 Difference]: Without dead ends: 34 [2019-12-18 19:39:06,188 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:39:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-18 19:39:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-18 19:39:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-18 19:39:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-18 19:39:06,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-18 19:39:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:06,193 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-18 19:39:06,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-18 19:39:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-18 19:39:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:39:06,194 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:06,194 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:06,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:06,398 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:06,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-18 19:39:06,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:06,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612151093] [2019-12-18 19:39:06,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:06,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612151093] [2019-12-18 19:39:06,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795187865] [2019-12-18 19:39:06,509 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 [2019-12-18 19:39:06,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 19:39:06,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:06,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:39:06,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:06,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:06,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 19:39:06,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772522588] [2019-12-18 19:39:06,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:39:06,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:39:06,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:39:06,623 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 10 states. [2019-12-18 19:39:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:06,750 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-18 19:39:06,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:39:06,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 19:39:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:06,752 INFO L225 Difference]: With dead ends: 38 [2019-12-18 19:39:06,752 INFO L226 Difference]: Without dead ends: 35 [2019-12-18 19:39:06,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:39:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-18 19:39:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-18 19:39:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-18 19:39:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-18 19:39:06,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-18 19:39:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:06,756 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-18 19:39:06,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:39:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-18 19:39:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-18 19:39:06,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:06,757 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:06,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:06,963 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-18 19:39:06,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:06,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117576454] [2019-12-18 19:39:06,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:07,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117576454] [2019-12-18 19:39:07,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458017285] [2019-12-18 19:39:07,026 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 [2019-12-18 19:39:07,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:39:07,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:07,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 19:39:07,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:07,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:07,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 19:39:07,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255273497] [2019-12-18 19:39:07,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 19:39:07,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:07,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 19:39:07,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 19:39:07,096 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 10 states. [2019-12-18 19:39:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:07,250 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-18 19:39:07,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:39:07,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-18 19:39:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:07,251 INFO L225 Difference]: With dead ends: 39 [2019-12-18 19:39:07,251 INFO L226 Difference]: Without dead ends: 36 [2019-12-18 19:39:07,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-18 19:39:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-18 19:39:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-18 19:39:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-18 19:39:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-18 19:39:07,258 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-18 19:39:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:07,261 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-18 19:39:07,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 19:39:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-18 19:39:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:39:07,262 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:07,262 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:07,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:07,466 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:07,466 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-18 19:39:07,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:07,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074676479] [2019-12-18 19:39:07,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:07,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074676479] [2019-12-18 19:39:07,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663780979] [2019-12-18 19:39:07,540 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 [2019-12-18 19:39:07,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 19:39:07,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:07,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:39:07,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:07,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:07,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 19:39:07,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417639163] [2019-12-18 19:39:07,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 19:39:07,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 19:39:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:39:07,602 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 11 states. [2019-12-18 19:39:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:07,740 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-18 19:39:07,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 19:39:07,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 19:39:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:07,741 INFO L225 Difference]: With dead ends: 40 [2019-12-18 19:39:07,741 INFO L226 Difference]: Without dead ends: 37 [2019-12-18 19:39:07,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-18 19:39:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-18 19:39:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-18 19:39:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-18 19:39:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-18 19:39:07,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-18 19:39:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:07,748 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-18 19:39:07,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 19:39:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-18 19:39:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-18 19:39:07,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:07,748 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:07,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:07,949 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-18 19:39:07,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:07,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33776062] [2019-12-18 19:39:07,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:08,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33776062] [2019-12-18 19:39:08,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831586565] [2019-12-18 19:39:08,042 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 [2019-12-18 19:39:08,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 19:39:08,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:08,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 19:39:08,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:08,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:08,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-18 19:39:08,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497712313] [2019-12-18 19:39:08,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 19:39:08,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 19:39:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-18 19:39:08,158 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 11 states. [2019-12-18 19:39:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:08,315 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-18 19:39:08,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 19:39:08,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-18 19:39:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:08,316 INFO L225 Difference]: With dead ends: 41 [2019-12-18 19:39:08,316 INFO L226 Difference]: Without dead ends: 38 [2019-12-18 19:39:08,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-18 19:39:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-18 19:39:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-18 19:39:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-18 19:39:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-18 19:39:08,328 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-18 19:39:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:08,328 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-18 19:39:08,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 19:39:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-18 19:39:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:39:08,329 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:08,329 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:08,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:08,537 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-18 19:39:08,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:08,538 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823140100] [2019-12-18 19:39:08,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:08,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823140100] [2019-12-18 19:39:08,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544445603] [2019-12-18 19:39:08,620 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 [2019-12-18 19:39:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:08,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:39:08,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:08,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:08,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 19:39:08,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712908000] [2019-12-18 19:39:08,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:39:08,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:39:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:39:08,682 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 12 states. [2019-12-18 19:39:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:08,857 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-18 19:39:08,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:39:08,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 19:39:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:08,858 INFO L225 Difference]: With dead ends: 42 [2019-12-18 19:39:08,858 INFO L226 Difference]: Without dead ends: 39 [2019-12-18 19:39:08,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:39:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-18 19:39:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-18 19:39:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-18 19:39:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-18 19:39:08,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-18 19:39:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:08,863 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-18 19:39:08,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:39:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-18 19:39:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 19:39:08,864 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:08,864 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:09,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:09,067 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-18 19:39:09,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:09,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034422818] [2019-12-18 19:39:09,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:09,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034422818] [2019-12-18 19:39:09,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440391942] [2019-12-18 19:39:09,173 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 [2019-12-18 19:39:09,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:39:09,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:09,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 19:39:09,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:09,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:09,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 19:39:09,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582023177] [2019-12-18 19:39:09,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 19:39:09,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 19:39:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-18 19:39:09,250 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 12 states. [2019-12-18 19:39:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:09,418 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-18 19:39:09,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:39:09,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-18 19:39:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:09,419 INFO L225 Difference]: With dead ends: 43 [2019-12-18 19:39:09,419 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 19:39:09,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:39:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 19:39:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 19:39:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 19:39:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-18 19:39:09,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-18 19:39:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:09,424 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-18 19:39:09,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 19:39:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-18 19:39:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 19:39:09,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:09,425 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:09,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:09,629 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-18 19:39:09,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:09,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896605293] [2019-12-18 19:39:09,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:09,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896605293] [2019-12-18 19:39:09,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828350814] [2019-12-18 19:39:09,733 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 [2019-12-18 19:39:09,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 19:39:09,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:09,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:39:09,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:09,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:09,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 19:39:09,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347447456] [2019-12-18 19:39:09,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 19:39:09,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 19:39:09,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:39:09,812 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 13 states. [2019-12-18 19:39:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:09,995 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-18 19:39:09,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 19:39:09,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 19:39:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:09,996 INFO L225 Difference]: With dead ends: 44 [2019-12-18 19:39:09,996 INFO L226 Difference]: Without dead ends: 41 [2019-12-18 19:39:09,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-18 19:39:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-18 19:39:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-18 19:39:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-18 19:39:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-18 19:39:10,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-18 19:39:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:10,001 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-18 19:39:10,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 19:39:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-18 19:39:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-18 19:39:10,002 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:10,002 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:10,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:10,205 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-18 19:39:10,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:10,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062860683] [2019-12-18 19:39:10,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:10,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062860683] [2019-12-18 19:39:10,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313609879] [2019-12-18 19:39:10,310 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 [2019-12-18 19:39:10,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 19:39:10,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:10,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 19:39:10,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:10,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:10,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 19:39:10,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381770935] [2019-12-18 19:39:10,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 19:39:10,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:10,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 19:39:10,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-18 19:39:10,387 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-12-18 19:39:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:10,556 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-18 19:39:10,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 19:39:10,557 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-18 19:39:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:10,558 INFO L225 Difference]: With dead ends: 45 [2019-12-18 19:39:10,558 INFO L226 Difference]: Without dead ends: 42 [2019-12-18 19:39:10,558 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-18 19:39:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-18 19:39:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-18 19:39:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-18 19:39:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-18 19:39:10,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-18 19:39:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:10,562 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-18 19:39:10,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 19:39:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-18 19:39:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 19:39:10,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:10,562 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:10,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:10,766 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-18 19:39:10,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:10,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382494636] [2019-12-18 19:39:10,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:10,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382494636] [2019-12-18 19:39:10,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299046939] [2019-12-18 19:39:10,886 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 [2019-12-18 19:39:10,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 19:39:10,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:10,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 19:39:10,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:10,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:10,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 19:39:10,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723695193] [2019-12-18 19:39:10,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:39:10,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:39:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:39:10,956 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 14 states. [2019-12-18 19:39:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:11,211 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-18 19:39:11,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:39:11,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 19:39:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:11,213 INFO L225 Difference]: With dead ends: 46 [2019-12-18 19:39:11,213 INFO L226 Difference]: Without dead ends: 43 [2019-12-18 19:39:11,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:39:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-18 19:39:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-18 19:39:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-18 19:39:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-18 19:39:11,217 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-18 19:39:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:11,217 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-18 19:39:11,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:39:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-18 19:39:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-18 19:39:11,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:11,218 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:11,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:11,421 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-18 19:39:11,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:11,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455921202] [2019-12-18 19:39:11,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:11,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455921202] [2019-12-18 19:39:11,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621960160] [2019-12-18 19:39:11,510 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 [2019-12-18 19:39:11,564 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 19:39:11,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:11,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 19:39:11,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:11,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 19:39:11,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 19:39:11,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047401266] [2019-12-18 19:39:11,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 19:39:11,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 19:39:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 19:39:11,588 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 14 states. [2019-12-18 19:39:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:11,770 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-18 19:39:11,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 19:39:11,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-18 19:39:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:11,776 INFO L225 Difference]: With dead ends: 47 [2019-12-18 19:39:11,776 INFO L226 Difference]: Without dead ends: 44 [2019-12-18 19:39:11,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2019-12-18 19:39:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-18 19:39:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-18 19:39:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-18 19:39:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-18 19:39:11,779 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-18 19:39:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:11,779 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-18 19:39:11,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 19:39:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-18 19:39:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 19:39:11,780 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:11,780 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:11,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:11,984 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:11,984 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-18 19:39:11,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:11,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102073107] [2019-12-18 19:39:11,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:12,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102073107] [2019-12-18 19:39:12,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364033423] [2019-12-18 19:39:12,044 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 [2019-12-18 19:39:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:12,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:39:12,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:12,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:39:12,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-12-18 19:39:12,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028697556] [2019-12-18 19:39:12,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:39:12,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:12,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:39:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 19:39:12,120 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-12-18 19:39:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:12,133 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-12-18 19:39:12,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:39:12,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 19:39:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:12,134 INFO L225 Difference]: With dead ends: 96 [2019-12-18 19:39:12,134 INFO L226 Difference]: Without dead ends: 30 [2019-12-18 19:39:12,134 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-12-18 19:39:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-18 19:39:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-18 19:39:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-18 19:39:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-12-18 19:39:12,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-12-18 19:39:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:12,137 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-12-18 19:39:12,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:39:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-12-18 19:39:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-18 19:39:12,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 19:39:12,141 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 19:39:12,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:12,344 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 19:39:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 19:39:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-18 19:39:12,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 19:39:12,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140185739] [2019-12-18 19:39:12,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 19:39:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 19:39:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:12,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140185739] [2019-12-18 19:39:12,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366395457] [2019-12-18 19:39:12,452 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 [2019-12-18 19:39:12,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 19:39:12,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 19:39:12,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 19:39:12,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 19:39:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 19:39:12,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 19:39:12,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2019-12-18 19:39:12,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665015787] [2019-12-18 19:39:12,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 19:39:12,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 19:39:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 19:39:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:39:12,647 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-12-18 19:39:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 19:39:12,682 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-18 19:39:12,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-18 19:39:12,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-18 19:39:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 19:39:12,683 INFO L225 Difference]: With dead ends: 46 [2019-12-18 19:39:12,683 INFO L226 Difference]: Without dead ends: 0 [2019-12-18 19:39:12,683 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 19:39:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-18 19:39:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-18 19:39:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-18 19:39:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-18 19:39:12,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-12-18 19:39:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 19:39:12,685 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-18 19:39:12,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 19:39:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-18 19:39:12,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-18 19:39:12,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 19:39:12,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:39:12 BasicIcfg [2019-12-18 19:39:12,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 19:39:12,891 INFO L168 Benchmark]: Toolchain (without parser) took 12702.67 ms. Allocated memory was 145.8 MB in the beginning and 312.5 MB in the end (delta: 166.7 MB). Free memory was 100.7 MB in the beginning and 281.9 MB in the end (delta: -181.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 19:39:12,894 INFO L168 Benchmark]: CDTParser took 1.11 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 19:39:12,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.78 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.5 MB in the beginning and 164.3 MB in the end (delta: -63.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2019-12-18 19:39:12,898 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.04 ms. Allocated memory is still 203.9 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-18 19:39:12,904 INFO L168 Benchmark]: Boogie Preprocessor took 30.44 ms. Allocated memory is still 203.9 MB. Free memory was 162.3 MB in the beginning and 161.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-18 19:39:12,904 INFO L168 Benchmark]: RCFGBuilder took 398.87 ms. Allocated memory is still 203.9 MB. Free memory was 161.0 MB in the beginning and 141.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-18 19:39:12,905 INFO L168 Benchmark]: TraceAbstraction took 11483.48 ms. Allocated memory was 203.9 MB in the beginning and 312.5 MB in the end (delta: 108.5 MB). Free memory was 141.1 MB in the beginning and 281.9 MB in the end (delta: -140.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 19:39:12,907 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 715.78 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 100.5 MB in the beginning and 164.3 MB in the end (delta: -63.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.04 ms. Allocated memory is still 203.9 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.44 ms. Allocated memory is still 203.9 MB. Free memory was 162.3 MB in the beginning and 161.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.87 ms. Allocated memory is still 203.9 MB. Free memory was 161.0 MB in the beginning and 141.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11483.48 ms. Allocated memory was 203.9 MB in the beginning and 312.5 MB in the end (delta: 108.5 MB). Free memory was 141.1 MB in the beginning and 281.9 MB in the end (delta: -140.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.2s, 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: 11.3s, OverallIterations: 22, TraceHistogramMax: 6, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 270 SDtfs, 633 SDslu, 445 SDs, 0 SdLazy, 508 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 485 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=20, 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, 22 MinimizatonAttempts, 90 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 534 NumberOfCodeBlocks, 534 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 494 ConstructedInterpolants, 0 QuantifiedInterpolants, 21188 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1782 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 70/380 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...