/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:56:42,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:56:42,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:56:43,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:56:43,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:56:43,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:56:43,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:56:43,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:56:43,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:56:43,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:56:43,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:56:43,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:56:43,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:56:43,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:56:43,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:56:43,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:56:43,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:56:43,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:56:43,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:56:43,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:56:43,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:56:43,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:56:43,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:56:43,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:56:43,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 23:56:43,046 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:56:43,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:56:43,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:56:43,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:56:43,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:56:43,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:56:43,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:56:43,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:56:43,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:56:43,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:56:43,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:56:43,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-05 23:56:43,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:56:43,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:56:43,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:56:43,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:56:43,076 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:56:43,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:56:43,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:56:43,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:56:43,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:56:43,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:56:43,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:56:43,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:56:43,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:56:43,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:56:43,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:56:43,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:56:43,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:56:43,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:56:43,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:56:43,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:56:43,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:56:43,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:56:43,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:56:43,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-05 23:56:43,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:56:43,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:56:43,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:56:43,081 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-05 23:56:43,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-05 23:56:43,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:56:43,082 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-05 23:56:43,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:56:43,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:56:43,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:56:43,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:56:43,389 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:56:43,390 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-10-05 23:56:43,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c82eedcd/c0e066f4c3f5479a88529c1a3a04e907/FLAGf5bd89a78 [2020-10-05 23:56:43,976 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:56:43,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sigma.i [2020-10-05 23:56:44,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c82eedcd/c0e066f4c3f5479a88529c1a3a04e907/FLAGf5bd89a78 [2020-10-05 23:56:44,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c82eedcd/c0e066f4c3f5479a88529c1a3a04e907 [2020-10-05 23:56:44,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:56:44,434 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:56:44,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:56:44,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:56:44,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:56:44,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:56:44" (1/1) ... [2020-10-05 23:56:44,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b45ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:44, skipping insertion in model container [2020-10-05 23:56:44,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:56:44" (1/1) ... [2020-10-05 23:56:44,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:56:44,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:56:45,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:56:45,328 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:56:45,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:56:45,561 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:56:45,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45 WrapperNode [2020-10-05 23:56:45,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:56:45,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:56:45,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:56:45,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:56:45,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:56:45,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:56:45,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:56:45,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:56:45,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... [2020-10-05 23:56:45,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:56:45,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:56:45,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:56:45,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:56:45,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:56:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:56:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-05 23:56:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:56:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-05 23:56:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:56:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-05 23:56:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-05 23:56:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-05 23:56:45,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-05 23:56:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:56:45,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:56:45,747 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:56:46,179 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:56:46,180 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-05 23:56:46,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:56:46 BoogieIcfgContainer [2020-10-05 23:56:46,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:56:46,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:56:46,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:56:46,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:56:46,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:56:44" (1/3) ... [2020-10-05 23:56:46,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263aa7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:56:46, skipping insertion in model container [2020-10-05 23:56:46,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:56:45" (2/3) ... [2020-10-05 23:56:46,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263aa7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:56:46, skipping insertion in model container [2020-10-05 23:56:46,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:56:46" (3/3) ... [2020-10-05 23:56:46,202 INFO L109 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-10-05 23:56:46,213 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:56:46,214 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:56:46,222 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:56:46,223 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:56:46,247 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,247 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,247 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,247 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,248 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,248 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,252 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,252 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,252 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,253 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:46,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:56:46,296 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:56:46,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:56:46,296 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:56:46,296 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:56:46,296 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:56:46,296 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:56:46,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:56:46,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:56:46,314 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-05 23:56:46,316 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-05 23:56:46,367 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-05 23:56:46,368 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-05 23:56:46,372 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-05 23:56:46,374 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-05 23:56:46,400 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-05 23:56:46,400 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-05 23:56:46,401 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-10-05 23:56:46,402 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 344 [2020-10-05 23:56:46,403 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:56:47,888 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-05 23:56:48,263 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-05 23:56:48,376 INFO L206 etLargeBlockEncoding]: Checked pairs total: 293 [2020-10-05 23:56:48,376 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2020-10-05 23:56:48,380 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-10-05 23:56:48,389 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-10-05 23:56:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-05 23:56:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:56:48,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:48,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:56:48,399 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-10-05 23:56:48,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:48,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773062395] [2020-10-05 23:56:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:56:48,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773062395] [2020-10-05 23:56:48,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:48,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:56:48,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2146492595] [2020-10-05 23:56:48,609 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:48,612 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:48,625 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:56:48,625 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:48,629 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:48,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:56:48,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:56:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:48,648 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-05 23:56:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:48,686 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-05 23:56:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:56:48,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:56:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:48,697 INFO L225 Difference]: With dead ends: 36 [2020-10-05 23:56:48,697 INFO L226 Difference]: Without dead ends: 31 [2020-10-05 23:56:48,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-05 23:56:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-05 23:56:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-05 23:56:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-10-05 23:56:48,734 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-10-05 23:56:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:48,735 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-10-05 23:56:48,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:56:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-10-05 23:56:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-05 23:56:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:48,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:48,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:56:48,737 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-10-05 23:56:48,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:48,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096467048] [2020-10-05 23:56:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:56:48,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096467048] [2020-10-05 23:56:48,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:48,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:56:48,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1499530645] [2020-10-05 23:56:48,836 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:48,838 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:48,842 INFO L258 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-10-05 23:56:48,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:48,843 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:48,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:48,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:48,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:48,845 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-10-05 23:56:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:48,885 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-10-05 23:56:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:48,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-05 23:56:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:48,888 INFO L225 Difference]: With dead ends: 28 [2020-10-05 23:56:48,889 INFO L226 Difference]: Without dead ends: 28 [2020-10-05 23:56:48,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-05 23:56:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-05 23:56:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-05 23:56:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-05 23:56:48,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-10-05 23:56:48,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:48,896 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-05 23:56:48,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-05 23:56:48,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:56:48,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:48,897 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-10-05 23:56:48,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 23:56:48,897 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-10-05 23:56:48,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:48,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126402911] [2020-10-05 23:56:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:48,953 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:48,995 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:49,031 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:56:49,031 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:56:49,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 23:56:49,032 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:56:49,033 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:56:49,033 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-05 23:56:49,040 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,040 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,040 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,040 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,041 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,041 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,042 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,042 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,042 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,043 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,043 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,044 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,045 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,045 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,045 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:49,048 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:56:49,048 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:56:49,048 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:56:49,048 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:56:49,048 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:56:49,049 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:56:49,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:56:49,049 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:56:49,049 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:56:49,051 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-05 23:56:49,051 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-05 23:56:49,088 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-05 23:56:49,089 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-05 23:56:49,089 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-05 23:56:49,092 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-05 23:56:49,125 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-05 23:56:49,125 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-05 23:56:49,126 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-10-05 23:56:49,128 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 824 [2020-10-05 23:56:49,128 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:56:50,524 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:56:50,781 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:56:51,087 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-05 23:56:51,210 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-05 23:56:51,226 INFO L206 etLargeBlockEncoding]: Checked pairs total: 676 [2020-10-05 23:56:51,226 INFO L214 etLargeBlockEncoding]: Total number of compositions: 79 [2020-10-05 23:56:51,227 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-10-05 23:56:51,232 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-10-05 23:56:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-10-05 23:56:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:56:51,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:51,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:56:51,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-10-05 23:56:51,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:51,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071643822] [2020-10-05 23:56:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:56:51,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071643822] [2020-10-05 23:56:51,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:51,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:56:51,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [694225843] [2020-10-05 23:56:51,274 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:51,274 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:51,275 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:56:51,275 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:51,276 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:51,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:56:51,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:56:51,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:51,277 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-10-05 23:56:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:51,301 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-10-05 23:56:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:56:51,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:56:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:51,305 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:56:51,305 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:56:51,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:56:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-05 23:56:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-05 23:56:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-10-05 23:56:51,321 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-10-05 23:56:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-10-05 23:56:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:56:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-10-05 23:56:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:56:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:51,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:51,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 23:56:51,323 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:51,323 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-10-05 23:56:51,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:51,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690033515] [2020-10-05 23:56:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:56:51,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690033515] [2020-10-05 23:56:51,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:51,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:56:51,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069537690] [2020-10-05 