/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.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:37:15,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:37:15,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:37:15,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:37:15,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:37:15,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:37:15,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:37:15,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:37:15,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:37:15,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:37:15,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:37:15,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:37:15,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:37:15,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:37:15,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:37:15,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:37:15,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:37:15,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:37:15,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:37:15,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:37:15,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:37:15,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:37:15,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:37:15,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:37:15,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:37:15,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:37:15,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:37:15,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:37:15,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:37:15,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:37:15,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:37:15,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:37:15,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:37:15,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:37:15,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:37:15,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:37:15,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:37:15,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:37:15,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:37:15,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:37:15,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:37:15,770 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:37:15,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:37:15,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:37:15,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:37:15,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:37:15,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:37:15,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:37:15,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:37:15,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:37:15,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:37:15,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:37:15,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:37:15,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:37:15,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:37:15,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:37:15,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:37:15,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:37:15,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:37:15,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:37:15,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:37:16,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:37:16,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:37:16,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:37:16,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:37:16,087 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:37:16,087 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-10-16 11:37:16,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ee53bd67/b454fbada2274c3abd705bfa25152ade/FLAG09f17d60c [2020-10-16 11:37:16,765 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:37:16,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/sigma.i [2020-10-16 11:37:16,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ee53bd67/b454fbada2274c3abd705bfa25152ade/FLAG09f17d60c [2020-10-16 11:37:17,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0ee53bd67/b454fbada2274c3abd705bfa25152ade [2020-10-16 11:37:17,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:37:17,077 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:37:17,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:17,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:37:17,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:37:17,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:17" (1/1) ... [2020-10-16 11:37:17,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2a71f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:17, skipping insertion in model container [2020-10-16 11:37:17,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:37:17" (1/1) ... [2020-10-16 11:37:17,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:37:17,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:37:17,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:17,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:37:17,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:37:18,065 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:37:18,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18 WrapperNode [2020-10-16 11:37:18,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:37:18,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:18,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:37:18,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:37:18,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:37:18,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:37:18,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:37:18,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:37:18,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... [2020-10-16 11:37:18,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:37:18,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:37:18,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:37:18,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:37:18,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:37:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-16 11:37:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:37:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 11:37:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:37:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-16 11:37:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-16 11:37:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-10-16 11:37:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-10-16 11:37:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:37:18,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:37:18,227 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:37:18,628 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:37:18,628 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-16 11:37:18,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:18 BoogieIcfgContainer [2020-10-16 11:37:18,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:37:18,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:37:18,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:37:18,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:37:18,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:37:17" (1/3) ... [2020-10-16 11:37:18,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30327112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:18, skipping insertion in model container [2020-10-16 11:37:18,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:37:18" (2/3) ... [2020-10-16 11:37:18,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30327112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:37:18, skipping insertion in model container [2020-10-16 11:37:18,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:37:18" (3/3) ... [2020-10-16 11:37:18,640 INFO L111 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-10-16 11:37:18,663 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:37:18,664 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:37:18,670 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:37:18,671 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:37:18,699 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,699 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,699 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,700 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,700 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,700 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,706 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,707 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,707 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:18,715 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 11:37:18,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:18,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:18,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:18,750 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:18,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:18,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:18,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:18,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:18,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:18,763 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:18,764 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-16 11:37:18,767 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 84 transitions, 176 flow [2020-10-16 11:37:18,769 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-10-16 11:37:18,830 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-10-16 11:37:18,831 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 11:37:18,835 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. [2020-10-16 11:37:18,838 INFO L117 LiptonReduction]: Number of co-enabled transitions 344 [2020-10-16 11:37:20,319 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-16 11:37:20,693 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-10-16 11:37:20,798 INFO L132 LiptonReduction]: Checked pairs total: 432 [2020-10-16 11:37:20,798 INFO L134 LiptonReduction]: Total number of compositions: 83 [2020-10-16 11:37:20,804 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-10-16 11:37:20,814 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-10-16 11:37:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-16 11:37:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:20,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:20,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:20,823 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-10-16 11:37:20,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:20,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145893524] [2020-10-16 11:37:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:21,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145893524] [2020-10-16 11:37:21,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062887253] [2020-10-16 11:37:21,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:21,056 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-16 11:37:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,105 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-10-16 11:37:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:21,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,118 INFO L225 Difference]: With dead ends: 36 [2020-10-16 11:37:21,118 INFO L226 Difference]: Without dead ends: 31 [2020-10-16 11:37:21,120 INFO L677 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 [2020-10-16 11:37:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-16 11:37:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-16 11:37:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 11:37:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-10-16 11:37:21,158 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-10-16 11:37:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,158 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-10-16 11:37:21,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-10-16 11:37:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:37:21,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:21,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:37:21,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-10-16 11:37:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879321793] [2020-10-16 11:37:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:21,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879321793] [2020-10-16 11:37:21,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:21,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:21,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966523564] [2020-10-16 11:37:21,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:21,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:21,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:21,264 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-10-16 11:37:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:21,294 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-10-16 11:37:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:21,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-16 11:37:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:21,295 INFO L225 Difference]: With dead ends: 28 [2020-10-16 11:37:21,295 INFO L226 Difference]: Without dead ends: 28 [2020-10-16 11:37:21,296 INFO L677 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 [2020-10-16 11:37:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-16 11:37:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-16 11:37:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-16 11:37:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-16 11:37:21,301 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-10-16 11:37:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:21,301 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-16 11:37:21,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-16 11:37:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:21,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:21,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-10-16 11:37:21,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:37:21,303 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-10-16 11:37:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:21,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162184260] [2020-10-16 11:37:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:21,344 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:21,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:21,426 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:21,426 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:21,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:37:21,428 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:21,430 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:21,430 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 11:37:21,437 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,437 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,437 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,438 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,438 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,438 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,438 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,438 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,439 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,439 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,439 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,439 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,440 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,440 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,440 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,441 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,442 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,443 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,443 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,443 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:21,448 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2020-10-16 11:37:21,448 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:21,449 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:21,449 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:21,449 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:21,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:21,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:21,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:21,450 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:21,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:21,452 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:21,452 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-16 11:37:21,453 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 198 flow [2020-10-16 11:37:21,453 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-10-16 11:37:21,498 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-10-16 11:37:21,499 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 11:37:21,500 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. [2020-10-16 11:37:21,503 INFO L117 LiptonReduction]: Number of co-enabled transitions 824 [2020-10-16 11:37:22,882 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 11:37:23,164 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 11:37:23,462 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-16 11:37:23,587 INFO L132 LiptonReduction]: Checked pairs total: 1197 [2020-10-16 11:37:23,587 INFO L134 LiptonReduction]: Total number of compositions: 85 [2020-10-16 11:37:23,587 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-10-16 11:37:23,593 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-10-16 11:37:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-10-16 11:37:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:23,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:23,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-10-16 11:37:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445255676] [2020-10-16 11:37:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445255676] [2020-10-16 11:37:23,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:23,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:23,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447568277] [2020-10-16 11:37:23,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:23,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:23,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:23,633 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-10-16 11:37:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,662 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-10-16 11:37:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:23,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,666 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:37:23,666 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:37:23,667 INFO L677 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 [2020-10-16 11:37:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:37:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-16 11:37:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-16 11:37:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-10-16 11:37:23,681 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-10-16 11:37:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,681 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-10-16 11:37:23,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-10-16 11:37:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:23,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:37:23,683 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,683 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-10-16 11:37:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462205848] [2020-10-16 11:37:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:23,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462205848] [2020-10-16 11:37:23,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:23,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:23,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108479353] [2020-10-16 11:37:23,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:23,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:23,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:23,737 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-10-16 11:37:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,779 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-10-16 11:37:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:23,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:23,782 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:37:23,782 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:37:23,783 INFO L677 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 [2020-10-16 11:37:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:37:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-16 11:37:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-16 11:37:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-10-16 11:37:23,793 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-10-16 11:37:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:23,793 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-10-16 11:37:23,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-10-16 11:37:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:23,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:23,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:23,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:37:23,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-10-16 11:37:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:23,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779712829] [2020-10-16 11:37:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779712829] [2020-10-16 11:37:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149052695] [2020-10-16 11:37:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:23,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:23,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:23,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245897429] [2020-10-16 11:37:23,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:23,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:23,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:23,962 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 6 states. [2020-10-16 11:37:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:23,999 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-10-16 11:37:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:24,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:24,001 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:37:24,001 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:37:24,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:37:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-16 11:37:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 11:37:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-10-16 11:37:24,011 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-10-16 11:37:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:24,011 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-10-16 11:37:24,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-10-16 11:37:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:24,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:24,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-10-16 11:37:24,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:37:24,227 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:24,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-10-16 11:37:24,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:24,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146102173] [2020-10-16 11:37:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:24,271 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:24,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:24,308 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:24,309 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:24,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 11:37:24,309 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:24,310 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:24,311 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 11:37:24,317 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,318 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,319 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,319 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,319 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,319 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,319 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,320 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,321 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,321 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,321 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,323 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,323 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,323 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,323 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,324 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,324 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,325 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,325 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:24,328 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2020-10-16 11:37:24,328 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:24,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:24,329 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:24,329 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:24,329 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:24,329 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:24,329 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:24,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:24,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:24,331 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:24,331 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-16 11:37:24,331 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 96 transitions, 222 flow [2020-10-16 11:37:24,332 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-10-16 11:37:24,389 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-10-16 11:37:24,389 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 11:37:24,390 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. [2020-10-16 11:37:24,395 INFO L117 LiptonReduction]: Number of co-enabled transitions 1320 [2020-10-16 11:37:26,107 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-16 11:37:26,382 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-16 11:37:26,494 INFO L132 LiptonReduction]: Checked pairs total: 2069 [2020-10-16 11:37:26,494 INFO L134 LiptonReduction]: Total number of compositions: 90 [2020-10-16 11:37:26,495 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-10-16 11:37:26,516 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-10-16 11:37:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-10-16 11:37:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:26,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:26,517 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-10-16 11:37:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214041137] [2020-10-16 11:37:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:26,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214041137] [2020-10-16 11:37:26,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:26,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712134741] [2020-10-16 11:37:26,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:26,539 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-10-16 11:37:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,564 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-10-16 11:37:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:26,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,568 INFO L225 Difference]: With dead ends: 297 [2020-10-16 11:37:26,568 INFO L226 Difference]: Without dead ends: 268 [2020-10-16 11:37:26,568 INFO L677 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 [2020-10-16 11:37:26,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-16 11:37:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-16 11:37:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-16 11:37:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-10-16 11:37:26,592 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-10-16 11:37:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,592 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-10-16 11:37:26,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-10-16 11:37:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 11:37:26,593 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-10-16 11:37:26,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711014308] [2020-10-16 11:37:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:26,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711014308] [2020-10-16 11:37:26,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:26,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:26,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213002332] [2020-10-16 11:37:26,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:26,665 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-10-16 11:37:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,711 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-10-16 11:37:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:26,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:26,717 INFO L225 Difference]: With dead ends: 299 [2020-10-16 11:37:26,718 INFO L226 Difference]: Without dead ends: 299 [2020-10-16 11:37:26,718 INFO L677 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 [2020-10-16 11:37:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-16 11:37:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-10-16 11:37:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-16 11:37:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-10-16 11:37:26,760 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-10-16 11:37:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:26,760 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-10-16 11:37:26,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-10-16 11:37:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:26,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:26,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:26,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 11:37:26,767 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:26,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-10-16 11:37:26,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:26,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105781781] [2020-10-16 11:37:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105781781] [2020-10-16 11:37:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708580119] [2020-10-16 11:37:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:26,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:26,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:26,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:26,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896002503] [2020-10-16 11:37:26,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:26,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:26,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:26,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:26,958 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 6 states. [2020-10-16 11:37:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:26,998 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-10-16 11:37:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:26,998 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:26,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,000 INFO L225 Difference]: With dead ends: 275 [2020-10-16 11:37:27,000 INFO L226 Difference]: Without dead ends: 275 [2020-10-16 11:37:27,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-16 11:37:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-10-16 11:37:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-16 11:37:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-10-16 11:37:27,012 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-10-16 11:37:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,012 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-10-16 11:37:27,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-10-16 11:37:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:27,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,014 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:37:27,228 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-10-16 11:37:27,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595686869] [2020-10-16 11:37:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:27,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595686869] [2020-10-16 11:37:27,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567768866] [2020-10-16 11:37:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:37:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:27,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:27,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:27,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429983643] [2020-10-16 11:37:27,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:27,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:27,469 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 8 states. [2020-10-16 11:37:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:27,515 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-10-16 11:37:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:27,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:37:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:27,518 INFO L225 Difference]: With dead ends: 271 [2020-10-16 11:37:27,518 INFO L226 Difference]: Without dead ends: 271 [2020-10-16 11:37:27,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-16 11:37:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-10-16 11:37:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-16 11:37:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-10-16 11:37:27,529 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-10-16 11:37:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:27,530 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-10-16 11:37:27,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:37:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-10-16 11:37:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:27,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:27,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 11:37:27,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 11:37:27,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-10-16 11:37:27,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:27,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183950557] [2020-10-16 11:37:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:27,772 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:27,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:27,799 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:27,799 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:27,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 11:37:27,800 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:27,800 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:27,800 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 11:37:27,808 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,808 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,808 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,809 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,810 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,811 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,812 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,812 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,812 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,812 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,812 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,813 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,814 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,814 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,814 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,814 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,816 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,816 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,816 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,816 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,817 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,818 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,818 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,818 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:27,822 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 11:37:27,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:27,822 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:27,822 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:27,822 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:27,822 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:27,823 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:27,823 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:27,823 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:27,823 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:27,824 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:27,824 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-16 11:37:27,825 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 102 transitions, 248 flow [2020-10-16 11:37:27,825 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-10-16 11:37:27,897 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-10-16 11:37:27,898 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 11:37:27,900 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. [2020-10-16 11:37:27,909 INFO L117 LiptonReduction]: Number of co-enabled transitions 1872 [2020-10-16 11:37:29,570 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-10-16 11:37:29,883 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-16 11:37:29,997 INFO L132 LiptonReduction]: Checked pairs total: 3489 [2020-10-16 11:37:29,997 INFO L134 LiptonReduction]: Total number of compositions: 90 [2020-10-16 11:37:29,998 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-10-16 11:37:30,025 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-10-16 11:37:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-10-16 11:37:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:30,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:30,026 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-10-16 11:37:30,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015754039] [2020-10-16 11:37:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:30,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015754039] [2020-10-16 11:37:30,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:30,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:30,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114130208] [2020-10-16 11:37:30,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:30,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:30,054 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-10-16 11:37:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,090 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-10-16 11:37:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:30,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,097 INFO L225 Difference]: With dead ends: 817 [2020-10-16 11:37:30,098 INFO L226 Difference]: Without dead ends: 734 [2020-10-16 11:37:30,098 INFO L677 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 [2020-10-16 11:37:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-10-16 11:37:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-16 11:37:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-16 11:37:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-10-16 11:37:30,134 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-10-16 11:37:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,134 INFO L481 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-10-16 11:37:30,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-10-16 11:37:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:30,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 11:37:30,136 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-10-16 11:37:30,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667801218] [2020-10-16 11:37:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667801218] [2020-10-16 11:37:30,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:30,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650330457] [2020-10-16 11:37:30,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:30,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:30,178 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-10-16 11:37:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,215 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-10-16 11:37:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:30,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,222 INFO L225 Difference]: With dead ends: 843 [2020-10-16 11:37:30,222 INFO L226 Difference]: Without dead ends: 843 [2020-10-16 11:37:30,223 INFO L677 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 [2020-10-16 11:37:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-10-16 11:37:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-10-16 11:37:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-10-16 11:37:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-10-16 11:37:30,277 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-10-16 11:37:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,278 INFO L481 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-10-16 11:37:30,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-10-16 11:37:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:30,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 11:37:30,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-10-16 11:37:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131129550] [2020-10-16 11:37:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131129550] [2020-10-16 11:37:30,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749786950] [2020-10-16 11:37:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495609136] [2020-10-16 11:37:30,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:30,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:30,432 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 6 states. [2020-10-16 11:37:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,474 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-10-16 11:37:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:30,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,480 INFO L225 Difference]: With dead ends: 779 [2020-10-16 11:37:30,480 INFO L226 Difference]: Without dead ends: 779 [2020-10-16 11:37:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-10-16 11:37:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-10-16 11:37:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-10-16 11:37:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-10-16 11:37:30,503 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-10-16 11:37:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,503 INFO L481 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-10-16 11:37:30,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-10-16 11:37:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:30,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:30,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:30,720 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-10-16 11:37:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:30,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295444463] [2020-10-16 11:37:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:30,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295444463] [2020-10-16 11:37:30,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842163643] [2020-10-16 11:37:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:30,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:37:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:30,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:30,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:30,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757547155] [2020-10-16 11:37:30,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:30,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:30,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:30,872 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 8 states. [2020-10-16 11:37:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:30,930 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-10-16 11:37:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:30,930 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:37:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:30,936 INFO L225 Difference]: With dead ends: 775 [2020-10-16 11:37:30,936 INFO L226 Difference]: Without dead ends: 775 [2020-10-16 11:37:30,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-16 11:37:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-10-16 11:37:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-10-16 11:37:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-10-16 11:37:30,959 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-10-16 11:37:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:30,960 INFO L481 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-10-16 11:37:30,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:37:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-10-16 11:37:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:37:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:30,962 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:37:31,177 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-10-16 11:37:31,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828616991] [2020-10-16 11:37:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:31,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828616991] [2020-10-16 11:37:31,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019640274] [2020-10-16 11:37:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:37:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:31,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:31,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:31,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770353235] [2020-10-16 11:37:31,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:31,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:31,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:31,379 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 10 states. [2020-10-16 11:37:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:31,455 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-10-16 11:37:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:31,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-16 11:37:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:31,460 INFO L225 Difference]: With dead ends: 767 [2020-10-16 11:37:31,460 INFO L226 Difference]: Without dead ends: 767 [2020-10-16 11:37:31,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-10-16 11:37:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-10-16 11:37:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-16 11:37:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-10-16 11:37:31,484 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-10-16 11:37:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:31,485 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-10-16 11:37:31,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-10-16 11:37:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:37:31,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:31,486 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:31,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:37:31,699 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-10-16 11:37:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:31,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729923390] [2020-10-16 11:37:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:31,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:31,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:31,774 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:31,775 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:31,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 11:37:31,775 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:31,775 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:31,778 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:31,778 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 11:37:31,788 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,789 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,790 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,791 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,792 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,793 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,793 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,794 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,795 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,795 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,795 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,797 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,797 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,797 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,797 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,798 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,799 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,799 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,799 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,800 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,800 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,800 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,800 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:31,804 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2020-10-16 11:37:31,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:31,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:31,805 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:31,805 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:31,805 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:31,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:31,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:31,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:31,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:31,807 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:31,807 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-16 11:37:31,807 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 276 flow [2020-10-16 11:37:31,807 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-10-16 11:37:31,980 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-10-16 11:37:31,980 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 11:37:31,985 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. [2020-10-16 11:37:32,015 INFO L117 LiptonReduction]: Number of co-enabled transitions 2480 [2020-10-16 11:37:33,560 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-16 11:37:33,867 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-10-16 11:37:33,970 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-16 11:37:33,979 INFO L132 LiptonReduction]: Checked pairs total: 4239 [2020-10-16 11:37:33,979 INFO L134 LiptonReduction]: Total number of compositions: 93 [2020-10-16 11:37:33,979 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-10-16 11:37:34,082 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-10-16 11:37:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-10-16 11:37:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:34,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:34,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-10-16 11:37:34,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443082487] [2020-10-16 11:37:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:34,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443082487] [2020-10-16 11:37:34,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:34,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:34,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243213880] [2020-10-16 11:37:34,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:34,104 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-10-16 11:37:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,155 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-10-16 11:37:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:34,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,175 INFO L225 Difference]: With dead ends: 2289 [2020-10-16 11:37:34,175 INFO L226 Difference]: Without dead ends: 2044 [2020-10-16 11:37:34,178 INFO L677 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 [2020-10-16 11:37:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-10-16 11:37:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-10-16 11:37:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-10-16 11:37:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-10-16 11:37:34,256 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-10-16 11:37:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,256 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-10-16 11:37:34,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-10-16 11:37:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:34,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 11:37:34,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-10-16 11:37:34,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723133626] [2020-10-16 11:37:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723133626] [2020-10-16 11:37:34,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:34,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:34,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048879162] [2020-10-16 11:37:34,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:34,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:34,294 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-10-16 11:37:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,337 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-10-16 11:37:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:34,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,354 INFO L225 Difference]: With dead ends: 2379 [2020-10-16 11:37:34,354 INFO L226 Difference]: Without dead ends: 2379 [2020-10-16 11:37:34,355 INFO L677 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 [2020-10-16 11:37:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-10-16 11:37:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-10-16 11:37:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-10-16 11:37:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-10-16 11:37:34,431 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-10-16 11:37:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,431 INFO L481 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-10-16 11:37:34,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-10-16 11:37:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:34,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-16 11:37:34,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-10-16 11:37:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940205587] [2020-10-16 11:37:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:34,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940205587] [2020-10-16 11:37:34,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130697602] [2020-10-16 11:37:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:34,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291594079] [2020-10-16 11:37:34,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:34,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:34,598 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 6 states. [2020-10-16 11:37:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:34,643 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-10-16 11:37:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:34,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:34,661 INFO L225 Difference]: With dead ends: 2219 [2020-10-16 11:37:34,662 INFO L226 Difference]: Without dead ends: 2219 [2020-10-16 11:37:34,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-10-16 11:37:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-10-16 11:37:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-10-16 11:37:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-10-16 11:37:34,732 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-10-16 11:37:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:34,733 INFO L481 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-10-16 11:37:34,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-10-16 11:37:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:34,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:34,734 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:34,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:34,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-10-16 11:37:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132261675] [2020-10-16 11:37:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:34,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132261675] [2020-10-16 11:37:34,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607837902] [2020-10-16 11:37:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:35,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:35,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972468581] [2020-10-16 11:37:35,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:35,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:35,125 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 8 states. [2020-10-16 11:37:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,178 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-10-16 11:37:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:35,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:37:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,277 INFO L225 Difference]: With dead ends: 2215 [2020-10-16 11:37:35,277 INFO L226 Difference]: Without dead ends: 2215 [2020-10-16 11:37:35,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-10-16 11:37:35,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-10-16 11:37:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-10-16 11:37:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-10-16 11:37:35,341 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-10-16 11:37:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,341 INFO L481 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-10-16 11:37:35,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:37:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-10-16 11:37:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:37:35,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:35,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:37:35,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-10-16 11:37:35,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:35,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243691511] [2020-10-16 11:37:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243691511] [2020-10-16 11:37:35,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308646034] [2020-10-16 11:37:35,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:35,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:37:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:35,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:35,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617599454] [2020-10-16 11:37:35,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:35,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:35,727 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 10 states. [2020-10-16 11:37:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:35,778 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-10-16 11:37:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:35,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-16 11:37:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:35,794 INFO L225 Difference]: With dead ends: 2207 [2020-10-16 11:37:35,794 INFO L226 Difference]: Without dead ends: 2207 [2020-10-16 11:37:35,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-10-16 11:37:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-10-16 11:37:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-10-16 11:37:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-10-16 11:37:35,877 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-10-16 11:37:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:35,878 INFO L481 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-10-16 11:37:35,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-10-16 11:37:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:37:35,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:35,880 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] [2020-10-16 11:37:36,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,094 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,095 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-10-16 11:37:36,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062022387] [2020-10-16 11:37:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062022387] [2020-10-16 11:37:36,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044980717] [2020-10-16 11:37:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:36,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:36,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621259314] [2020-10-16 11:37:36,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:36,301 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 12 states. [2020-10-16 11:37:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:36,381 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-10-16 11:37:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:36,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-16 11:37:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:36,390 INFO L225 Difference]: With dead ends: 2191 [2020-10-16 11:37:36,390 INFO L226 Difference]: Without dead ends: 2191 [2020-10-16 11:37:36,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-10-16 11:37:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-10-16 11:37:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-10-16 11:37:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-10-16 11:37:36,466 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-10-16 11:37:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:36,468 INFO L481 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-10-16 11:37:36,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-10-16 11:37:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:37:36,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:36,470 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:36,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:36,686 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-10-16 11:37:36,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:36,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311370670] [2020-10-16 11:37:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:36,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:36,731 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:36,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:36,741 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:36,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 11:37:36,741 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:36,741 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:36,742 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:36,742 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 11:37:36,751 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,751 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,751 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,752 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,753 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,754 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,754 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,754 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,754 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,754 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,755 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,756 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,757 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,757 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,757 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,757 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,757 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,758 WARN L313 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,759 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,759 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,759 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,759 WARN L313 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,761 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,761 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,761 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,761 WARN L313 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,762 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,762 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,762 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,763 WARN L313 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,764 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,764 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,764 WARN L313 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,764 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,766 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,766 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,766 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,766 WARN L313 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:36,770 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2020-10-16 11:37:36,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:36,771 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:36,771 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:36,771 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:36,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:36,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:36,771 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:36,772 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:36,772 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:36,773 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:36,773 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-16 11:37:36,773 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 114 transitions, 306 flow [2020-10-16 11:37:36,773 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-10-16 11:37:37,102 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-10-16 11:37:37,102 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 11:37:37,109 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. [2020-10-16 11:37:37,142 INFO L117 LiptonReduction]: Number of co-enabled transitions 3144 [2020-10-16 11:37:38,744 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-16 11:37:38,866 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-16 11:37:39,072 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-16 11:37:39,167 INFO L132 LiptonReduction]: Checked pairs total: 5960 [2020-10-16 11:37:39,168 INFO L134 LiptonReduction]: Total number of compositions: 96 [2020-10-16 11:37:39,168 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-10-16 11:37:39,481 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-10-16 11:37:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-10-16 11:37:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:39,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:39,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,483 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-10-16 11:37:39,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518933211] [2020-10-16 11:37:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:39,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518933211] [2020-10-16 11:37:39,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:39,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:39,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424208301] [2020-10-16 11:37:39,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:39,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:39,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:39,506 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-10-16 11:37:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,570 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-10-16 11:37:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:39,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,606 INFO L225 Difference]: With dead ends: 6529 [2020-10-16 11:37:39,607 INFO L226 Difference]: Without dead ends: 5798 [2020-10-16 11:37:39,607 INFO L677 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 [2020-10-16 11:37:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-10-16 11:37:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-10-16 11:37:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-10-16 11:37:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-10-16 11:37:39,820 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-10-16 11:37:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:39,820 INFO L481 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-10-16 11:37:39,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-10-16 11:37:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:39,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:39,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:39,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-16 11:37:39,821 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-10-16 11:37:39,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:39,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907130644] [2020-10-16 11:37:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:39,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907130644] [2020-10-16 11:37:39,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:39,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:39,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170335980] [2020-10-16 11:37:39,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:39,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:39,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:39,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:39,857 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-10-16 11:37:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:39,925 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-10-16 11:37:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:39,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:39,953 INFO L225 Difference]: With dead ends: 6779 [2020-10-16 11:37:39,953 INFO L226 Difference]: Without dead ends: 6779 [2020-10-16 11:37:39,954 INFO L677 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 [2020-10-16 11:37:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-10-16 11:37:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-10-16 11:37:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-10-16 11:37:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-10-16 11:37:40,297 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-10-16 11:37:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,297 INFO L481 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-10-16 11:37:40,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-10-16 11:37:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:40,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-16 11:37:40,298 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-10-16 11:37:40,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022192457] [2020-10-16 11:37:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:40,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022192457] [2020-10-16 11:37:40,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341890259] [2020-10-16 11:37:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:40,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:40,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913608085] [2020-10-16 11:37:40,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:40,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:40,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:40,414 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 6 states. [2020-10-16 11:37:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:40,486 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-10-16 11:37:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:40,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:40,513 INFO L225 Difference]: With dead ends: 6395 [2020-10-16 11:37:40,513 INFO L226 Difference]: Without dead ends: 6395 [2020-10-16 11:37:40,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-10-16 11:37:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-10-16 11:37:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-10-16 11:37:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-10-16 11:37:40,703 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-10-16 11:37:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:40,704 INFO L481 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-10-16 11:37:40,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-10-16 11:37:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:40,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:40,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:37:40,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-10-16 11:37:40,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:40,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724811615] [2020-10-16 11:37:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:40,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724811615] [2020-10-16 11:37:40,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314481910] [2020-10-16 11:37:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:37:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:41,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:41,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:41,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337931899] [2020-10-16 11:37:41,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:41,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:41,088 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 8 states. [2020-10-16 11:37:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:41,158 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-10-16 11:37:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:41,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:37:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:41,182 INFO L225 Difference]: With dead ends: 6391 [2020-10-16 11:37:41,182 INFO L226 Difference]: Without dead ends: 6391 [2020-10-16 11:37:41,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-10-16 11:37:41,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-10-16 11:37:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-10-16 11:37:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-10-16 11:37:41,980 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-10-16 11:37:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:41,981 INFO L481 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-10-16 11:37:41,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:37:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-10-16 11:37:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:37:41,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:41,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:42,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:37:42,196 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-10-16 11:37:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720528027] [2020-10-16 11:37:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:42,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720528027] [2020-10-16 11:37:42,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280561102] [2020-10-16 11:37:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:37:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435243522] [2020-10-16 11:37:42,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:42,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:42,388 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 10 states. [2020-10-16 11:37:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:42,508 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-10-16 11:37:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:42,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-16 11:37:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:42,540 INFO L225 Difference]: With dead ends: 6383 [2020-10-16 11:37:42,541 INFO L226 Difference]: Without dead ends: 6383 [2020-10-16 11:37:42,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-10-16 11:37:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-10-16 11:37:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-10-16 11:37:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-10-16 11:37:42,779 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-10-16 11:37:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:42,781 INFO L481 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-10-16 11:37:42,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-10-16 11:37:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:37:42,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:42,784 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] [2020-10-16 11:37:42,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:42,997 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-10-16 11:37:42,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:42,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841612361] [2020-10-16 11:37:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841612361] [2020-10-16 11:37:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610158390] [2020-10-16 11:37:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:43,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:43,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:43,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:43,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092005308] [2020-10-16 11:37:43,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:43,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:43,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:43,338 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 12 states. [2020-10-16 11:37:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:43,454 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-10-16 11:37:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:43,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-16 11:37:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:43,488 INFO L225 Difference]: With dead ends: 6367 [2020-10-16 11:37:43,489 INFO L226 Difference]: Without dead ends: 6367 [2020-10-16 11:37:43,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-10-16 11:37:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-10-16 11:37:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-10-16 11:37:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-10-16 11:37:43,738 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-10-16 11:37:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:43,738 INFO L481 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-10-16 11:37:43,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-10-16 11:37:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 11:37:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:43,745 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] [2020-10-16 11:37:43,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:43,959 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-10-16 11:37:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:43,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934634069] [2020-10-16 11:37:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934634069] [2020-10-16 11:37:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943993757] [2020-10-16 11:37:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:44,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:44,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:44,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:44,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171463702] [2020-10-16 11:37:44,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:44,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:44,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:44,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:44,395 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 14 states. [2020-10-16 11:37:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:44,493 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-10-16 11:37:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:44,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-16 11:37:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:44,518 INFO L225 Difference]: With dead ends: 6335 [2020-10-16 11:37:44,518 INFO L226 Difference]: Without dead ends: 6335 [2020-10-16 11:37:44,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-10-16 11:37:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-10-16 11:37:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-10-16 11:37:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-10-16 11:37:44,703 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-10-16 11:37:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:44,704 INFO L481 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-10-16 11:37:44,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-10-16 11:37:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 11:37:44,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:44,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:44,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:37:44,922 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:44,922 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-10-16 11:37:44,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:44,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146713358] [2020-10-16 11:37:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:44,951 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:44,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:44,983 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:44,984 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:44,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-16 11:37:44,984 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:44,985 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:44,985 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 11:37:44,994 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,994 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,994 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,994 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,994 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,995 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,996 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,997 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,998 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:44,999 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,000 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,000 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,000 WARN L313 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,001 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,002 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,002 WARN L313 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,002 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,003 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,004 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,004 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,004 WARN L313 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,005 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,005 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,006 WARN L313 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,006 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,007 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,007 WARN L313 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,007 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,008 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,009 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,009 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,009 WARN L313 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,010 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,010 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,011 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,011 WARN L313 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:45,016 INFO L149 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2020-10-16 11:37:45,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:45,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:45,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:45,017 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:45,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:45,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:45,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:45,018 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:45,018 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:45,019 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:45,019 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-16 11:37:45,019 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 120 transitions, 338 flow [2020-10-16 11:37:45,019 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-10-16 11:37:45,741 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-10-16 11:37:45,742 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 11:37:45,771 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. [2020-10-16 11:37:45,935 INFO L117 LiptonReduction]: Number of co-enabled transitions 3864 [2020-10-16 11:37:47,607 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 11:37:48,018 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-16 11:37:48,119 INFO L132 LiptonReduction]: Checked pairs total: 7691 [2020-10-16 11:37:48,119 INFO L134 LiptonReduction]: Total number of compositions: 101 [2020-10-16 11:37:48,120 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-10-16 11:37:49,293 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-10-16 11:37:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-10-16 11:37:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:37:49,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:49,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:37:49,294 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-10-16 11:37:49,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:49,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495873524] [2020-10-16 11:37:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:37:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495873524] [2020-10-16 11:37:49,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:49,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:37:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129683935] [2020-10-16 11:37:49,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:37:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:37:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:37:49,315 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-10-16 11:37:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:49,456 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-10-16 11:37:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:37:49,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:37:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:49,524 INFO L225 Difference]: With dead ends: 18897 [2020-10-16 11:37:49,525 INFO L226 Difference]: Without dead ends: 16708 [2020-10-16 11:37:49,525 INFO L677 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 [2020-10-16 11:37:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-10-16 11:37:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-10-16 11:37:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-10-16 11:37:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-10-16 11:37:50,388 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-10-16 11:37:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:50,389 INFO L481 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-10-16 11:37:50,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:37:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-10-16 11:37:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:37:50,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:50,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:50,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-16 11:37:50,390 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-10-16 11:37:50,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:50,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322053798] [2020-10-16 11:37:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:37:50,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322053798] [2020-10-16 11:37:50,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:37:50,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:37:50,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201368290] [2020-10-16 11:37:50,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:37:50,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:50,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:37:50,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:37:50,420 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-10-16 11:37:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:50,541 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-10-16 11:37:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:50,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:37:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:50,583 INFO L225 Difference]: With dead ends: 19531 [2020-10-16 11:37:50,583 INFO L226 Difference]: Without dead ends: 19531 [2020-10-16 11:37:50,583 INFO L677 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 [2020-10-16 11:37:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-10-16 11:37:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-10-16 11:37:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-10-16 11:37:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-10-16 11:37:51,156 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-10-16 11:37:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:51,156 INFO L481 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-10-16 11:37:51,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:37:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-10-16 11:37:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:37:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:51,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:51,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-16 11:37:51,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-10-16 11:37:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4304142] [2020-10-16 11:37:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4304142] [2020-10-16 11:37:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531436586] [2020-10-16 11:37:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:37:51,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:51,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:51,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:37:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459216757] [2020-10-16 11:37:51,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:37:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:37:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:51,294 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 6 states. [2020-10-16 11:37:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:52,383 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-10-16 11:37:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:37:52,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:37:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:52,428 INFO L225 Difference]: With dead ends: 18635 [2020-10-16 11:37:52,428 INFO L226 Difference]: Without dead ends: 18635 [2020-10-16 11:37:52,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:37:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-10-16 11:37:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-10-16 11:37:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-10-16 11:37:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-10-16 11:37:52,875 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-10-16 11:37:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:52,876 INFO L481 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-10-16 11:37:52,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:37:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-10-16 11:37:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:37:52,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:52,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:53,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:53,092 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:53,092 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-10-16 11:37:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:53,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508739668] [2020-10-16 11:37:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:53,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508739668] [2020-10-16 11:37:53,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502130775] [2020-10-16 11:37:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:37:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:53,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:53,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:37:53,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518829894] [2020-10-16 11:37:53,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:37:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:37:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:53,273 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 8 states. [2020-10-16 11:37:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:53,459 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-10-16 11:37:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:37:53,460 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:37:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:53,531 INFO L225 Difference]: With dead ends: 18631 [2020-10-16 11:37:53,532 INFO L226 Difference]: Without dead ends: 18631 [2020-10-16 11:37:53,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:37:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-10-16 11:37:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-10-16 11:37:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-10-16 11:37:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-10-16 11:37:54,353 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-10-16 11:37:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:54,354 INFO L481 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-10-16 11:37:54,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:37:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-10-16 11:37:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:37:54,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:54,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:54,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:37:54,571 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:54,571 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-10-16 11:37:54,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:54,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275150762] [2020-10-16 11:37:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:54,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275150762] [2020-10-16 11:37:54,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248845311] [2020-10-16 11:37:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:37:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:54,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:54,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:37:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813364384] [2020-10-16 11:37:54,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:37:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:37:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:54,744 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 10 states. [2020-10-16 11:37:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:54,879 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-10-16 11:37:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:37:54,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-16 11:37:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:54,920 INFO L225 Difference]: With dead ends: 18623 [2020-10-16 11:37:54,921 INFO L226 Difference]: Without dead ends: 18623 [2020-10-16 11:37:54,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:37:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-10-16 11:37:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-10-16 11:37:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-10-16 11:37:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-10-16 11:37:55,329 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-10-16 11:37:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:55,329 INFO L481 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-10-16 11:37:55,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:37:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-10-16 11:37:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:37:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:55,331 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] [2020-10-16 11:37:55,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:37:55,542 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-10-16 11:37:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:55,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819518851] [2020-10-16 11:37:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:55,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819518851] [2020-10-16 11:37:55,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593692238] [2020-10-16 11:37:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:55,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:37:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:55,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:55,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:37:55,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588929046] [2020-10-16 11:37:55,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:37:55,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:37:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:55,758 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 12 states. [2020-10-16 11:37:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:56,072 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-10-16 11:37:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:37:56,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-16 11:37:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:56,121 INFO L225 Difference]: With dead ends: 18607 [2020-10-16 11:37:56,122 INFO L226 Difference]: Without dead ends: 18607 [2020-10-16 11:37:56,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:37:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-10-16 11:37:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-10-16 11:37:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-10-16 11:37:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-10-16 11:37:56,519 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-10-16 11:37:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:56,520 INFO L481 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-10-16 11:37:56,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:37:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-10-16 11:37:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-16 11:37:56,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:56,523 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] [2020-10-16 11:37:56,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:37:56,737 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-10-16 11:37:56,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:56,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560784147] [2020-10-16 11:37:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:56,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560784147] [2020-10-16 11:37:56,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505365569] [2020-10-16 11:37:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:37:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:56,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:56,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-16 11:37:56,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734904] [2020-10-16 11:37:56,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:37:56,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:56,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:37:56,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:56,953 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 14 states. [2020-10-16 11:37:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:57,118 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-10-16 11:37:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:37:57,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-16 11:37:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:57,161 INFO L225 Difference]: With dead ends: 18575 [2020-10-16 11:37:57,161 INFO L226 Difference]: Without dead ends: 18575 [2020-10-16 11:37:57,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:37:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-10-16 11:37:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-10-16 11:37:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-10-16 11:37:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-10-16 11:37:57,812 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-10-16 11:37:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:57,813 INFO L481 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-10-16 11:37:57,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:37:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-10-16 11:37:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 11:37:57,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:57,819 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] [2020-10-16 11:37:58,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:37:58,029 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-10-16 11:37:58,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:58,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097753251] [2020-10-16 11:37:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:58,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097753251] [2020-10-16 11:37:58,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950316689] [2020-10-16 11:37:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:37:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:37:58,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:37:58,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:37:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:37:58,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:37:58,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 11:37:58,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668063824] [2020-10-16 11:37:58,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:37:58,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:37:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:37:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:58,296 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 16 states. [2020-10-16 11:37:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:37:58,426 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-10-16 11:37:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:37:58,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-16 11:37:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:37:58,464 INFO L225 Difference]: With dead ends: 18511 [2020-10-16 11:37:58,465 INFO L226 Difference]: Without dead ends: 18511 [2020-10-16 11:37:58,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:37:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-10-16 11:37:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-10-16 11:37:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-10-16 11:37:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-10-16 11:37:58,857 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-10-16 11:37:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:37:58,857 INFO L481 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-10-16 11:37:58,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:37:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-10-16 11:37:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-16 11:37:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:37:58,861 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:37:59,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:37:59,075 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:37:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:37:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-10-16 11:37:59,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:37:59,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636985239] [2020-10-16 11:37:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:37:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:59,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:37:59,121 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:37:59,132 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:37:59,132 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:37:59,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-16 11:37:59,132 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:37:59,133 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:37:59,133 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 11:37:59,143 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,144 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,144 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,144 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,146 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,146 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,146 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,147 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,148 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,149 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,150 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,151 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,152 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,152 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,152 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,152 WARN L313 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,158 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,159 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,159 WARN L313 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,159 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,160 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,160 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,160 WARN L313 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,160 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,161 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,161 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,162 WARN L313 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,162 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,163 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,163 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,163 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,163 WARN L313 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,164 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,164 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,164 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,164 WARN L313 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,165 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,166 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,166 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,166 WARN L313 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,167 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,167 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,167 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,167 WARN L313 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:37:59,173 INFO L149 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2020-10-16 11:37:59,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:37:59,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:37:59,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:37:59,174 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:37:59,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:37:59,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:37:59,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:37:59,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:37:59,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:37:59,175 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:37:59,175 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-16 11:37:59,175 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 126 transitions, 372 flow [2020-10-16 11:37:59,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-10-16 11:38:00,776 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-10-16 11:38:00,776 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 11:38:00,842 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. [2020-10-16 11:38:01,026 INFO L117 LiptonReduction]: Number of co-enabled transitions 4640 [2020-10-16 11:38:02,808 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-16 11:38:03,290 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-10-16 11:38:03,407 INFO L132 LiptonReduction]: Checked pairs total: 9733 [2020-10-16 11:38:03,407 INFO L134 LiptonReduction]: Total number of compositions: 104 [2020-10-16 11:38:03,407 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-10-16 11:38:10,458 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-10-16 11:38:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-10-16 11:38:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:38:10,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:10,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:38:10,459 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-10-16 11:38:10,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:10,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28891155] [2020-10-16 11:38:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:38:10,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28891155] [2020-10-16 11:38:10,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:38:10,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:38:10,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258021703] [2020-10-16 11:38:10,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:38:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:38:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:38:10,480 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-10-16 11:38:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:10,927 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-10-16 11:38:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:38:10,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:38:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:11,129 INFO L225 Difference]: With dead ends: 55297 [2020-10-16 11:38:11,129 INFO L226 Difference]: Without dead ends: 48734 [2020-10-16 11:38:11,130 INFO L677 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 [2020-10-16 11:38:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-10-16 11:38:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-10-16 11:38:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-10-16 11:38:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-10-16 11:38:14,445 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-10-16 11:38:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:14,445 INFO L481 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-10-16 11:38:14,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:38:14,445 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-10-16 11:38:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:38:14,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:14,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:14,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-16 11:38:14,446 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-10-16 11:38:14,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:14,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532885318] [2020-10-16 11:38:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:38:14,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532885318] [2020-10-16 11:38:14,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:38:14,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:38:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227306247] [2020-10-16 11:38:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:38:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:38:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:38:14,473 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-10-16 11:38:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:14,775 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-10-16 11:38:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:38:14,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:38:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:14,927 INFO L225 Difference]: With dead ends: 56827 [2020-10-16 11:38:14,927 INFO L226 Difference]: Without dead ends: 56827 [2020-10-16 11:38:14,927 INFO L677 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 [2020-10-16 11:38:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-10-16 11:38:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-10-16 11:38:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-10-16 11:38:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-10-16 11:38:19,101 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-10-16 11:38:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:19,102 INFO L481 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-10-16 11:38:19,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:38:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-10-16 11:38:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:38:19,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:19,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:19,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-16 11:38:19,102 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-10-16 11:38:19,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:19,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080285785] [2020-10-16 11:38:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:38:19,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080285785] [2020-10-16 11:38:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3194608] [2020-10-16 11:38:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:38:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:38:19,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:19,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-10-16 11:38:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959520069] [2020-10-16 11:38:19,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:38:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:38:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:38:19,279 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 7 states. [2020-10-16 11:38:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:19,643 INFO L93 Difference]: Finished difference Result 63378 states and 247554 transitions. [2020-10-16 11:38:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:38:19,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-16 11:38:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:19,806 INFO L225 Difference]: With dead ends: 63378 [2020-10-16 11:38:19,807 INFO L226 Difference]: Without dead ends: 63378 [2020-10-16 11:38:19,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:38:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63378 states. [2020-10-16 11:38:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63378 to 59796. [2020-10-16 11:38:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59796 states. [2020-10-16 11:38:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59796 states to 59796 states and 233988 transitions. [2020-10-16 11:38:22,259 INFO L78 Accepts]: Start accepts. Automaton has 59796 states and 233988 transitions. Word has length 17 [2020-10-16 11:38:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:22,260 INFO L481 AbstractCegarLoop]: Abstraction has 59796 states and 233988 transitions. [2020-10-16 11:38:22,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:38:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59796 states and 233988 transitions. [2020-10-16 11:38:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-16 11:38:22,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:22,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:22,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:22,469 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash -157038029, now seen corresponding path program 1 times [2020-10-16 11:38:22,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:22,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921188346] [2020-10-16 11:38:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-16 11:38:22,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921188346] [2020-10-16 11:38:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35447487] [2020-10-16 11:38:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:38:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 11:38:22,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:22,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-16 11:38:22,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482140607] [2020-10-16 11:38:22,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:38:22,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:38:22,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:38:22,659 INFO L87 Difference]: Start difference. First operand 59796 states and 233988 transitions. Second operand 9 states. [2020-10-16 11:38:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:23,007 INFO L93 Difference]: Finished difference Result 64269 states and 243651 transitions. [2020-10-16 11:38:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:38:23,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-16 11:38:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:23,170 INFO L225 Difference]: With dead ends: 64269 [2020-10-16 11:38:23,170 INFO L226 Difference]: Without dead ends: 64269 [2020-10-16 11:38:23,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:38:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64269 states. [2020-10-16 11:38:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64269 to 60687. [2020-10-16 11:38:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60687 states. [2020-10-16 11:38:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60687 states to 60687 states and 231362 transitions. [2020-10-16 11:38:27,576 INFO L78 Accepts]: Start accepts. Automaton has 60687 states and 231362 transitions. Word has length 30 [2020-10-16 11:38:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:27,576 INFO L481 AbstractCegarLoop]: Abstraction has 60687 states and 231362 transitions. [2020-10-16 11:38:27,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:38:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60687 states and 231362 transitions. [2020-10-16 11:38:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-16 11:38:27,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:27,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:27,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:38:27,780 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1773061914, now seen corresponding path program 1 times [2020-10-16 11:38:27,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:27,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338539031] [2020-10-16 11:38:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:38:27,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338539031] [2020-10-16 11:38:27,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888582974] [2020-10-16 11:38:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:38:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:38:28,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:28,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:38:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576581141] [2020-10-16 11:38:28,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:38:28,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:28,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:38:28,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:38:28,032 INFO L87 Difference]: Start difference. First operand 60687 states and 231362 transitions. Second operand 10 states. [2020-10-16 11:38:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:29,328 INFO L93 Difference]: Finished difference Result 60585 states and 231143 transitions. [2020-10-16 11:38:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:38:29,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-16 11:38:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:29,551 INFO L225 Difference]: With dead ends: 60585 [2020-10-16 11:38:29,551 INFO L226 Difference]: Without dead ends: 60585 [2020-10-16 11:38:29,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:38:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60585 states. [2020-10-16 11:38:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60585 to 60585. [2020-10-16 11:38:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60585 states. [2020-10-16 11:38:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60585 states to 60585 states and 231143 transitions. [2020-10-16 11:38:31,156 INFO L78 Accepts]: Start accepts. Automaton has 60585 states and 231143 transitions. Word has length 43 [2020-10-16 11:38:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:31,156 INFO L481 AbstractCegarLoop]: Abstraction has 60585 states and 231143 transitions. [2020-10-16 11:38:31,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:38:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60585 states and 231143 transitions. [2020-10-16 11:38:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-16 11:38:31,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:31,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:31,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:38:31,371 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1454617507, now seen corresponding path program 1 times [2020-10-16 11:38:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657833178] [2020-10-16 11:38:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:38:31,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657833178] [2020-10-16 11:38:31,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693614299] [2020-10-16 11:38:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:38:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:38:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:38:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:38:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:38:31,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:38:31,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 11:38:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873918797] [2020-10-16 11:38:31,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:38:31,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:38:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:38:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:38:31,601 INFO L87 Difference]: Start difference. First operand 60585 states and 231143 transitions. Second operand 12 states. [2020-10-16 11:38:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:38:34,116 INFO L93 Difference]: Finished difference Result 60305 states and 230407 transitions. [2020-10-16 11:38:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:38:34,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-16 11:38:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:38:34,276 INFO L225 Difference]: With dead ends: 60305 [2020-10-16 11:38:34,276 INFO L226 Difference]: Without dead ends: 60305 [2020-10-16 11:38:34,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:38:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2020-10-16 11:38:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 60305. [2020-10-16 11:38:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60305 states. [2020-10-16 11:38:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60305 states to 60305 states and 230407 transitions. [2020-10-16 11:38:35,910 INFO L78 Accepts]: Start accepts. Automaton has 60305 states and 230407 transitions. Word has length 49 [2020-10-16 11:38:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:38:35,910 INFO L481 AbstractCegarLoop]: Abstraction has 60305 states and 230407 transitions. [2020-10-16 11:38:35,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:38:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 60305 states and 230407 transitions. [2020-10-16 11:38:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-16 11:38:35,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:38:35,927 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:38:36,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:38:36,134 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:38:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:38:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-10-16 11:38:36,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:38:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821773368] [2020-10-16 11:38:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:38:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:38:36,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:38:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:38:36,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:38:36,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:38:36,187 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:38:36,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-16 11:38:36,187 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 11:38:36,188 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 11:38:36,188 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,199 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,200 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,201 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,202 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,203 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,204 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,205 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,206 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,207 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,207 WARN L313 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,207 WARN L313 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,208 WARN L313 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,208 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,209 WARN L313 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,210 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,210 WARN L313 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,210 WARN L313 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,211 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,211 WARN L313 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,211 WARN L313 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,212 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,212 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,213 WARN L313 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,213 WARN L313 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,214 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,214 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,214 WARN L313 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,214 WARN L313 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,215 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,215 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,215 WARN L313 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,216 WARN L313 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,217 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,217 WARN L313 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,217 WARN L313 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,218 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,218 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,218 WARN L313 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,219 WARN L313 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:38:36,224 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2020-10-16 11:38:36,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:38:36,225 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:38:36,225 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:38:36,225 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:38:36,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:38:36,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:38:36,225 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:38:36,226 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:38:36,226 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:38:36,227 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:38:36,227 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-16 11:38:36,227 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 132 transitions, 408 flow [2020-10-16 11:38:36,227 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-10-16 11:38:38,903 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-10-16 11:38:38,903 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 11:38:39,044 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. [2020-10-16 11:38:39,456 INFO L117 LiptonReduction]: Number of co-enabled transitions 5472 [2020-10-16 11:38:41,338 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-16 11:38:42,184 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2020-10-16 11:38:42,294 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-16 11:38:42,525 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-16 11:38:42,634 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-16 11:38:42,640 INFO L132 LiptonReduction]: Checked pairs total: 11917 [2020-10-16 11:38:42,640 INFO L134 LiptonReduction]: Total number of compositions: 104 [2020-10-16 11:38:42,641 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-10-16 11:39:27,563 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-10-16 11:39:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-10-16 11:39:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-16 11:39:27,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:27,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-16 11:39:27,564 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-10-16 11:39:27,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:27,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004609469] [2020-10-16 11:39:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:39:27,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004609469] [2020-10-16 11:39:27,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:39:27,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:39:27,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72376710] [2020-10-16 11:39:27,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:39:27,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:27,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:39:27,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:39:27,578 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-10-16 11:39:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:28,520 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-10-16 11:39:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:39:28,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-16 11:39:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:30,268 INFO L225 Difference]: With dead ends: 163089 [2020-10-16 11:39:30,268 INFO L226 Difference]: Without dead ends: 143404 [2020-10-16 11:39:30,268 INFO L677 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 [2020-10-16 11:39:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-10-16 11:39:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143404 to 143404. [2020-10-16 11:39:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143404 states. [2020-10-16 11:39:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143404 states to 143404 states and 638584 transitions. [2020-10-16 11:39:43,336 INFO L78 Accepts]: Start accepts. Automaton has 143404 states and 638584 transitions. Word has length 4 [2020-10-16 11:39:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:39:43,337 INFO L481 AbstractCegarLoop]: Abstraction has 143404 states and 638584 transitions. [2020-10-16 11:39:43,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:39:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 143404 states and 638584 transitions. [2020-10-16 11:39:43,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:39:43,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:39:43,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:39:43,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-16 11:39:43,337 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:39:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:39:43,338 INFO L82 PathProgramCache]: Analyzing trace with hash 288657511, now seen corresponding path program 1 times [2020-10-16 11:39:43,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:39:43,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593024513] [2020-10-16 11:39:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:39:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:39:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:39:43,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593024513] [2020-10-16 11:39:43,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:39:43,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:39:43,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173957604] [2020-10-16 11:39:43,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:39:43,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:39:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:39:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:39:43,361 INFO L87 Difference]: Start difference. First operand 143404 states and 638584 transitions. Second operand 4 states. [2020-10-16 11:39:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:39:52,162 INFO L93 Difference]: Finished difference Result 166667 states and 731394 transitions. [2020-10-16 11:39:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:39:52,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-16 11:39:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:39:52,818 INFO L225 Difference]: With dead ends: 166667 [2020-10-16 11:39:52,818 INFO L226 Difference]: Without dead ends: 166667 [2020-10-16 11:39:52,818 INFO L677 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 [2020-10-16 11:39:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166667 states. [2020-10-16 11:40:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166667 to 162061. [2020-10-16 11:40:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162061 states. [2020-10-16 11:40:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162061 states to 162061 states and 710659 transitions. [2020-10-16 11:40:07,918 INFO L78 Accepts]: Start accepts. Automaton has 162061 states and 710659 transitions. Word has length 10 [2020-10-16 11:40:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:07,918 INFO L481 AbstractCegarLoop]: Abstraction has 162061 states and 710659 transitions. [2020-10-16 11:40:07,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:40:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 162061 states and 710659 transitions. [2020-10-16 11:40:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:40:07,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:07,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-16 11:40:07,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 941132211, now seen corresponding path program 1 times [2020-10-16 11:40:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453130060] [2020-10-16 11:40:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453130060] [2020-10-16 11:40:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133974815] [2020-10-16 11:40:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:40:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:40:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:08,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:08,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 11:40:08,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473912781] [2020-10-16 11:40:08,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:40:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:40:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:40:08,080 INFO L87 Difference]: Start difference. First operand 162061 states and 710659 transitions. Second operand 6 states. [2020-10-16 11:40:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:09,958 INFO L93 Difference]: Finished difference Result 162059 states and 710654 transitions. [2020-10-16 11:40:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:40:09,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-16 11:40:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:10,530 INFO L225 Difference]: With dead ends: 162059 [2020-10-16 11:40:10,530 INFO L226 Difference]: Without dead ends: 162059 [2020-10-16 11:40:10,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:40:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162059 states. [2020-10-16 11:40:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162059 to 162059. [2020-10-16 11:40:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162059 states. [2020-10-16 11:40:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162059 states to 162059 states and 710654 transitions. [2020-10-16 11:40:25,617 INFO L78 Accepts]: Start accepts. Automaton has 162059 states and 710654 transitions. Word has length 17 [2020-10-16 11:40:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:25,618 INFO L481 AbstractCegarLoop]: Abstraction has 162059 states and 710654 transitions. [2020-10-16 11:40:25,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:40:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 162059 states and 710654 transitions. [2020-10-16 11:40:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:40:25,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:25,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:25,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:40:25,819 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -220199302, now seen corresponding path program 1 times [2020-10-16 11:40:25,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:25,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928262463] [2020-10-16 11:40:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928262463] [2020-10-16 11:40:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314784312] [2020-10-16 11:40:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:40:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:40:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:25,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:25,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 11:40:25,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287919320] [2020-10-16 11:40:25,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:40:25,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:25,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:40:25,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:40:25,980 INFO L87 Difference]: Start difference. First operand 162059 states and 710654 transitions. Second operand 8 states. [2020-10-16 11:40:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:33,093 INFO L93 Difference]: Finished difference Result 162055 states and 710642 transitions. [2020-10-16 11:40:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:40:33,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-16 11:40:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:33,622 INFO L225 Difference]: With dead ends: 162055 [2020-10-16 11:40:33,622 INFO L226 Difference]: Without dead ends: 162055 [2020-10-16 11:40:33,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:40:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162055 states. [2020-10-16 11:40:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162055 to 162055. [2020-10-16 11:40:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162055 states. [2020-10-16 11:40:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162055 states to 162055 states and 710642 transitions. [2020-10-16 11:40:41,971 INFO L78 Accepts]: Start accepts. Automaton has 162055 states and 710642 transitions. Word has length 23 [2020-10-16 11:40:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:40:41,972 INFO L481 AbstractCegarLoop]: Abstraction has 162055 states and 710642 transitions. [2020-10-16 11:40:41,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:40:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 162055 states and 710642 transitions. [2020-10-16 11:40:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:40:41,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:40:41,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:40:42,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 11:40:42,173 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:40:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:40:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -406571168, now seen corresponding path program 1 times [2020-10-16 11:40:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:40:42,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322681032] [2020-10-16 11:40:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:40:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:42,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322681032] [2020-10-16 11:40:42,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833494506] [2020-10-16 11:40:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:40:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:40:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:40:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:40:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 11:40:42,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:40:42,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 11:40:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447576185] [2020-10-16 11:40:42,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:40:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:40:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:40:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:40:42,371 INFO L87 Difference]: Start difference. First operand 162055 states and 710642 transitions. Second operand 10 states. [2020-10-16 11:40:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:40:44,610 INFO L93 Difference]: Finished difference Result 162047 states and 710614 transitions. [2020-10-16 11:40:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:40:44,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-16 11:40:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:40:45,150 INFO L225 Difference]: With dead ends: 162047 [2020-10-16 11:40:45,150 INFO L226 Difference]: Without dead ends: 162047 [2020-10-16 11:40:45,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown