/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-ext/16_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 17:23:05,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 17:23:05,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 17:23:05,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 17:23:05,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 17:23:05,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 17:23:05,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 17:23:05,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 17:23:05,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 17:23:05,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 17:23:05,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 17:23:05,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 17:23:05,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 17:23:05,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 17:23:05,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 17:23:05,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 17:23:05,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 17:23:05,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 17:23:05,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 17:23:05,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 17:23:05,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 17:23:05,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 17:23:05,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 17:23:05,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 17:23:05,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 17:23:05,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 17:23:05,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 17:23:05,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 17:23:05,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 17:23:05,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 17:23:05,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 17:23:05,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 17:23:05,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 17:23:05,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 17:23:05,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 17:23:05,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 17:23:05,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 17:23:05,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 17:23:05,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 17:23:05,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 17:23:05,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 17:23:05,711 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 17:23:05,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 17:23:05,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 17:23:05,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 17:23:05,712 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 17:23:05,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 17:23:05,713 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 17:23:05,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 17:23:05,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 17:23:05,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 17:23:05,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 17:23:05,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 17:23:05,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 17:23:05,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 17:23:05,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 17:23:05,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 17:23:05,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 17:23:05,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 17:23:05,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 17:23:05,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 17:23:05,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 17:23:05,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 17:23:06,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 17:23:06,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 17:23:06,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 17:23:06,011 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 17:23:06,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/16_peterson.i [2020-10-11 17:23:06,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f91ca0fb8/baf916afd4604e74bd7ef3b17821ef52/FLAGbce6564aa [2020-10-11 17:23:06,607 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 17:23:06,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/16_peterson.i [2020-10-11 17:23:06,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f91ca0fb8/baf916afd4604e74bd7ef3b17821ef52/FLAGbce6564aa [2020-10-11 17:23:06,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f91ca0fb8/baf916afd4604e74bd7ef3b17821ef52 [2020-10-11 17:23:06,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 17:23:06,916 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 17:23:06,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 17:23:06,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 17:23:06,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 17:23:06,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:23:06" (1/1) ... [2020-10-11 17:23:06,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f230283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:06, skipping insertion in model container [2020-10-11 17:23:06,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:23:06" (1/1) ... [2020-10-11 17:23:06,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 17:23:06,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 17:23:07,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 17:23:07,474 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 17:23:07,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 17:23:07,622 INFO L208 MainTranslator]: Completed translation [2020-10-11 17:23:07,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07 WrapperNode [2020-10-11 17:23:07,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 17:23:07,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 17:23:07,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 17:23:07,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 17:23:07,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 17:23:07,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 17:23:07,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 17:23:07,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 17:23:07,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... [2020-10-11 17:23:07,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 17:23:07,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 17:23:07,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 17:23:07,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 17:23:07,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 17:23:07,752 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-11 17:23:07,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-11 17:23:07,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 17:23:07,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 17:23:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 17:23:07,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 17:23:07,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 17:23:07,757 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 17:23:08,017 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 17:23:08,018 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-11 17:23:08,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:23:08 BoogieIcfgContainer [2020-10-11 17:23:08,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 17:23:08,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 17:23:08,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 17:23:08,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 17:23:08,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:23:06" (1/3) ... [2020-10-11 17:23:08,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991a62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:23:08, skipping insertion in model container [2020-10-11 17:23:08,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:23:07" (2/3) ... [2020-10-11 17:23:08,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7991a62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:23:08, skipping insertion in model container [2020-10-11 17:23:08,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:23:08" (3/3) ... [2020-10-11 17:23:08,028 INFO L111 eAbstractionObserver]: Analyzing ICFG 16_peterson.i [2020-10-11 17:23:08,042 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 17:23:08,052 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-11 17:23:08,053 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 17:23:08,100 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,101 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,101 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,101 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,102 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,102 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,112 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,112 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,112 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,113 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 17:23:08,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-11 17:23:08,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 17:23:08,161 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 17:23:08,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 17:23:08,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 17:23:08,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 17:23:08,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 17:23:08,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 17:23:08,162 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 17:23:08,172 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 49 places, 51 transitions, 107 flow [2020-10-11 17:23:08,204 INFO L129 PetriNetUnfolder]: 6/50 cut-off events. [2020-10-11 17:23:08,205 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:08,210 INFO L80 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 50 events. 6/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2020-10-11 17:23:08,210 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 51 transitions, 107 flow [2020-10-11 17:23:08,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 50 transitions, 103 flow [2020-10-11 17:23:08,229 INFO L129 PetriNetUnfolder]: 3/28 cut-off events. [2020-10-11 17:23:08,229 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:08,230 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:08,231 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:08,231 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1983207058, now seen corresponding path program 1 times [2020-10-11 17:23:08,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:08,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37754394] [2020-10-11 17:23:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:08,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37754394] [2020-10-11 17:23:08,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:08,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 17:23:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207008199] [2020-10-11 17:23:08,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 17:23:08,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 17:23:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 17:23:08,453 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 51 [2020-10-11 17:23:08,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 103 flow. Second operand 2 states. [2020-10-11 17:23:08,455 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:08,455 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 51 [2020-10-11 17:23:08,457 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:08,477 INFO L129 PetriNetUnfolder]: 2/46 cut-off events. [2020-10-11 17:23:08,478 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:08,479 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 46 events. 2/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-11 17:23:08,480 INFO L132 encePairwiseOnDemand]: 47/51 looper letters, 0 selfloop transitions, 0 changer transitions 0/46 dead transitions. [2020-10-11 17:23:08,481 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 95 flow [2020-10-11 17:23:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 17:23:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 17:23:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 98 transitions. [2020-10-11 17:23:08,495 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9607843137254902 [2020-10-11 17:23:08,496 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 98 transitions. [2020-10-11 17:23:08,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 98 transitions. [2020-10-11 17:23:08,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:08,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 98 transitions. [2020-10-11 17:23:08,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 17:23:08,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 17:23:08,508 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 17:23:08,510 INFO L185 Difference]: Start difference. First operand has 48 places, 50 transitions, 103 flow. Second operand 2 states and 98 transitions. [2020-10-11 17:23:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 95 flow [2020-10-11 17:23:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 17:23:08,518 INFO L241 Difference]: Finished difference. Result has 48 places, 46 transitions, 94 flow [2020-10-11 17:23:08,521 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2020-10-11 17:23:08,522 INFO L341 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2020-10-11 17:23:08,522 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 94 flow [2020-10-11 17:23:08,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 17:23:08,523 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:08,523 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:08,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 17:23:08,524 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:08,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:08,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1983177267, now seen corresponding path program 1 times [2020-10-11 17:23:08,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:08,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117776921] [2020-10-11 17:23:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:08,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117776921] [2020-10-11 17:23:08,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:08,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 17:23:08,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107882997] [2020-10-11 17:23:08,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 17:23:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 17:23:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 17:23:08,664 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 51 [2020-10-11 17:23:08,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 94 flow. Second operand 3 states. [2020-10-11 17:23:08,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:08,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 51 [2020-10-11 17:23:08,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:08,692 INFO L129 PetriNetUnfolder]: 3/72 cut-off events. [2020-10-11 17:23:08,693 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 17:23:08,694 INFO L80 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 72 events. 3/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 151 event pairs, 1 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 85. Up to 8 conditions per place. [2020-10-11 17:23:08,694 INFO L132 encePairwiseOnDemand]: 46/51 looper letters, 3 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2020-10-11 17:23:08,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 108 flow [2020-10-11 17:23:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 17:23:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 17:23:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2020-10-11 17:23:08,697 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2020-10-11 17:23:08,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:08,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 17:23:08,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 17:23:08,702 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 17:23:08,702 INFO L185 Difference]: Start difference. First operand has 48 places, 46 transitions, 94 flow. Second operand 3 states and 134 transitions. [2020-10-11 17:23:08,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 108 flow [2020-10-11 17:23:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 108 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 17:23:08,707 INFO L241 Difference]: Finished difference. Result has 52 places, 47 transitions, 114 flow [2020-10-11 17:23:08,709 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2020-10-11 17:23:08,710 INFO L341 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2020-10-11 17:23:08,710 INFO L481 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 114 flow [2020-10-11 17:23:08,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 17:23:08,711 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:08,711 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:08,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 17:23:08,711 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:08,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1840311886, now seen corresponding path program 1 times [2020-10-11 17:23:08,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:08,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005207641] [2020-10-11 17:23:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:08,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005207641] [2020-10-11 17:23:08,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:08,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 17:23:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372727819] [2020-10-11 17:23:08,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 17:23:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 17:23:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 17:23:08,818 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 51 [2020-10-11 17:23:08,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 114 flow. Second operand 3 states. [2020-10-11 17:23:08,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:08,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 51 [2020-10-11 17:23:08,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:08,845 INFO L129 PetriNetUnfolder]: 4/84 cut-off events. [2020-10-11 17:23:08,845 INFO L130 PetriNetUnfolder]: For 16/19 co-relation queries the response was YES. [2020-10-11 17:23:08,846 INFO L80 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 84 events. 4/84 cut-off events. For 16/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 213 event pairs, 2 based on Foata normal form. 4/84 useless extension candidates. Maximal degree in co-relation 118. Up to 11 conditions per place. [2020-10-11 17:23:08,847 INFO L132 encePairwiseOnDemand]: 47/51 looper letters, 4 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2020-10-11 17:23:08,847 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 126 flow [2020-10-11 17:23:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 17:23:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 17:23:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2020-10-11 17:23:08,850 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8758169934640523 [2020-10-11 17:23:08,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:08,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 134 transitions. [2020-10-11 17:23:08,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 17:23:08,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 17:23:08,854 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 17:23:08,854 INFO L185 Difference]: Start difference. First operand has 52 places, 47 transitions, 114 flow. Second operand 3 states and 134 transitions. [2020-10-11 17:23:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 126 flow [2020-10-11 17:23:08,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 17:23:08,858 INFO L241 Difference]: Finished difference. Result has 53 places, 47 transitions, 118 flow [2020-10-11 17:23:08,859 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2020-10-11 17:23:08,859 INFO L341 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2020-10-11 17:23:08,859 INFO L481 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 118 flow [2020-10-11 17:23:08,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 17:23:08,859 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:08,860 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:08,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 17:23:08,860 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1244669700, now seen corresponding path program 1 times [2020-10-11 17:23:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:08,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181797267] [2020-10-11 17:23:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181797267] [2020-10-11 17:23:08,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:08,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 17:23:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954131200] [2020-10-11 17:23:08,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 17:23:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 17:23:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 17:23:09,007 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 51 [2020-10-11 17:23:09,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 118 flow. Second operand 4 states. [2020-10-11 17:23:09,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:09,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 51 [2020-10-11 17:23:09,008 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:09,071 INFO L129 PetriNetUnfolder]: 18/127 cut-off events. [2020-10-11 17:23:09,071 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2020-10-11 17:23:09,072 INFO L80 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 127 events. 18/127 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 392 event pairs, 4 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 197. Up to 13 conditions per place. [2020-10-11 17:23:09,073 INFO L132 encePairwiseOnDemand]: 44/51 looper letters, 9 selfloop transitions, 6 changer transitions 1/54 dead transitions. [2020-10-11 17:23:09,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 164 flow [2020-10-11 17:23:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 17:23:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 17:23:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2020-10-11 17:23:09,076 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2020-10-11 17:23:09,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:09,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 17:23:09,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 17:23:09,079 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 17:23:09,079 INFO L185 Difference]: Start difference. First operand has 53 places, 47 transitions, 118 flow. Second operand 4 states and 170 transitions. [2020-10-11 17:23:09,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 164 flow [2020-10-11 17:23:09,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 17:23:09,083 INFO L241 Difference]: Finished difference. Result has 58 places, 52 transitions, 162 flow [2020-10-11 17:23:09,083 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2020-10-11 17:23:09,083 INFO L341 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2020-10-11 17:23:09,083 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 162 flow [2020-10-11 17:23:09,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 17:23:09,084 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 17:23:09,084 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 17:23:09,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 17:23:09,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 17:23:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 17:23:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash -973313908, now seen corresponding path program 2 times [2020-10-11 17:23:09,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 17:23:09,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295316089] [2020-10-11 17:23:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 17:23:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 17:23:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 17:23:09,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295316089] [2020-10-11 17:23:09,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 17:23:09,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 17:23:09,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59530771] [2020-10-11 17:23:09,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 17:23:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 17:23:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 17:23:09,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-11 17:23:09,207 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 51 [2020-10-11 17:23:09,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 162 flow. Second operand 4 states. [2020-10-11 17:23:09,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 17:23:09,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 51 [2020-10-11 17:23:09,208 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 17:23:09,231 INFO L129 PetriNetUnfolder]: 20/95 cut-off events. [2020-10-11 17:23:09,231 INFO L130 PetriNetUnfolder]: For 25/26 co-relation queries the response was YES. [2020-10-11 17:23:09,232 INFO L80 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 95 events. 20/95 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 5/97 useless extension candidates. Maximal degree in co-relation 201. Up to 19 conditions per place. [2020-10-11 17:23:09,232 INFO L132 encePairwiseOnDemand]: 44/51 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2020-10-11 17:23:09,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 214 flow [2020-10-11 17:23:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 17:23:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-11 17:23:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2020-10-11 17:23:09,235 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2020-10-11 17:23:09,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 17:23:09,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 170 transitions. [2020-10-11 17:23:09,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-11 17:23:09,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-11 17:23:09,238 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-11 17:23:09,238 INFO L185 Difference]: Start difference. First operand has 58 places, 52 transitions, 162 flow. Second operand 4 states and 170 transitions. [2020-10-11 17:23:09,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 214 flow [2020-10-11 17:23:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 206 flow, removed 3 selfloop flow, removed 1 redundant places. [2020-10-11 17:23:09,241 INFO L241 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2020-10-11 17:23:09,241 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2020-10-11 17:23:09,242 INFO L341 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2020-10-11 17:23:09,242 INFO L481 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2020-10-11 17:23:09,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 17:23:09,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 17:23:09,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 05:23:09 BasicIcfg [2020-10-11 17:23:09,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 17:23:09,252 INFO L168 Benchmark]: Toolchain (without parser) took 2335.28 ms. Allocated memory was 251.7 MB in the beginning and 361.2 MB in the end (delta: 109.6 MB). Free memory was 207.4 MB in the beginning and 298.5 MB in the end (delta: -91.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:09,252 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 17:23:09,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.15 ms. Allocated memory was 251.7 MB in the beginning and 315.6 MB in the end (delta: 64.0 MB). Free memory was 207.4 MB in the beginning and 271.5 MB in the end (delta: -64.0 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:09,254 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.84 ms. Allocated memory is still 315.6 MB. Free memory was 271.5 MB in the beginning and 268.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:09,255 INFO L168 Benchmark]: Boogie Preprocessor took 27.00 ms. Allocated memory is still 315.6 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 17:23:09,255 INFO L168 Benchmark]: RCFGBuilder took 323.46 ms. Allocated memory is still 315.6 MB. Free memory was 268.9 MB in the beginning and 249.6 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 14.2 GB. [2020-10-11 17:23:09,256 INFO L168 Benchmark]: TraceAbstraction took 1227.41 ms. Allocated memory was 315.6 MB in the beginning and 361.2 MB in the end (delta: 45.6 MB). Free memory was 249.6 MB in the beginning and 298.5 MB in the end (delta: -49.0 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 17:23:09,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 705.15 ms. Allocated memory was 251.7 MB in the beginning and 315.6 MB in the end (delta: 64.0 MB). Free memory was 207.4 MB in the beginning and 271.5 MB in the end (delta: -64.0 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.84 ms. Allocated memory is still 315.6 MB. Free memory was 271.5 MB in the beginning and 268.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.00 ms. Allocated memory is still 315.6 MB. Free memory is still 268.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 323.46 ms. Allocated memory is still 315.6 MB. Free memory was 268.9 MB in the beginning and 249.6 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 1227.41 ms. Allocated memory was 315.6 MB in the beginning and 361.2 MB in the end (delta: 45.6 MB). Free memory was 249.6 MB in the beginning and 298.5 MB in the end (delta: -49.0 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 681]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 690]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 26 SDslu, 10 SDs, 0 SdLazy, 50 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 3804 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...