23:56:51,377 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:51,378 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:51,381 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:56:51,381 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:51,382 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:51,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:51,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:51,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:51,383 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-10-05 23:56:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:51,435 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-10-05 23:56:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:51,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:56:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:51,437 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:56:51,437 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:56:51,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:56:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-05 23:56:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-05 23:56:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-05 23:56:51,449 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-10-05 23:56:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:51,450 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-05 23:56:51,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-05 23:56:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:56:51,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:51,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:51,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 23:56:51,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:51,452 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-10-05 23:56:51,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:51,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620076074] [2020-10-05 23:56:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:51,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620076074] [2020-10-05 23:56:51,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572290356] [2020-10-05 23:56:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:56:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:51,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:51,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:56:51,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1337307807] [2020-10-05 23:56:51,660 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:51,663 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:51,668 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:56:51,668 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:51,694 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:51,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:51,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:51,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:51,695 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 4 states. [2020-10-05 23:56:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:51,724 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-10-05 23:56:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:51,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:56:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:51,726 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:56:51,726 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:56:51,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:56:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-05 23:56:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-05 23:56:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-05 23:56:51,736 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-10-05 23:56:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:51,737 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-05 23:56:51,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-05 23:56:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:56:51,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:51,738 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-10-05 23:56:51,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:56:51,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-10-05 23:56:51,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:51,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106996849] [2020-10-05 23:56:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:51,976 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:51,996 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:52,004 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:56:52,005 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:56:52,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-05 23:56:52,005 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:56:52,006 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:56:52,007 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-05 23:56:52,013 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,013 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,013 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,014 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,014 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,015 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,015 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,016 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,016 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,016 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,016 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,016 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,017 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,017 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,017 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,019 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,019 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,019 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,019 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,020 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,021 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,021 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,021 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:52,024 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:56:52,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:56:52,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:56:52,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:56:52,024 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:56:52,025 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:56:52,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:56:52,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:56:52,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:56:52,027 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-05 23:56:52,027 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-05 23:56:52,098 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-05 23:56:52,099 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-05 23:56:52,100 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-05 23:56:52,110 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-05 23:56:52,158 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-05 23:56:52,158 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-05 23:56:52,160 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-10-05 23:56:52,165 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1320 [2020-10-05 23:56:52,165 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:56:53,880 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-05 23:56:54,160 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-05 23:56:54,278 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1092 [2020-10-05 23:56:54,278 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-10-05 23:56:54,279 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-10-05 23:56:54,297 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-10-05 23:56:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-10-05 23:56:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:56:54,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:54,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:56:54,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-10-05 23:56:54,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:54,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63576787] [2020-10-05 23:56:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:56:54,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63576787] [2020-10-05 23:56:54,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:54,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:56:54,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2133639397] [2020-10-05 23:56:54,322 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:54,323 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:54,323 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:56:54,323 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:54,324 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:56:54,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:56:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:54,325 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-10-05 23:56:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:54,348 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-10-05 23:56:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:56:54,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:56:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:54,352 INFO L225 Difference]: With dead ends: 297 [2020-10-05 23:56:54,352 INFO L226 Difference]: Without dead ends: 268 [2020-10-05 23:56:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-05 23:56:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-05 23:56:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-05 23:56:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-10-05 23:56:54,374 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-10-05 23:56:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:54,374 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-10-05 23:56:54,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:56:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-10-05 23:56:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:56:54,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:54,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:54,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-05 23:56:54,376 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-10-05 23:56:54,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:54,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986511899] [2020-10-05 23:56:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:56:54,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986511899] [2020-10-05 23:56:54,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:54,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:56:54,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313490564] [2020-10-05 23:56:54,413 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:54,414 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:54,415 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:56:54,415 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:54,416 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:54,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:54,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:54,417 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-10-05 23:56:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:54,450 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-10-05 23:56:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:54,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:56:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:54,454 INFO L225 Difference]: With dead ends: 299 [2020-10-05 23:56:54,454 INFO L226 Difference]: Without dead ends: 299 [2020-10-05 23:56:54,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-05 23:56:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-10-05 23:56:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-05 23:56:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-10-05 23:56:54,471 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-10-05 23:56:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:54,472 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-10-05 23:56:54,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-10-05 23:56:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:56:54,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:54,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:54,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-05 23:56:54,474 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-10-05 23:56:54,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:54,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702587353] [2020-10-05 23:56:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:54,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702587353] [2020-10-05 23:56:54,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557003238] [2020-10-05 23:56:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:56:54,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:54,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:54,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:56:54,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [805046463] [2020-10-05 23:56:54,600 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:54,603 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:54,606 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:56:54,607 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:54,632 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:54,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:54,633 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 4 states. [2020-10-05 23:56:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:54,672 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-10-05 23:56:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:54,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:56:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:54,674 INFO L225 Difference]: With dead ends: 275 [2020-10-05 23:56:54,675 INFO L226 Difference]: Without dead ends: 275 [2020-10-05 23:56:54,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-05 23:56:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-10-05 23:56:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-05 23:56:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-10-05 23:56:54,686 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-10-05 23:56:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:54,686 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-10-05 23:56:54,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-10-05 23:56:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:56:54,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:54,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:54,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 23:56:54,893 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-10-05 23:56:54,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:54,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120934185] [2020-10-05 23:56:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:54,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120934185] [2020-10-05 23:56:54,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514376943] [2020-10-05 23:56:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:56:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:55,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:55,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:56:55,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2020241326] [2020-10-05 23:56:55,055 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:55,059 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:55,065 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:56:55,065 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:55,076 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:55,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:56:55,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:56:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:56:55,077 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 5 states. [2020-10-05 23:56:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:55,118 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-10-05 23:56:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:56:55,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:56:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:55,121 INFO L225 Difference]: With dead ends: 271 [2020-10-05 23:56:55,121 INFO L226 Difference]: Without dead ends: 271 [2020-10-05 23:56:55,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:56:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-05 23:56:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-10-05 23:56:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-05 23:56:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-10-05 23:56:55,130 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-10-05 23:56:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:55,131 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-10-05 23:56:55,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:56:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-10-05 23:56:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:56:55,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:55,133 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-10-05 23:56:55,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-05 23:56:55,347 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:55,347 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-10-05 23:56:55,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:55,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311903234] [2020-10-05 23:56:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:55,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:55,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:55,398 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:56:55,399 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:56:55,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-05 23:56:55,399 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:56:55,400 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:56:55,400 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-05 23:56:55,407 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,407 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,408 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,408 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,408 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,408 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,408 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,409 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,410 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,411 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,411 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,411 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,411 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,411 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,412 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,412 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,412 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,412 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,414 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,414 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,414 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,414 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,415 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,415 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,416 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,416 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,417 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,417 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,417 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,418 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:55,421 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:56:55,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:56:55,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:56:55,421 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:56:55,422 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:56:55,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:56:55,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:56:55,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:56:55,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:56:55,423 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-05 23:56:55,423 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-05 23:56:55,496 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-05 23:56:55,496 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-05 23:56:55,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-05 23:56:55,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-05 23:56:55,619 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-05 23:56:55,620 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-05 23:56:55,622 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-10-05 23:56:55,633 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1872 [2020-10-05 23:56:55,634 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:56:56,933 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-05 23:56:57,297 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-05 23:56:57,605 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-05 23:56:57,727 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1730 [2020-10-05 23:56:57,727 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-10-05 23:56:57,728 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-10-05 23:56:57,756 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-10-05 23:56:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-10-05 23:56:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:56:57,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:57,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:56:57,757 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-10-05 23:56:57,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:57,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942387670] [2020-10-05 23:56:57,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:56:57,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942387670] [2020-10-05 23:56:57,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:57,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:56:57,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605889632] [2020-10-05 23:56:57,778 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:57,779 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:57,779 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:56:57,779 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:57,779 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:57,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:56:57,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:56:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:57,780 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-10-05 23:56:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:57,806 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-10-05 23:56:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:56:57,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:56:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:57,813 INFO L225 Difference]: With dead ends: 817 [2020-10-05 23:56:57,813 INFO L226 Difference]: Without dead ends: 734 [2020-10-05 23:56:57,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:56:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-05 23:56:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-05 23:56:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-05 23:56:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-10-05 23:56:57,840 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-10-05 23:56:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:57,841 INFO L479 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-10-05 23:56:57,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:56:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-10-05 23:56:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:56:57,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:57,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:57,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-05 23:56:57,842 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:57,842 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-10-05 23:56:57,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:57,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218654513] [2020-10-05 23:56:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:56:57,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218654513] [2020-10-05 23:56:57,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:56:57,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:56:57,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [754522490] [2020-10-05 23:56:57,875 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:57,876 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:57,877 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:56:57,878 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:57,878 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:57,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:57,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:57,879 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-10-05 23:56:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:57,920 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-10-05 23:56:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:57,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:56:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:57,927 INFO L225 Difference]: With dead ends: 843 [2020-10-05 23:56:57,927 INFO L226 Difference]: Without dead ends: 843 [2020-10-05 23:56:57,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:56:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-05 23:56:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-10-05 23:56:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-10-05 23:56:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-10-05 23:56:57,954 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-10-05 23:56:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:57,954 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-10-05 23:56:57,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-10-05 23:56:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:56:57,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:57,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:57,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-05 23:56:57,956 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:57,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-10-05 23:56:57,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:57,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891546981] [2020-10-05 23:56:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:57,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891546981] [2020-10-05 23:56:57,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064309215] [2020-10-05 23:56:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:56:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:58,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:58,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:56:58,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406556905] [2020-10-05 23:56:58,097 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:58,100 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:58,104 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:56:58,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:58,130 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:58,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:56:58,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:58,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:56:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:58,131 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 4 states. [2020-10-05 23:56:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:58,177 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-10-05 23:56:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:56:58,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:56:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:58,184 INFO L225 Difference]: With dead ends: 779 [2020-10-05 23:56:58,184 INFO L226 Difference]: Without dead ends: 779 [2020-10-05 23:56:58,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:56:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-05 23:56:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-10-05 23:56:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-05 23:56:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-10-05 23:56:58,212 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-10-05 23:56:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:58,212 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-10-05 23:56:58,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:56:58,212 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-10-05 23:56:58,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:56:58,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:58,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:58,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:58,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:58,429 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-10-05 23:56:58,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:58,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816754682] [2020-10-05 23:56:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:58,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816754682] [2020-10-05 23:56:58,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351566363] [2020-10-05 23:56:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:56:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:58,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:58,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:56:58,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319643484] [2020-10-05 23:56:58,637 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:58,640 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:58,645 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:56:58,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:58,658 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:58,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:56:58,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:56:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:56:58,659 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 5 states. [2020-10-05 23:56:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:58,703 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-10-05 23:56:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:56:58,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:56:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:58,708 INFO L225 Difference]: With dead ends: 775 [2020-10-05 23:56:58,709 INFO L226 Difference]: Without dead ends: 775 [2020-10-05 23:56:58,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:56:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-05 23:56:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-10-05 23:56:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-10-05 23:56:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-10-05 23:56:58,733 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-10-05 23:56:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:58,733 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-10-05 23:56:58,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:56:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-10-05 23:56:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:56:58,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:58,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:58,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:56:58,949 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-10-05 23:56:58,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:58,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72011660] [2020-10-05 23:56:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:59,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72011660] [2020-10-05 23:56:59,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120337351] [2020-10-05 23:56:59,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:56:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:56:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:56:59,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:56:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:56:59,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:56:59,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:56:59,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1652149408] [2020-10-05 23:56:59,148 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:56:59,154 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:56:59,161 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-05 23:56:59,162 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:56:59,188 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:56:59,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:56:59,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:56:59,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:56:59,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:56:59,189 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 6 states. [2020-10-05 23:56:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:56:59,239 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-10-05 23:56:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:56:59,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:56:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:56:59,245 INFO L225 Difference]: With dead ends: 767 [2020-10-05 23:56:59,245 INFO L226 Difference]: Without dead ends: 767 [2020-10-05 23:56:59,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:56:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-05 23:56:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-10-05 23:56:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-05 23:56:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-10-05 23:56:59,267 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-10-05 23:56:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:56:59,268 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-10-05 23:56:59,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:56:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-10-05 23:56:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:56:59,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:56:59,269 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-05 23:56:59,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:56:59,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:56:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:56:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-10-05 23:56:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:56:59,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920715942] [2020-10-05 23:56:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:56:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:59,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:56:59,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:56:59,530 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:56:59,530 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:56:59,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-05 23:56:59,531 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:56:59,531 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:56:59,531 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:56:59,532 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-05 23:56:59,539 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,539 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,539 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,540 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,541 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,542 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,543 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,544 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,544 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,544 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,544 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,545 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,545 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,546 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,546 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,547 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,547 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,547 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,547 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,548 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,548 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,548 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,549 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,550 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,550 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,550 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,550 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:56:59,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:56:59,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:56:59,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:56:59,554 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:56:59,555 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:56:59,555 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:56:59,555 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:56:59,555 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:56:59,555 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:56:59,556 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-05 23:56:59,556 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-05 23:56:59,690 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-05 23:56:59,690 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-05 23:56:59,695 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-05 23:56:59,718 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-05 23:56:59,887 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-05 23:56:59,887 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-05 23:56:59,892 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-10-05 23:56:59,912 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2480 [2020-10-05 23:56:59,912 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:57:01,474 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-05 23:57:01,765 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-05 23:57:01,858 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1953 [2020-10-05 23:57:01,858 INFO L214 etLargeBlockEncoding]: Total number of compositions: 87 [2020-10-05 23:57:01,859 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-10-05 23:57:01,973 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-10-05 23:57:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-10-05 23:57:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:57:01,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:01,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:57:01,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-10-05 23:57:01,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:01,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217880565] [2020-10-05 23:57:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:57:01,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217880565] [2020-10-05 23:57:01,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:01,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:57:01,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403100505] [2020-10-05 23:57:01,993 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:01,993 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:01,994 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:57:01,994 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:01,995 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:01,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:57:01,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:01,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:57:01,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:01,996 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-10-05 23:57:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:02,039 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-10-05 23:57:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:57:02,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:57:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:02,056 INFO L225 Difference]: With dead ends: 2289 [2020-10-05 23:57:02,057 INFO L226 Difference]: Without dead ends: 2044 [2020-10-05 23:57:02,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-05 23:57:02,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-10-05 23:57:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-10-05 23:57:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-10-05 23:57:02,145 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-10-05 23:57:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:02,145 INFO L479 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-10-05 23:57:02,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:57:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-10-05 23:57:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:57:02,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:02,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:02,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-05 23:57:02,146 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-10-05 23:57:02,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:02,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249304797] [2020-10-05 23:57:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:57:02,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249304797] [2020-10-05 23:57:02,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:02,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:57:02,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [797309007] [2020-10-05 23:57:02,177 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:02,178 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:02,179 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:57:02,179 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:02,180 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:02,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:02,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:02,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:02,181 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-10-05 23:57:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:02,223 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-10-05 23:57:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:02,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:57:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:02,240 INFO L225 Difference]: With dead ends: 2379 [2020-10-05 23:57:02,240 INFO L226 Difference]: Without dead ends: 2379 [2020-10-05 23:57:02,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-05 23:57:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-10-05 23:57:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-10-05 23:57:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-10-05 23:57:02,321 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-10-05 23:57:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:02,321 INFO L479 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-10-05 23:57:02,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-10-05 23:57:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:57:02,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:02,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:02,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-05 23:57:02,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-10-05 23:57:02,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:02,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513837537] [2020-10-05 23:57:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:02,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513837537] [2020-10-05 23:57:02,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819928419] [2020-10-05 23:57:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:57:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:02,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:02,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:57:02,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1861033527] [2020-10-05 23:57:02,446 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:02,449 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:02,452 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:57:02,452 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:02,471 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:02,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:02,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:02,472 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 4 states. [2020-10-05 23:57:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:02,519 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-10-05 23:57:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:02,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:57:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:02,534 INFO L225 Difference]: With dead ends: 2219 [2020-10-05 23:57:02,535 INFO L226 Difference]: Without dead ends: 2219 [2020-10-05 23:57:02,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-10-05 23:57:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-10-05 23:57:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-10-05 23:57:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-10-05 23:57:02,646 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-10-05 23:57:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:02,646 INFO L479 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-10-05 23:57:02,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-10-05 23:57:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:57:02,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:02,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:02,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:02,860 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:02,861 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-10-05 23:57:02,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:02,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425018425] [2020-10-05 23:57:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:02,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425018425] [2020-10-05 23:57:02,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86072668] [2020-10-05 23:57:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:57:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:02,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:02,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:57:02,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [909413249] [2020-10-05 23:57:02,997 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:03,000 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:03,005 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:57:03,005 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:03,016 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:03,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:57:03,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:03,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:57:03,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:03,017 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 5 states. [2020-10-05 23:57:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:03,057 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-10-05 23:57:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:57:03,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:57:03,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:03,072 INFO L225 Difference]: With dead ends: 2215 [2020-10-05 23:57:03,072 INFO L226 Difference]: Without dead ends: 2215 [2020-10-05 23:57:03,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-05 23:57:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-10-05 23:57:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-10-05 23:57:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-10-05 23:57:03,137 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-10-05 23:57:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:03,137 INFO L479 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-10-05 23:57:03,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:57:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-10-05 23:57:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:57:03,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:03,139 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:03,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:57:03,353 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:03,354 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-10-05 23:57:03,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:03,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268695088] [2020-10-05 23:57:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:03,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268695088] [2020-10-05 23:57:03,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397788033] [2020-10-05 23:57:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:57:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:03,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:03,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:57:03,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404572826] [2020-10-05 23:57:03,558 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:03,565 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:03,575 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-05 23:57:03,575 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:03,589 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:03,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:57:03,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:57:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:03,590 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 6 states. [2020-10-05 23:57:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:03,649 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-10-05 23:57:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:57:03,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:57:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:03,667 INFO L225 Difference]: With dead ends: 2207 [2020-10-05 23:57:03,667 INFO L226 Difference]: Without dead ends: 2207 [2020-10-05 23:57:03,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-10-05 23:57:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-10-05 23:57:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-10-05 23:57:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-10-05 23:57:03,739 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-10-05 23:57:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:03,740 INFO L479 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-10-05 23:57:03,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:57:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-10-05 23:57:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:57:03,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:03,742 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:03,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:03,955 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-10-05 23:57:03,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:03,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148416927] [2020-10-05 23:57:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:04,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148416927] [2020-10-05 23:57:04,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829566189] [2020-10-05 23:57:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:57:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:04,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:04,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:57:04,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1736019750] [2020-10-05 23:57:04,175 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:04,183 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:04,249 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-05 23:57:04,250 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:04,262 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:04,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:57:04,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:57:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:04,264 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 7 states. [2020-10-05 23:57:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:04,330 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-10-05 23:57:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:57:04,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-05 23:57:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:04,352 INFO L225 Difference]: With dead ends: 2191 [2020-10-05 23:57:04,352 INFO L226 Difference]: Without dead ends: 2191 [2020-10-05 23:57:04,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-10-05 23:57:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-10-05 23:57:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-10-05 23:57:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-10-05 23:57:04,425 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-10-05 23:57:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:04,426 INFO L479 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-10-05 23:57:04,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:57:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-10-05 23:57:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:57:04,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:04,428 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:04,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:04,642 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-10-05 23:57:04,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:04,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58602993] [2020-10-05 23:57:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:04,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:04,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:04,694 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:57:04,695 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:57:04,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-05 23:57:04,695 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:57:04,695 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:57:04,696 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:57:04,696 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,705 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,706 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,707 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,708 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,709 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,710 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,710 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,710 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,710 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,711 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,711 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,712 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,712 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,713 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,713 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,713 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,713 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,714 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,714 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,714 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,715 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,716 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,716 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,716 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,716 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,718 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,718 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,718 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:04,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:57:04,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:57:04,724 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:57:04,724 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:57:04,724 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:57:04,724 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:57:04,724 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:57:04,724 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:57:04,724 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:57:04,726 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-05 23:57:04,726 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-05 23:57:05,006 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-05 23:57:05,006 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-05 23:57:05,017 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-05 23:57:05,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-05 23:57:05,358 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-05 23:57:05,358 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-05 23:57:05,365 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-10-05 23:57:05,394 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3144 [2020-10-05 23:57:05,394 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:57:06,998 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-05 23:57:07,313 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-05 23:57:07,423 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2432 [2020-10-05 23:57:07,423 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-10-05 23:57:07,423 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-10-05 23:57:07,663 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-10-05 23:57:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-10-05 23:57:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:57:07,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:07,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:57:07,664 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:07,664 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-10-05 23:57:07,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:07,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825074699] [2020-10-05 23:57:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:57:07,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825074699] [2020-10-05 23:57:07,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:07,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:57:07,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [774778023] [2020-10-05 23:57:07,683 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:07,683 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:07,683 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:57:07,684 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:07,684 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:07,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:57:07,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:57:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:07,685 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-10-05 23:57:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:07,743 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-10-05 23:57:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:57:07,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:57:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:07,766 INFO L225 Difference]: With dead ends: 6529 [2020-10-05 23:57:07,766 INFO L226 Difference]: Without dead ends: 5798 [2020-10-05 23:57:07,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-05 23:57:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-10-05 23:57:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-10-05 23:57:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-10-05 23:57:07,956 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-10-05 23:57:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:07,956 INFO L479 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-10-05 23:57:07,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:57:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-10-05 23:57:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:57:07,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:07,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:07,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-05 23:57:07,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-10-05 23:57:07,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:07,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699896586] [2020-10-05 23:57:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:57:07,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699896586] [2020-10-05 23:57:07,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:07,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:57:07,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [685351561] [2020-10-05 23:57:07,997 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:07,998 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:07,999 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:57:07,999 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:07,999 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:07,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:08,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:08,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:08,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:08,001 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-10-05 23:57:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:08,064 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-10-05 23:57:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:08,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:57:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:08,088 INFO L225 Difference]: With dead ends: 6779 [2020-10-05 23:57:08,088 INFO L226 Difference]: Without dead ends: 6779 [2020-10-05 23:57:08,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-10-05 23:57:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-10-05 23:57:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-10-05 23:57:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-10-05 23:57:08,426 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-10-05 23:57:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:08,426 INFO L479 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-10-05 23:57:08,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-10-05 23:57:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:57:08,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:08,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:08,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-05 23:57:08,427 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-10-05 23:57:08,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:08,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204397779] [2020-10-05 23:57:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:08,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204397779] [2020-10-05 23:57:08,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503611447] [2020-10-05 23:57:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:57:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:57:08,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:08,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:08,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:57:08,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1915389270] [2020-10-05 23:57:08,538 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:08,540 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:08,542 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:57:08,542 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:08,562 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:08,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:08,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:08,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:08,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:08,564 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 4 states. [2020-10-05 23:57:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:08,622 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-10-05 23:57:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:08,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:57:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:08,640 INFO L225 Difference]: With dead ends: 6395 [2020-10-05 23:57:08,641 INFO L226 Difference]: Without dead ends: 6395 [2020-10-05 23:57:08,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-10-05 23:57:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-10-05 23:57:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-05 23:57:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-10-05 23:57:08,835 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-10-05 23:57:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:08,836 INFO L479 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-10-05 23:57:08,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-10-05 23:57:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:57:08,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:08,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:09,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 23:57:09,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-10-05 23:57:09,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:09,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992694096] [2020-10-05 23:57:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:09,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992694096] [2020-10-05 23:57:09,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015984903] [2020-10-05 23:57:09,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:57:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:09,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:09,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:57:09,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575777766] [2020-10-05 23:57:09,219 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:09,224 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:09,227 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:57:09,228 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:09,248 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:09,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:57:09,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:57:09,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:09,249 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 5 states. [2020-10-05 23:57:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:09,311 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-10-05 23:57:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:57:09,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:57:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:09,328 INFO L225 Difference]: With dead ends: 6391 [2020-10-05 23:57:09,328 INFO L226 Difference]: Without dead ends: 6391 [2020-10-05 23:57:09,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-10-05 23:57:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-10-05 23:57:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-10-05 23:57:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-10-05 23:57:09,616 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-10-05 23:57:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:09,617 INFO L479 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-10-05 23:57:09,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:57:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-10-05 23:57:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:57:09,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:09,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:09,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 23:57:09,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-10-05 23:57:09,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:09,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588975676] [2020-10-05 23:57:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:09,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588975676] [2020-10-05 23:57:09,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862505876] [2020-10-05 23:57:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:57:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:10,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:10,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:57:10,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1704236474] [2020-10-05 23:57:10,010 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:10,015 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:10,022 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-05 23:57:10,022 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:10,032 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:10,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:57:10,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:10,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:57:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:10,033 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 6 states. [2020-10-05 23:57:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:10,099 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-10-05 23:57:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:57:10,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:57:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:10,115 INFO L225 Difference]: With dead ends: 6383 [2020-10-05 23:57:10,115 INFO L226 Difference]: Without dead ends: 6383 [2020-10-05 23:57:10,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-10-05 23:57:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-10-05 23:57:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-10-05 23:57:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-10-05 23:57:10,275 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-10-05 23:57:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:10,276 INFO L479 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-10-05 23:57:10,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:57:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-10-05 23:57:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:57:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:10,278 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:10,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:10,491 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-10-05 23:57:10,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:10,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959716572] [2020-10-05 23:57:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:10,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959716572] [2020-10-05 23:57:10,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034492700] [2020-10-05 23:57:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:57:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:10,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:10,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:57:10,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1204894552] [2020-10-05 23:57:10,717 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:10,730 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:10,744 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-05 23:57:10,744 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:10,756 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:10,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:57:10,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:57:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:10,757 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 7 states. [2020-10-05 23:57:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:10,989 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-10-05 23:57:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:57:10,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-05 23:57:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:11,008 INFO L225 Difference]: With dead ends: 6367 [2020-10-05 23:57:11,008 INFO L226 Difference]: Without dead ends: 6367 [2020-10-05 23:57:11,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-10-05 23:57:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-10-05 23:57:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-10-05 23:57:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-10-05 23:57:11,256 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-10-05 23:57:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:11,256 INFO L479 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-10-05 23:57:11,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:57:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-10-05 23:57:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:57:11,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:11,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:11,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:11,480 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-10-05 23:57:11,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:11,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057594989] [2020-10-05 23:57:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:11,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057594989] [2020-10-05 23:57:11,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684339828] [2020-10-05 23:57:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:11,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:57:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:11,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:11,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 23:57:11,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342468221] [2020-10-05 23:57:11,851 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:11,868 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:11,887 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-05 23:57:11,888 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:11,900 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:11,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:57:11,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:57:11,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:57:11,902 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 8 states. [2020-10-05 23:57:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:12,022 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-10-05 23:57:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:57:12,023 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-05 23:57:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:12,045 INFO L225 Difference]: With dead ends: 6335 [2020-10-05 23:57:12,045 INFO L226 Difference]: Without dead ends: 6335 [2020-10-05 23:57:12,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:57:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-10-05 23:57:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-10-05 23:57:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-10-05 23:57:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-10-05 23:57:12,279 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-10-05 23:57:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:12,280 INFO L479 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-10-05 23:57:12,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:57:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-10-05 23:57:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:57:12,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:12,285 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:12,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 23:57:12,500 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-10-05 23:57:12,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:12,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418179791] [2020-10-05 23:57:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:12,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:12,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:12,560 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:57:12,561 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:57:12,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-05 23:57:12,561 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:57:12,562 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:57:12,562 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-05 23:57:12,573 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,574 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,574 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,574 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,574 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,574 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,575 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,575 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,575 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,575 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,576 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,577 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,578 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,579 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,579 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,579 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,579 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,581 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,581 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,582 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,582 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,584 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,584 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,585 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,586 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,588 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,588 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,588 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,588 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,589 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,590 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,591 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,591 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,591 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,593 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,593 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,593 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:12,598 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:57:12,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:57:12,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:57:12,599 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:57:12,599 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:57:12,599 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:57:12,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:57:12,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:57:12,599 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:57:12,601 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-05 23:57:12,601 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-05 23:57:13,198 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-05 23:57:13,199 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-05 23:57:13,225 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-05 23:57:13,305 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-05 23:57:13,944 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-05 23:57:13,945 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-05 23:57:13,960 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-10-05 23:57:14,024 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3864 [2020-10-05 23:57:14,024 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:57:15,753 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-05 23:57:16,138 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-05 23:57:16,244 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-05 23:57:16,249 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3124 [2020-10-05 23:57:16,249 INFO L214 etLargeBlockEncoding]: Total number of compositions: 95 [2020-10-05 23:57:16,250 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-10-05 23:57:17,395 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-10-05 23:57:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-10-05 23:57:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:57:17,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:17,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:57:17,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-10-05 23:57:17,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:17,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660914967] [2020-10-05 23:57:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:57:17,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660914967] [2020-10-05 23:57:17,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:17,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:57:17,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074494940] [2020-10-05 23:57:17,418 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:17,419 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:17,419 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:57:17,419 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:17,419 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:17,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:57:17,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:57:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:17,420 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-10-05 23:57:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:17,584 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-10-05 23:57:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:57:17,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:57:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:17,640 INFO L225 Difference]: With dead ends: 18897 [2020-10-05 23:57:17,640 INFO L226 Difference]: Without dead ends: 16708 [2020-10-05 23:57:17,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-10-05 23:57:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-10-05 23:57:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-10-05 23:57:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-10-05 23:57:19,006 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-10-05 23:57:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:19,006 INFO L479 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-10-05 23:57:19,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:57:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-10-05 23:57:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:57:19,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:19,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:19,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-05 23:57:19,007 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-10-05 23:57:19,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:19,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669789761] [2020-10-05 23:57:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:57:19,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669789761] [2020-10-05 23:57:19,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:19,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:57:19,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048074373] [2020-10-05 23:57:19,041 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:19,041 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:19,043 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:57:19,043 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:19,043 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:19,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:19,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:19,044 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-10-05 23:57:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:19,164 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-10-05 23:57:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:19,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:57:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:19,207 INFO L225 Difference]: With dead ends: 19531 [2020-10-05 23:57:19,208 INFO L226 Difference]: Without dead ends: 19531 [2020-10-05 23:57:19,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-10-05 23:57:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-10-05 23:57:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-10-05 23:57:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-10-05 23:57:20,075 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-10-05 23:57:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:20,075 INFO L479 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-10-05 23:57:20,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-10-05 23:57:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:57:20,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:20,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:20,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-05 23:57:20,076 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-10-05 23:57:20,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:20,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648764613] [2020-10-05 23:57:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:20,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648764613] [2020-10-05 23:57:20,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692641509] [2020-10-05 23:57:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:57:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:20,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:20,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:57:20,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [772606533] [2020-10-05 23:57:20,203 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:20,205 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:20,208 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:57:20,208 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:20,223 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:20,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:20,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:20,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:20,224 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 4 states. [2020-10-05 23:57:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:20,318 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-10-05 23:57:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:20,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:57:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:20,360 INFO L225 Difference]: With dead ends: 18635 [2020-10-05 23:57:20,360 INFO L226 Difference]: Without dead ends: 18635 [2020-10-05 23:57:20,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-10-05 23:57:20,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-10-05 23:57:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-10-05 23:57:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-10-05 23:57:22,221 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-10-05 23:57:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:22,222 INFO L479 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-10-05 23:57:22,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-10-05 23:57:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:57:22,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:22,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:22,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:22,423 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:22,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:22,424 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-10-05 23:57:22,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:22,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244850394] [2020-10-05 23:57:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:22,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244850394] [2020-10-05 23:57:22,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885978838] [2020-10-05 23:57:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2020-10-05 23:57:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:57:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:22,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:22,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:57:22,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [964216322] [2020-10-05 23:57:22,590 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:22,594 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:22,598 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:57:22,598 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:22,604 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:22,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:57:22,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:57:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:22,605 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 5 states. [2020-10-05 23:57:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:22,753 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-10-05 23:57:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:57:22,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:57:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:22,823 INFO L225 Difference]: With dead ends: 18631 [2020-10-05 23:57:22,823 INFO L226 Difference]: Without dead ends: 18631 [2020-10-05 23:57:22,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-10-05 23:57:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-10-05 23:57:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-10-05 23:57:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-10-05 23:57:23,345 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-10-05 23:57:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:23,345 INFO L479 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-10-05 23:57:23,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:57:23,345 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-10-05 23:57:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:57:23,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:23,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 23:57:23,547 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-10-05 23:57:23,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:23,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186996155] [2020-10-05 23:57:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:23,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186996155] [2020-10-05 23:57:23,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810615979] [2020-10-05 23:57:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:57:23,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:23,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:23,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:57:23,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [699035381] [2020-10-05 23:57:23,729 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:23,735 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:23,743 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-05 23:57:23,743 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:23,748 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:23,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:57:23,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:23,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:57:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:23,749 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 6 states. [2020-10-05 23:57:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:24,088 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-10-05 23:57:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:57:24,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:57:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:24,164 INFO L225 Difference]: With dead ends: 18623 [2020-10-05 23:57:24,164 INFO L226 Difference]: Without dead ends: 18623 [2020-10-05 23:57:24,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-10-05 23:57:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-10-05 23:57:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-10-05 23:57:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-10-05 23:57:24,894 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-10-05 23:57:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:24,894 INFO L479 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-10-05 23:57:24,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:57:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-10-05 23:57:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:57:24,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:24,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:25,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 23:57:25,112 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-10-05 23:57:25,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:25,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511977102] [2020-10-05 23:57:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:25,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511977102] [2020-10-05 23:57:25,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135254673] [2020-10-05 23:57:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:57:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:25,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:25,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:57:25,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1702423425] [2020-10-05 23:57:25,336 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:25,344 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:25,355 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-05 23:57:25,355 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:25,360 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:25,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:57:25,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:57:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:25,361 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 7 states. [2020-10-05 23:57:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:25,497 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-10-05 23:57:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:57:25,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-05 23:57:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:25,537 INFO L225 Difference]: With dead ends: 18607 [2020-10-05 23:57:25,538 INFO L226 Difference]: Without dead ends: 18607 [2020-10-05 23:57:25,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:57:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-10-05 23:57:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-10-05 23:57:26,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-10-05 23:57:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-10-05 23:57:26,154 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-10-05 23:57:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:26,154 INFO L479 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-10-05 23:57:26,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:57:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-10-05 23:57:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:57:26,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:26,159 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:26,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 23:57:26,373 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-10-05 23:57:26,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:26,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734011614] [2020-10-05 23:57:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:26,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734011614] [2020-10-05 23:57:26,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69011950] [2020-10-05 23:57:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:57:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:26,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:26,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 23:57:26,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211249475] [2020-10-05 23:57:26,608 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:26,619 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:26,634 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-05 23:57:26,635 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:26,642 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:26,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:57:26,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:57:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:57:26,643 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 8 states. [2020-10-05 23:57:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:26,781 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-10-05 23:57:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:57:26,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-05 23:57:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:26,836 INFO L225 Difference]: With dead ends: 18575 [2020-10-05 23:57:26,836 INFO L226 Difference]: Without dead ends: 18575 [2020-10-05 23:57:26,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:57:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-10-05 23:57:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-10-05 23:57:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-10-05 23:57:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-10-05 23:57:27,430 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-10-05 23:57:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:27,430 INFO L479 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-10-05 23:57:27,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:57:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-10-05 23:57:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:57:27,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:27,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:27,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 23:57:27,637 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-10-05 23:57:27,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:27,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72895593] [2020-10-05 23:57:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:27,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72895593] [2020-10-05 23:57:27,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387494396] [2020-10-05 23:57:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:57:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:27,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:27,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 23:57:27,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1861887432] [2020-10-05 23:57:27,936 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:27,949 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:27,971 INFO L258 McrAutomatonBuilder]: Finished intersection with 50 states and 51 transitions. [2020-10-05 23:57:27,972 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:27,977 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:27,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:57:27,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:57:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:57:27,978 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 9 states. [2020-10-05 23:57:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:28,135 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-10-05 23:57:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:57:28,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-05 23:57:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:28,192 INFO L225 Difference]: With dead ends: 18511 [2020-10-05 23:57:28,192 INFO L226 Difference]: Without dead ends: 18511 [2020-10-05 23:57:28,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:57:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-10-05 23:57:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-10-05 23:57:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-10-05 23:57:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-10-05 23:57:28,614 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-10-05 23:57:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:28,614 INFO L479 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-10-05 23:57:28,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:57:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-10-05 23:57:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:57:28,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:28,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:28,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:28,824 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-10-05 23:57:28,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:28,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876898430] [2020-10-05 23:57:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:28,846 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:57:29,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:57:29,034 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:57:29,035 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:57:29,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-05 23:57:29,035 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:57:29,036 WARN L363 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:57:29,036 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-05 23:57:29,055 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,056 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,057 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,058 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,058 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,058 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,059 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,060 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,061 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,062 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,063 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,064 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,065 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,065 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,065 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,068 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,069 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,069 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,069 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,073 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,073 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,073 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,073 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,074 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,074 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,075 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,075 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,076 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,076 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,076 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,076 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,077 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,077 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,077 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,078 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,079 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,079 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,079 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,079 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,080 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,080 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,080 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,081 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:57:29,086 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:57:29,087 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:57:29,087 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:57:29,087 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:57:29,087 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:57:29,087 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:57:29,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:57:29,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:57:29,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:57:29,089 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-05 23:57:29,089 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-05 23:57:30,065 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-05 23:57:30,066 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-05 23:57:30,109 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-05 23:57:30,239 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-05 23:57:31,177 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-05 23:57:31,177 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-05 23:57:31,222 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-10-05 23:57:31,358 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4640 [2020-10-05 23:57:31,359 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:57:32,769 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-10-05 23:57:33,234 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-05 23:57:33,816 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-05 23:57:33,942 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-05 23:57:33,965 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3851 [2020-10-05 23:57:33,966 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-10-05 23:57:33,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-10-05 23:57:40,583 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-10-05 23:57:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-10-05 23:57:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:57:40,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:40,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:57:40,584 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-10-05 23:57:40,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:40,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585234885] [2020-10-05 23:57:40,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:57:40,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585234885] [2020-10-05 23:57:40,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:40,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:57:40,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1215978252] [2020-10-05 23:57:40,607 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:40,607 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:40,608 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:57:40,608 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:40,608 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:40,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:57:40,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:40,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:57:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:40,610 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-10-05 23:57:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:41,144 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-10-05 23:57:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:57:41,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:57:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:41,279 INFO L225 Difference]: With dead ends: 55297 [2020-10-05 23:57:41,279 INFO L226 Difference]: Without dead ends: 48734 [2020-10-05 23:57:41,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:57:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-10-05 23:57:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-10-05 23:57:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-10-05 23:57:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-10-05 23:57:44,637 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-10-05 23:57:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:44,638 INFO L479 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-10-05 23:57:44,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:57:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-10-05 23:57:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:57:44,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:44,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:44,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-05 23:57:44,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-10-05 23:57:44,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:44,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616851822] [2020-10-05 23:57:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:57:44,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616851822] [2020-10-05 23:57:44,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:57:44,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:57:44,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1034631211] [2020-10-05 23:57:44,668 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:44,669 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:44,669 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:57:44,670 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:44,670 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:44,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:44,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:44,671 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-10-05 23:57:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:44,962 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-10-05 23:57:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:44,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:57:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:45,111 INFO L225 Difference]: With dead ends: 56827 [2020-10-05 23:57:45,112 INFO L226 Difference]: Without dead ends: 56827 [2020-10-05 23:57:45,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:57:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-10-05 23:57:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-10-05 23:57:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-10-05 23:57:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-10-05 23:57:47,172 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-10-05 23:57:47,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:47,173 INFO L479 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-10-05 23:57:47,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-10-05 23:57:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:57:47,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:47,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:47,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-05 23:57:47,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-10-05 23:57:47,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:47,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83605072] [2020-10-05 23:57:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:47,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83605072] [2020-10-05 23:57:47,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388024227] [2020-10-05 23:57:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:57:47,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:47,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:47,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:57:47,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1177454851] [2020-10-05 23:57:47,295 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:47,297 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:47,300 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:57:47,300 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:47,320 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:47,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:57:47,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:57:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:47,321 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 4 states. [2020-10-05 23:57:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:48,279 INFO L93 Difference]: Finished difference Result 54779 states and 219669 transitions. [2020-10-05 23:57:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:57:48,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-05 23:57:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:48,427 INFO L225 Difference]: With dead ends: 54779 [2020-10-05 23:57:48,427 INFO L226 Difference]: Without dead ends: 54779 [2020-10-05 23:57:48,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:57:49,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54779 states. [2020-10-05 23:57:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54779 to 54779. [2020-10-05 23:57:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54779 states. [2020-10-05 23:57:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54779 states to 54779 states and 219669 transitions. [2020-10-05 23:57:53,453 INFO L78 Accepts]: Start accepts. Automaton has 54779 states and 219669 transitions. Word has length 17 [2020-10-05 23:57:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:53,454 INFO L479 AbstractCegarLoop]: Abstraction has 54779 states and 219669 transitions. [2020-10-05 23:57:53,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:57:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54779 states and 219669 transitions. [2020-10-05 23:57:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:57:53,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:53,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:53,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:53,663 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:53,663 INFO L82 PathProgramCache]: Analyzing trace with hash 911691700, now seen corresponding path program 1 times [2020-10-05 23:57:53,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:53,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532281627] [2020-10-05 23:57:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:53,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532281627] [2020-10-05 23:57:53,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805834839] [2020-10-05 23:57:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:57:53,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:53,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:53,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-05 23:57:53,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1937056245] [2020-10-05 23:57:53,828 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:53,838 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:53,844 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-05 23:57:53,845 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:53,867 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:53,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:57:53,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:57:53,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:53,868 INFO L87 Difference]: Start difference. First operand 54779 states and 219669 transitions. Second operand 5 states. [2020-10-05 23:57:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:54,146 INFO L93 Difference]: Finished difference Result 54775 states and 219657 transitions. [2020-10-05 23:57:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:57:54,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-05 23:57:54,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:54,292 INFO L225 Difference]: With dead ends: 54775 [2020-10-05 23:57:54,293 INFO L226 Difference]: Without dead ends: 54775 [2020-10-05 23:57:54,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:57:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54775 states. [2020-10-05 23:57:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54775 to 54775. [2020-10-05 23:57:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54775 states. [2020-10-05 23:57:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54775 states to 54775 states and 219657 transitions. [2020-10-05 23:57:56,478 INFO L78 Accepts]: Start accepts. Automaton has 54775 states and 219657 transitions. Word has length 23 [2020-10-05 23:57:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:57:56,479 INFO L479 AbstractCegarLoop]: Abstraction has 54775 states and 219657 transitions. [2020-10-05 23:57:56,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:57:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 54775 states and 219657 transitions. [2020-10-05 23:57:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:57:56,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:57:56,480 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:57:56,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 23:57:56,681 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:57:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:57:56,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1882146136, now seen corresponding path program 1 times [2020-10-05 23:57:56,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:57:56,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640091827] [2020-10-05 23:57:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:57:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:56,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640091827] [2020-10-05 23:57:56,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705982931] [2020-10-05 23:57:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:57:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:57:56,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:57:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:57:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:57:56,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:57:56,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-05 23:57:56,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1601642725] [2020-10-05 23:57:56,861 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:57:56,866 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:57:56,874 INFO L258 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-10-05 23:57:56,874 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:57:56,885 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:57:56,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:57:56,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:57:56,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:57:56,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:56,887 INFO L87 Difference]: Start difference. First operand 54775 states and 219657 transitions. Second operand 6 states. [2020-10-05 23:57:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:57:57,942 INFO L93 Difference]: Finished difference Result 54767 states and 219629 transitions. [2020-10-05 23:57:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:57:57,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:57:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:57:58,099 INFO L225 Difference]: With dead ends: 54767 [2020-10-05 23:57:58,099 INFO L226 Difference]: Without dead ends: 54767 [2020-10-05 23:57:58,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:57:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54767 states. [2020-10-05 23:57:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54767 to 54767. [2020-10-05 23:57:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54767 states. [2020-10-05 23:58:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54767 states to 54767 states and 219629 transitions. [2020-10-05 23:58:03,154 INFO L78 Accepts]: Start accepts. Automaton has 54767 states and 219629 transitions. Word has length 29 [2020-10-05 23:58:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:58:03,154 INFO L479 AbstractCegarLoop]: Abstraction has 54767 states and 219629 transitions. [2020-10-05 23:58:03,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:58:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 54767 states and 219629 transitions. [2020-10-05 23:58:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:58:03,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:58:03,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:58:03,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:03,357 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:58:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:58:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -290777765, now seen corresponding path program 1 times [2020-10-05 23:58:03,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:58:03,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459820623] [2020-10-05 23:58:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:58:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:03,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459820623] [2020-10-05 23:58:03,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631462595] [2020-10-05 23:58:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:58:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:58:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:03,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:58:03,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-05 23:58:03,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [598443726] [2020-10-05 23:58:03,569 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:58:03,576 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:58:03,587 INFO L258 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-10-05 23:58:03,587 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:58:03,598 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:58:03,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:58:03,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:58:03,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:58:03,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:58:03,600 INFO L87 Difference]: Start difference. First operand 54767 states and 219629 transitions. Second operand 7 states. [2020-10-05 23:58:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:58:04,004 INFO L93 Difference]: Finished difference Result 54751 states and 219565 transitions. [2020-10-05 23:58:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:58:04,005 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-05 23:58:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:58:04,143 INFO L225 Difference]: With dead ends: 54751 [2020-10-05 23:58:04,144 INFO L226 Difference]: Without dead ends: 54751 [2020-10-05 23:58:04,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:58:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2020-10-05 23:58:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 54751. [2020-10-05 23:58:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54751 states. [2020-10-05 23:58:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54751 states to 54751 states and 219565 transitions. [2020-10-05 23:58:06,019 INFO L78 Accepts]: Start accepts. Automaton has 54751 states and 219565 transitions. Word has length 35 [2020-10-05 23:58:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:58:06,020 INFO L479 AbstractCegarLoop]: Abstraction has 54751 states and 219565 transitions. [2020-10-05 23:58:06,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:58:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 54751 states and 219565 transitions. [2020-10-05 23:58:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-05 23:58:06,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:58:06,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:58:06,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 23:58:06,230 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:58:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:58:06,230 INFO L82 PathProgramCache]: Analyzing trace with hash 460274813, now seen corresponding path program 1 times [2020-10-05 23:58:06,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:58:06,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715297148] [2020-10-05 23:58:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:58:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:06,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715297148] [2020-10-05 23:58:06,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864063815] [2020-10-05 23:58:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:58:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:58:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:06,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:58:06,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-05 23:58:06,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2126496151] [2020-10-05 23:58:06,465 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:58:06,471 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:58:06,483 INFO L258 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-10-05 23:58:06,484 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:58:06,500 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:58:06,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:58:06,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:58:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:58:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:58:06,501 INFO L87 Difference]: Start difference. First operand 54751 states and 219565 transitions. Second operand 8 states. [2020-10-05 23:58:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:58:07,054 INFO L93 Difference]: Finished difference Result 54719 states and 219421 transitions. [2020-10-05 23:58:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:58:07,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-05 23:58:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:58:07,306 INFO L225 Difference]: With dead ends: 54719 [2020-10-05 23:58:07,307 INFO L226 Difference]: Without dead ends: 54719 [2020-10-05 23:58:07,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:58:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54719 states. [2020-10-05 23:58:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54719 to 54719. [2020-10-05 23:58:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54719 states. [2020-10-05 23:58:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54719 states to 54719 states and 219421 transitions. [2020-10-05 23:58:09,774 INFO L78 Accepts]: Start accepts. Automaton has 54719 states and 219421 transitions. Word has length 41 [2020-10-05 23:58:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:58:09,774 INFO L479 AbstractCegarLoop]: Abstraction has 54719 states and 219421 transitions. [2020-10-05 23:58:09,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:58:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54719 states and 219421 transitions. [2020-10-05 23:58:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-05 23:58:09,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:58:09,782 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:58:09,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 23:58:09,997 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:58:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:58:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -964712578, now seen corresponding path program 1 times [2020-10-05 23:58:09,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:58:09,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715148774] [2020-10-05 23:58:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:58:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:10,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715148774] [2020-10-05 23:58:10,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285170190] [2020-10-05 23:58:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:58:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:58:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:10,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:58:10,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-05 23:58:10,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534509710] [2020-10-05 23:58:10,269 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:58:10,277 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:58:10,292 INFO L258 McrAutomatonBuilder]: Finished intersection with 50 states and 51 transitions. [2020-10-05 23:58:10,292 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:58:10,310 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:58:10,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:58:10,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:58:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:58:10,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:58:10,311 INFO L87 Difference]: Start difference. First operand 54719 states and 219421 transitions. Second operand 9 states. [2020-10-05 23:58:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:58:10,868 INFO L93 Difference]: Finished difference Result 54655 states and 219101 transitions. [2020-10-05 23:58:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:58:11,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-05 23:58:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:58:11,601 INFO L225 Difference]: With dead ends: 54655 [2020-10-05 23:58:11,601 INFO L226 Difference]: Without dead ends: 54655 [2020-10-05 23:58:11,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:58:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54655 states. [2020-10-05 23:58:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54655 to 54655. [2020-10-05 23:58:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54655 states. [2020-10-05 23:58:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54655 states to 54655 states and 219101 transitions. [2020-10-05 23:58:13,269 INFO L78 Accepts]: Start accepts. Automaton has 54655 states and 219101 transitions. Word has length 47 [2020-10-05 23:58:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:58:13,269 INFO L479 AbstractCegarLoop]: Abstraction has 54655 states and 219101 transitions. [2020-10-05 23:58:13,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:58:13,269 INFO L276 IsEmpty]: Start isEmpty. Operand 54655 states and 219101 transitions. [2020-10-05 23:58:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-05 23:58:13,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:58:13,284 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:58:13,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 23:58:13,495 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:58:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:58:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1558950686, now seen corresponding path program 1 times [2020-10-05 23:58:13,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:58:13,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011553832] [2020-10-05 23:58:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:58:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:13,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011553832] [2020-10-05 23:58:13,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146775056] [2020-10-05 23:58:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:58:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:58:13,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:58:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:58:13,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:58:13,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-05 23:58:13,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064032931] [2020-10-05 23:58:13,785 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:58:13,795 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:58:13,822 INFO L258 McrAutomatonBuilder]: Finished intersection with 56 states and 57 transitions. [2020-10-05 23:58:13,822 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:58:13,838 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:58:13,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:58:13,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:58:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:58:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:58:13,839 INFO L87 Difference]: Start difference. First operand 54655 states and 219101 transitions. Second operand 10 states. [2020-10-05 23:58:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:58:14,513 INFO L93 Difference]: Finished difference Result 54527 states and 218397 transitions. [2020-10-05 23:58:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:58:14,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-05 23:58:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:58:14,659 INFO L225 Difference]: With dead ends: 54527 [2020-10-05 23:58:14,660 INFO L226 Difference]: Without dead ends: 54527 [2020-10-05 23:58:14,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:58:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54527 states. [2020-10-05 23:58:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54527 to 54527. [2020-10-05 23:58:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54527 states. [2020-10-05 23:58:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54527 states to 54527 states and 218397 transitions. [2020-10-05 23:58:16,174 INFO L78 Accepts]: Start accepts. Automaton has 54527 states and 218397 transitions. Word has length 53 [2020-10-05 23:58:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:58:16,175 INFO L479 AbstractCegarLoop]: Abstraction has 54527 states and 218397 transitions. [2020-10-05 23:58:16,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:58:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54527 states and 218397 transitions. [2020-10-05 23:58:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-05 23:58:16,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:58:16,181 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forcibly destroying the process [2020-10-05 23:58:16,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:58:16,515 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:58:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:58:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-10-05 23:58:16,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:58:16,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006069260] [2020-10-05 23:58:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:58:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:58:16,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:58:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:58:16,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:58:16,568 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:58:16,568 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:58:16,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-05 23:58:16,568 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-05 23:58:16,569 WARN L363 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-05 23:58:16,569 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-05 23:58:16,579 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,580 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,581 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,582 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,583 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,584 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,585 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,586 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,587 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,590 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,590 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,591 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,594 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,594 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,595 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,596 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,596 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,596 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,597 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,597 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,597 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,597 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,598 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,598 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,599 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,599 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,600 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,600 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,600 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,600 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,601 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,601 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,601 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,602 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,603 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,603 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,603 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,603 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:58:16,609 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-05 23:58:16,610 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:58:16,610 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:58:16,610 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:58:16,610 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-10-05 23:58:16,610 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:58:16,610 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:58:16,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:58:16,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:58:16,612 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-05 23:58:16,612 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-05 23:58:18,725 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-05 23:58:18,726 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-05 23:58:18,876 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-05 23:58:19,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-05 23:58:21,673 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-05 23:58:21,674 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-05 23:58:21,816 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-10-05 23:58:22,249 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5472 [2020-10-05 23:58:22,250 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:58:24,207 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-05 23:58:24,559 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-05 23:58:24,858 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-05 23:58:24,953 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4378 [2020-10-05 23:58:24,954 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-10-05 23:58:24,954 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-10-05 23:59:07,629 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-10-05 23:59:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-10-05 23:59:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-05 23:59:07,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:59:07,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-05 23:59:07,630 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:59:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:59:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-10-05 23:59:07,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:59:07,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606372299] [2020-10-05 23:59:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:59:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:59:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:59:07,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606372299] [2020-10-05 23:59:07,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:59:07,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:59:07,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898902019] [2020-10-05 23:59:07,646 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:59:07,647 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:59:07,647 INFO L258 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-10-05 23:59:07,647 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:59:07,647 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:59:07,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:59:07,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:59:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:59:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:59:07,648 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-10-05 23:59:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:59:09,527 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-10-05 23:59:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:59:09,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-05 23:59:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:59:10,043 INFO L225 Difference]: With dead ends: 163089 [2020-10-05 23:59:10,044 INFO L226 Difference]: Without dead ends: 143404 [2020-10-05 23:59:10,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:59:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-10-05 23:59:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143404 to 143404. [2020-10-05 23:59:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143404 states. [2020-10-05 23:59:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143404 states to 143404 states and 638584 transitions. [2020-10-05 23:59:24,169 INFO L78 Accepts]: Start accepts. Automaton has 143404 states and 638584 transitions. Word has length 4 [2020-10-05 23:59:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:59:24,169 INFO L479 AbstractCegarLoop]: Abstraction has 143404 states and 638584 transitions. [2020-10-05 23:59:24,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:59:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 143404 states and 638584 transitions. [2020-10-05 23:59:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:59:24,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:59:24,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:59:24,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-05 23:59:24,170 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:59:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:59:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 288657511, now seen corresponding path program 1 times [2020-10-05 23:59:24,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:59:24,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697461486] [2020-10-05 23:59:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:59:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:59:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:59:24,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697461486] [2020-10-05 23:59:24,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:59:24,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:59:24,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1338734153] [2020-10-05 23:59:24,196 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:59:24,197 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:59:24,198 INFO L258 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-10-05 23:59:24,198 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:59:24,198 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-05 23:59:24,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:59:24,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:59:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:59:24,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:59:24,199 INFO L87 Difference]: Start difference. First operand 143404 states and 638584 transitions. Second operand 4 states. [2020-10-05 23:59:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:59:33,268 INFO L93 Difference]: Finished difference Result 166667 states and 731394 transitions. [2020-10-05 23:59:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:59:33,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-05 23:59:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:59:33,869 INFO L225 Difference]: With dead ends: 166667 [2020-10-05 23:59:33,869 INFO L226 Difference]: Without dead ends: 166667 [2020-10-05 23:59:33,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:59:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166667 states. [2020-10-05 23:59:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166667 to 162061. [2020-10-05 23:59:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162061 states. [2020-10-05 23:59:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162061 states to 162061 states and 710659 transitions. [2020-10-05 23:59:49,162 INFO L78 Accepts]: Start accepts. Automaton has 162061 states and 710659 transitions. Word has length 10 [2020-10-05 23:59:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:59:49,162 INFO L479 AbstractCegarLoop]: Abstraction has 162061 states and 710659 transitions. [2020-10-05 23:59:49,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:59:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 162061 states and 710659 transitions. [2020-10-05 23:59:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:59:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:59:49,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:59:49,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-05 23:59:49,163 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:59:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:59:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 941132211, now seen corresponding path program 1 times [2020-10-05 23:59:49,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:59:49,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354785337] [2020-10-05 23:59:49,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:59:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:59:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:59:49,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354785337] [2020-10-05 23:59:49,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480589264] [2020-10-05 23:59:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:59:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:59:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:59:49,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:59:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-05 23:59:49,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:59:49,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-05 23:59:49,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1711182693] [2020-10-05 23:59:49,316 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-05 23:59:49,318 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-05 23:59:49,321 INFO L258 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-10-05 23:59:49,321 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-05 23:59:49,334 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1267063#(<= (+ ULTIMATE.start_main_~tid~0 16) ~SIGMA~0)] [2020-10-05 23:59:49,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:59:49,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:59:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:59:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:59:49,335 INFO L87 Difference]: Start difference. First operand 162061 states and 710659 transitions. Second operand 5 states. [2020-10-05 23:59:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:59:50,397 INFO L93 Difference]: Finished difference Result 162059 states and 710654 transitions. [2020-10-05 23:59:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:59:50,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-05 23:59:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:59:58,110 INFO L225 Difference]: With dead ends: 162059 [2020-10-05 23:59:58,110 INFO L226 Difference]: Without dead ends: 162059 [2020-10-05 23:59:58,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-06 00:00:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162059 states. [2020-10-06 00:00:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162059 to 162059. [2020-10-06 00:00:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162059 states. [2020-10-06 00:00:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162059 states to 162059 states and 710654 transitions. [2020-10-06 00:00:06,404 INFO L78 Accepts]: Start accepts. Automaton has 162059 states and 710654 transitions. Word has length 17 [2020-10-06 00:00:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-06 00:00:06,404 INFO L479 AbstractCegarLoop]: Abstraction has 162059 states and 710654 transitions. [2020-10-06 00:00:06,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-06 00:00:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 162059 states and 710654 transitions. [2020-10-06 00:00:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-06 00:00:06,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-06 00:00:06,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-06 00:00:06,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-06 00:00:06,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-06 00:00:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-06 00:00:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash -220199302, now seen corresponding path program 1 times [2020-10-06 00:00:06,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-06 00:00:06,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045122344] [2020-10-06 00:00:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-06 00:00:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:00:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-06 00:00:06,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045122344] [2020-10-06 00:00:06,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440553776] [2020-10-06 00:00:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:00:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-06 00:00:06,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-06 00:00:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-06 00:00:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-06 00:00:06,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-06 00:00:06,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-06 00:00:06,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [913452980] [2020-10-06 00:00:06,773 INFO L200 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-06 00:00:06,776 INFO L255 McrAutomatonBuilder]: Started intersection. [2020-10-06 00:00:06,781 INFO L258 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-10-06 00:00:06,781 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-06 00:00:06,795 INFO L313 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1753315#(<= (+ ULTIMATE.start_main_~tid~0 16) ~SIGMA~0)] [2020-10-06 00:00:06,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-06 00:00:06,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-06 00:00:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-06 00:00:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-06 00:00:06,796 INFO L87 Difference]: Start difference. First operand 162059 states and 710654 transitions. Second operand 6 states. Received shutdown request... [2020-10-06 00:00:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-06 00:00:12,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-06 00:00:12,920 WARN L544 AbstractCegarLoop]: Verification canceled [2020-10-06 00:00:12,926 WARN L228 ceAbstractionStarter]: Timeout [2020-10-06 00:00:12,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.10 12:00:12 BasicIcfg [2020-10-06 00:00:12,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-06 00:00:12,928 INFO L168 Benchmark]: Toolchain (without parser) took 208494.81 ms. Allocated memory was 146.8 MB in the beginning and 3.9 GB in the end (delta: 3.8 GB). Free memory was 100.5 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,928 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1126.87 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 123.9 MB in the end (delta: -23.9 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.64 ms. Allocated memory is still 205.0 MB. Free memory was 123.9 MB in the beginning and 121.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,929 INFO L168 Benchmark]: Boogie Preprocessor took 41.02 ms. Allocated memory is still 205.0 MB. Free memory was 121.2 MB in the beginning and 119.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,929 INFO L168 Benchmark]: RCFGBuilder took 515.79 ms. Allocated memory is still 205.0 MB. Free memory was 119.8 MB in the beginning and 93.9 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,930 INFO L168 Benchmark]: TraceAbstraction took 206742.76 ms. Allocated memory was 205.0 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 93.2 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2020-10-06 00:00:12,931 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1126.87 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 123.9 MB in the end (delta: -23.9 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.64 ms. Allocated memory is still 205.0 MB. Free memory was 123.9 MB in the beginning and 121.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.02 ms. Allocated memory is still 205.0 MB. Free memory was 121.2 MB in the beginning and 119.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 515.79 ms. Allocated memory is still 205.0 MB. Free memory was 119.8 MB in the beginning and 93.9 MB in the end (delta: 26.0 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206742.76 ms. Allocated memory was 205.0 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 93.2 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.0s, 79 ProgramPointsBefore, 18 ProgramPointsAfterwards, 84 TransitionsBefore, 17 TransitionsAfterwards, 344 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 163 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 293 CheckedPairsTotal, 77 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.1s, 86 ProgramPointsBefore, 24 ProgramPointsAfterwards, 90 TransitionsBefore, 22 TransitionsAfterwards, 824 CoEnabledTransitionPairs, 8 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 391 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 676 CheckedPairsTotal, 79 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.2s, 93 ProgramPointsBefore, 28 ProgramPointsAfterwards, 96 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 29 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 618 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1092 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.3s, 100 ProgramPointsBefore, 32 ProgramPointsAfterwards, 102 TransitionsBefore, 28 TransitionsAfterwards, 1872 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 903 VarBasedMoverChecksPositive, 26 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1730 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.3s, 107 ProgramPointsBefore, 36 ProgramPointsAfterwards, 108 TransitionsBefore, 31 TransitionsAfterwards, 2480 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1168 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1953 CheckedPairsTotal, 87 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.6s, 114 ProgramPointsBefore, 40 ProgramPointsAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 3144 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1453 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2432 CheckedPairsTotal, 90 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.6s, 121 ProgramPointsBefore, 44 ProgramPointsAfterwards, 120 TransitionsBefore, 37 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 1791 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3124 CheckedPairsTotal, 95 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 4.8s, 128 ProgramPointsBefore, 48 ProgramPointsAfterwards, 126 TransitionsBefore, 40 TransitionsAfterwards, 4640 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 2195 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3851 CheckedPairsTotal, 98 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 8.3s, 135 ProgramPointsBefore, 52 ProgramPointsAfterwards, 132 TransitionsBefore, 43 TransitionsAfterwards, 5472 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 2521 VarBasedMoverChecksPositive, 29 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 4378 CheckedPairsTotal, 98 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while BasicCegarLoop was constructing difference of abstraction (162059states) and FLOYD_HOARE automaton (currently 5 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (66413 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 9 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 206.3s, OverallIterations: 56, TraceHistogramMax: 9, AutomataDifference: 37.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 81.5s, HoareTripleCheckerStatistics: 1382 SDtfs, 1597 SDslu, 2081 SDs, 0 SdLazy, 1244 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1082 GetRequests, 798 SyntacticMatches, 21 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163089occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 72.2s AutomataMinimizationTime, 47 MinimizatonAttempts, 8176 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 2084 NumberOfCodeBlocks, 2084 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1751 ConstructedInterpolants, 0 QuantifiedInterpolants, 254069 SizeOfPredicates, 30 NumberOfNonLiveVariables, 4321 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 78 InterpolantComputations, 18 PerfectInterpolantSequences, 129/1827 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown