./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:15:02,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:15:02,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:15:02,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:15:02,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:15:02,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:15:02,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:15:02,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:15:02,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:15:02,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:15:02,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:15:02,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:15:02,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:15:02,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:15:02,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:15:02,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:15:02,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:15:02,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:15:02,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:15:02,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:15:02,711 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:15:02,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:15:02,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:15:02,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:15:02,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:15:02,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:15:02,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:15:02,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:15:02,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:15:02,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:15:02,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:15:02,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:15:02,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:15:02,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:15:02,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:15:02,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:15:02,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:15:02,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:15:02,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:15:02,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:15:02,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:15:02,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:15:02,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:15:02,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:15:02,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:15:02,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:15:02,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:15:02,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:15:02,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:15:02,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:15:02,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:15:02,748 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:15:02,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:15:02,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:15:02,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:15:02,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:15:02,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:15:02,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:15:02,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:15:02,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:15:02,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:15:02,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:15:02,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:15:02,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:15:02,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:15:02,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:15:02,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-07-22 21:15:02,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:15:02,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:15:02,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:15:02,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:15:02,957 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:15:02,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2022-07-22 21:15:03,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/822b737e1/34b867ae8e41459dbaf57f5bb0b2d583/FLAGee0841901 [2022-07-22 21:15:03,420 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:15:03,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2022-07-22 21:15:03,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/822b737e1/34b867ae8e41459dbaf57f5bb0b2d583/FLAGee0841901 [2022-07-22 21:15:03,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/822b737e1/34b867ae8e41459dbaf57f5bb0b2d583 [2022-07-22 21:15:03,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:15:03,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:15:03,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:15:03,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:15:03,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:15:03,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:15:03" (1/1) ... [2022-07-22 21:15:03,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b813a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:03, skipping insertion in model container [2022-07-22 21:15:03,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:15:03" (1/1) ... [2022-07-22 21:15:03,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:15:03,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:15:04,068 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-07-22 21:15:04,094 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:15:04,101 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:15:04,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-07-22 21:15:04,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:15:04,166 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:15:04,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04 WrapperNode [2022-07-22 21:15:04,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:15:04,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:15:04,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:15:04,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:15:04,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,204 INFO L137 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2022-07-22 21:15:04,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:15:04,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:15:04,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:15:04,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:15:04,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:15:04,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:15:04,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:15:04,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:15:04,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (1/1) ... [2022-07-22 21:15:04,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:15:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:04,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:15:04,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:15:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-07-22 21:15:04,308 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-07-22 21:15:04,308 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:15:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:15:04,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:15:04,309 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:15:04,396 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:15:04,406 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:15:04,620 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:15:04,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:15:04,629 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 21:15:04,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:15:04 BoogieIcfgContainer [2022-07-22 21:15:04,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:15:04,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:15:04,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:15:04,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:15:04,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:15:03" (1/3) ... [2022-07-22 21:15:04,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5f728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:15:04, skipping insertion in model container [2022-07-22 21:15:04,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:15:04" (2/3) ... [2022-07-22 21:15:04,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4de5f728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:15:04, skipping insertion in model container [2022-07-22 21:15:04,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:15:04" (3/3) ... [2022-07-22 21:15:04,641 INFO L111 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-07-22 21:15:04,658 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:15:04,665 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:15:04,666 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 21:15:04,666 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:15:04,757 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:15:04,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 173 places, 176 transitions, 368 flow [2022-07-22 21:15:04,865 INFO L129 PetriNetUnfolder]: 10/174 cut-off events. [2022-07-22 21:15:04,866 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:15:04,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 10/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 418 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-07-22 21:15:04,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 176 transitions, 368 flow [2022-07-22 21:15:04,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 164 transitions, 337 flow [2022-07-22 21:15:04,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:15:04,895 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ee0294c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@165ae1fb [2022-07-22 21:15:04,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-22 21:15:04,927 INFO L129 PetriNetUnfolder]: 5/130 cut-off events. [2022-07-22 21:15:04,928 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:15:04,928 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:04,929 INFO L200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:04,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash -211887483, now seen corresponding path program 1 times [2022-07-22 21:15:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:04,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583754461] [2022-07-22 21:15:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:04,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:05,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583754461] [2022-07-22 21:15:05,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583754461] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:05,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:05,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596819181] [2022-07-22 21:15:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:05,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:05,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:05,239 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-22 21:15:05,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 164 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,245 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:05,245 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-22 21:15:05,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:05,380 INFO L129 PetriNetUnfolder]: 88/703 cut-off events. [2022-07-22 21:15:05,380 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-07-22 21:15:05,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 886 conditions, 703 events. 88/703 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3110 event pairs, 32 based on Foata normal form. 69/706 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-07-22 21:15:05,390 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 20 selfloop transitions, 3 changer transitions 0/162 dead transitions. [2022-07-22 21:15:05,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 385 flow [2022-07-22 21:15:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-07-22 21:15:05,410 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9299242424242424 [2022-07-22 21:15:05,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-07-22 21:15:05,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-07-22 21:15:05,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:05,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-07-22 21:15:05,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,429 INFO L186 Difference]: Start difference. First operand has 161 places, 164 transitions, 337 flow. Second operand 3 states and 491 transitions. [2022-07-22 21:15:05,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 385 flow [2022-07-22 21:15:05,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 162 transitions, 377 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:15:05,437 INFO L242 Difference]: Finished difference. Result has 157 places, 156 transitions, 331 flow [2022-07-22 21:15:05,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=157, PETRI_TRANSITIONS=156} [2022-07-22 21:15:05,442 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, -4 predicate places. [2022-07-22 21:15:05,442 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 156 transitions, 331 flow [2022-07-22 21:15:05,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,443 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:05,443 INFO L200 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, 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, 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] [2022-07-22 21:15:05,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:15:05,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:05,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2060462298, now seen corresponding path program 1 times [2022-07-22 21:15:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:05,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049055727] [2022-07-22 21:15:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:05,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:05,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049055727] [2022-07-22 21:15:05,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049055727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:05,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:05,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:15:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316598922] [2022-07-22 21:15:05,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:15:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:15:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:15:05,562 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 176 [2022-07-22 21:15:05,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 156 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:05,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 176 [2022-07-22 21:15:05,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:05,669 INFO L129 PetriNetUnfolder]: 34/594 cut-off events. [2022-07-22 21:15:05,670 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-07-22 21:15:05,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 715 conditions, 594 events. 34/594 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2037 event pairs, 11 based on Foata normal form. 0/557 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-07-22 21:15:05,675 INFO L132 encePairwiseOnDemand]: 171/176 looper letters, 16 selfloop transitions, 4 changer transitions 0/164 dead transitions. [2022-07-22 21:15:05,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 164 transitions, 392 flow [2022-07-22 21:15:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:15:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:15:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2022-07-22 21:15:05,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9161931818181818 [2022-07-22 21:15:05,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2022-07-22 21:15:05,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2022-07-22 21:15:05,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:05,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2022-07-22 21:15:05,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,682 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,682 INFO L186 Difference]: Start difference. First operand has 157 places, 156 transitions, 331 flow. Second operand 4 states and 645 transitions. [2022-07-22 21:15:05,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 164 transitions, 392 flow [2022-07-22 21:15:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 164 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:05,688 INFO L242 Difference]: Finished difference. Result has 161 places, 159 transitions, 356 flow [2022-07-22 21:15:05,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=356, PETRI_PLACES=161, PETRI_TRANSITIONS=159} [2022-07-22 21:15:05,690 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2022-07-22 21:15:05,690 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 159 transitions, 356 flow [2022-07-22 21:15:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,690 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:05,691 INFO L200 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:15:05,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1664854431, now seen corresponding path program 1 times [2022-07-22 21:15:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:05,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412510547] [2022-07-22 21:15:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412510547] [2022-07-22 21:15:05,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412510547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:05,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:05,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:05,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541131765] [2022-07-22 21:15:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:05,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:05,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:05,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 176 [2022-07-22 21:15:05,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 159 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:05,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 176 [2022-07-22 21:15:05,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:05,939 INFO L129 PetriNetUnfolder]: 127/1271 cut-off events. [2022-07-22 21:15:05,939 INFO L130 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-07-22 21:15:05,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1676 conditions, 1271 events. 127/1271 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6938 event pairs, 33 based on Foata normal form. 12/1209 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-07-22 21:15:05,947 INFO L132 encePairwiseOnDemand]: 170/176 looper letters, 25 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-07-22 21:15:05,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 171 transitions, 447 flow [2022-07-22 21:15:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2022-07-22 21:15:05,950 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9204545454545454 [2022-07-22 21:15:05,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2022-07-22 21:15:05,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2022-07-22 21:15:05,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:05,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2022-07-22 21:15:05,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,953 INFO L186 Difference]: Start difference. First operand has 161 places, 159 transitions, 356 flow. Second operand 3 states and 486 transitions. [2022-07-22 21:15:05,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 171 transitions, 447 flow [2022-07-22 21:15:05,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 171 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:05,960 INFO L242 Difference]: Finished difference. Result has 164 places, 163 transitions, 396 flow [2022-07-22 21:15:05,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2022-07-22 21:15:05,962 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 3 predicate places. [2022-07-22 21:15:05,962 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 396 flow [2022-07-22 21:15:05,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:05,962 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:05,963 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:05,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:15:05,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash 172146190, now seen corresponding path program 1 times [2022-07-22 21:15:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845220615] [2022-07-22 21:15:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:05,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:06,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845220615] [2022-07-22 21:15:06,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845220615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:15:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549443327] [2022-07-22 21:15:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:06,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:06,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:15:06,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:15:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 21:15:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:15:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:15:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:06,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549443327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:15:06,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:15:06,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-22 21:15:06,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113673196] [2022-07-22 21:15:06,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:15:06,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:15:06,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:15:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:15:06,487 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-22 21:15:06,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:06,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:06,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-22 21:15:06,489 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:06,893 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([473] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][182], [Black: 192#(<= 1 ~top~0), Black: 178#(= ~top~0 0), 33#L946-2true, 190#true, 86#L1009-1true, 31#L1023-4true, 234#(<= ~top~0 0), Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), t2Thread1of1ForFork1InUse]) [2022-07-22 21:15:06,894 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-22 21:15:06,896 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-22 21:15:06,896 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-22 21:15:06,896 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-22 21:15:06,896 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([472] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][183], [116#L1011true, Black: 190#true, Black: 178#(= ~top~0 0), 33#L946-2true, 192#(<= 1 ~top~0), 31#L1023-4true, Black: 183#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 186#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret42#1| 0)), 196#true, t2Thread1of1ForFork1InUse]) [2022-07-22 21:15:06,896 INFO L384 tUnfolder$Statistics]: this new event has 189 ancestors and is cut-off event [2022-07-22 21:15:06,897 INFO L387 tUnfolder$Statistics]: existing Event has 161 ancestors and is cut-off event [2022-07-22 21:15:06,897 INFO L387 tUnfolder$Statistics]: existing Event has 168 ancestors and is cut-off event [2022-07-22 21:15:06,897 INFO L387 tUnfolder$Statistics]: existing Event has 169 ancestors and is cut-off event [2022-07-22 21:15:06,952 INFO L129 PetriNetUnfolder]: 387/3002 cut-off events. [2022-07-22 21:15:06,954 INFO L130 PetriNetUnfolder]: For 1007/1065 co-relation queries the response was YES. [2022-07-22 21:15:06,962 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 3002 events. 387/3002 cut-off events. For 1007/1065 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 21717 event pairs, 43 based on Foata normal form. 40/2882 useless extension candidates. Maximal degree in co-relation 3942. Up to 300 conditions per place. [2022-07-22 21:15:06,969 INFO L132 encePairwiseOnDemand]: 167/176 looper letters, 86 selfloop transitions, 46 changer transitions 1/273 dead transitions. [2022-07-22 21:15:06,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 1078 flow [2022-07-22 21:15:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:15:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:15:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2831 transitions. [2022-07-22 21:15:06,974 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8936237373737373 [2022-07-22 21:15:06,974 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2831 transitions. [2022-07-22 21:15:06,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2831 transitions. [2022-07-22 21:15:06,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:06,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2831 transitions. [2022-07-22 21:15:06,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 157.27777777777777) internal successors, (2831), 18 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:06,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:06,984 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:06,985 INFO L186 Difference]: Start difference. First operand has 164 places, 163 transitions, 396 flow. Second operand 18 states and 2831 transitions. [2022-07-22 21:15:06,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 1078 flow [2022-07-22 21:15:06,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 1016 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-07-22 21:15:06,991 INFO L242 Difference]: Finished difference. Result has 185 places, 218 transitions, 767 flow [2022-07-22 21:15:06,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=767, PETRI_PLACES=185, PETRI_TRANSITIONS=218} [2022-07-22 21:15:06,992 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 24 predicate places. [2022-07-22 21:15:06,992 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 218 transitions, 767 flow [2022-07-22 21:15:06,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 152.5) internal successors, (1525), 10 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:06,992 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:06,993 INFO L200 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, 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, 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, 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, 1] [2022-07-22 21:15:07,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:15:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:07,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 754166100, now seen corresponding path program 1 times [2022-07-22 21:15:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:07,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438202638] [2022-07-22 21:15:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:07,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:07,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438202638] [2022-07-22 21:15:07,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438202638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:07,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:07,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:15:07,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929544498] [2022-07-22 21:15:07,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:07,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:15:07,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:15:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:15:07,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 176 [2022-07-22 21:15:07,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 218 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:07,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 176 [2022-07-22 21:15:07,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:07,389 INFO L129 PetriNetUnfolder]: 54/1111 cut-off events. [2022-07-22 21:15:07,390 INFO L130 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-07-22 21:15:07,392 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 1111 events. 54/1111 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4843 event pairs, 9 based on Foata normal form. 18/1086 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-07-22 21:15:07,395 INFO L132 encePairwiseOnDemand]: 172/176 looper letters, 12 selfloop transitions, 4 changer transitions 0/177 dead transitions. [2022-07-22 21:15:07,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 177 transitions, 544 flow [2022-07-22 21:15:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:15:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:15:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-07-22 21:15:07,396 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-07-22 21:15:07,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-07-22 21:15:07,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-07-22 21:15:07,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:07,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-07-22 21:15:07,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,398 INFO L186 Difference]: Start difference. First operand has 185 places, 218 transitions, 767 flow. Second operand 3 states and 480 transitions. [2022-07-22 21:15:07,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 177 transitions, 544 flow [2022-07-22 21:15:07,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 522 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-07-22 21:15:07,402 INFO L242 Difference]: Finished difference. Result has 175 places, 175 transitions, 491 flow [2022-07-22 21:15:07,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=491, PETRI_PLACES=175, PETRI_TRANSITIONS=175} [2022-07-22 21:15:07,403 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 14 predicate places. [2022-07-22 21:15:07,403 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 175 transitions, 491 flow [2022-07-22 21:15:07,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:07,403 INFO L200 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:15:07,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2063782862, now seen corresponding path program 1 times [2022-07-22 21:15:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888454494] [2022-07-22 21:15:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888454494] [2022-07-22 21:15:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888454494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:07,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:07,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-07-22 21:15:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927827162] [2022-07-22 21:15:07,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:07,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 21:15:07,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 21:15:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-22 21:15:07,952 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-22 21:15:07,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 175 transitions, 491 flow. Second operand has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:07,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:07,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-22 21:15:07,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:10,834 INFO L129 PetriNetUnfolder]: 1122/4498 cut-off events. [2022-07-22 21:15:10,834 INFO L130 PetriNetUnfolder]: For 906/906 co-relation queries the response was YES. [2022-07-22 21:15:10,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8480 conditions, 4498 events. 1122/4498 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31947 event pairs, 173 based on Foata normal form. 20/4368 useless extension candidates. Maximal degree in co-relation 5128. Up to 1458 conditions per place. [2022-07-22 21:15:10,859 INFO L132 encePairwiseOnDemand]: 139/176 looper letters, 249 selfloop transitions, 59 changer transitions 33/427 dead transitions. [2022-07-22 21:15:10,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 427 transitions, 1859 flow [2022-07-22 21:15:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 21:15:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-22 21:15:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4579 transitions. [2022-07-22 21:15:10,867 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5912964876033058 [2022-07-22 21:15:10,867 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4579 transitions. [2022-07-22 21:15:10,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4579 transitions. [2022-07-22 21:15:10,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:10,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4579 transitions. [2022-07-22 21:15:10,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 104.06818181818181) internal successors, (4579), 44 states have internal predecessors, (4579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,891 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 176.0) internal successors, (7920), 45 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,891 INFO L186 Difference]: Start difference. First operand has 175 places, 175 transitions, 491 flow. Second operand 44 states and 4579 transitions. [2022-07-22 21:15:10,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 427 transitions, 1859 flow [2022-07-22 21:15:10,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 427 transitions, 1855 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:15:10,901 INFO L242 Difference]: Finished difference. Result has 256 places, 230 transitions, 974 flow [2022-07-22 21:15:10,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=974, PETRI_PLACES=256, PETRI_TRANSITIONS=230} [2022-07-22 21:15:10,903 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 95 predicate places. [2022-07-22 21:15:10,903 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 230 transitions, 974 flow [2022-07-22 21:15:10,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 99.54166666666667) internal successors, (2389), 24 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:10,906 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:10,906 INFO L200 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:10,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:15:10,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash -373448104, now seen corresponding path program 2 times [2022-07-22 21:15:10,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030369336] [2022-07-22 21:15:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:11,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030369336] [2022-07-22 21:15:11,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030369336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:11,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:11,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-07-22 21:15:11,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830213072] [2022-07-22 21:15:11,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:11,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 21:15:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 21:15:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-07-22 21:15:11,749 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-22 21:15:11,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 230 transitions, 974 flow. Second operand has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:11,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:11,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-22 21:15:11,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:14,997 INFO L129 PetriNetUnfolder]: 1758/7110 cut-off events. [2022-07-22 21:15:14,997 INFO L130 PetriNetUnfolder]: For 5414/5417 co-relation queries the response was YES. [2022-07-22 21:15:15,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16637 conditions, 7110 events. 1758/7110 cut-off events. For 5414/5417 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 54476 event pairs, 448 based on Foata normal form. 15/6993 useless extension candidates. Maximal degree in co-relation 11020. Up to 2353 conditions per place. [2022-07-22 21:15:15,051 INFO L132 encePairwiseOnDemand]: 138/176 looper letters, 291 selfloop transitions, 61 changer transitions 26/454 dead transitions. [2022-07-22 21:15:15,051 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 454 transitions, 2771 flow [2022-07-22 21:15:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 21:15:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-22 21:15:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3181 transitions. [2022-07-22 21:15:15,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5163961038961039 [2022-07-22 21:15:15,057 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3181 transitions. [2022-07-22 21:15:15,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3181 transitions. [2022-07-22 21:15:15,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:15,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3181 transitions. [2022-07-22 21:15:15,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.88571428571429) internal successors, (3181), 35 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:15,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:15,072 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 176.0) internal successors, (6336), 36 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:15,072 INFO L186 Difference]: Start difference. First operand has 256 places, 230 transitions, 974 flow. Second operand 35 states and 3181 transitions. [2022-07-22 21:15:15,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 454 transitions, 2771 flow [2022-07-22 21:15:15,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 454 transitions, 2759 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-22 21:15:15,091 INFO L242 Difference]: Finished difference. Result has 304 places, 265 transitions, 1449 flow [2022-07-22 21:15:15,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1449, PETRI_PLACES=304, PETRI_TRANSITIONS=265} [2022-07-22 21:15:15,092 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 143 predicate places. [2022-07-22 21:15:15,092 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 265 transitions, 1449 flow [2022-07-22 21:15:15,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.53571428571429) internal successors, (2395), 28 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:15,093 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:15,093 INFO L200 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:15:15,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:15:15,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 763029134, now seen corresponding path program 3 times [2022-07-22 21:15:15,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:15,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380350728] [2022-07-22 21:15:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:15,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:15,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:15,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380350728] [2022-07-22 21:15:15,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380350728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:15:15,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:15:15,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-22 21:15:15,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797525] [2022-07-22 21:15:15,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:15,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 21:15:15,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 21:15:15,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-22 21:15:15,752 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-22 21:15:15,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 265 transitions, 1449 flow. Second operand has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:15,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:15,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-22 21:15:15,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:19,286 INFO L129 PetriNetUnfolder]: 2029/8293 cut-off events. [2022-07-22 21:15:19,286 INFO L130 PetriNetUnfolder]: For 8659/8662 co-relation queries the response was YES. [2022-07-22 21:15:19,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20371 conditions, 8293 events. 2029/8293 cut-off events. For 8659/8662 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 67672 event pairs, 336 based on Foata normal form. 13/8152 useless extension candidates. Maximal degree in co-relation 12386. Up to 2262 conditions per place. [2022-07-22 21:15:19,359 INFO L132 encePairwiseOnDemand]: 140/176 looper letters, 293 selfloop transitions, 77 changer transitions 26/472 dead transitions. [2022-07-22 21:15:19,359 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 472 transitions, 3227 flow [2022-07-22 21:15:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 21:15:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-07-22 21:15:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3098 transitions. [2022-07-22 21:15:19,364 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5177139037433155 [2022-07-22 21:15:19,364 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3098 transitions. [2022-07-22 21:15:19,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3098 transitions. [2022-07-22 21:15:19,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:19,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3098 transitions. [2022-07-22 21:15:19,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.11764705882354) internal successors, (3098), 34 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:19,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:19,378 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 176.0) internal successors, (6160), 35 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:19,378 INFO L186 Difference]: Start difference. First operand has 304 places, 265 transitions, 1449 flow. Second operand 34 states and 3098 transitions. [2022-07-22 21:15:19,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 472 transitions, 3227 flow [2022-07-22 21:15:19,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 472 transitions, 3175 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-07-22 21:15:19,413 INFO L242 Difference]: Finished difference. Result has 338 places, 283 transitions, 1836 flow [2022-07-22 21:15:19,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1836, PETRI_PLACES=338, PETRI_TRANSITIONS=283} [2022-07-22 21:15:19,414 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 177 predicate places. [2022-07-22 21:15:19,414 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 283 transitions, 1836 flow [2022-07-22 21:15:19,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:19,415 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:19,416 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1] [2022-07-22 21:15:19,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 21:15:19,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash -870596139, now seen corresponding path program 1 times [2022-07-22 21:15:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:19,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088106785] [2022-07-22 21:15:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088106785] [2022-07-22 21:15:19,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088106785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:15:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797707123] [2022-07-22 21:15:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:19,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:19,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:19,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:15:19,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:15:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 21:15:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:15:21,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-22 21:15:21,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-22 21:15:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:21,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:15:22,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-07-22 21:15:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:15:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797707123] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:15:22,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:15:22,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-07-22 21:15:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31158238] [2022-07-22 21:15:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:15:22,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:15:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:15:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 21:15:22,927 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-22 21:15:22,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 283 transitions, 1836 flow. Second operand has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:22,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:22,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-22 21:15:22,929 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:15:29,614 INFO L129 PetriNetUnfolder]: 2737/11264 cut-off events. [2022-07-22 21:15:29,614 INFO L130 PetriNetUnfolder]: For 15461/15461 co-relation queries the response was YES. [2022-07-22 21:15:29,686 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 11264 events. 2737/11264 cut-off events. For 15461/15461 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 100525 event pairs, 405 based on Foata normal form. 8/11055 useless extension candidates. Maximal degree in co-relation 15448. Up to 1518 conditions per place. [2022-07-22 21:15:29,713 INFO L132 encePairwiseOnDemand]: 143/176 looper letters, 281 selfloop transitions, 210 changer transitions 3/580 dead transitions. [2022-07-22 21:15:29,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 580 transitions, 4357 flow [2022-07-22 21:15:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 21:15:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-22 21:15:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6634 transitions. [2022-07-22 21:15:29,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5798951048951049 [2022-07-22 21:15:29,721 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6634 transitions. [2022-07-22 21:15:29,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6634 transitions. [2022-07-22 21:15:29,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:15:29,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6634 transitions. [2022-07-22 21:15:29,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 102.06153846153846) internal successors, (6634), 65 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:29,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:29,742 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 176.0) internal successors, (11616), 66 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:29,743 INFO L186 Difference]: Start difference. First operand has 338 places, 283 transitions, 1836 flow. Second operand 65 states and 6634 transitions. [2022-07-22 21:15:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 580 transitions, 4357 flow [2022-07-22 21:15:29,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 4291 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-07-22 21:15:29,794 INFO L242 Difference]: Finished difference. Result has 401 places, 402 transitions, 3325 flow [2022-07-22 21:15:29,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3325, PETRI_PLACES=401, PETRI_TRANSITIONS=402} [2022-07-22 21:15:29,796 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 240 predicate places. [2022-07-22 21:15:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 402 transitions, 3325 flow [2022-07-22 21:15:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.63636363636364) internal successors, (2214), 22 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:29,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:15:29,797 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1] [2022-07-22 21:15:29,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:15:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 21:15:30,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:15:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:15:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1544280769, now seen corresponding path program 2 times [2022-07-22 21:15:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:15:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654023184] [2022-07-22 21:15:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:15:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:15:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:15:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:15:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:15:30,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654023184] [2022-07-22 21:15:30,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654023184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:15:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122377343] [2022-07-22 21:15:30,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:15:30,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:15:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:15:30,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:15:30,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:15:30,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 21:15:30,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:15:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 21:15:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:15:31,056 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:15:31,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:15:31,067 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:15:31,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:15:31,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-22 21:15:31,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2022-07-22 21:15:32,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-22 21:15:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 21:15:32,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:15:33,241 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_244) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-07-22 21:15:33,293 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:15:33,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-07-22 21:15:33,298 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:15:33,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-07-22 21:15:33,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-07-22 21:15:34,091 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-22 21:15:34,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-22 21:15:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 1 not checked. [2022-07-22 21:15:34,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122377343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:15:34,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:15:34,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 76 [2022-07-22 21:15:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212504065] [2022-07-22 21:15:34,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:15:34,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 21:15:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:15:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 21:15:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=5275, Unknown=1, NotChecked=146, Total=5700 [2022-07-22 21:15:34,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 176 [2022-07-22 21:15:34,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 402 transitions, 3325 flow. Second operand has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:15:34,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:15:34,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 176 [2022-07-22 21:15:34,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:16:35,473 INFO L129 PetriNetUnfolder]: 4492/19958 cut-off events. [2022-07-22 21:16:35,473 INFO L130 PetriNetUnfolder]: For 43776/43783 co-relation queries the response was YES. [2022-07-22 21:16:35,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57271 conditions, 19958 events. 4492/19958 cut-off events. For 43776/43783 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 202079 event pairs, 457 based on Foata normal form. 44/19639 useless extension candidates. Maximal degree in co-relation 32292. Up to 2318 conditions per place. [2022-07-22 21:16:35,691 INFO L132 encePairwiseOnDemand]: 131/176 looper letters, 736 selfloop transitions, 825 changer transitions 39/1676 dead transitions. [2022-07-22 21:16:35,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 1676 transitions, 14780 flow [2022-07-22 21:16:35,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-07-22 21:16:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2022-07-22 21:16:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 22286 transitions. [2022-07-22 21:16:35,711 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.49462890625 [2022-07-22 21:16:35,711 INFO L72 ComplementDD]: Start complementDD. Operand 256 states and 22286 transitions. [2022-07-22 21:16:35,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 256 states and 22286 transitions. [2022-07-22 21:16:35,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:16:35,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 256 states and 22286 transitions. [2022-07-22 21:16:35,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 257 states, 256 states have (on average 87.0546875) internal successors, (22286), 256 states have internal predecessors, (22286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:35,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:35,797 INFO L81 ComplementDD]: Finished complementDD. Result has 257 states, 257 states have (on average 176.0) internal successors, (45232), 257 states have internal predecessors, (45232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:35,798 INFO L186 Difference]: Start difference. First operand has 401 places, 402 transitions, 3325 flow. Second operand 256 states and 22286 transitions. [2022-07-22 21:16:35,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 1676 transitions, 14780 flow [2022-07-22 21:16:36,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1676 transitions, 12911 flow, removed 899 selfloop flow, removed 9 redundant places. [2022-07-22 21:16:36,025 INFO L242 Difference]: Finished difference. Result has 690 places, 1071 transitions, 9996 flow [2022-07-22 21:16:36,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=256, PETRI_FLOW=9996, PETRI_PLACES=690, PETRI_TRANSITIONS=1071} [2022-07-22 21:16:36,026 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 529 predicate places. [2022-07-22 21:16:36,027 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1071 transitions, 9996 flow [2022-07-22 21:16:36,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 86.32894736842105) internal successors, (6561), 76 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:36,028 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:16:36,028 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1] [2022-07-22 21:16:36,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:16:36,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:36,246 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:16:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:16:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1608662003, now seen corresponding path program 1 times [2022-07-22 21:16:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:16:36,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184936362] [2022-07-22 21:16:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:36,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:16:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:16:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:16:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184936362] [2022-07-22 21:16:36,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184936362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:16:36,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097321883] [2022-07-22 21:16:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:36,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:36,322 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:16:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:16:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:36,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:16:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:16:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 21:16:36,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:16:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-22 21:16:36,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097321883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:16:36,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:16:36,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-07-22 21:16:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107698215] [2022-07-22 21:16:36,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:16:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 21:16:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:16:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 21:16:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-22 21:16:36,753 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 176 [2022-07-22 21:16:36,754 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1071 transitions, 9996 flow. Second operand has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:36,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:16:36,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 176 [2022-07-22 21:16:36,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:16:41,588 INFO L129 PetriNetUnfolder]: 1397/14428 cut-off events. [2022-07-22 21:16:41,588 INFO L130 PetriNetUnfolder]: For 68989/69094 co-relation queries the response was YES. [2022-07-22 21:16:41,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 14428 events. 1397/14428 cut-off events. For 68989/69094 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 145511 event pairs, 297 based on Foata normal form. 29/14070 useless extension candidates. Maximal degree in co-relation 44938. Up to 1037 conditions per place. [2022-07-22 21:16:41,811 INFO L132 encePairwiseOnDemand]: 166/176 looper letters, 270 selfloop transitions, 200 changer transitions 3/1226 dead transitions. [2022-07-22 21:16:41,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1226 transitions, 12472 flow [2022-07-22 21:16:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:16:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:16:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2756 transitions. [2022-07-22 21:16:41,814 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8699494949494949 [2022-07-22 21:16:41,814 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2756 transitions. [2022-07-22 21:16:41,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2756 transitions. [2022-07-22 21:16:41,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:16:41,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2756 transitions. [2022-07-22 21:16:41,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 153.11111111111111) internal successors, (2756), 18 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:41,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:41,819 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:41,820 INFO L186 Difference]: Start difference. First operand has 690 places, 1071 transitions, 9996 flow. Second operand 18 states and 2756 transitions. [2022-07-22 21:16:41,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1226 transitions, 12472 flow [2022-07-22 21:16:42,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 1226 transitions, 10636 flow, removed 657 selfloop flow, removed 30 redundant places. [2022-07-22 21:16:42,207 INFO L242 Difference]: Finished difference. Result has 672 places, 1126 transitions, 9524 flow [2022-07-22 21:16:42,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9524, PETRI_PLACES=672, PETRI_TRANSITIONS=1126} [2022-07-22 21:16:42,209 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 511 predicate places. [2022-07-22 21:16:42,209 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1126 transitions, 9524 flow [2022-07-22 21:16:42,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.5) internal successors, (1818), 12 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:42,209 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:16:42,209 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:16:42,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:16:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:42,410 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:16:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:16:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1324549368, now seen corresponding path program 2 times [2022-07-22 21:16:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:16:42,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82995443] [2022-07-22 21:16:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:16:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:16:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82995443] [2022-07-22 21:16:42,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82995443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:16:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021673682] [2022-07-22 21:16:42,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:16:42,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:42,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:16:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:16:42,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:16:42,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:16:42,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:16:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:16:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:42,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:16:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:42,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021673682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:16:42,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:16:42,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-07-22 21:16:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752646611] [2022-07-22 21:16:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:16:42,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 21:16:42,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:16:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 21:16:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-22 21:16:42,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 176 [2022-07-22 21:16:42,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1126 transitions, 9524 flow. Second operand has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:42,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:16:42,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 176 [2022-07-22 21:16:42,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:16:49,604 INFO L129 PetriNetUnfolder]: 1720/18693 cut-off events. [2022-07-22 21:16:49,604 INFO L130 PetriNetUnfolder]: For 93925/94028 co-relation queries the response was YES. [2022-07-22 21:16:49,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56615 conditions, 18693 events. 1720/18693 cut-off events. For 93925/94028 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 196293 event pairs, 367 based on Foata normal form. 56/18266 useless extension candidates. Maximal degree in co-relation 55918. Up to 1525 conditions per place. [2022-07-22 21:16:49,996 INFO L132 encePairwiseOnDemand]: 169/176 looper letters, 356 selfloop transitions, 197 changer transitions 1/1327 dead transitions. [2022-07-22 21:16:49,996 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1327 transitions, 12592 flow [2022-07-22 21:16:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 21:16:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-22 21:16:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-07-22 21:16:49,999 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.882260101010101 [2022-07-22 21:16:49,999 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-07-22 21:16:49,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-07-22 21:16:50,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:16:50,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-07-22 21:16:50,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:50,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:50,005 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 176.0) internal successors, (3344), 19 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:50,005 INFO L186 Difference]: Start difference. First operand has 672 places, 1126 transitions, 9524 flow. Second operand 18 states and 2795 transitions. [2022-07-22 21:16:50,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1327 transitions, 12592 flow [2022-07-22 21:16:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 1327 transitions, 12418 flow, removed 77 selfloop flow, removed 5 redundant places. [2022-07-22 21:16:50,461 INFO L242 Difference]: Finished difference. Result has 686 places, 1188 transitions, 10510 flow [2022-07-22 21:16:50,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10510, PETRI_PLACES=686, PETRI_TRANSITIONS=1188} [2022-07-22 21:16:50,462 INFO L279 CegarLoopForPetriNet]: 161 programPoint places, 525 predicate places. [2022-07-22 21:16:50,463 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 1188 transitions, 10510 flow [2022-07-22 21:16:50,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 152.84615384615384) internal successors, (1987), 13 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:16:50,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:16:50,464 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:16:50,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:16:50,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 21:16:50,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-22 21:16:50,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:16:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2046476772, now seen corresponding path program 1 times [2022-07-22 21:16:50,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:16:50,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405424566] [2022-07-22 21:16:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:50,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:16:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:51,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:16:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405424566] [2022-07-22 21:16:51,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405424566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:16:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215371656] [2022-07-22 21:16:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:16:51,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:16:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:16:51,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:16:51,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:16:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:16:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-22 21:16:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:16:52,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-07-22 21:16:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:16:53,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 38 [2022-07-22 21:16:54,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-07-22 21:16:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:16:54,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:17:21,503 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:17:21,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-22 21:17:21,511 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:17:21,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2022-07-22 21:17:21,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2022-07-22 21:17:21,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:17:21,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-07-22 21:17:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:17:22,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215371656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:17:22,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:17:22,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 33] total 92 [2022-07-22 21:17:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689563633] [2022-07-22 21:17:22,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:17:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-22 21:17:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:17:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-22 21:17:22,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=7654, Unknown=24, NotChecked=0, Total=8372 [2022-07-22 21:17:22,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 176 [2022-07-22 21:17:22,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 1188 transitions, 10510 flow. Second operand has 92 states, 92 states have (on average 100.28260869565217) internal successors, (9226), 92 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:17:22,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:17:22,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 176 [2022-07-22 21:17:22,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:42,235 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 21:18:56,938 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)