./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:31:28,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:31:28,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:31:28,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:31:28,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:31:28,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:31:28,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:31:28,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:31:28,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:31:28,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:31:28,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:31:28,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:31:28,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:31:28,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:31:28,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:31:28,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:31:28,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:31:28,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:31:28,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:31:28,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:31:28,765 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:31:28,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:31:28,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:31:28,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:31:28,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:31:28,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:31:28,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:31:28,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:31:28,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:31:28,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:31:28,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:31:28,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:31:28,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:31:28,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:31:28,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:31:28,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:31:28,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:31:28,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:31:28,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:31:28,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:31:28,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:31:28,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:31:28,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:31:28,810 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:31:28,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:31:28,811 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:31:28,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:31:28,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:31:28,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:31:28,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:31:28,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:31:28,813 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:31:28,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:31:28,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:31:28,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:31:28,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:31:28,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:31:28,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:31:28,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:31:28,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:31:28,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:31:28,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:31:28,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:28,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:31:28,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:31:28,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:31:28,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:31:28,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:31:28,820 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:31:28,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:31:28,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:31:28,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-07-12 10:31:29,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:31:29,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:31:29,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:31:29,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:31:29,095 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:31:29,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-12 10:31:29,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba63b6554/9708eea1dd9d4fc7a905d5c6974bf405/FLAG75bc114c5 [2022-07-12 10:31:29,597 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:31:29,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-07-12 10:31:29,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba63b6554/9708eea1dd9d4fc7a905d5c6974bf405/FLAG75bc114c5 [2022-07-12 10:31:29,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba63b6554/9708eea1dd9d4fc7a905d5c6974bf405 [2022-07-12 10:31:29,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:31:29,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:31:29,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:29,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:31:29,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:31:29,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c29bb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29, skipping insertion in model container [2022-07-12 10:31:29,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:31:29,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:31:29,833 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-figure3.wvr.c[2121,2134] [2022-07-12 10:31:29,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:29,843 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:31:29,878 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-figure3.wvr.c[2121,2134] [2022-07-12 10:31:29,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:31:29,893 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:31:29,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29 WrapperNode [2022-07-12 10:31:29,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:31:29,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:29,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:31:29,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:31:29,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,931 INFO L137 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-07-12 10:31:29,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:31:29,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:31:29,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:31:29,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:31:29,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:31:29,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:31:29,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:31:29,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:31:29,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (1/1) ... [2022-07-12 10:31:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:31:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:30,009 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) [2022-07-12 10:31:30,033 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 [2022-07-12 10:31:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:31:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:31:30,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:31:30,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:31:30,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:31:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:31:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:31:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:31:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:31:30,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:31:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:31:30,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:31:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:31:30,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:31:30,061 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:31:30,155 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:31:30,156 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:31:30,329 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:31:30,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:31:30,388 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 10:31:30,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:30 BoogieIcfgContainer [2022-07-12 10:31:30,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:31:30,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:31:30,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:31:30,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:31:30,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:31:29" (1/3) ... [2022-07-12 10:31:30,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755198f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:30, skipping insertion in model container [2022-07-12 10:31:30,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:31:29" (2/3) ... [2022-07-12 10:31:30,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@755198f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:31:30, skipping insertion in model container [2022-07-12 10:31:30,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:31:30" (3/3) ... [2022-07-12 10:31:30,398 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-07-12 10:31:30,402 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:31:30,427 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:31:30,427 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:31:30,427 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:31:30,488 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:31:30,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-07-12 10:31:30,598 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-12 10:31:30,599 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:31:30,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-07-12 10:31:30,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-07-12 10:31:30,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-07-12 10:31:30,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:31:30,631 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@7bd58b33, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3f3b6397 [2022-07-12 10:31:30,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:31:30,671 INFO L129 PetriNetUnfolder]: 6/75 cut-off events. [2022-07-12 10:31:30,671 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:31:30,671 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:30,672 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] [2022-07-12 10:31:30,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:30,678 INFO L85 PathProgramCache]: Analyzing trace with hash 653583360, now seen corresponding path program 1 times [2022-07-12 10:31:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:30,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604829232] [2022-07-12 10:31:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:31,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:31,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604829232] [2022-07-12 10:31:31,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604829232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:31,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:31,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:31:31,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003283612] [2022-07-12 10:31:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:31,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:31:31,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:31:31,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:31:31,130 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:31:31,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:31,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:31,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:31:31,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:31,265 INFO L129 PetriNetUnfolder]: 8/110 cut-off events. [2022-07-12 10:31:31,265 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:31:31,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 110 events. 8/110 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 1 based on Foata normal form. 15/117 useless extension candidates. Maximal degree in co-relation 62. Up to 18 conditions per place. [2022-07-12 10:31:31,268 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 15 selfloop transitions, 2 changer transitions 8/80 dead transitions. [2022-07-12 10:31:31,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 231 flow [2022-07-12 10:31:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:31:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:31:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 489 transitions. [2022-07-12 10:31:31,289 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8029556650246306 [2022-07-12 10:31:31,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 489 transitions. [2022-07-12 10:31:31,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 489 transitions. [2022-07-12 10:31:31,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:31,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 489 transitions. [2022-07-12 10:31:31,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 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) [2022-07-12 10:31:31,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-07-12 10:31:31,309 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-07-12 10:31:31,311 INFO L186 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 7 states and 489 transitions. [2022-07-12 10:31:31,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 231 flow [2022-07-12 10:31:31,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 217 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:31:31,317 INFO L242 Difference]: Finished difference. Result has 82 places, 71 transitions, 162 flow [2022-07-12 10:31:31,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2022-07-12 10:31:31,322 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-07-12 10:31:31,322 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 162 flow [2022-07-12 10:31:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:31,323 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:31,323 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:31:31,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2080326486, now seen corresponding path program 1 times [2022-07-12 10:31:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:31,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548690372] [2022-07-12 10:31:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:31,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548690372] [2022-07-12 10:31:31,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548690372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:31,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:31,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:31:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120150574] [2022-07-12 10:31:31,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:31,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:31:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:31:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:31:31,460 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:31:31,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:31,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:31,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:31:31,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:31,555 INFO L129 PetriNetUnfolder]: 74/272 cut-off events. [2022-07-12 10:31:31,555 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-12 10:31:31,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 272 events. 74/272 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1161 event pairs, 22 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 468. Up to 95 conditions per place. [2022-07-12 10:31:31,558 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 31 selfloop transitions, 7 changer transitions 4/96 dead transitions. [2022-07-12 10:31:31,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 305 flow [2022-07-12 10:31:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:31:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:31:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2022-07-12 10:31:31,560 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8482758620689655 [2022-07-12 10:31:31,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2022-07-12 10:31:31,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2022-07-12 10:31:31,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:31,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2022-07-12 10:31:31,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 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) [2022-07-12 10:31:31,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 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) [2022-07-12 10:31:31,564 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 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) [2022-07-12 10:31:31,564 INFO L186 Difference]: Start difference. First operand has 82 places, 71 transitions, 162 flow. Second operand 5 states and 369 transitions. [2022-07-12 10:31:31,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 305 flow [2022-07-12 10:31:31,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 299 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:31:31,567 INFO L242 Difference]: Finished difference. Result has 80 places, 77 transitions, 207 flow [2022-07-12 10:31:31,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2022-07-12 10:31:31,568 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-07-12 10:31:31,569 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 207 flow [2022-07-12 10:31:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:31,569 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:31,570 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:31:31,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1370932692, now seen corresponding path program 2 times [2022-07-12 10:31:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:31,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960050094] [2022-07-12 10:31:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:31,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960050094] [2022-07-12 10:31:31,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960050094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123647592] [2022-07-12 10:31:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:31,684 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) [2022-07-12 10:31:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:31:31,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:31,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 10:31:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:31,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:31:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123647592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:31,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:31:31,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-12 10:31:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021360923] [2022-07-12 10:31:31,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:31:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:31:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:31:31,848 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-07-12 10:31:31,849 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 207 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 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) [2022-07-12 10:31:31,849 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:31,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-07-12 10:31:31,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:31,928 INFO L129 PetriNetUnfolder]: 64/245 cut-off events. [2022-07-12 10:31:31,929 INFO L130 PetriNetUnfolder]: For 75/81 co-relation queries the response was YES. [2022-07-12 10:31:31,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 245 events. 64/245 cut-off events. For 75/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1064 event pairs, 19 based on Foata normal form. 7/239 useless extension candidates. Maximal degree in co-relation 365. Up to 74 conditions per place. [2022-07-12 10:31:31,931 INFO L132 encePairwiseOnDemand]: 82/87 looper letters, 23 selfloop transitions, 7 changer transitions 3/92 dead transitions. [2022-07-12 10:31:31,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 92 transitions, 329 flow [2022-07-12 10:31:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:31:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:31:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 302 transitions. [2022-07-12 10:31:31,933 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2022-07-12 10:31:31,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 302 transitions. [2022-07-12 10:31:31,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 302 transitions. [2022-07-12 10:31:31,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:31,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 302 transitions. [2022-07-12 10:31:31,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.5) internal successors, (302), 4 states have internal predecessors, (302), 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) [2022-07-12 10:31:31,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2022-07-12 10:31:31,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 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) [2022-07-12 10:31:31,937 INFO L186 Difference]: Start difference. First operand has 80 places, 77 transitions, 207 flow. Second operand 4 states and 302 transitions. [2022-07-12 10:31:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 92 transitions, 329 flow [2022-07-12 10:31:31,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:31:31,941 INFO L242 Difference]: Finished difference. Result has 86 places, 81 transitions, 263 flow [2022-07-12 10:31:31,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2022-07-12 10:31:31,942 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2022-07-12 10:31:31,942 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 263 flow [2022-07-12 10:31:31,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 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) [2022-07-12 10:31:31,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:31,943 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:31,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:32,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:32,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1132170860, now seen corresponding path program 3 times [2022-07-12 10:31:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:32,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873128482] [2022-07-12 10:31:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:32,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873128482] [2022-07-12 10:31:32,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873128482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:32,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:32,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:31:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548039652] [2022-07-12 10:31:32,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:32,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:31:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:31:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:31:32,283 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:31:32,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:32,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:32,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:31:32,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:32,409 INFO L129 PetriNetUnfolder]: 127/424 cut-off events. [2022-07-12 10:31:32,410 INFO L130 PetriNetUnfolder]: For 314/314 co-relation queries the response was YES. [2022-07-12 10:31:32,412 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 424 events. 127/424 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2139 event pairs, 52 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 752. Up to 125 conditions per place. [2022-07-12 10:31:32,416 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 37 selfloop transitions, 9 changer transitions 4/104 dead transitions. [2022-07-12 10:31:32,417 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 460 flow [2022-07-12 10:31:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:31:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:31:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-07-12 10:31:32,419 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-07-12 10:31:32,423 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-07-12 10:31:32,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-07-12 10:31:32,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:32,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-07-12 10:31:32,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 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) [2022-07-12 10:31:32,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-07-12 10:31:32,428 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-07-12 10:31:32,428 INFO L186 Difference]: Start difference. First operand has 86 places, 81 transitions, 263 flow. Second operand 6 states and 429 transitions. [2022-07-12 10:31:32,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 460 flow [2022-07-12 10:31:32,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 452 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-07-12 10:31:32,438 INFO L242 Difference]: Finished difference. Result has 94 places, 83 transitions, 305 flow [2022-07-12 10:31:32,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2022-07-12 10:31:32,440 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 17 predicate places. [2022-07-12 10:31:32,440 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 305 flow [2022-07-12 10:31:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 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) [2022-07-12 10:31:32,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:32,447 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:32,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:31:32,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1391320060, now seen corresponding path program 4 times [2022-07-12 10:31:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989650686] [2022-07-12 10:31:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989650686] [2022-07-12 10:31:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989650686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:32,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097558028] [2022-07-12 10:31:32,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:31:32,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:32,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:32,562 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) [2022-07-12 10:31:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:31:32,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:31:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 10:31:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:32,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097558028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:32,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:32,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-07-12 10:31:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088728550] [2022-07-12 10:31:32,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:31:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:31:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:31:32,815 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:31:32,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 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) [2022-07-12 10:31:32,816 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:32,816 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:31:32,816 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:33,063 INFO L129 PetriNetUnfolder]: 209/644 cut-off events. [2022-07-12 10:31:33,063 INFO L130 PetriNetUnfolder]: For 775/784 co-relation queries the response was YES. [2022-07-12 10:31:33,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 644 events. 209/644 cut-off events. For 775/784 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3836 event pairs, 19 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 1171. Up to 100 conditions per place. [2022-07-12 10:31:33,068 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 53 selfloop transitions, 36 changer transitions 10/153 dead transitions. [2022-07-12 10:31:33,068 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 153 transitions, 848 flow [2022-07-12 10:31:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:31:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:31:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 736 transitions. [2022-07-12 10:31:33,072 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8459770114942529 [2022-07-12 10:31:33,072 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 736 transitions. [2022-07-12 10:31:33,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 736 transitions. [2022-07-12 10:31:33,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:33,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 736 transitions. [2022-07-12 10:31:33,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.6) internal successors, (736), 10 states have internal predecessors, (736), 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) [2022-07-12 10:31:33,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 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) [2022-07-12 10:31:33,077 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 87.0) internal successors, (957), 11 states have internal predecessors, (957), 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) [2022-07-12 10:31:33,077 INFO L186 Difference]: Start difference. First operand has 94 places, 83 transitions, 305 flow. Second operand 10 states and 736 transitions. [2022-07-12 10:31:33,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 153 transitions, 848 flow [2022-07-12 10:31:33,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 817 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-12 10:31:33,083 INFO L242 Difference]: Finished difference. Result has 108 places, 107 transitions, 610 flow [2022-07-12 10:31:33,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2022-07-12 10:31:33,086 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 31 predicate places. [2022-07-12 10:31:33,086 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 610 flow [2022-07-12 10:31:33,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.875) internal successors, (543), 8 states have internal predecessors, (543), 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) [2022-07-12 10:31:33,087 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:33,087 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:31:33,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:31:33,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:33,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:33,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2053154838, now seen corresponding path program 5 times [2022-07-12 10:31:33,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:33,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116017236] [2022-07-12 10:31:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:33,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:33,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116017236] [2022-07-12 10:31:33,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116017236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:31:33,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:31:33,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:31:33,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060794853] [2022-07-12 10:31:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:31:33,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:31:33,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:33,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:31:33,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:31:33,481 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-07-12 10:31:33,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 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) [2022-07-12 10:31:33,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:33,482 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-07-12 10:31:33,482 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:33,655 INFO L129 PetriNetUnfolder]: 207/624 cut-off events. [2022-07-12 10:31:33,655 INFO L130 PetriNetUnfolder]: For 1956/1960 co-relation queries the response was YES. [2022-07-12 10:31:33,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 624 events. 207/624 cut-off events. For 1956/1960 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3659 event pairs, 81 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 1629. Up to 229 conditions per place. [2022-07-12 10:31:33,662 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 47 selfloop transitions, 27 changer transitions 7/135 dead transitions. [2022-07-12 10:31:33,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 946 flow [2022-07-12 10:31:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 10:31:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-12 10:31:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 442 transitions. [2022-07-12 10:31:33,664 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8467432950191571 [2022-07-12 10:31:33,666 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 442 transitions. [2022-07-12 10:31:33,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 442 transitions. [2022-07-12 10:31:33,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:33,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 442 transitions. [2022-07-12 10:31:33,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 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) [2022-07-12 10:31:33,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-07-12 10:31:33,669 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 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) [2022-07-12 10:31:33,669 INFO L186 Difference]: Start difference. First operand has 108 places, 107 transitions, 610 flow. Second operand 6 states and 442 transitions. [2022-07-12 10:31:33,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 946 flow [2022-07-12 10:31:33,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 920 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-07-12 10:31:33,682 INFO L242 Difference]: Finished difference. Result has 115 places, 111 transitions, 710 flow [2022-07-12 10:31:33,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=710, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2022-07-12 10:31:33,685 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 38 predicate places. [2022-07-12 10:31:33,686 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 710 flow [2022-07-12 10:31:33,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 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) [2022-07-12 10:31:33,686 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:33,686 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] [2022-07-12 10:31:33,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:31:33,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1438588188, now seen corresponding path program 1 times [2022-07-12 10:31:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755634442] [2022-07-12 10:31:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:33,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:33,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755634442] [2022-07-12 10:31:33,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755634442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:33,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885531807] [2022-07-12 10:31:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:33,843 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) [2022-07-12 10:31:33,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:31:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 10:31:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:31:34,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:31:34,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885531807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:34,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:34,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-07-12 10:31:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916070889] [2022-07-12 10:31:34,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:31:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:34,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:31:34,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:31:34,141 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:34,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 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) [2022-07-12 10:31:34,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:34,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:34,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:34,287 INFO L129 PetriNetUnfolder]: 108/637 cut-off events. [2022-07-12 10:31:34,288 INFO L130 PetriNetUnfolder]: For 1574/1604 co-relation queries the response was YES. [2022-07-12 10:31:34,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 637 events. 108/637 cut-off events. For 1574/1604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 18 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 1476. Up to 88 conditions per place. [2022-07-12 10:31:34,294 INFO L132 encePairwiseOnDemand]: 79/87 looper letters, 23 selfloop transitions, 7 changer transitions 4/126 dead transitions. [2022-07-12 10:31:34,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 818 flow [2022-07-12 10:31:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:31:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:31:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2022-07-12 10:31:34,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7816091954022989 [2022-07-12 10:31:34,296 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2022-07-12 10:31:34,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2022-07-12 10:31:34,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:34,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2022-07-12 10:31:34,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 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) [2022-07-12 10:31:34,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-07-12 10:31:34,301 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 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) [2022-07-12 10:31:34,302 INFO L186 Difference]: Start difference. First operand has 115 places, 111 transitions, 710 flow. Second operand 7 states and 476 transitions. [2022-07-12 10:31:34,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 818 flow [2022-07-12 10:31:34,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 126 transitions, 755 flow, removed 13 selfloop flow, removed 5 redundant places. [2022-07-12 10:31:34,311 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 691 flow [2022-07-12 10:31:34,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=691, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2022-07-12 10:31:34,312 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-07-12 10:31:34,312 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 691 flow [2022-07-12 10:31:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 67.0) internal successors, (536), 8 states have internal predecessors, (536), 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) [2022-07-12 10:31:34,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:34,313 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:34,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:34,524 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2121607920, now seen corresponding path program 2 times [2022-07-12 10:31:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898985179] [2022-07-12 10:31:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:34,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898985179] [2022-07-12 10:31:34,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898985179] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342184799] [2022-07-12 10:31:34,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:31:34,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:34,703 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) [2022-07-12 10:31:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:31:34,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:31:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:31:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:35,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342184799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:35,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:35,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:31:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951988358] [2022-07-12 10:31:35,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:35,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:31:35,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:31:35,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:31:35,074 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:35,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 691 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 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) [2022-07-12 10:31:35,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:35,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:35,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:38,065 INFO L129 PetriNetUnfolder]: 883/2531 cut-off events. [2022-07-12 10:31:38,065 INFO L130 PetriNetUnfolder]: For 6718/6737 co-relation queries the response was YES. [2022-07-12 10:31:38,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 2531 events. 883/2531 cut-off events. For 6718/6737 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19769 event pairs, 62 based on Foata normal form. 32/2548 useless extension candidates. Maximal degree in co-relation 8273. Up to 294 conditions per place. [2022-07-12 10:31:38,089 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 173 selfloop transitions, 210 changer transitions 24/461 dead transitions. [2022-07-12 10:31:38,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 461 transitions, 3794 flow [2022-07-12 10:31:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-12 10:31:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-07-12 10:31:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4883 transitions. [2022-07-12 10:31:38,108 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7795338441890166 [2022-07-12 10:31:38,108 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4883 transitions. [2022-07-12 10:31:38,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4883 transitions. [2022-07-12 10:31:38,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:38,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4883 transitions. [2022-07-12 10:31:38,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 67.81944444444444) internal successors, (4883), 72 states have internal predecessors, (4883), 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) [2022-07-12 10:31:38,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 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) [2022-07-12 10:31:38,171 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 87.0) internal successors, (6351), 73 states have internal predecessors, (6351), 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) [2022-07-12 10:31:38,171 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 691 flow. Second operand 72 states and 4883 transitions. [2022-07-12 10:31:38,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 461 transitions, 3794 flow [2022-07-12 10:31:38,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 461 transitions, 3726 flow, removed 33 selfloop flow, removed 3 redundant places. [2022-07-12 10:31:38,198 INFO L242 Difference]: Finished difference. Result has 218 places, 299 transitions, 2745 flow [2022-07-12 10:31:38,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=2745, PETRI_PLACES=218, PETRI_TRANSITIONS=299} [2022-07-12 10:31:38,201 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 141 predicate places. [2022-07-12 10:31:38,201 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 299 transitions, 2745 flow [2022-07-12 10:31:38,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 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) [2022-07-12 10:31:38,202 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:38,202 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:38,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:38,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1078465688, now seen corresponding path program 3 times [2022-07-12 10:31:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342433445] [2022-07-12 10:31:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:38,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:38,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:38,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342433445] [2022-07-12 10:31:38,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342433445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:38,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10809970] [2022-07-12 10:31:38,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:31:38,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:38,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:38,564 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) [2022-07-12 10:31:38,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:31:38,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:31:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:31:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:38,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:38,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10809970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:38,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:38,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-12 10:31:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701025262] [2022-07-12 10:31:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:38,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 10:31:38,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 10:31:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-12 10:31:38,887 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:38,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 299 transitions, 2745 flow. Second operand has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 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) [2022-07-12 10:31:38,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:38,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:38,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:40,658 INFO L129 PetriNetUnfolder]: 1220/3244 cut-off events. [2022-07-12 10:31:40,659 INFO L130 PetriNetUnfolder]: For 34165/34183 co-relation queries the response was YES. [2022-07-12 10:31:40,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17105 conditions, 3244 events. 1220/3244 cut-off events. For 34165/34183 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 26181 event pairs, 58 based on Foata normal form. 36/3258 useless extension candidates. Maximal degree in co-relation 15734. Up to 438 conditions per place. [2022-07-12 10:31:40,707 INFO L132 encePairwiseOnDemand]: 76/87 looper letters, 171 selfloop transitions, 431 changer transitions 12/668 dead transitions. [2022-07-12 10:31:40,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 668 transitions, 8330 flow [2022-07-12 10:31:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 10:31:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-12 10:31:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3176 transitions. [2022-07-12 10:31:40,713 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7767180239667401 [2022-07-12 10:31:40,713 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3176 transitions. [2022-07-12 10:31:40,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3176 transitions. [2022-07-12 10:31:40,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:40,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3176 transitions. [2022-07-12 10:31:40,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.57446808510639) internal successors, (3176), 47 states have internal predecessors, (3176), 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) [2022-07-12 10:31:40,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 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) [2022-07-12 10:31:40,732 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 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) [2022-07-12 10:31:40,732 INFO L186 Difference]: Start difference. First operand has 218 places, 299 transitions, 2745 flow. Second operand 47 states and 3176 transitions. [2022-07-12 10:31:40,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 668 transitions, 8330 flow [2022-07-12 10:31:40,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 668 transitions, 7510 flow, removed 346 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:40,909 INFO L242 Difference]: Finished difference. Result has 284 places, 547 transitions, 6270 flow [2022-07-12 10:31:40,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=6270, PETRI_PLACES=284, PETRI_TRANSITIONS=547} [2022-07-12 10:31:40,910 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 207 predicate places. [2022-07-12 10:31:40,910 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 547 transitions, 6270 flow [2022-07-12 10:31:40,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.625) internal successors, (1050), 16 states have internal predecessors, (1050), 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) [2022-07-12 10:31:40,911 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:40,911 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:40,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 10:31:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:41,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash -599658512, now seen corresponding path program 4 times [2022-07-12 10:31:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:41,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734988205] [2022-07-12 10:31:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:41,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734988205] [2022-07-12 10:31:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734988205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222316192] [2022-07-12 10:31:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:31:41,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:41,268 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) [2022-07-12 10:31:41,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:31:41,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:31:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:31:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:41,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:41,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222316192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:41,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:41,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-12 10:31:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343685429] [2022-07-12 10:31:41,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:41,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 10:31:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 10:31:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-12 10:31:41,551 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:41,552 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 547 transitions, 6270 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 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) [2022-07-12 10:31:41,552 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:41,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:41,552 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:43,330 INFO L129 PetriNetUnfolder]: 1238/3407 cut-off events. [2022-07-12 10:31:43,338 INFO L130 PetriNetUnfolder]: For 62138/62174 co-relation queries the response was YES. [2022-07-12 10:31:43,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20630 conditions, 3407 events. 1238/3407 cut-off events. For 62138/62174 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 28274 event pairs, 77 based on Foata normal form. 15/3388 useless extension candidates. Maximal degree in co-relation 19180. Up to 544 conditions per place. [2022-07-12 10:31:43,401 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 341 selfloop transitions, 279 changer transitions 42/716 dead transitions. [2022-07-12 10:31:43,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 716 transitions, 10316 flow [2022-07-12 10:31:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:31:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:31:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2574 transitions. [2022-07-12 10:31:43,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.778584392014519 [2022-07-12 10:31:43,411 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2574 transitions. [2022-07-12 10:31:43,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2574 transitions. [2022-07-12 10:31:43,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:43,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2574 transitions. [2022-07-12 10:31:43,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.73684210526316) internal successors, (2574), 38 states have internal predecessors, (2574), 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) [2022-07-12 10:31:43,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 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) [2022-07-12 10:31:43,422 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 87.0) internal successors, (3393), 39 states have internal predecessors, (3393), 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) [2022-07-12 10:31:43,422 INFO L186 Difference]: Start difference. First operand has 284 places, 547 transitions, 6270 flow. Second operand 38 states and 2574 transitions. [2022-07-12 10:31:43,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 716 transitions, 10316 flow [2022-07-12 10:31:43,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 716 transitions, 9327 flow, removed 350 selfloop flow, removed 2 redundant places. [2022-07-12 10:31:43,709 INFO L242 Difference]: Finished difference. Result has 332 places, 584 transitions, 6655 flow [2022-07-12 10:31:43,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5504, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6655, PETRI_PLACES=332, PETRI_TRANSITIONS=584} [2022-07-12 10:31:43,711 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 255 predicate places. [2022-07-12 10:31:43,711 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 6655 flow [2022-07-12 10:31:43,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 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) [2022-07-12 10:31:43,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:43,712 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:43,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:43,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:43,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -907958500, now seen corresponding path program 5 times [2022-07-12 10:31:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454200580] [2022-07-12 10:31:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:44,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454200580] [2022-07-12 10:31:44,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454200580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:44,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764468164] [2022-07-12 10:31:44,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:31:44,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:44,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:44,079 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) [2022-07-12 10:31:44,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:31:44,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:31:44,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:44,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 10:31:44,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:44,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764468164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:44,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:44,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-07-12 10:31:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175155662] [2022-07-12 10:31:44,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 10:31:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 10:31:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:31:44,561 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:44,562 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 584 transitions, 6655 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 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) [2022-07-12 10:31:44,562 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:44,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:44,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:46,268 INFO L129 PetriNetUnfolder]: 1514/4097 cut-off events. [2022-07-12 10:31:46,269 INFO L130 PetriNetUnfolder]: For 81650/81663 co-relation queries the response was YES. [2022-07-12 10:31:46,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25293 conditions, 4097 events. 1514/4097 cut-off events. For 81650/81663 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 34473 event pairs, 121 based on Foata normal form. 10/4100 useless extension candidates. Maximal degree in co-relation 24928. Up to 798 conditions per place. [2022-07-12 10:31:46,329 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 365 selfloop transitions, 429 changer transitions 5/853 dead transitions. [2022-07-12 10:31:46,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 853 transitions, 11707 flow [2022-07-12 10:31:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:31:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:31:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1887 transitions. [2022-07-12 10:31:46,333 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7746305418719212 [2022-07-12 10:31:46,333 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1887 transitions. [2022-07-12 10:31:46,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1887 transitions. [2022-07-12 10:31:46,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:46,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1887 transitions. [2022-07-12 10:31:46,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 67.39285714285714) internal successors, (1887), 28 states have internal predecessors, (1887), 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) [2022-07-12 10:31:46,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 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) [2022-07-12 10:31:46,340 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 87.0) internal successors, (2523), 29 states have internal predecessors, (2523), 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) [2022-07-12 10:31:46,340 INFO L186 Difference]: Start difference. First operand has 332 places, 584 transitions, 6655 flow. Second operand 28 states and 1887 transitions. [2022-07-12 10:31:46,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 853 transitions, 11707 flow [2022-07-12 10:31:46,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 853 transitions, 11412 flow, removed 109 selfloop flow, removed 6 redundant places. [2022-07-12 10:31:46,803 INFO L242 Difference]: Finished difference. Result has 357 places, 746 transitions, 10190 flow [2022-07-12 10:31:46,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10190, PETRI_PLACES=357, PETRI_TRANSITIONS=746} [2022-07-12 10:31:46,804 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 280 predicate places. [2022-07-12 10:31:46,805 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 746 transitions, 10190 flow [2022-07-12 10:31:46,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 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) [2022-07-12 10:31:46,806 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:46,806 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:46,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:47,012 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash 996319846, now seen corresponding path program 6 times [2022-07-12 10:31:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597736839] [2022-07-12 10:31:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:47,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:47,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597736839] [2022-07-12 10:31:47,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597736839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:47,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102695372] [2022-07-12 10:31:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:31:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:47,142 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) [2022-07-12 10:31:47,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:31:47,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:31:47,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:31:47,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:31:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:47,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102695372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:47,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:47,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 10:31:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776666511] [2022-07-12 10:31:47,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:31:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:31:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:31:47,505 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:47,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 746 transitions, 10190 flow. Second operand has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 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) [2022-07-12 10:31:47,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:47,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:47,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:52,081 INFO L129 PetriNetUnfolder]: 2382/6414 cut-off events. [2022-07-12 10:31:52,081 INFO L130 PetriNetUnfolder]: For 156511/156537 co-relation queries the response was YES. [2022-07-12 10:31:52,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43397 conditions, 6414 events. 2382/6414 cut-off events. For 156511/156537 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 59614 event pairs, 33 based on Foata normal form. 32/6420 useless extension candidates. Maximal degree in co-relation 42984. Up to 750 conditions per place. [2022-07-12 10:31:52,184 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 289 selfloop transitions, 1096 changer transitions 5/1444 dead transitions. [2022-07-12 10:31:52,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1444 transitions, 24022 flow [2022-07-12 10:31:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-12 10:31:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-07-12 10:31:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 7224 transitions. [2022-07-12 10:31:52,193 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.768837803320562 [2022-07-12 10:31:52,194 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 7224 transitions. [2022-07-12 10:31:52,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 7224 transitions. [2022-07-12 10:31:52,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:52,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 7224 transitions. [2022-07-12 10:31:52,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 66.88888888888889) internal successors, (7224), 108 states have internal predecessors, (7224), 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) [2022-07-12 10:31:52,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 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) [2022-07-12 10:31:52,224 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 87.0) internal successors, (9483), 109 states have internal predecessors, (9483), 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) [2022-07-12 10:31:52,224 INFO L186 Difference]: Start difference. First operand has 357 places, 746 transitions, 10190 flow. Second operand 108 states and 7224 transitions. [2022-07-12 10:31:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1444 transitions, 24022 flow [2022-07-12 10:31:53,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1444 transitions, 22667 flow, removed 629 selfloop flow, removed 7 redundant places. [2022-07-12 10:31:53,318 INFO L242 Difference]: Finished difference. Result has 487 places, 1261 transitions, 20726 flow [2022-07-12 10:31:53,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=20726, PETRI_PLACES=487, PETRI_TRANSITIONS=1261} [2022-07-12 10:31:53,320 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 410 predicate places. [2022-07-12 10:31:53,320 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 1261 transitions, 20726 flow [2022-07-12 10:31:53,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.8) internal successors, (1316), 20 states have internal predecessors, (1316), 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) [2022-07-12 10:31:53,321 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:31:53,321 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:31:53,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:31:53,527 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,SelfDestructingSolverStorable11 [2022-07-12 10:31:53,528 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:31:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:31:53,528 INFO L85 PathProgramCache]: Analyzing trace with hash 356696528, now seen corresponding path program 7 times [2022-07-12 10:31:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:31:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174420466] [2022-07-12 10:31:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:31:53,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:31:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:53,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:31:53,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174420466] [2022-07-12 10:31:53,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174420466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:31:53,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374784717] [2022-07-12 10:31:53,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:31:53,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:31:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:31:53,664 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) [2022-07-12 10:31:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:31:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:31:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:31:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:31:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:53,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:31:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:31:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374784717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:31:54,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:31:54,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:31:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750811109] [2022-07-12 10:31:54,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:31:54,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:31:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:31:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:31:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:31:54,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:31:54,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 1261 transitions, 20726 flow. Second operand has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 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) [2022-07-12 10:31:54,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:31:54,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:31:54,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:31:58,989 INFO L129 PetriNetUnfolder]: 3289/8637 cut-off events. [2022-07-12 10:31:58,989 INFO L130 PetriNetUnfolder]: For 260282/260321 co-relation queries the response was YES. [2022-07-12 10:31:59,080 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66445 conditions, 8637 events. 3289/8637 cut-off events. For 260282/260321 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 84543 event pairs, 120 based on Foata normal form. 51/8596 useless extension candidates. Maximal degree in co-relation 66002. Up to 1078 conditions per place. [2022-07-12 10:31:59,142 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 352 selfloop transitions, 1545 changer transitions 3/1954 dead transitions. [2022-07-12 10:31:59,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1954 transitions, 36611 flow [2022-07-12 10:31:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-12 10:31:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-07-12 10:31:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4171 transitions. [2022-07-12 10:31:59,148 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7732665925101965 [2022-07-12 10:31:59,148 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4171 transitions. [2022-07-12 10:31:59,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4171 transitions. [2022-07-12 10:31:59,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:31:59,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4171 transitions. [2022-07-12 10:31:59,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.2741935483871) internal successors, (4171), 62 states have internal predecessors, (4171), 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) [2022-07-12 10:31:59,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 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) [2022-07-12 10:31:59,164 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 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) [2022-07-12 10:31:59,164 INFO L186 Difference]: Start difference. First operand has 487 places, 1261 transitions, 20726 flow. Second operand 62 states and 4171 transitions. [2022-07-12 10:31:59,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1954 transitions, 36611 flow [2022-07-12 10:32:01,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 1954 transitions, 34119 flow, removed 1110 selfloop flow, removed 8 redundant places. [2022-07-12 10:32:01,197 INFO L242 Difference]: Finished difference. Result has 569 places, 1846 transitions, 34105 flow [2022-07-12 10:32:01,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=19253, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=34105, PETRI_PLACES=569, PETRI_TRANSITIONS=1846} [2022-07-12 10:32:01,199 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 492 predicate places. [2022-07-12 10:32:01,199 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1846 transitions, 34105 flow [2022-07-12 10:32:01,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.66666666666667) internal successors, (1182), 18 states have internal predecessors, (1182), 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) [2022-07-12 10:32:01,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:01,200 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:32:01,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:01,425 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,SelfDestructingSolverStorable12 [2022-07-12 10:32:01,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 768637718, now seen corresponding path program 8 times [2022-07-12 10:32:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:01,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069281960] [2022-07-12 10:32:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:01,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069281960] [2022-07-12 10:32:01,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069281960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:01,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367130785] [2022-07-12 10:32:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:32:01,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:01,548 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) [2022-07-12 10:32:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:32:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:32:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:32:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:01,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:01,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367130785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:01,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:01,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:32:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858178217] [2022-07-12 10:32:01,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:32:01,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:32:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:32:01,845 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:32:01,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1846 transitions, 34105 flow. Second operand has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 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) [2022-07-12 10:32:01,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:01,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:32:01,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:09,523 INFO L129 PetriNetUnfolder]: 4079/10778 cut-off events. [2022-07-12 10:32:09,523 INFO L130 PetriNetUnfolder]: For 303815/303840 co-relation queries the response was YES. [2022-07-12 10:32:09,664 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83501 conditions, 10778 events. 4079/10778 cut-off events. For 303815/303840 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 111162 event pairs, 86 based on Foata normal form. 31/10762 useless extension candidates. Maximal degree in co-relation 83132. Up to 1331 conditions per place. [2022-07-12 10:32:09,725 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 313 selfloop transitions, 2117 changer transitions 3/2487 dead transitions. [2022-07-12 10:32:09,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 2487 transitions, 50680 flow [2022-07-12 10:32:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-12 10:32:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-07-12 10:32:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5263 transitions. [2022-07-12 10:32:09,731 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7657500363742179 [2022-07-12 10:32:09,731 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5263 transitions. [2022-07-12 10:32:09,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5263 transitions. [2022-07-12 10:32:09,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:09,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5263 transitions. [2022-07-12 10:32:09,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.62025316455696) internal successors, (5263), 79 states have internal predecessors, (5263), 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) [2022-07-12 10:32:09,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 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) [2022-07-12 10:32:09,748 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 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) [2022-07-12 10:32:09,748 INFO L186 Difference]: Start difference. First operand has 569 places, 1846 transitions, 34105 flow. Second operand 79 states and 5263 transitions. [2022-07-12 10:32:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 2487 transitions, 50680 flow [2022-07-12 10:32:12,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2487 transitions, 50128 flow, removed 149 selfloop flow, removed 13 redundant places. [2022-07-12 10:32:12,949 INFO L242 Difference]: Finished difference. Result has 666 places, 2387 transitions, 50391 flow [2022-07-12 10:32:12,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=33652, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=50391, PETRI_PLACES=666, PETRI_TRANSITIONS=2387} [2022-07-12 10:32:12,952 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 589 predicate places. [2022-07-12 10:32:12,952 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 2387 transitions, 50391 flow [2022-07-12 10:32:12,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.42105263157895) internal successors, (1243), 19 states have internal predecessors, (1243), 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) [2022-07-12 10:32:12,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:12,953 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:32:12,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:13,167 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,SelfDestructingSolverStorable13 [2022-07-12 10:32:13,167 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1627796726, now seen corresponding path program 9 times [2022-07-12 10:32:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883671472] [2022-07-12 10:32:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:13,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883671472] [2022-07-12 10:32:13,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883671472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:13,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473187928] [2022-07-12 10:32:13,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:32:13,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:13,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:13,276 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) [2022-07-12 10:32:13,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:32:13,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 10:32:13,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:32:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:13,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473187928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:13,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:13,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:32:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320528461] [2022-07-12 10:32:13,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:32:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:32:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:32:13,538 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:32:13,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 2387 transitions, 50391 flow. Second operand has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 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) [2022-07-12 10:32:13,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:13,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:32:13,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:22,440 INFO L129 PetriNetUnfolder]: 4231/11248 cut-off events. [2022-07-12 10:32:22,440 INFO L130 PetriNetUnfolder]: For 366383/366409 co-relation queries the response was YES. [2022-07-12 10:32:22,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 11248 events. 4231/11248 cut-off events. For 366383/366409 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 117497 event pairs, 131 based on Foata normal form. 27/11158 useless extension candidates. Maximal degree in co-relation 94392. Up to 1392 conditions per place. [2022-07-12 10:32:22,687 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 854 selfloop transitions, 1765 changer transitions 26/2699 dead transitions. [2022-07-12 10:32:22,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 2699 transitions, 61925 flow [2022-07-12 10:32:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 10:32:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-12 10:32:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4370 transitions. [2022-07-12 10:32:22,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7727674624226348 [2022-07-12 10:32:22,696 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4370 transitions. [2022-07-12 10:32:22,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4370 transitions. [2022-07-12 10:32:22,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:22,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4370 transitions. [2022-07-12 10:32:22,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.23076923076923) internal successors, (4370), 65 states have internal predecessors, (4370), 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) [2022-07-12 10:32:22,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 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) [2022-07-12 10:32:22,711 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 87.0) internal successors, (5742), 66 states have internal predecessors, (5742), 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) [2022-07-12 10:32:22,711 INFO L186 Difference]: Start difference. First operand has 666 places, 2387 transitions, 50391 flow. Second operand 65 states and 4370 transitions. [2022-07-12 10:32:22,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 2699 transitions, 61925 flow [2022-07-12 10:32:27,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2699 transitions, 61349 flow, removed 155 selfloop flow, removed 18 redundant places. [2022-07-12 10:32:27,292 INFO L242 Difference]: Finished difference. Result has 724 places, 2545 transitions, 58046 flow [2022-07-12 10:32:27,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=49721, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=58046, PETRI_PLACES=724, PETRI_TRANSITIONS=2545} [2022-07-12 10:32:27,295 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 647 predicate places. [2022-07-12 10:32:27,295 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2545 transitions, 58046 flow [2022-07-12 10:32:27,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.36842105263158) internal successors, (1242), 19 states have internal predecessors, (1242), 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) [2022-07-12 10:32:27,296 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:27,296 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:32:27,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:27,520 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,SelfDestructingSolverStorable14 [2022-07-12 10:32:27,521 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1906991496, now seen corresponding path program 10 times [2022-07-12 10:32:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:27,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68272673] [2022-07-12 10:32:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:27,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:27,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68272673] [2022-07-12 10:32:27,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68272673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:27,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230234559] [2022-07-12 10:32:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:32:27,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:27,679 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) [2022-07-12 10:32:27,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:32:27,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:32:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:32:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:27,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:27,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230234559] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:27,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:27,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-12 10:32:27,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220366774] [2022-07-12 10:32:27,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:32:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:32:27,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:32:27,967 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:32:27,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2545 transitions, 58046 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 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) [2022-07-12 10:32:27,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:27,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:32:27,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:32:41,165 INFO L129 PetriNetUnfolder]: 5636/14703 cut-off events. [2022-07-12 10:32:41,165 INFO L130 PetriNetUnfolder]: For 615022/615058 co-relation queries the response was YES. [2022-07-12 10:32:41,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138398 conditions, 14703 events. 5636/14703 cut-off events. For 615022/615058 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 159622 event pairs, 579 based on Foata normal form. 52/14586 useless extension candidates. Maximal degree in co-relation 138123. Up to 2145 conditions per place. [2022-07-12 10:32:41,549 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1011 selfloop transitions, 2492 changer transitions 2/3559 dead transitions. [2022-07-12 10:32:41,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 3559 transitions, 88295 flow [2022-07-12 10:32:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-12 10:32:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-07-12 10:32:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-07-12 10:32:41,554 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-07-12 10:32:41,554 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-07-12 10:32:41,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-07-12 10:32:41,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:32:41,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-07-12 10:32:41,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 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) [2022-07-12 10:32:41,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 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) [2022-07-12 10:32:41,568 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 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) [2022-07-12 10:32:41,569 INFO L186 Difference]: Start difference. First operand has 724 places, 2545 transitions, 58046 flow. Second operand 74 states and 4991 transitions. [2022-07-12 10:32:41,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 3559 transitions, 88295 flow [2022-07-12 10:32:49,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 3559 transitions, 86706 flow, removed 413 selfloop flow, removed 25 redundant places. [2022-07-12 10:32:49,980 INFO L242 Difference]: Finished difference. Result has 793 places, 3328 transitions, 84740 flow [2022-07-12 10:32:49,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=57036, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=84740, PETRI_PLACES=793, PETRI_TRANSITIONS=3328} [2022-07-12 10:32:49,983 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 716 predicate places. [2022-07-12 10:32:49,983 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 3328 transitions, 84740 flow [2022-07-12 10:32:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 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) [2022-07-12 10:32:49,983 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:32:49,984 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:32:50,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:32:50,190 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,SelfDestructingSolverStorable15 [2022-07-12 10:32:50,191 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:32:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:32:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1650327980, now seen corresponding path program 11 times [2022-07-12 10:32:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:32:50,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400413144] [2022-07-12 10:32:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:32:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:32:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:32:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:32:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400413144] [2022-07-12 10:32:50,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400413144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:32:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297734918] [2022-07-12 10:32:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:32:50,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:32:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:32:50,324 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) [2022-07-12 10:32:50,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:32:50,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:32:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:32:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:32:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:32:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:50,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:32:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:32:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297734918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:32:50,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:32:50,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:32:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469939617] [2022-07-12 10:32:50,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:32:50,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:32:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:32:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:32:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:32:50,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:32:50,583 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3328 transitions, 84740 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 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) [2022-07-12 10:32:50,583 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:32:50,583 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:32:50,583 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:33:09,792 INFO L129 PetriNetUnfolder]: 6268/16422 cut-off events. [2022-07-12 10:33:09,792 INFO L130 PetriNetUnfolder]: For 868432/868481 co-relation queries the response was YES. [2022-07-12 10:33:10,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167517 conditions, 16422 events. 6268/16422 cut-off events. For 868432/868481 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 180918 event pairs, 421 based on Foata normal form. 48/16267 useless extension candidates. Maximal degree in co-relation 167157. Up to 2169 conditions per place. [2022-07-12 10:33:10,422 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 711 selfloop transitions, 3100 changer transitions 4/3869 dead transitions. [2022-07-12 10:33:10,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 875 places, 3869 transitions, 105785 flow [2022-07-12 10:33:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-12 10:33:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-07-12 10:33:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-07-12 10:33:10,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-07-12 10:33:10,427 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-07-12 10:33:10,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-07-12 10:33:10,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:33:10,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-07-12 10:33:10,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 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) [2022-07-12 10:33:10,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 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) [2022-07-12 10:33:10,444 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 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) [2022-07-12 10:33:10,444 INFO L186 Difference]: Start difference. First operand has 793 places, 3328 transitions, 84740 flow. Second operand 83 states and 5585 transitions. [2022-07-12 10:33:10,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 875 places, 3869 transitions, 105785 flow [2022-07-12 10:33:23,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 3869 transitions, 104582 flow, removed 426 selfloop flow, removed 19 redundant places. [2022-07-12 10:33:23,983 INFO L242 Difference]: Finished difference. Result has 877 places, 3634 transitions, 102351 flow [2022-07-12 10:33:23,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=83816, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2800, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=102351, PETRI_PLACES=877, PETRI_TRANSITIONS=3634} [2022-07-12 10:33:23,986 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 800 predicate places. [2022-07-12 10:33:23,986 INFO L495 AbstractCegarLoop]: Abstraction has has 877 places, 3634 transitions, 102351 flow [2022-07-12 10:33:23,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 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) [2022-07-12 10:33:23,987 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:33:23,987 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:33:24,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 10:33:24,187 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,SelfDestructingSolverStorable16 [2022-07-12 10:33:24,187 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:33:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:33:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash 917077054, now seen corresponding path program 12 times [2022-07-12 10:33:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:33:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501878455] [2022-07-12 10:33:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:33:24,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:33:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:33:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:24,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:33:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501878455] [2022-07-12 10:33:24,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501878455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:33:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914384857] [2022-07-12 10:33:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:33:24,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:33:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:33:24,300 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) [2022-07-12 10:33:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:33:24,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-12 10:33:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:33:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:33:24,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:33:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:24,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:33:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:33:24,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914384857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:33:24,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:33:24,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:33:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422182341] [2022-07-12 10:33:24,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:33:24,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:33:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:33:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:33:24,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:33:24,624 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:33:24,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 877 places, 3634 transitions, 102351 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 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) [2022-07-12 10:33:24,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:33:24,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:33:24,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:34:00,910 INFO L129 PetriNetUnfolder]: 8477/22116 cut-off events. [2022-07-12 10:34:00,910 INFO L130 PetriNetUnfolder]: For 1434075/1434159 co-relation queries the response was YES. [2022-07-12 10:34:02,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244450 conditions, 22116 events. 8477/22116 cut-off events. For 1434075/1434159 co-relation queries the response was YES. Maximal size of possible extension queue 1397. Compared 255398 event pairs, 549 based on Foata normal form. 59/21942 useless extension candidates. Maximal degree in co-relation 243965. Up to 3110 conditions per place. [2022-07-12 10:34:02,473 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 756 selfloop transitions, 4596 changer transitions 3/5409 dead transitions. [2022-07-12 10:34:02,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 5409 transitions, 163256 flow [2022-07-12 10:34:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-07-12 10:34:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-07-12 10:34:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-07-12 10:34:02,482 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-07-12 10:34:02,482 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-07-12 10:34:02,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-07-12 10:34:02,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:34:02,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-07-12 10:34:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 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) [2022-07-12 10:34:02,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 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) [2022-07-12 10:34:02,509 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 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) [2022-07-12 10:34:02,510 INFO L186 Difference]: Start difference. First operand has 877 places, 3634 transitions, 102351 flow. Second operand 130 states and 8664 transitions. [2022-07-12 10:34:02,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 5409 transitions, 163256 flow [2022-07-12 10:34:31,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 975 places, 5409 transitions, 159081 flow, removed 534 selfloop flow, removed 31 redundant places. [2022-07-12 10:34:31,796 INFO L242 Difference]: Finished difference. Result has 1015 places, 5163 transitions, 157846 flow [2022-07-12 10:34:31,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=99384, PETRI_DIFFERENCE_MINUEND_PLACES=846, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=157846, PETRI_PLACES=1015, PETRI_TRANSITIONS=5163} [2022-07-12 10:34:31,801 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 938 predicate places. [2022-07-12 10:34:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 5163 transitions, 157846 flow [2022-07-12 10:34:31,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 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) [2022-07-12 10:34:31,802 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:34:31,802 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:34:31,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:34:32,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:34:32,026 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:34:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:34:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 641559098, now seen corresponding path program 13 times [2022-07-12 10:34:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:34:32,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892514781] [2022-07-12 10:34:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:34:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:34:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:34:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:32,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:34:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892514781] [2022-07-12 10:34:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892514781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:34:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651390448] [2022-07-12 10:34:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:34:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:34:32,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:34:32,137 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) [2022-07-12 10:34:32,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:34:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:34:32,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:34:32,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:34:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:32,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:34:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:34:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651390448] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:34:32,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:34:32,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 10:34:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047845018] [2022-07-12 10:34:32,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:34:32,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:34:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:34:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:34:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-07-12 10:34:32,419 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-07-12 10:34:32,419 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand has 18 states, 18 states have (on average 65.44444444444444) internal successors, (1178), 18 states have internal predecessors, (1178), 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) [2022-07-12 10:34:32,419 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:34:32,419 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-07-12 10:34:32,420 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:35:31,039 INFO L129 PetriNetUnfolder]: 10147/26155 cut-off events. [2022-07-12 10:35:31,039 INFO L130 PetriNetUnfolder]: For 2118904/2119006 co-relation queries the response was YES. [2022-07-12 10:35:33,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 312909 conditions, 26155 events. 10147/26155 cut-off events. For 2118904/2119006 co-relation queries the response was YES. Maximal size of possible extension queue 1627. Compared 309546 event pairs, 647 based on Foata normal form. 103/25965 useless extension candidates. Maximal degree in co-relation 312372. Up to 3730 conditions per place. [2022-07-12 10:35:33,662 INFO L132 encePairwiseOnDemand]: 75/87 looper letters, 1006 selfloop transitions, 5515 changer transitions 3/6578 dead transitions. [2022-07-12 10:35:33,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 6578 transitions, 213210 flow [2022-07-12 10:35:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-12 10:35:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-12 10:35:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5028 transitions. [2022-07-12 10:35:33,668 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7705747126436782 [2022-07-12 10:35:33,668 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5028 transitions. [2022-07-12 10:35:33,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5028 transitions. [2022-07-12 10:35:33,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:35:33,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5028 transitions. [2022-07-12 10:35:33,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 67.04) internal successors, (5028), 75 states have internal predecessors, (5028), 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) [2022-07-12 10:35:33,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 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) [2022-07-12 10:35:33,682 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 87.0) internal successors, (6612), 76 states have internal predecessors, (6612), 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) [2022-07-12 10:35:33,682 INFO L186 Difference]: Start difference. First operand has 1015 places, 5163 transitions, 157846 flow. Second operand 75 states and 5028 transitions. [2022-07-12 10:35:33,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 6578 transitions, 213210 flow