./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/weaver/popl20-simple-queue.wvr.c -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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:14:54,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:14:54,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:14:54,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:14:54,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:14:54,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:14:54,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:14:54,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:14:54,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:14:54,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:14:54,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:14:54,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:14:54,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:14:54,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:14:54,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:14:54,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:14:54,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:14:54,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:14:54,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:14:54,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:14:54,696 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:14:54,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:14:54,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:14:54,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:14:54,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:14:54,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:14:54,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:14:54,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:14:54,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:14:54,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:14:54,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:14:54,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:14:54,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:14:54,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:14:54,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:14:54,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:14:54,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:14:54,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:14:54,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:14:54,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:14:54,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:14:54,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:14:54,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:14:54,750 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:14:54,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:14:54,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:14:54,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:14:54,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:14:54,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:14:54,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:14:54,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:14:54,752 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:14:54,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:14:54,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:14:54,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:14:54,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:14:54,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:14:54,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:14:54,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:14:54,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:14:54,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:14:54,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:14:54,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:14:54,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:14:54,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:14:54,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:14:54,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:14:54,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:14:54,756 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:14:54,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:14:54,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:14:54,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-07-21 09:14:55,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:14:55,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:14:55,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:14:55,064 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:14:55,066 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:14:55,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-21 09:14:55,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3743b9d07/c206b53525b84cecb12f1ee3c657ec8f/FLAG4e410deb9 [2022-07-21 09:14:55,468 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:14:55,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-21 09:14:55,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3743b9d07/c206b53525b84cecb12f1ee3c657ec8f/FLAG4e410deb9 [2022-07-21 09:14:55,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3743b9d07/c206b53525b84cecb12f1ee3c657ec8f [2022-07-21 09:14:55,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:14:55,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:14:55,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:14:55,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:14:55,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:14:55,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:14:55" (1/1) ... [2022-07-21 09:14:55,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42004706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:55, skipping insertion in model container [2022-07-21 09:14:55,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:14:55" (1/1) ... [2022-07-21 09:14:55,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:14:55,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:14:56,020 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/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-07-21 09:14:56,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:14:56,041 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:14:56,102 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/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-07-21 09:14:56,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:14:56,124 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:14:56,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56 WrapperNode [2022-07-21 09:14:56,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:14:56,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:14:56,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:14:56,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:14:56,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,169 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-07-21 09:14:56,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:14:56,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:14:56,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:14:56,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:14:56,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:14:56,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:14:56,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:14:56,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:14:56,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (1/1) ... [2022-07-21 09:14:56,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:14:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:56,235 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) [2022-07-21 09:14:56,254 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 [2022-07-21 09:14:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:14:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:14:56,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:14:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:14:56,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:14:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:14:56,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:14:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:14:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:14:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:14:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:14:56,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:14:56,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:14:56,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:14:56,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:14:56,270 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:14:56,370 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:14:56,371 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:14:56,543 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:14:56,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:14:56,589 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 09:14:56,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:14:56 BoogieIcfgContainer [2022-07-21 09:14:56,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:14:56,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:14:56,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:14:56,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:14:56,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:14:55" (1/3) ... [2022-07-21 09:14:56,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0f98e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:14:56, skipping insertion in model container [2022-07-21 09:14:56,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:14:56" (2/3) ... [2022-07-21 09:14:56,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0f98e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:14:56, skipping insertion in model container [2022-07-21 09:14:56,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:14:56" (3/3) ... [2022-07-21 09:14:56,606 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-07-21 09:14:56,610 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:14:56,615 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:14:56,616 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:14:56,616 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:14:56,643 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:14:56,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-07-21 09:14:56,695 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-07-21 09:14:56,696 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:14:56,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-07-21 09:14:56,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-07-21 09:14:56,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-07-21 09:14:56,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:14:56,712 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@76b09bcd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7cc90509 [2022-07-21 09:14:56,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:14:56,734 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-21 09:14:56,739 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:14:56,740 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:56,740 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] [2022-07-21 09:14:56,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash -93732278, now seen corresponding path program 1 times [2022-07-21 09:14:56,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255972364] [2022-07-21 09:14:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:56,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255972364] [2022-07-21 09:14:56,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255972364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:56,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:56,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:14:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444798875] [2022-07-21 09:14:56,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:56,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:14:56,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:14:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:14:56,966 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-07-21 09:14:56,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 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) [2022-07-21 09:14:56,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:56,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-07-21 09:14:56,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:57,032 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-07-21 09:14:57,033 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:14:57,035 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-21 09:14:57,036 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-07-21 09:14:57,036 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-07-21 09:14:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:14:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:14:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-07-21 09:14:57,046 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-07-21 09:14:57,047 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-07-21 09:14:57,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-07-21 09:14:57,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:57,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-07-21 09:14:57,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 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) [2022-07-21 09:14:57,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2022-07-21 09:14:57,060 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2022-07-21 09:14:57,062 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-07-21 09:14:57,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-07-21 09:14:57,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:14:57,069 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-07-21 09:14:57,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-21 09:14:57,073 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-07-21 09:14:57,073 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-07-21 09:14:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 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) [2022-07-21 09:14:57,074 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:57,074 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] [2022-07-21 09:14:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:14:57,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1102375271, now seen corresponding path program 1 times [2022-07-21 09:14:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047483110] [2022-07-21 09:14:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:57,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:57,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047483110] [2022-07-21 09:14:57,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047483110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:57,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:57,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:14:57,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099363314] [2022-07-21 09:14:57,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:14:57,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:57,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:14:57,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:14:57,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-21 09:14:57,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2022-07-21 09:14:57,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:57,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-21 09:14:57,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:57,373 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-07-21 09:14:57,373 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 09:14:57,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-07-21 09:14:57,374 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-07-21 09:14:57,374 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-07-21 09:14:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:14:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:14:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-07-21 09:14:57,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-07-21 09:14:57,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-07-21 09:14:57,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-07-21 09:14:57,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:57,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-07-21 09:14:57,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 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) [2022-07-21 09:14:57,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 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) [2022-07-21 09:14:57,384 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 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) [2022-07-21 09:14:57,385 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-07-21 09:14:57,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-07-21 09:14:57,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:14:57,388 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-07-21 09:14:57,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-21 09:14:57,389 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-21 09:14:57,389 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-07-21 09:14:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2022-07-21 09:14:57,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:57,391 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] [2022-07-21 09:14:57,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:14:57,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1844346479, now seen corresponding path program 1 times [2022-07-21 09:14:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415060240] [2022-07-21 09:14:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:57,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415060240] [2022-07-21 09:14:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415060240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:14:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760579883] [2022-07-21 09:14:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:57,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:14:57,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:14:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:14:57,498 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-21 09:14:57,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2022-07-21 09:14:57,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:57,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-21 09:14:57,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:57,533 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-07-21 09:14:57,534 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-21 09:14:57,535 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-07-21 09:14:57,535 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-07-21 09:14:57,536 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-07-21 09:14:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:14:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:14:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-07-21 09:14:57,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-21 09:14:57,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-07-21 09:14:57,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-07-21 09:14:57,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:57,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-07-21 09:14:57,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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) [2022-07-21 09:14:57,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 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) [2022-07-21 09:14:57,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 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) [2022-07-21 09:14:57,540 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-07-21 09:14:57,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-07-21 09:14:57,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:14:57,551 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-07-21 09:14:57,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-07-21 09:14:57,553 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-07-21 09:14:57,553 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-07-21 09:14:57,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2022-07-21 09:14:57,554 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:57,554 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] [2022-07-21 09:14:57,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:14:57,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:57,555 INFO L85 PathProgramCache]: Analyzing trace with hash 488492189, now seen corresponding path program 1 times [2022-07-21 09:14:57,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914028839] [2022-07-21 09:14:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:14:57,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:57,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914028839] [2022-07-21 09:14:57,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914028839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:14:57,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:14:57,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 09:14:57,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967196456] [2022-07-21 09:14:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:14:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:14:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:14:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:14:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:14:57,638 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-07-21 09:14:57,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 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) [2022-07-21 09:14:57,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:14:57,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-07-21 09:14:57,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:14:57,700 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-07-21 09:14:57,701 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-21 09:14:57,701 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-07-21 09:14:57,702 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-07-21 09:14:57,702 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-07-21 09:14:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 09:14:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 09:14:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-07-21 09:14:57,704 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-07-21 09:14:57,704 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-07-21 09:14:57,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-07-21 09:14:57,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:14:57,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-07-21 09:14:57,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 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) [2022-07-21 09:14:57,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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) [2022-07-21 09:14:57,708 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 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) [2022-07-21 09:14:57,708 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-07-21 09:14:57,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-07-21 09:14:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:14:57,710 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-07-21 09:14:57,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-07-21 09:14:57,711 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-07-21 09:14:57,711 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-07-21 09:14:57,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 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) [2022-07-21 09:14:57,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:14:57,712 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] [2022-07-21 09:14:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:14:57,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:14:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:14:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -968534906, now seen corresponding path program 1 times [2022-07-21 09:14:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:14:57,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235920869] [2022-07-21 09:14:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:14:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:14:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235920869] [2022-07-21 09:14:58,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235920869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:14:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341213790] [2022-07-21 09:14:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:14:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:14:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:14:58,179 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) [2022-07-21 09:14:58,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:14:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:14:58,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 09:14:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:14:58,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:14:58,325 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 09:14:58,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-07-21 09:14:58,628 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:14:58,628 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 15 treesize of output 15 [2022-07-21 09:14:58,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 09:14:58,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 09:14:59,034 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 6 treesize of output 5 [2022-07-21 09:14:59,165 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 23 treesize of output 7 [2022-07-21 09:14:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:14:59,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:14:59,818 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:14:59,819 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 60 treesize of output 48 [2022-07-21 09:14:59,827 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:14:59,828 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 140 treesize of output 131 [2022-07-21 09:14:59,835 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:14:59,835 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 124 treesize of output 100 [2022-07-21 09:14:59,844 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 09:14:59,844 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 79 treesize of output 67 [2022-07-21 09:15:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341213790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:00,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:00,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-07-21 09:15:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259208349] [2022-07-21 09:15:00,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:00,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 09:15:00,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 09:15:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1985, Unknown=32, NotChecked=0, Total=2450 [2022-07-21 09:15:00,281 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-21 09:15:00,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 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) [2022-07-21 09:15:00,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:00,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-21 09:15:00,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:02,291 INFO L129 PetriNetUnfolder]: 89/629 cut-off events. [2022-07-21 09:15:02,291 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2022-07-21 09:15:02,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 629 events. 89/629 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3639 event pairs, 0 based on Foata normal form. 4/589 useless extension candidates. Maximal degree in co-relation 1064. Up to 71 conditions per place. [2022-07-21 09:15:02,294 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 114 selfloop transitions, 44 changer transitions 25/225 dead transitions. [2022-07-21 09:15:02,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 964 flow [2022-07-21 09:15:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:15:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:15:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2008 transitions. [2022-07-21 09:15:02,298 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44035087719298244 [2022-07-21 09:15:02,298 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2008 transitions. [2022-07-21 09:15:02,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2008 transitions. [2022-07-21 09:15:02,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:02,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2008 transitions. [2022-07-21 09:15:02,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.8421052631579) internal successors, (2008), 38 states have internal predecessors, (2008), 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) [2022-07-21 09:15:02,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:02,308 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:02,308 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 38 states and 2008 transitions. [2022-07-21 09:15:02,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 964 flow [2022-07-21 09:15:02,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 950 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-21 09:15:02,313 INFO L242 Difference]: Finished difference. Result has 163 places, 139 transitions, 552 flow [2022-07-21 09:15:02,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=552, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2022-07-21 09:15:02,314 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-21 09:15:02,314 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 552 flow [2022-07-21 09:15:02,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 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) [2022-07-21 09:15:02,315 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:02,315 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] [2022-07-21 09:15:02,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 09:15:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:02,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 194607390, now seen corresponding path program 2 times [2022-07-21 09:15:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138783242] [2022-07-21 09:15:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:02,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138783242] [2022-07-21 09:15:02,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138783242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496552850] [2022-07-21 09:15:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:15:02,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:02,910 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) [2022-07-21 09:15:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:15:02,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:15:02,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:15:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:03,321 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 15 treesize of output 11 [2022-07-21 09:15:03,551 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 6 treesize of output 5 [2022-07-21 09:15:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:15:03,684 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 18 treesize of output 20 [2022-07-21 09:15:03,744 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 23 treesize of output 7 [2022-07-21 09:15:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:03,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:03,822 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_98 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_98) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-21 09:15:04,353 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:04,353 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 57 treesize of output 45 [2022-07-21 09:15:04,361 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:04,361 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 100 treesize of output 100 [2022-07-21 09:15:04,365 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 60 treesize of output 48 [2022-07-21 09:15:04,373 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:04,374 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 51 treesize of output 55 [2022-07-21 09:15:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-21 09:15:04,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496552850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:04,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:04,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-07-21 09:15:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406235455] [2022-07-21 09:15:04,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 09:15:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 09:15:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2539, Unknown=11, NotChecked=102, Total=2862 [2022-07-21 09:15:04,852 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-21 09:15:04,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 552 flow. Second operand has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 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) [2022-07-21 09:15:04,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:04,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-21 09:15:04,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:07,153 INFO L129 PetriNetUnfolder]: 178/1123 cut-off events. [2022-07-21 09:15:07,153 INFO L130 PetriNetUnfolder]: For 1080/1088 co-relation queries the response was YES. [2022-07-21 09:15:07,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2315 conditions, 1123 events. 178/1123 cut-off events. For 1080/1088 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8552 event pairs, 5 based on Foata normal form. 12/1045 useless extension candidates. Maximal degree in co-relation 2289. Up to 170 conditions per place. [2022-07-21 09:15:07,161 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 96 selfloop transitions, 85 changer transitions 15/238 dead transitions. [2022-07-21 09:15:07,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 238 transitions, 1432 flow [2022-07-21 09:15:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:15:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:15:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1976 transitions. [2022-07-21 09:15:07,165 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-07-21 09:15:07,166 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1976 transitions. [2022-07-21 09:15:07,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1976 transitions. [2022-07-21 09:15:07,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:07,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1976 transitions. [2022-07-21 09:15:07,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.0) internal successors, (1976), 38 states have internal predecessors, (1976), 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) [2022-07-21 09:15:07,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:07,177 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:07,178 INFO L186 Difference]: Start difference. First operand has 163 places, 139 transitions, 552 flow. Second operand 38 states and 1976 transitions. [2022-07-21 09:15:07,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 238 transitions, 1432 flow [2022-07-21 09:15:07,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 1263 flow, removed 72 selfloop flow, removed 19 redundant places. [2022-07-21 09:15:07,190 INFO L242 Difference]: Finished difference. Result has 184 places, 185 transitions, 1018 flow [2022-07-21 09:15:07,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1018, PETRI_PLACES=184, PETRI_TRANSITIONS=185} [2022-07-21 09:15:07,192 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 77 predicate places. [2022-07-21 09:15:07,192 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 185 transitions, 1018 flow [2022-07-21 09:15:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 states have internal predecessors, (2731), 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) [2022-07-21 09:15:07,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:07,194 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:07,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:07,395 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,SelfDestructingSolverStorable5 [2022-07-21 09:15:07,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 970602436, now seen corresponding path program 3 times [2022-07-21 09:15:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:07,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440073421] [2022-07-21 09:15:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:15:07,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:07,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440073421] [2022-07-21 09:15:07,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440073421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:15:07,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:15:07,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:15:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50978998] [2022-07-21 09:15:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:15:07,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:15:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:15:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:15:07,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-21 09:15:07,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 185 transitions, 1018 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 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) [2022-07-21 09:15:07,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:07,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-21 09:15:07,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:07,563 INFO L129 PetriNetUnfolder]: 124/1041 cut-off events. [2022-07-21 09:15:07,563 INFO L130 PetriNetUnfolder]: For 1657/1721 co-relation queries the response was YES. [2022-07-21 09:15:07,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1041 events. 124/1041 cut-off events. For 1657/1721 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8080 event pairs, 9 based on Foata normal form. 24/978 useless extension candidates. Maximal degree in co-relation 2164. Up to 178 conditions per place. [2022-07-21 09:15:07,570 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 55 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2022-07-21 09:15:07,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 1280 flow [2022-07-21 09:15:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:15:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:15:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2022-07-21 09:15:07,571 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-21 09:15:07,572 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2022-07-21 09:15:07,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2022-07-21 09:15:07,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:07,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2022-07-21 09:15:07,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2022-07-21 09:15:07,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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) [2022-07-21 09:15:07,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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) [2022-07-21 09:15:07,574 INFO L186 Difference]: Start difference. First operand has 184 places, 185 transitions, 1018 flow. Second operand 4 states and 432 transitions. [2022-07-21 09:15:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 1280 flow [2022-07-21 09:15:07,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 1193 flow, removed 20 selfloop flow, removed 26 redundant places. [2022-07-21 09:15:07,582 INFO L242 Difference]: Finished difference. Result has 158 places, 189 transitions, 1108 flow [2022-07-21 09:15:07,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1108, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2022-07-21 09:15:07,582 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 51 predicate places. [2022-07-21 09:15:07,583 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1108 flow [2022-07-21 09:15:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 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) [2022-07-21 09:15:07,583 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:07,583 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:15:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:15:07,584 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -455356886, now seen corresponding path program 4 times [2022-07-21 09:15:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218072561] [2022-07-21 09:15:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 09:15:07,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218072561] [2022-07-21 09:15:07,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218072561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27386441] [2022-07-21 09:15:07,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:15:07,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:07,644 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) [2022-07-21 09:15:07,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:15:07,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:15:07,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 09:15:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:15:07,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:15:07,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27386441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:07,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:07,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:15:07,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356669573] [2022-07-21 09:15:07,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:07,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:15:07,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:15:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:15:07,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-21 09:15:07,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1108 flow. Second operand has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 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) [2022-07-21 09:15:07,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:07,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-21 09:15:07,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:08,127 INFO L129 PetriNetUnfolder]: 45/592 cut-off events. [2022-07-21 09:15:08,128 INFO L130 PetriNetUnfolder]: For 1096/1133 co-relation queries the response was YES. [2022-07-21 09:15:08,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 592 events. 45/592 cut-off events. For 1096/1133 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3467 event pairs, 11 based on Foata normal form. 11/554 useless extension candidates. Maximal degree in co-relation 1210. Up to 103 conditions per place. [2022-07-21 09:15:08,131 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 48 selfloop transitions, 11 changer transitions 21/159 dead transitions. [2022-07-21 09:15:08,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 159 transitions, 917 flow [2022-07-21 09:15:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:15:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:15:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-07-21 09:15:08,133 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7798611111111111 [2022-07-21 09:15:08,134 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-07-21 09:15:08,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-07-21 09:15:08,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:08,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-07-21 09:15:08,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 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) [2022-07-21 09:15:08,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 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) [2022-07-21 09:15:08,138 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 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) [2022-07-21 09:15:08,138 INFO L186 Difference]: Start difference. First operand has 158 places, 189 transitions, 1108 flow. Second operand 12 states and 1123 transitions. [2022-07-21 09:15:08,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 159 transitions, 917 flow [2022-07-21 09:15:08,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 895 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-21 09:15:08,143 INFO L242 Difference]: Finished difference. Result has 163 places, 134 transitions, 632 flow [2022-07-21 09:15:08,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=632, PETRI_PLACES=163, PETRI_TRANSITIONS=134} [2022-07-21 09:15:08,144 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-21 09:15:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 134 transitions, 632 flow [2022-07-21 09:15:08,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 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) [2022-07-21 09:15:08,145 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:08,145 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1] [2022-07-21 09:15:08,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:08,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:08,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -458696651, now seen corresponding path program 5 times [2022-07-21 09:15:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426789674] [2022-07-21 09:15:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:08,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426789674] [2022-07-21 09:15:08,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426789674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:08,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451560153] [2022-07-21 09:15:08,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:15:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:08,802 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) [2022-07-21 09:15:08,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:15:08,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:15:08,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 09:15:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:08,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:15:09,027 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:15:09,027 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 [2022-07-21 09:15:09,532 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 19 treesize of output 21 [2022-07-21 09:15:09,669 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 19 treesize of output 7 [2022-07-21 09:15:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:09,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:09,846 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:09,846 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 42 treesize of output 42 [2022-07-21 09:15:09,849 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 13 treesize of output 7 [2022-07-21 09:15:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:10,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451560153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:10,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:10,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-07-21 09:15:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000218363] [2022-07-21 09:15:10,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:10,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 09:15:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 09:15:10,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 09:15:10,824 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-21 09:15:10,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 134 transitions, 632 flow. Second operand has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 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) [2022-07-21 09:15:10,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:10,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-21 09:15:10,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:14,537 INFO L129 PetriNetUnfolder]: 259/1704 cut-off events. [2022-07-21 09:15:14,537 INFO L130 PetriNetUnfolder]: For 3342/3346 co-relation queries the response was YES. [2022-07-21 09:15:14,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 1704 events. 259/1704 cut-off events. For 3342/3346 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14766 event pairs, 8 based on Foata normal form. 14/1582 useless extension candidates. Maximal degree in co-relation 4061. Up to 213 conditions per place. [2022-07-21 09:15:14,545 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 156 selfloop transitions, 91 changer transitions 49/338 dead transitions. [2022-07-21 09:15:14,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 338 transitions, 2566 flow [2022-07-21 09:15:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-21 09:15:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-21 09:15:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-07-21 09:15:14,549 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.442816091954023 [2022-07-21 09:15:14,550 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-07-21 09:15:14,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-07-21 09:15:14,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:14,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-07-21 09:15:14,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 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) [2022-07-21 09:15:14,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 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) [2022-07-21 09:15:14,561 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 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) [2022-07-21 09:15:14,561 INFO L186 Difference]: Start difference. First operand has 163 places, 134 transitions, 632 flow. Second operand 58 states and 3082 transitions. [2022-07-21 09:15:14,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 338 transitions, 2566 flow [2022-07-21 09:15:14,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 338 transitions, 2402 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-07-21 09:15:14,570 INFO L242 Difference]: Finished difference. Result has 225 places, 195 transitions, 1554 flow [2022-07-21 09:15:14,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1554, PETRI_PLACES=225, PETRI_TRANSITIONS=195} [2022-07-21 09:15:14,571 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 118 predicate places. [2022-07-21 09:15:14,571 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 195 transitions, 1554 flow [2022-07-21 09:15:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 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) [2022-07-21 09:15:14,572 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:14,573 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:14,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:14,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1601581429, now seen corresponding path program 6 times [2022-07-21 09:15:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:14,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509759118] [2022-07-21 09:15:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:15,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509759118] [2022-07-21 09:15:15,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509759118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981337823] [2022-07-21 09:15:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:15:15,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:15,307 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) [2022-07-21 09:15:15,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:15:15,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 09:15:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 09:15:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:15,790 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 15 treesize of output 11 [2022-07-21 09:15:16,036 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 6 treesize of output 5 [2022-07-21 09:15:16,144 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 6 treesize of output 5 [2022-07-21 09:15:16,372 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:16,372 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 23 treesize of output 10 [2022-07-21 09:15:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:16,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:17,262 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:17,263 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 61 treesize of output 49 [2022-07-21 09:15:17,270 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:15:17,271 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 144 treesize of output 136 [2022-07-21 09:15:17,276 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:15:17,276 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 127 treesize of output 101 [2022-07-21 09:15:17,284 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:15:17,284 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 80 treesize of output 67 [2022-07-21 09:15:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:17,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981337823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:17,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:17,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-07-21 09:15:17,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465410312] [2022-07-21 09:15:17,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:17,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-21 09:15:17,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-21 09:15:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3216, Unknown=36, NotChecked=0, Total=3660 [2022-07-21 09:15:17,902 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-21 09:15:17,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 195 transitions, 1554 flow. Second operand has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 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) [2022-07-21 09:15:17,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:17,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-21 09:15:17,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:21,090 INFO L129 PetriNetUnfolder]: 517/2812 cut-off events. [2022-07-21 09:15:21,090 INFO L130 PetriNetUnfolder]: For 13830/13891 co-relation queries the response was YES. [2022-07-21 09:15:21,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8491 conditions, 2812 events. 517/2812 cut-off events. For 13830/13891 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 27202 event pairs, 19 based on Foata normal form. 36/2628 useless extension candidates. Maximal degree in co-relation 8442. Up to 440 conditions per place. [2022-07-21 09:15:21,110 INFO L132 encePairwiseOnDemand]: 87/120 looper letters, 176 selfloop transitions, 140 changer transitions 30/391 dead transitions. [2022-07-21 09:15:21,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 391 transitions, 4023 flow [2022-07-21 09:15:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 09:15:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-21 09:15:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2660 transitions. [2022-07-21 09:15:21,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2022-07-21 09:15:21,114 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2660 transitions. [2022-07-21 09:15:21,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2660 transitions. [2022-07-21 09:15:21,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:21,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2660 transitions. [2022-07-21 09:15:21,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.416666666666664) internal successors, (2660), 48 states have internal predecessors, (2660), 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) [2022-07-21 09:15:21,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 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) [2022-07-21 09:15:21,124 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 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) [2022-07-21 09:15:21,124 INFO L186 Difference]: Start difference. First operand has 225 places, 195 transitions, 1554 flow. Second operand 48 states and 2660 transitions. [2022-07-21 09:15:21,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 391 transitions, 4023 flow [2022-07-21 09:15:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 391 transitions, 3690 flow, removed 147 selfloop flow, removed 31 redundant places. [2022-07-21 09:15:21,148 INFO L242 Difference]: Finished difference. Result has 246 places, 286 transitions, 2961 flow [2022-07-21 09:15:21,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2961, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2022-07-21 09:15:21,149 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 139 predicate places. [2022-07-21 09:15:21,149 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 2961 flow [2022-07-21 09:15:21,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 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) [2022-07-21 09:15:21,150 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:21,151 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:21,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:21,367 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,SelfDestructingSolverStorable9 [2022-07-21 09:15:21,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1615726847, now seen corresponding path program 7 times [2022-07-21 09:15:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:21,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237861273] [2022-07-21 09:15:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:21,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:21,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237861273] [2022-07-21 09:15:21,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237861273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349179729] [2022-07-21 09:15:21,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:15:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:21,769 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) [2022-07-21 09:15:21,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:15:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 09:15:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:22,364 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:22,364 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 23 treesize of output 10 [2022-07-21 09:15:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:22,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:22,447 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:15:22,448 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 25 treesize of output 17 [2022-07-21 09:15:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:23,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349179729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:23,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:23,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-21 09:15:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656702878] [2022-07-21 09:15:23,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:15:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:23,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:15:23,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:15:23,169 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-21 09:15:23,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 2961 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 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) [2022-07-21 09:15:23,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:23,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-21 09:15:23,171 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:26,845 INFO L129 PetriNetUnfolder]: 1034/5302 cut-off events. [2022-07-21 09:15:26,845 INFO L130 PetriNetUnfolder]: For 50600/50832 co-relation queries the response was YES. [2022-07-21 09:15:26,875 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 5302 events. 1034/5302 cut-off events. For 50600/50832 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 58106 event pairs, 4 based on Foata normal form. 93/4996 useless extension candidates. Maximal degree in co-relation 21781. Up to 956 conditions per place. [2022-07-21 09:15:26,897 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 283 selfloop transitions, 288 changer transitions 62/681 dead transitions. [2022-07-21 09:15:26,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 681 transitions, 9896 flow [2022-07-21 09:15:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-21 09:15:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-21 09:15:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4159 transitions. [2022-07-21 09:15:26,902 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5251262626262626 [2022-07-21 09:15:26,902 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4159 transitions. [2022-07-21 09:15:26,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4159 transitions. [2022-07-21 09:15:26,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:26,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4159 transitions. [2022-07-21 09:15:26,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 63.015151515151516) internal successors, (4159), 66 states have internal predecessors, (4159), 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) [2022-07-21 09:15:26,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 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) [2022-07-21 09:15:26,915 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 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) [2022-07-21 09:15:26,915 INFO L186 Difference]: Start difference. First operand has 246 places, 286 transitions, 2961 flow. Second operand 66 states and 4159 transitions. [2022-07-21 09:15:26,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 681 transitions, 9896 flow [2022-07-21 09:15:27,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 681 transitions, 9398 flow, removed 219 selfloop flow, removed 30 redundant places. [2022-07-21 09:15:27,017 INFO L242 Difference]: Finished difference. Result has 308 places, 452 transitions, 6366 flow [2022-07-21 09:15:27,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6366, PETRI_PLACES=308, PETRI_TRANSITIONS=452} [2022-07-21 09:15:27,017 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 201 predicate places. [2022-07-21 09:15:27,017 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 452 transitions, 6366 flow [2022-07-21 09:15:27,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 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) [2022-07-21 09:15:27,018 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:27,018 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:27,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:15:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:27,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2050011769, now seen corresponding path program 8 times [2022-07-21 09:15:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095946137] [2022-07-21 09:15:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095946137] [2022-07-21 09:15:27,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095946137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742465435] [2022-07-21 09:15:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:15:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:27,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:27,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:27,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:15:27,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:15:27,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 09:15:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:28,108 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 15 treesize of output 11 [2022-07-21 09:15:28,321 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 6 treesize of output 5 [2022-07-21 09:15:28,398 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 6 treesize of output 5 [2022-07-21 09:15:28,594 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:28,594 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 23 treesize of output 10 [2022-07-21 09:15:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:28,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:29,407 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:29,408 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 61 treesize of output 49 [2022-07-21 09:15:29,416 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:15:29,416 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 308 treesize of output 283 [2022-07-21 09:15:29,423 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:15:29,424 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 274 treesize of output 248 [2022-07-21 09:15:29,430 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-21 09:15:29,431 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 248 treesize of output 196 [2022-07-21 09:15:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742465435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:30,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:30,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 62 [2022-07-21 09:15:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064091875] [2022-07-21 09:15:30,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:30,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-21 09:15:30,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-21 09:15:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3329, Unknown=40, NotChecked=0, Total=3782 [2022-07-21 09:15:30,049 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-21 09:15:30,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 452 transitions, 6366 flow. Second operand has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 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) [2022-07-21 09:15:30,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:30,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-21 09:15:30,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:33,436 INFO L129 PetriNetUnfolder]: 1322/6904 cut-off events. [2022-07-21 09:15:33,436 INFO L130 PetriNetUnfolder]: For 99079/99400 co-relation queries the response was YES. [2022-07-21 09:15:33,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32509 conditions, 6904 events. 1322/6904 cut-off events. For 99079/99400 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 81888 event pairs, 6 based on Foata normal form. 94/6457 useless extension candidates. Maximal degree in co-relation 32429. Up to 1269 conditions per place. [2022-07-21 09:15:33,512 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 287 selfloop transitions, 413 changer transitions 42/787 dead transitions. [2022-07-21 09:15:33,512 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 787 transitions, 14014 flow [2022-07-21 09:15:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:15:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:15:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2895 transitions. [2022-07-21 09:15:33,516 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2022-07-21 09:15:33,516 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2895 transitions. [2022-07-21 09:15:33,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2895 transitions. [2022-07-21 09:15:33,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:33,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2895 transitions. [2022-07-21 09:15:33,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.67307692307692) internal successors, (2895), 52 states have internal predecessors, (2895), 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) [2022-07-21 09:15:33,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 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) [2022-07-21 09:15:33,527 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 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) [2022-07-21 09:15:33,527 INFO L186 Difference]: Start difference. First operand has 308 places, 452 transitions, 6366 flow. Second operand 52 states and 2895 transitions. [2022-07-21 09:15:33,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 787 transitions, 14014 flow [2022-07-21 09:15:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 787 transitions, 12869 flow, removed 538 selfloop flow, removed 35 redundant places. [2022-07-21 09:15:33,824 INFO L242 Difference]: Finished difference. Result has 331 places, 624 transitions, 10240 flow [2022-07-21 09:15:33,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10240, PETRI_PLACES=331, PETRI_TRANSITIONS=624} [2022-07-21 09:15:33,825 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 224 predicate places. [2022-07-21 09:15:33,825 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 624 transitions, 10240 flow [2022-07-21 09:15:33,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 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) [2022-07-21 09:15:33,826 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:33,826 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:33,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:34,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:34,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:34,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash 122552891, now seen corresponding path program 9 times [2022-07-21 09:15:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:34,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131530474] [2022-07-21 09:15:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:34,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131530474] [2022-07-21 09:15:34,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131530474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981985832] [2022-07-21 09:15:34,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:15:34,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:34,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:34,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:34,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:15:34,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:15:34,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 09:15:34,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:34,756 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:34,758 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 23 treesize of output 10 [2022-07-21 09:15:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:15:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:34,940 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-21 09:15:34,940 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 24 treesize of output 15 [2022-07-21 09:15:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:15:35,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981985832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:35,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:35,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 9] total 30 [2022-07-21 09:15:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457378483] [2022-07-21 09:15:35,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 09:15:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 09:15:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:15:35,076 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-21 09:15:35,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 624 transitions, 10240 flow. Second operand has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 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) [2022-07-21 09:15:35,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:35,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-21 09:15:35,078 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:38,072 INFO L129 PetriNetUnfolder]: 1864/9791 cut-off events. [2022-07-21 09:15:38,072 INFO L130 PetriNetUnfolder]: For 174955/175607 co-relation queries the response was YES. [2022-07-21 09:15:38,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49603 conditions, 9791 events. 1864/9791 cut-off events. For 174955/175607 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 125621 event pairs, 76 based on Foata normal form. 92/9113 useless extension candidates. Maximal degree in co-relation 49517. Up to 2413 conditions per place. [2022-07-21 09:15:38,171 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 538 selfloop transitions, 339 changer transitions 65/990 dead transitions. [2022-07-21 09:15:38,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 990 transitions, 19122 flow [2022-07-21 09:15:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:15:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:15:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2915 transitions. [2022-07-21 09:15:38,174 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5168439716312057 [2022-07-21 09:15:38,174 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2915 transitions. [2022-07-21 09:15:38,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2915 transitions. [2022-07-21 09:15:38,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:38,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2915 transitions. [2022-07-21 09:15:38,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 62.02127659574468) internal successors, (2915), 47 states have internal predecessors, (2915), 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) [2022-07-21 09:15:38,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 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) [2022-07-21 09:15:38,184 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 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) [2022-07-21 09:15:38,184 INFO L186 Difference]: Start difference. First operand has 331 places, 624 transitions, 10240 flow. Second operand 47 states and 2915 transitions. [2022-07-21 09:15:38,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 990 transitions, 19122 flow [2022-07-21 09:15:38,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 990 transitions, 18236 flow, removed 388 selfloop flow, removed 32 redundant places. [2022-07-21 09:15:38,833 INFO L242 Difference]: Finished difference. Result has 363 places, 849 transitions, 15638 flow [2022-07-21 09:15:38,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9769, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15638, PETRI_PLACES=363, PETRI_TRANSITIONS=849} [2022-07-21 09:15:38,834 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 256 predicate places. [2022-07-21 09:15:38,834 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 849 transitions, 15638 flow [2022-07-21 09:15:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 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) [2022-07-21 09:15:38,835 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:38,835 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:38,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:39,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:15:39,054 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:39,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1652157435, now seen corresponding path program 10 times [2022-07-21 09:15:39,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:39,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634477461] [2022-07-21 09:15:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:39,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:39,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634477461] [2022-07-21 09:15:39,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634477461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078429780] [2022-07-21 09:15:39,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:15:39,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:39,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:39,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:15:39,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:15:39,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 09:15:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:40,005 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:40,006 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 23 treesize of output 10 [2022-07-21 09:15:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:40,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:40,089 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:15:40,090 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 25 treesize of output 17 [2022-07-21 09:15:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:40,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078429780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:40,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-21 09:15:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169548609] [2022-07-21 09:15:40,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 09:15:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 09:15:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 09:15:40,549 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-21 09:15:40,567 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 849 transitions, 15638 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 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) [2022-07-21 09:15:40,567 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:40,568 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-21 09:15:40,568 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:48,095 INFO L129 PetriNetUnfolder]: 3300/16834 cut-off events. [2022-07-21 09:15:48,095 INFO L130 PetriNetUnfolder]: For 465858/466988 co-relation queries the response was YES. [2022-07-21 09:15:48,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101923 conditions, 16834 events. 3300/16834 cut-off events. For 465858/466988 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 231849 event pairs, 12 based on Foata normal form. 308/15862 useless extension candidates. Maximal degree in co-relation 101821. Up to 2711 conditions per place. [2022-07-21 09:15:48,297 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 621 selfloop transitions, 877 changer transitions 114/1660 dead transitions. [2022-07-21 09:15:48,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1660 transitions, 37553 flow [2022-07-21 09:15:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:15:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:15:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4404 transitions. [2022-07-21 09:15:48,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2022-07-21 09:15:48,301 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4404 transitions. [2022-07-21 09:15:48,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4404 transitions. [2022-07-21 09:15:48,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:48,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4404 transitions. [2022-07-21 09:15:48,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 62.91428571428571) internal successors, (4404), 70 states have internal predecessors, (4404), 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) [2022-07-21 09:15:48,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 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) [2022-07-21 09:15:48,314 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 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) [2022-07-21 09:15:48,314 INFO L186 Difference]: Start difference. First operand has 363 places, 849 transitions, 15638 flow. Second operand 70 states and 4404 transitions. [2022-07-21 09:15:48,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1660 transitions, 37553 flow [2022-07-21 09:15:50,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1660 transitions, 36524 flow, removed 487 selfloop flow, removed 27 redundant places. [2022-07-21 09:15:50,326 INFO L242 Difference]: Finished difference. Result has 430 places, 1244 transitions, 27398 flow [2022-07-21 09:15:50,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=15291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=27398, PETRI_PLACES=430, PETRI_TRANSITIONS=1244} [2022-07-21 09:15:50,328 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 323 predicate places. [2022-07-21 09:15:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1244 transitions, 27398 flow [2022-07-21 09:15:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 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) [2022-07-21 09:15:50,328 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:15:50,329 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-21 09:15:50,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:15:50,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:15:50,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:15:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:15:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1495727277, now seen corresponding path program 11 times [2022-07-21 09:15:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:15:50,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749588260] [2022-07-21 09:15:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:15:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:15:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:15:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:15:50,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:15:50,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749588260] [2022-07-21 09:15:50,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749588260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:15:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797519866] [2022-07-21 09:15:50,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:15:50,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:15:50,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:15:50,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:15:50,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:15:50,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 09:15:50,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:15:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 09:15:50,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:15:50,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:15:51,070 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:15:51,070 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 [2022-07-21 09:15:51,350 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 18 treesize of output 20 [2022-07-21 09:15:51,545 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:15:51,546 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 23 treesize of output 10 [2022-07-21 09:15:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:15:51,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:15:51,635 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_342 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-21 09:15:51,657 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:15:51,657 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 44 treesize of output 44 [2022-07-21 09:15:51,660 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 14 treesize of output 7 [2022-07-21 09:15:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:15:52,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797519866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:15:52,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:15:52,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 39 [2022-07-21 09:15:52,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691579130] [2022-07-21 09:15:52,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:15:52,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 09:15:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:15:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 09:15:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1304, Unknown=1, NotChecked=72, Total=1482 [2022-07-21 09:15:52,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-07-21 09:15:52,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1244 transitions, 27398 flow. Second operand has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 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) [2022-07-21 09:15:52,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:15:52,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-07-21 09:15:52,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:15:59,512 INFO L129 PetriNetUnfolder]: 3683/18623 cut-off events. [2022-07-21 09:15:59,513 INFO L130 PetriNetUnfolder]: For 574379/575886 co-relation queries the response was YES. [2022-07-21 09:15:59,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119929 conditions, 18623 events. 3683/18623 cut-off events. For 574379/575886 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 261848 event pairs, 289 based on Foata normal form. 187/17340 useless extension candidates. Maximal degree in co-relation 119798. Up to 6830 conditions per place. [2022-07-21 09:15:59,964 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 1172 selfloop transitions, 262 changer transitions 30/1507 dead transitions. [2022-07-21 09:15:59,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1507 transitions, 36498 flow [2022-07-21 09:15:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 09:15:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-21 09:15:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2059 transitions. [2022-07-21 09:15:59,967 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45153508771929823 [2022-07-21 09:15:59,967 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2059 transitions. [2022-07-21 09:15:59,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2059 transitions. [2022-07-21 09:15:59,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:15:59,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2059 transitions. [2022-07-21 09:15:59,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 54.18421052631579) internal successors, (2059), 38 states have internal predecessors, (2059), 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) [2022-07-21 09:15:59,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:59,973 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 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) [2022-07-21 09:15:59,973 INFO L186 Difference]: Start difference. First operand has 430 places, 1244 transitions, 27398 flow. Second operand 38 states and 2059 transitions. [2022-07-21 09:15:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1507 transitions, 36498 flow [2022-07-21 09:16:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1507 transitions, 35356 flow, removed 509 selfloop flow, removed 38 redundant places. [2022-07-21 09:16:02,395 INFO L242 Difference]: Finished difference. Result has 425 places, 1369 transitions, 30467 flow [2022-07-21 09:16:02,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=26475, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=984, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=30467, PETRI_PLACES=425, PETRI_TRANSITIONS=1369} [2022-07-21 09:16:02,396 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 318 predicate places. [2022-07-21 09:16:02,396 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1369 transitions, 30467 flow [2022-07-21 09:16:02,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 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) [2022-07-21 09:16:02,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:02,397 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-21 09:16:02,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:02,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:16:02,597 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash 730214897, now seen corresponding path program 12 times [2022-07-21 09:16:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:02,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219715652] [2022-07-21 09:16:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:16:02,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219715652] [2022-07-21 09:16:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219715652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976501273] [2022-07-21 09:16:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:16:02,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:02,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:02,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:16:02,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:16:02,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 09:16:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:16:02,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 09:16:03,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976501273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:03,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:03,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-21 09:16:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828189986] [2022-07-21 09:16:03,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:03,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 09:16:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 09:16:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:16:03,167 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-21 09:16:03,168 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1369 transitions, 30467 flow. Second operand has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 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) [2022-07-21 09:16:03,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:03,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-21 09:16:03,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:04,974 INFO L129 PetriNetUnfolder]: 827/5656 cut-off events. [2022-07-21 09:16:04,974 INFO L130 PetriNetUnfolder]: For 163954/164737 co-relation queries the response was YES. [2022-07-21 09:16:05,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 5656 events. 827/5656 cut-off events. For 163954/164737 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 68952 event pairs, 84 based on Foata normal form. 157/5287 useless extension candidates. Maximal degree in co-relation 32094. Up to 1241 conditions per place. [2022-07-21 09:16:05,046 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 396 selfloop transitions, 23 changer transitions 19/550 dead transitions. [2022-07-21 09:16:05,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 550 transitions, 11756 flow [2022-07-21 09:16:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:16:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:16:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1493 transitions. [2022-07-21 09:16:05,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7776041666666667 [2022-07-21 09:16:05,048 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1493 transitions. [2022-07-21 09:16:05,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1493 transitions. [2022-07-21 09:16:05,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:05,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1493 transitions. [2022-07-21 09:16:05,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.3125) internal successors, (1493), 16 states have internal predecessors, (1493), 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) [2022-07-21 09:16:05,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 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) [2022-07-21 09:16:05,051 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 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) [2022-07-21 09:16:05,051 INFO L186 Difference]: Start difference. First operand has 425 places, 1369 transitions, 30467 flow. Second operand 16 states and 1493 transitions. [2022-07-21 09:16:05,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 550 transitions, 11756 flow [2022-07-21 09:16:05,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 550 transitions, 10827 flow, removed 260 selfloop flow, removed 64 redundant places. [2022-07-21 09:16:05,551 INFO L242 Difference]: Finished difference. Result has 345 places, 517 transitions, 9316 flow [2022-07-21 09:16:05,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9316, PETRI_PLACES=345, PETRI_TRANSITIONS=517} [2022-07-21 09:16:05,552 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 238 predicate places. [2022-07-21 09:16:05,552 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 517 transitions, 9316 flow [2022-07-21 09:16:05,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 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) [2022-07-21 09:16:05,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:05,553 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-21 09:16:05,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:16:05,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -87345653, now seen corresponding path program 13 times [2022-07-21 09:16:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:05,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644613718] [2022-07-21 09:16:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:05,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 09:16:05,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:05,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644613718] [2022-07-21 09:16:05,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644613718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:05,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836151172] [2022-07-21 09:16:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:16:05,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:05,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:05,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:16:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 09:16:05,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:06,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:06,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836151172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:06,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:06,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 29 [2022-07-21 09:16:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343825022] [2022-07-21 09:16:06,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:06,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 09:16:06,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 09:16:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-07-21 09:16:06,511 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-07-21 09:16:06,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 517 transitions, 9316 flow. Second operand has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 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) [2022-07-21 09:16:06,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:06,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-07-21 09:16:06,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:08,049 INFO L129 PetriNetUnfolder]: 796/6156 cut-off events. [2022-07-21 09:16:08,050 INFO L130 PetriNetUnfolder]: For 143453/144327 co-relation queries the response was YES. [2022-07-21 09:16:08,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 6156 events. 796/6156 cut-off events. For 143453/144327 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 77082 event pairs, 85 based on Foata normal form. 378/5979 useless extension candidates. Maximal degree in co-relation 31641. Up to 888 conditions per place. [2022-07-21 09:16:08,108 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 164 selfloop transitions, 189 changer transitions 115/559 dead transitions. [2022-07-21 09:16:08,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 11473 flow [2022-07-21 09:16:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 09:16:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-21 09:16:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2276 transitions. [2022-07-21 09:16:08,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586666666666667 [2022-07-21 09:16:08,111 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2276 transitions. [2022-07-21 09:16:08,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2276 transitions. [2022-07-21 09:16:08,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:08,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2276 transitions. [2022-07-21 09:16:08,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.04) internal successors, (2276), 25 states have internal predecessors, (2276), 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) [2022-07-21 09:16:08,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 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) [2022-07-21 09:16:08,115 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 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) [2022-07-21 09:16:08,115 INFO L186 Difference]: Start difference. First operand has 345 places, 517 transitions, 9316 flow. Second operand 25 states and 2276 transitions. [2022-07-21 09:16:08,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 11473 flow [2022-07-21 09:16:08,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 559 transitions, 11234 flow, removed 49 selfloop flow, removed 22 redundant places. [2022-07-21 09:16:08,485 INFO L242 Difference]: Finished difference. Result has 346 places, 424 transitions, 8648 flow [2022-07-21 09:16:08,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8648, PETRI_PLACES=346, PETRI_TRANSITIONS=424} [2022-07-21 09:16:08,485 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 239 predicate places. [2022-07-21 09:16:08,485 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 424 transitions, 8648 flow [2022-07-21 09:16:08,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 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) [2022-07-21 09:16:08,486 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:08,486 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-07-21 09:16:08,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:16:08,686 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash -78433764, now seen corresponding path program 14 times [2022-07-21 09:16:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986183903] [2022-07-21 09:16:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986183903] [2022-07-21 09:16:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986183903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288696959] [2022-07-21 09:16:09,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:16:09,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:09,423 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:09,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:16:09,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:16:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 09:16:09,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:10,299 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 19 treesize of output 21 [2022-07-21 09:16:10,391 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-21 09:16:10,391 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 24 treesize of output 10 [2022-07-21 09:16:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:10,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:10,462 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_431 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_431) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-21 09:16:10,527 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:10,527 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 42 treesize of output 42 [2022-07-21 09:16:10,531 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 13 treesize of output 7 [2022-07-21 09:16:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:11,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288696959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:11,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:11,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-21 09:16:11,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807697218] [2022-07-21 09:16:11,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-21 09:16:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-21 09:16:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3486, Unknown=7, NotChecked=120, Total=3906 [2022-07-21 09:16:11,630 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-21 09:16:11,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 424 transitions, 8648 flow. Second operand has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 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) [2022-07-21 09:16:11,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:11,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-21 09:16:11,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:17,709 INFO L129 PetriNetUnfolder]: 1595/10117 cut-off events. [2022-07-21 09:16:17,710 INFO L130 PetriNetUnfolder]: For 258183/258915 co-relation queries the response was YES. [2022-07-21 09:16:17,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58801 conditions, 10117 events. 1595/10117 cut-off events. For 258183/258915 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136960 event pairs, 80 based on Foata normal form. 198/9454 useless extension candidates. Maximal degree in co-relation 58704. Up to 2097 conditions per place. [2022-07-21 09:16:17,815 INFO L132 encePairwiseOnDemand]: 92/120 looper letters, 459 selfloop transitions, 368 changer transitions 75/947 dead transitions. [2022-07-21 09:16:17,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 947 transitions, 23371 flow [2022-07-21 09:16:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 09:16:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 09:16:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3428 transitions. [2022-07-21 09:16:17,819 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4761111111111111 [2022-07-21 09:16:17,819 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3428 transitions. [2022-07-21 09:16:17,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3428 transitions. [2022-07-21 09:16:17,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:17,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3428 transitions. [2022-07-21 09:16:17,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.13333333333333) internal successors, (3428), 60 states have internal predecessors, (3428), 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) [2022-07-21 09:16:17,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 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) [2022-07-21 09:16:17,827 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 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) [2022-07-21 09:16:17,827 INFO L186 Difference]: Start difference. First operand has 346 places, 424 transitions, 8648 flow. Second operand 60 states and 3428 transitions. [2022-07-21 09:16:17,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 947 transitions, 23371 flow [2022-07-21 09:16:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 947 transitions, 21425 flow, removed 908 selfloop flow, removed 46 redundant places. [2022-07-21 09:16:18,655 INFO L242 Difference]: Finished difference. Result has 347 places, 738 transitions, 17704 flow [2022-07-21 09:16:18,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17704, PETRI_PLACES=347, PETRI_TRANSITIONS=738} [2022-07-21 09:16:18,655 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 240 predicate places. [2022-07-21 09:16:18,655 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 738 transitions, 17704 flow [2022-07-21 09:16:18,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 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) [2022-07-21 09:16:18,656 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:18,656 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-07-21 09:16:18,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-21 09:16:18,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:16:18,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:18,857 INFO L85 PathProgramCache]: Analyzing trace with hash -102659002, now seen corresponding path program 15 times [2022-07-21 09:16:18,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:18,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593134384] [2022-07-21 09:16:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:18,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:19,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593134384] [2022-07-21 09:16:19,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593134384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:19,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467280721] [2022-07-21 09:16:19,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:16:19,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:19,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:19,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:19,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:16:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:16:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 09:16:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 09:16:20,052 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 18 treesize of output 20 [2022-07-21 09:16:20,089 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 23 treesize of output 7 [2022-07-21 09:16:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:20,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:20,125 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-21 09:16:20,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:20,142 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 42 treesize of output 42 [2022-07-21 09:16:20,145 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 13 treesize of output 7 [2022-07-21 09:16:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2022-07-21 09:16:20,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467280721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:20,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:20,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 41 [2022-07-21 09:16:20,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670519227] [2022-07-21 09:16:20,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:20,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 09:16:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 09:16:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1451, Unknown=1, NotChecked=76, Total=1640 [2022-07-21 09:16:20,474 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-21 09:16:20,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 738 transitions, 17704 flow. Second operand has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 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) [2022-07-21 09:16:20,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:20,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-21 09:16:20,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:25,245 INFO L129 PetriNetUnfolder]: 1596/9925 cut-off events. [2022-07-21 09:16:25,245 INFO L130 PetriNetUnfolder]: For 228129/229163 co-relation queries the response was YES. [2022-07-21 09:16:25,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55756 conditions, 9925 events. 1596/9925 cut-off events. For 228129/229163 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 133271 event pairs, 156 based on Foata normal form. 206/9292 useless extension candidates. Maximal degree in co-relation 55648. Up to 3464 conditions per place. [2022-07-21 09:16:25,372 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 600 selfloop transitions, 192 changer transitions 23/860 dead transitions. [2022-07-21 09:16:25,372 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 860 transitions, 22147 flow [2022-07-21 09:16:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 09:16:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-21 09:16:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2431 transitions. [2022-07-21 09:16:25,375 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47112403100775196 [2022-07-21 09:16:25,375 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2431 transitions. [2022-07-21 09:16:25,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2431 transitions. [2022-07-21 09:16:25,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:25,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2431 transitions. [2022-07-21 09:16:25,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.53488372093023) internal successors, (2431), 43 states have internal predecessors, (2431), 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) [2022-07-21 09:16:25,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 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) [2022-07-21 09:16:25,381 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 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) [2022-07-21 09:16:25,381 INFO L186 Difference]: Start difference. First operand has 347 places, 738 transitions, 17704 flow. Second operand 43 states and 2431 transitions. [2022-07-21 09:16:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 860 transitions, 22147 flow [2022-07-21 09:16:26,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 860 transitions, 21256 flow, removed 422 selfloop flow, removed 30 redundant places. [2022-07-21 09:16:26,202 INFO L242 Difference]: Finished difference. Result has 355 places, 806 transitions, 19492 flow [2022-07-21 09:16:26,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16875, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=19492, PETRI_PLACES=355, PETRI_TRANSITIONS=806} [2022-07-21 09:16:26,203 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 248 predicate places. [2022-07-21 09:16:26,203 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 806 transitions, 19492 flow [2022-07-21 09:16:26,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 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) [2022-07-21 09:16:26,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:26,204 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:16:26,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:26,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:26,419 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:26,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1102779316, now seen corresponding path program 16 times [2022-07-21 09:16:26,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:26,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490625002] [2022-07-21 09:16:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:26,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490625002] [2022-07-21 09:16:26,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490625002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:26,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860377755] [2022-07-21 09:16:26,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:16:26,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:26,974 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:26,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:16:27,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:16:27,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-21 09:16:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:27,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:16:27,184 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:16:27,184 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 [2022-07-21 09:16:27,829 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 18 treesize of output 20 [2022-07-21 09:16:27,957 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 15 treesize of output 7 [2022-07-21 09:16:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:27,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:28,185 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:28,185 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 42 treesize of output 42 [2022-07-21 09:16:28,188 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 13 treesize of output 7 [2022-07-21 09:16:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:29,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860377755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:29,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:29,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2022-07-21 09:16:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109808858] [2022-07-21 09:16:29,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:29,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 09:16:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 09:16:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=4133, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 09:16:29,321 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-21 09:16:29,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 806 transitions, 19492 flow. Second operand has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 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) [2022-07-21 09:16:29,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:29,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-21 09:16:29,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:38,971 INFO L129 PetriNetUnfolder]: 2723/16382 cut-off events. [2022-07-21 09:16:38,972 INFO L130 PetriNetUnfolder]: For 377159/378448 co-relation queries the response was YES. [2022-07-21 09:16:39,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90372 conditions, 16382 events. 2723/16382 cut-off events. For 377159/378448 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 238058 event pairs, 121 based on Foata normal form. 461/15466 useless extension candidates. Maximal degree in co-relation 90268. Up to 2713 conditions per place. [2022-07-21 09:16:39,185 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 734 selfloop transitions, 616 changer transitions 103/1495 dead transitions. [2022-07-21 09:16:39,185 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1495 transitions, 38525 flow [2022-07-21 09:16:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-21 09:16:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-21 09:16:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4301 transitions. [2022-07-21 09:16:39,189 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44248971193415637 [2022-07-21 09:16:39,189 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4301 transitions. [2022-07-21 09:16:39,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4301 transitions. [2022-07-21 09:16:39,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:39,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4301 transitions. [2022-07-21 09:16:39,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 53.098765432098766) internal successors, (4301), 81 states have internal predecessors, (4301), 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) [2022-07-21 09:16:39,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 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) [2022-07-21 09:16:39,302 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 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) [2022-07-21 09:16:39,302 INFO L186 Difference]: Start difference. First operand has 355 places, 806 transitions, 19492 flow. Second operand 81 states and 4301 transitions. [2022-07-21 09:16:39,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1495 transitions, 38525 flow [2022-07-21 09:16:40,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1495 transitions, 38150 flow, removed 148 selfloop flow, removed 30 redundant places. [2022-07-21 09:16:40,571 INFO L242 Difference]: Finished difference. Result has 447 places, 1087 transitions, 29578 flow [2022-07-21 09:16:40,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=19279, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=29578, PETRI_PLACES=447, PETRI_TRANSITIONS=1087} [2022-07-21 09:16:40,572 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 340 predicate places. [2022-07-21 09:16:40,572 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1087 transitions, 29578 flow [2022-07-21 09:16:40,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 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) [2022-07-21 09:16:40,573 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:40,573 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:16:40,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:40,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:40,787 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:40,788 INFO L85 PathProgramCache]: Analyzing trace with hash 458708590, now seen corresponding path program 17 times [2022-07-21 09:16:40,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:40,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930584846] [2022-07-21 09:16:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:40,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:41,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930584846] [2022-07-21 09:16:41,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930584846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:41,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063296903] [2022-07-21 09:16:41,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:16:41,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:41,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:41,373 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:41,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:16:41,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:16:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:41,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 09:16:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:41,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-07-21 09:16:41,541 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:16:41,542 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 [2022-07-21 09:16:41,807 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 19 treesize of output 21 [2022-07-21 09:16:41,868 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 23 treesize of output 7 [2022-07-21 09:16:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 09:16:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:41,905 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_532) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-21 09:16:41,917 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 09:16:41,918 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 44 treesize of output 44 [2022-07-21 09:16:41,921 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 14 treesize of output 7 [2022-07-21 09:16:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 09:16:42,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063296903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:42,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:42,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 16] total 43 [2022-07-21 09:16:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14937502] [2022-07-21 09:16:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:42,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 09:16:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 09:16:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1605, Unknown=1, NotChecked=80, Total=1806 [2022-07-21 09:16:42,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-21 09:16:42,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1087 transitions, 29578 flow. Second operand has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 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) [2022-07-21 09:16:42,302 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:42,302 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-21 09:16:42,302 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:16:51,780 INFO L129 PetriNetUnfolder]: 3628/21792 cut-off events. [2022-07-21 09:16:51,780 INFO L130 PetriNetUnfolder]: For 670482/672384 co-relation queries the response was YES. [2022-07-21 09:16:52,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134037 conditions, 21792 events. 3628/21792 cut-off events. For 670482/672384 co-relation queries the response was YES. Maximal size of possible extension queue 1393. Compared 330613 event pairs, 119 based on Foata normal form. 561/20544 useless extension candidates. Maximal degree in co-relation 133890. Up to 3788 conditions per place. [2022-07-21 09:16:52,257 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 996 selfloop transitions, 635 changer transitions 76/1749 dead transitions. [2022-07-21 09:16:52,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1749 transitions, 49876 flow [2022-07-21 09:16:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-21 09:16:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-21 09:16:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3172 transitions. [2022-07-21 09:16:52,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44055555555555553 [2022-07-21 09:16:52,260 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3172 transitions. [2022-07-21 09:16:52,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3172 transitions. [2022-07-21 09:16:52,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:16:52,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3172 transitions. [2022-07-21 09:16:52,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.86666666666667) internal successors, (3172), 60 states have internal predecessors, (3172), 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) [2022-07-21 09:16:52,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 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) [2022-07-21 09:16:52,268 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 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) [2022-07-21 09:16:52,268 INFO L186 Difference]: Start difference. First operand has 447 places, 1087 transitions, 29578 flow. Second operand 60 states and 3172 transitions. [2022-07-21 09:16:52,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1749 transitions, 49876 flow [2022-07-21 09:16:55,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1749 transitions, 47648 flow, removed 1069 selfloop flow, removed 55 redundant places. [2022-07-21 09:16:55,183 INFO L242 Difference]: Finished difference. Result has 454 places, 1336 transitions, 38424 flow [2022-07-21 09:16:55,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=28350, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=38424, PETRI_PLACES=454, PETRI_TRANSITIONS=1336} [2022-07-21 09:16:55,184 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 347 predicate places. [2022-07-21 09:16:55,184 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1336 transitions, 38424 flow [2022-07-21 09:16:55,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 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) [2022-07-21 09:16:55,185 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:16:55,185 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:16:55,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:16:55,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:55,385 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:16:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:16:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash -326418292, now seen corresponding path program 18 times [2022-07-21 09:16:55,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:16:55,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114568132] [2022-07-21 09:16:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:16:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:16:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:16:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:55,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:16:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114568132] [2022-07-21 09:16:55,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114568132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:16:55,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35832086] [2022-07-21 09:16:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:16:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:16:55,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:16:55,821 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:16:55,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:16:56,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:16:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:16:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 09:16:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:16:56,807 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:16:56,807 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 23 treesize of output 10 [2022-07-21 09:16:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:56,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:16:56,936 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:16:56,936 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 25 treesize of output 17 [2022-07-21 09:16:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:16:57,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35832086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:16:57,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:16:57,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 54 [2022-07-21 09:16:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498604275] [2022-07-21 09:16:57,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:16:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 09:16:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:16:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 09:16:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2523, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 09:16:57,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-21 09:16:57,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1336 transitions, 38424 flow. Second operand has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 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) [2022-07-21 09:16:57,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:16:57,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-21 09:16:57,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:17:15,792 INFO L129 PetriNetUnfolder]: 5955/33390 cut-off events. [2022-07-21 09:17:15,792 INFO L130 PetriNetUnfolder]: For 1177332/1181149 co-relation queries the response was YES. [2022-07-21 09:17:16,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216541 conditions, 33390 events. 5955/33390 cut-off events. For 1177332/1181149 co-relation queries the response was YES. Maximal size of possible extension queue 2052. Compared 530905 event pairs, 207 based on Foata normal form. 863/31536 useless extension candidates. Maximal degree in co-relation 216391. Up to 6066 conditions per place. [2022-07-21 09:17:16,511 INFO L132 encePairwiseOnDemand]: 88/120 looper letters, 985 selfloop transitions, 1703 changer transitions 75/2811 dead transitions. [2022-07-21 09:17:16,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 2811 transitions, 86304 flow [2022-07-21 09:17:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-21 09:17:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-21 09:17:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5692 transitions. [2022-07-21 09:17:16,515 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5212454212454213 [2022-07-21 09:17:16,515 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5692 transitions. [2022-07-21 09:17:16,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5692 transitions. [2022-07-21 09:17:16,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:17:16,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5692 transitions. [2022-07-21 09:17:16,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 62.54945054945055) internal successors, (5692), 91 states have internal predecessors, (5692), 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) [2022-07-21 09:17:16,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 120.0) internal successors, (11040), 92 states have internal predecessors, (11040), 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) [2022-07-21 09:17:16,526 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 120.0) internal successors, (11040), 92 states have internal predecessors, (11040), 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) [2022-07-21 09:17:16,527 INFO L186 Difference]: Start difference. First operand has 454 places, 1336 transitions, 38424 flow. Second operand 91 states and 5692 transitions. [2022-07-21 09:17:16,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 2811 transitions, 86304 flow [2022-07-21 09:17:22,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 2811 transitions, 84584 flow, removed 792 selfloop flow, removed 43 redundant places. [2022-07-21 09:17:22,360 INFO L242 Difference]: Finished difference. Result has 541 places, 2454 transitions, 77778 flow [2022-07-21 09:17:22,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=37665, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=756, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=77778, PETRI_PLACES=541, PETRI_TRANSITIONS=2454} [2022-07-21 09:17:22,362 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 434 predicate places. [2022-07-21 09:17:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 2454 transitions, 77778 flow [2022-07-21 09:17:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 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) [2022-07-21 09:17:22,363 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:17:22,363 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-21 09:17:22,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:17:22,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:22,579 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:17:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:17:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1838320222, now seen corresponding path program 19 times [2022-07-21 09:17:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:17:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953021715] [2022-07-21 09:17:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:17:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:17:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:22,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:17:22,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953021715] [2022-07-21 09:17:22,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953021715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:17:22,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405917050] [2022-07-21 09:17:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:17:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:17:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:17:22,975 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:17:22,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:17:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:17:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 09:17:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:17:23,767 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-21 09:17:23,767 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 23 treesize of output 10 [2022-07-21 09:17:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:23,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:17:23,895 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-21 09:17:23,895 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 25 treesize of output 17 [2022-07-21 09:17:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:17:24,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405917050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:17:24,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:17:24,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 54 [2022-07-21 09:17:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323007501] [2022-07-21 09:17:24,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:17:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 09:17:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:17:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 09:17:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 09:17:24,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-21 09:17:24,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 2454 transitions, 77778 flow. Second operand has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 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) [2022-07-21 09:17:24,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:17:24,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-21 09:17:24,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand