./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-more-nonblocking-counter-alt2.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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:07:22,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:07:22,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:07:22,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:07:22,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:07:22,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:07:22,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:07:22,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:07:22,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:07:22,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:07:22,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:07:22,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:07:22,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:07:22,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:07:22,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:07:22,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:07:22,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:07:22,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:07:22,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:07:22,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:07:22,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:07:22,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:07:22,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:07:22,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:07:22,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:07:22,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:07:22,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:07:22,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:07:22,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:07:22,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:07:22,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:07:22,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:07:22,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:07:22,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:07:22,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:07:22,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:07:22,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:07:22,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:07:22,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:07:22,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:07:22,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:07:22,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:07:22,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:07:22,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:07:22,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:07:22,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:07:22,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:07:22,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:07:22,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:07:22,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:07:22,807 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:07:22,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:07:22,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:07:22,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:07:22,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:07:22,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:07:22,810 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:07:22,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:07:22,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:07:22,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:07:22,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:07:22,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:07:22,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:07:22,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:07:22,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:07:22,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:07:22,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:07:22,812 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:07:22,812 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:07:22,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:07:22,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:07:22,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2021-12-16 03:07:23,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:07:23,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:07:23,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:07:23,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:07:23,046 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:07:23,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-16 03:07:23,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a1a2d55/ac6d36ed32424c4098bff6ce97ed9397/FLAG5c00698bc [2021-12-16 03:07:23,490 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:07:23,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-16 03:07:23,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a1a2d55/ac6d36ed32424c4098bff6ce97ed9397/FLAG5c00698bc [2021-12-16 03:07:23,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39a1a2d55/ac6d36ed32424c4098bff6ce97ed9397 [2021-12-16 03:07:23,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:07:23,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:07:23,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:07:23,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:07:23,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:07:23,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:07:23" (1/1) ... [2021-12-16 03:07:23,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426aa976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:23, skipping insertion in model container [2021-12-16 03:07:23,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:07:23" (1/1) ... [2021-12-16 03:07:23,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:07:23,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:07:24,110 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-12-16 03:07:24,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:07:24,122 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:07:24,153 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2021-12-16 03:07:24,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:07:24,176 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:07:24,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24 WrapperNode [2021-12-16 03:07:24,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:07:24,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:07:24,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:07:24,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:07:24,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,214 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2021-12-16 03:07:24,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:07:24,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:07:24,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:07:24,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:07:24,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:07:24,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:07:24,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:07:24,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:07:24,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (1/1) ... [2021-12-16 03:07:24,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:07:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:24,333 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) [2021-12-16 03:07:24,335 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 [2021-12-16 03:07:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:07:24,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:07:24,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:07:24,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:07:24,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:07:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:07:24,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:07:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:07:24,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:07:24,375 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:07:24,428 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:07:24,429 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:07:24,566 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:07:24,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:07:24,594 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:07:24,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:07:24 BoogieIcfgContainer [2021-12-16 03:07:24,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:07:24,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:07:24,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:07:24,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:07:24,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:07:23" (1/3) ... [2021-12-16 03:07:24,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5457b1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:07:24, skipping insertion in model container [2021-12-16 03:07:24,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:07:24" (2/3) ... [2021-12-16 03:07:24,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5457b1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:07:24, skipping insertion in model container [2021-12-16 03:07:24,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:07:24" (3/3) ... [2021-12-16 03:07:24,615 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2021-12-16 03:07:24,619 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:07:24,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:07:24,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:07:24,620 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:07:24,643 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,644 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,644 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,644 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,644 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,645 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,646 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,646 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,647 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,647 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,648 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,648 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,649 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,649 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,649 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,649 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,650 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,650 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,651 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,654 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,655 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,655 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,656 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,656 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:07:24,658 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:07:24,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:07:24,717 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:07:24,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:07:24,730 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-12-16 03:07:24,813 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-12-16 03:07:24,814 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:07:24,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2021-12-16 03:07:24,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-12-16 03:07:24,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-12-16 03:07:24,832 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-12-16 03:07:24,834 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:07:24,834 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:24,835 INFO L254 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] [2021-12-16 03:07:24,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 752027129, now seen corresponding path program 1 times [2021-12-16 03:07:24,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598337113] [2021-12-16 03:07:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:24,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:25,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:25,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598337113] [2021-12-16 03:07:25,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598337113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:07:25,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:07:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:07:25,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095234361] [2021-12-16 03:07:25,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:07:25,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:07:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:07:25,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:25,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:25,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:25,156 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:25,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:25,267 INFO L129 PetriNetUnfolder]: 11/116 cut-off events. [2021-12-16 03:07:25,267 INFO L130 PetriNetUnfolder]: For 24/25 co-relation queries the response was YES. [2021-12-16 03:07:25,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 116 events. 11/116 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 196 event pairs, 1 based on Foata normal form. 16/121 useless extension candidates. Maximal degree in co-relation 65. Up to 19 conditions per place. [2021-12-16 03:07:25,269 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 16 selfloop transitions, 2 changer transitions 8/78 dead transitions. [2021-12-16 03:07:25,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 229 flow [2021-12-16 03:07:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:07:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:07:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 468 transitions. [2021-12-16 03:07:25,290 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2021-12-16 03:07:25,292 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 468 transitions. [2021-12-16 03:07:25,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 468 transitions. [2021-12-16 03:07:25,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:25,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 468 transitions. [2021-12-16 03:07:25,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:25,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:25,315 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:25,316 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 7 states and 468 transitions. [2021-12-16 03:07:25,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 229 flow [2021-12-16 03:07:25,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:07:25,322 INFO L242 Difference]: Finished difference. Result has 79 places, 68 transitions, 154 flow [2021-12-16 03:07:25,324 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2021-12-16 03:07:25,329 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-12-16 03:07:25,329 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 154 flow [2021-12-16 03:07:25,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:25,330 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:25,330 INFO L254 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] [2021-12-16 03:07:25,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:07:25,332 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1062198729, now seen corresponding path program 1 times [2021-12-16 03:07:25,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:25,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850478405] [2021-12-16 03:07:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:25,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850478405] [2021-12-16 03:07:25,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850478405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130562495] [2021-12-16 03:07:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:25,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:25,515 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) [2021-12-16 03:07:25,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:07:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:07:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130562495] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:26,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:07:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2021-12-16 03:07:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795613879] [2021-12-16 03:07:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:26,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 03:07:26,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 03:07:26,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:07:26,012 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 84 [2021-12-16 03:07:26,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:26,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 84 [2021-12-16 03:07:26,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:26,082 INFO L129 PetriNetUnfolder]: 41/191 cut-off events. [2021-12-16 03:07:26,082 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-16 03:07:26,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 191 events. 41/191 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 684 event pairs, 8 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 293. Up to 40 conditions per place. [2021-12-16 03:07:26,084 INFO L132 encePairwiseOnDemand]: 79/84 looper letters, 17 selfloop transitions, 5 changer transitions 3/80 dead transitions. [2021-12-16 03:07:26,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 232 flow [2021-12-16 03:07:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 03:07:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-16 03:07:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2021-12-16 03:07:26,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2021-12-16 03:07:26,087 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 290 transitions. [2021-12-16 03:07:26,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 290 transitions. [2021-12-16 03:07:26,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:26,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 290 transitions. [2021-12-16 03:07:26,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,090 INFO L186 Difference]: Start difference. First operand has 79 places, 68 transitions, 154 flow. Second operand 4 states and 290 transitions. [2021-12-16 03:07:26,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 232 flow [2021-12-16 03:07:26,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 226 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-16 03:07:26,092 INFO L242 Difference]: Finished difference. Result has 76 places, 72 transitions, 184 flow [2021-12-16 03:07:26,092 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2021-12-16 03:07:26,093 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2021-12-16 03:07:26,093 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 184 flow [2021-12-16 03:07:26,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:26,094 INFO L254 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] [2021-12-16 03:07:26,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:26,310 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash 328772003, now seen corresponding path program 2 times [2021-12-16 03:07:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:26,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056341920] [2021-12-16 03:07:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:26,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:26,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056341920] [2021-12-16 03:07:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056341920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:07:26,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:07:26,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:07:26,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333931524] [2021-12-16 03:07:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:26,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:07:26,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:07:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:07:26,405 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2021-12-16 03:07:26,406 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,406 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:26,406 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2021-12-16 03:07:26,406 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:26,505 INFO L129 PetriNetUnfolder]: 76/298 cut-off events. [2021-12-16 03:07:26,506 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-12-16 03:07:26,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 298 events. 76/298 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1365 event pairs, 27 based on Foata normal form. 3/297 useless extension candidates. Maximal degree in co-relation 389. Up to 97 conditions per place. [2021-12-16 03:07:26,511 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 29 selfloop transitions, 6 changer transitions 4/91 dead transitions. [2021-12-16 03:07:26,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 321 flow [2021-12-16 03:07:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:07:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:07:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 414 transitions. [2021-12-16 03:07:26,515 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8214285714285714 [2021-12-16 03:07:26,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 414 transitions. [2021-12-16 03:07:26,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 414 transitions. [2021-12-16 03:07:26,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:26,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 414 transitions. [2021-12-16 03:07:26,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 69.0) internal successors, (414), 6 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,522 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,523 INFO L186 Difference]: Start difference. First operand has 76 places, 72 transitions, 184 flow. Second operand 6 states and 414 transitions. [2021-12-16 03:07:26,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 321 flow [2021-12-16 03:07:26,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:07:26,528 INFO L242 Difference]: Finished difference. Result has 84 places, 74 transitions, 223 flow [2021-12-16 03:07:26,528 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2021-12-16 03:07:26,530 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2021-12-16 03:07:26,530 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 223 flow [2021-12-16 03:07:26,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:26,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:26,531 INFO L254 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] [2021-12-16 03:07:26,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:07:26,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1403844751, now seen corresponding path program 3 times [2021-12-16 03:07:26,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12553369] [2021-12-16 03:07:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:26,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:26,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12553369] [2021-12-16 03:07:26,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12553369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225897145] [2021-12-16 03:07:26,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:07:26,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:26,672 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) [2021-12-16 03:07:26,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:07:26,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-16 03:07:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:07:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:07:26,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:07:26,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225897145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:07:26,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:07:27,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-12-16 03:07:27,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855370578] [2021-12-16 03:07:27,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:07:27,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:07:27,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:07:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:07:27,004 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2021-12-16 03:07:27,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:27,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:27,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2021-12-16 03:07:27,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:27,156 INFO L129 PetriNetUnfolder]: 47/191 cut-off events. [2021-12-16 03:07:27,156 INFO L130 PetriNetUnfolder]: For 175/181 co-relation queries the response was YES. [2021-12-16 03:07:27,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 191 events. 47/191 cut-off events. For 175/181 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 713 event pairs, 19 based on Foata normal form. 7/192 useless extension candidates. Maximal degree in co-relation 261. Up to 65 conditions per place. [2021-12-16 03:07:27,158 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 22 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2021-12-16 03:07:27,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 302 flow [2021-12-16 03:07:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:07:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:07:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2021-12-16 03:07:27,160 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2021-12-16 03:07:27,160 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2021-12-16 03:07:27,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2021-12-16 03:07:27,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:27,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2021-12-16 03:07:27,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:27,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:27,164 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:27,165 INFO L186 Difference]: Start difference. First operand has 84 places, 74 transitions, 223 flow. Second operand 8 states and 482 transitions. [2021-12-16 03:07:27,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 302 flow [2021-12-16 03:07:27,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 281 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-12-16 03:07:27,168 INFO L242 Difference]: Finished difference. Result has 85 places, 73 transitions, 216 flow [2021-12-16 03:07:27,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2021-12-16 03:07:27,169 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 11 predicate places. [2021-12-16 03:07:27,169 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 216 flow [2021-12-16 03:07:27,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:27,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:27,170 INFO L254 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] [2021-12-16 03:07:27,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 03:07:27,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1446280427, now seen corresponding path program 1 times [2021-12-16 03:07:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280118805] [2021-12-16 03:07:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:27,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:27,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280118805] [2021-12-16 03:07:27,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280118805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225215255] [2021-12-16 03:07:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:27,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:27,584 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) [2021-12-16 03:07:27,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:07:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:27,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:27,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:28,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225215255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:28,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:28,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 13 [2021-12-16 03:07:28,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650152933] [2021-12-16 03:07:28,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:28,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 03:07:28,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 03:07:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-16 03:07:28,047 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-16 03:07:28,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 216 flow. Second operand has 13 states, 13 states have (on average 56.92307692307692) internal successors, (740), 13 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:28,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:28,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-16 03:07:28,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:28,330 INFO L129 PetriNetUnfolder]: 143/541 cut-off events. [2021-12-16 03:07:28,331 INFO L130 PetriNetUnfolder]: For 535/535 co-relation queries the response was YES. [2021-12-16 03:07:28,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1306 conditions, 541 events. 143/541 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3088 event pairs, 4 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 836. Up to 86 conditions per place. [2021-12-16 03:07:28,337 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 69 selfloop transitions, 20 changer transitions 21/153 dead transitions. [2021-12-16 03:07:28,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 793 flow [2021-12-16 03:07:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 03:07:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-16 03:07:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 954 transitions. [2021-12-16 03:07:28,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7098214285714286 [2021-12-16 03:07:28,341 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 954 transitions. [2021-12-16 03:07:28,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 954 transitions. [2021-12-16 03:07:28,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:28,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 954 transitions. [2021-12-16 03:07:28,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.625) internal successors, (954), 16 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:28,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:28,349 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:28,349 INFO L186 Difference]: Start difference. First operand has 85 places, 73 transitions, 216 flow. Second operand 16 states and 954 transitions. [2021-12-16 03:07:28,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 793 flow [2021-12-16 03:07:28,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 754 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-16 03:07:28,356 INFO L242 Difference]: Finished difference. Result has 103 places, 88 transitions, 376 flow [2021-12-16 03:07:28,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=376, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2021-12-16 03:07:28,358 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 29 predicate places. [2021-12-16 03:07:28,359 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 376 flow [2021-12-16 03:07:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.92307692307692) internal successors, (740), 13 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:28,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:28,359 INFO L254 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] [2021-12-16 03:07:28,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:28,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:28,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1471227095, now seen corresponding path program 2 times [2021-12-16 03:07:28,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:28,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981437327] [2021-12-16 03:07:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:28,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:28,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:28,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981437327] [2021-12-16 03:07:28,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981437327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:28,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009364305] [2021-12-16 03:07:28,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:07:28,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:28,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:28,684 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) [2021-12-16 03:07:28,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:07:28,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:07:28,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 03:07:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:28,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:29,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009364305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:29,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:29,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-16 03:07:29,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828704431] [2021-12-16 03:07:29,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:29,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 03:07:29,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:29,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 03:07:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:07:29,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2021-12-16 03:07:29,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 376 flow. Second operand has 14 states, 14 states have (on average 62.642857142857146) internal successors, (877), 14 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:29,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:29,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2021-12-16 03:07:29,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:29,460 INFO L129 PetriNetUnfolder]: 218/623 cut-off events. [2021-12-16 03:07:29,461 INFO L130 PetriNetUnfolder]: For 1095/1095 co-relation queries the response was YES. [2021-12-16 03:07:29,463 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 623 events. 218/623 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3403 event pairs, 35 based on Foata normal form. 20/636 useless extension candidates. Maximal degree in co-relation 1905. Up to 223 conditions per place. [2021-12-16 03:07:29,466 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 56 selfloop transitions, 29 changer transitions 5/138 dead transitions. [2021-12-16 03:07:29,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 138 transitions, 840 flow [2021-12-16 03:07:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:07:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:07:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 725 transitions. [2021-12-16 03:07:29,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7846320346320347 [2021-12-16 03:07:29,469 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 725 transitions. [2021-12-16 03:07:29,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 725 transitions. [2021-12-16 03:07:29,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:29,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 725 transitions. [2021-12-16 03:07:29,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 65.9090909090909) internal successors, (725), 11 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:29,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:29,475 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:29,475 INFO L186 Difference]: Start difference. First operand has 103 places, 88 transitions, 376 flow. Second operand 11 states and 725 transitions. [2021-12-16 03:07:29,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 138 transitions, 840 flow [2021-12-16 03:07:29,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 138 transitions, 796 flow, removed 17 selfloop flow, removed 7 redundant places. [2021-12-16 03:07:29,481 INFO L242 Difference]: Finished difference. Result has 110 places, 105 transitions, 608 flow [2021-12-16 03:07:29,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=608, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2021-12-16 03:07:29,483 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 36 predicate places. [2021-12-16 03:07:29,484 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 608 flow [2021-12-16 03:07:29,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.642857142857146) internal successors, (877), 14 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:29,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:29,484 INFO L254 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] [2021-12-16 03:07:29,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:29,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 876671123, now seen corresponding path program 3 times [2021-12-16 03:07:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:29,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211358722] [2021-12-16 03:07:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:29,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:29,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:29,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211358722] [2021-12-16 03:07:29,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211358722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:29,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119505594] [2021-12-16 03:07:29,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:07:29,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:29,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:29,865 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) [2021-12-16 03:07:29,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:07:29,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:07:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:07:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:30,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:30,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119505594] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:30,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:30,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 19 [2021-12-16 03:07:30,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145147213] [2021-12-16 03:07:30,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:30,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:07:30,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:07:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:07:30,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-16 03:07:30,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 608 flow. Second operand has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:30,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:30,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-16 03:07:30,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:31,800 INFO L129 PetriNetUnfolder]: 451/1130 cut-off events. [2021-12-16 03:07:31,801 INFO L130 PetriNetUnfolder]: For 5304/5315 co-relation queries the response was YES. [2021-12-16 03:07:31,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 1130 events. 451/1130 cut-off events. For 5304/5315 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6735 event pairs, 9 based on Foata normal form. 26/1152 useless extension candidates. Maximal degree in co-relation 4651. Up to 260 conditions per place. [2021-12-16 03:07:31,810 INFO L132 encePairwiseOnDemand]: 73/84 looper letters, 143 selfloop transitions, 180 changer transitions 7/371 dead transitions. [2021-12-16 03:07:31,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 371 transitions, 4069 flow [2021-12-16 03:07:31,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 03:07:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-16 03:07:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2338 transitions. [2021-12-16 03:07:31,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2021-12-16 03:07:31,817 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2338 transitions. [2021-12-16 03:07:31,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2338 transitions. [2021-12-16 03:07:31,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:31,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2338 transitions. [2021-12-16 03:07:31,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.666666666666664) internal successors, (2338), 42 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:31,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:31,827 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:31,827 INFO L186 Difference]: Start difference. First operand has 110 places, 105 transitions, 608 flow. Second operand 42 states and 2338 transitions. [2021-12-16 03:07:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 371 transitions, 4069 flow [2021-12-16 03:07:31,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 371 transitions, 4021 flow, removed 22 selfloop flow, removed 1 redundant places. [2021-12-16 03:07:31,842 INFO L242 Difference]: Finished difference. Result has 182 places, 294 transitions, 3508 flow [2021-12-16 03:07:31,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3508, PETRI_PLACES=182, PETRI_TRANSITIONS=294} [2021-12-16 03:07:31,844 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 108 predicate places. [2021-12-16 03:07:31,844 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 294 transitions, 3508 flow [2021-12-16 03:07:31,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.8421052631579) internal successors, (1023), 19 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:31,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:31,845 INFO L254 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] [2021-12-16 03:07:31,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:32,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:32,063 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1484681127, now seen corresponding path program 4 times [2021-12-16 03:07:32,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587651207] [2021-12-16 03:07:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:32,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:32,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:32,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587651207] [2021-12-16 03:07:32,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587651207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748645019] [2021-12-16 03:07:32,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:07:32,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:32,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:32,213 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) [2021-12-16 03:07:32,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:07:32,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:07:32,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:32,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748645019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:32,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:32,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2021-12-16 03:07:32,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629804649] [2021-12-16 03:07:32,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:32,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:07:32,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:07:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:07:32,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:32,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 294 transitions, 3508 flow. Second operand has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:32,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:32,823 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:32,823 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:33,590 INFO L129 PetriNetUnfolder]: 603/1576 cut-off events. [2021-12-16 03:07:33,590 INFO L130 PetriNetUnfolder]: For 19707/19713 co-relation queries the response was YES. [2021-12-16 03:07:33,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9045 conditions, 1576 events. 603/1576 cut-off events. For 19707/19713 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10642 event pairs, 16 based on Foata normal form. 7/1580 useless extension candidates. Maximal degree in co-relation 8791. Up to 391 conditions per place. [2021-12-16 03:07:33,610 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 176 selfloop transitions, 239 changer transitions 34/519 dead transitions. [2021-12-16 03:07:33,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 519 transitions, 7735 flow [2021-12-16 03:07:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 03:07:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-16 03:07:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1392 transitions. [2021-12-16 03:07:33,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7891156462585034 [2021-12-16 03:07:33,620 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1392 transitions. [2021-12-16 03:07:33,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1392 transitions. [2021-12-16 03:07:33,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:33,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1392 transitions. [2021-12-16 03:07:33,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.28571428571429) internal successors, (1392), 21 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:33,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:33,627 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:33,627 INFO L186 Difference]: Start difference. First operand has 182 places, 294 transitions, 3508 flow. Second operand 21 states and 1392 transitions. [2021-12-16 03:07:33,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 519 transitions, 7735 flow [2021-12-16 03:07:33,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 519 transitions, 7329 flow, removed 150 selfloop flow, removed 4 redundant places. [2021-12-16 03:07:33,744 INFO L242 Difference]: Finished difference. Result has 209 places, 431 transitions, 6426 flow [2021-12-16 03:07:33,745 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6426, PETRI_PLACES=209, PETRI_TRANSITIONS=431} [2021-12-16 03:07:33,745 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 135 predicate places. [2021-12-16 03:07:33,745 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 431 transitions, 6426 flow [2021-12-16 03:07:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.05263157894737) internal successors, (1217), 19 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:33,746 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:33,746 INFO L254 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] [2021-12-16 03:07:33,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:33,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:33,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash -839699611, now seen corresponding path program 5 times [2021-12-16 03:07:33,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779225438] [2021-12-16 03:07:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:33,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:34,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779225438] [2021-12-16 03:07:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779225438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203332562] [2021-12-16 03:07:34,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:07:34,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:34,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:34,087 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) [2021-12-16 03:07:34,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:07:34,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-16 03:07:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:07:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:34,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:34,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203332562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:34,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:34,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2021-12-16 03:07:34,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301887817] [2021-12-16 03:07:34,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:07:34,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:07:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:07:34,693 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:34,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 431 transitions, 6426 flow. Second operand has 21 states, 21 states have (on average 63.857142857142854) internal successors, (1341), 21 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:34,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:34,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:34,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:36,675 INFO L129 PetriNetUnfolder]: 763/2082 cut-off events. [2021-12-16 03:07:36,676 INFO L130 PetriNetUnfolder]: For 34508/34521 co-relation queries the response was YES. [2021-12-16 03:07:36,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12895 conditions, 2082 events. 763/2082 cut-off events. For 34508/34521 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15512 event pairs, 13 based on Foata normal form. 13/2079 useless extension candidates. Maximal degree in co-relation 12609. Up to 519 conditions per place. [2021-12-16 03:07:36,709 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 119 selfloop transitions, 527 changer transitions 20/736 dead transitions. [2021-12-16 03:07:36,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 736 transitions, 12997 flow [2021-12-16 03:07:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-16 03:07:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-12-16 03:07:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3395 transitions. [2021-12-16 03:07:36,714 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7772435897435898 [2021-12-16 03:07:36,714 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3395 transitions. [2021-12-16 03:07:36,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3395 transitions. [2021-12-16 03:07:36,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:36,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3395 transitions. [2021-12-16 03:07:36,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 65.28846153846153) internal successors, (3395), 52 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:36,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:36,729 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 84.0) internal successors, (4452), 53 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:36,730 INFO L186 Difference]: Start difference. First operand has 209 places, 431 transitions, 6426 flow. Second operand 52 states and 3395 transitions. [2021-12-16 03:07:36,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 736 transitions, 12997 flow [2021-12-16 03:07:36,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 736 transitions, 12564 flow, removed 191 selfloop flow, removed 4 redundant places. [2021-12-16 03:07:36,886 INFO L242 Difference]: Finished difference. Result has 265 places, 675 transitions, 11972 flow [2021-12-16 03:07:36,887 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=11972, PETRI_PLACES=265, PETRI_TRANSITIONS=675} [2021-12-16 03:07:36,887 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 191 predicate places. [2021-12-16 03:07:36,888 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 675 transitions, 11972 flow [2021-12-16 03:07:36,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.857142857142854) internal successors, (1341), 21 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:36,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:36,888 INFO L254 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] [2021-12-16 03:07:36,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:37,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:37,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1066973279, now seen corresponding path program 6 times [2021-12-16 03:07:37,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:37,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878268873] [2021-12-16 03:07:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:37,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:37,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:37,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878268873] [2021-12-16 03:07:37,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878268873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:37,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872166221] [2021-12-16 03:07:37,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:07:37,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:37,228 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) [2021-12-16 03:07:37,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:07:37,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-16 03:07:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:07:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:37,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:37,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872166221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:37,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:37,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 22 [2021-12-16 03:07:37,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759429004] [2021-12-16 03:07:37,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:37,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 03:07:37,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 03:07:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-12-16 03:07:37,882 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-16 03:07:37,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 675 transitions, 11972 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:37,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:37,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-16 03:07:37,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:40,333 INFO L129 PetriNetUnfolder]: 831/2310 cut-off events. [2021-12-16 03:07:40,334 INFO L130 PetriNetUnfolder]: For 40150/40150 co-relation queries the response was YES. [2021-12-16 03:07:40,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15649 conditions, 2310 events. 831/2310 cut-off events. For 40150/40150 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17722 event pairs, 12 based on Foata normal form. 14/2317 useless extension candidates. Maximal degree in co-relation 15406. Up to 545 conditions per place. [2021-12-16 03:07:40,366 INFO L132 encePairwiseOnDemand]: 72/84 looper letters, 198 selfloop transitions, 656 changer transitions 19/914 dead transitions. [2021-12-16 03:07:40,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 914 transitions, 17372 flow [2021-12-16 03:07:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 03:07:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-16 03:07:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2603 transitions. [2021-12-16 03:07:40,370 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6593211752786221 [2021-12-16 03:07:40,370 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2603 transitions. [2021-12-16 03:07:40,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2603 transitions. [2021-12-16 03:07:40,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:40,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2603 transitions. [2021-12-16 03:07:40,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.38297872340426) internal successors, (2603), 47 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:40,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:40,379 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:40,379 INFO L186 Difference]: Start difference. First operand has 265 places, 675 transitions, 11972 flow. Second operand 47 states and 2603 transitions. [2021-12-16 03:07:40,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 914 transitions, 17372 flow [2021-12-16 03:07:40,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 914 transitions, 16269 flow, removed 502 selfloop flow, removed 13 redundant places. [2021-12-16 03:07:40,580 INFO L242 Difference]: Finished difference. Result has 316 places, 827 transitions, 15836 flow [2021-12-16 03:07:40,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=11146, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15836, PETRI_PLACES=316, PETRI_TRANSITIONS=827} [2021-12-16 03:07:40,582 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 242 predicate places. [2021-12-16 03:07:40,582 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 827 transitions, 15836 flow [2021-12-16 03:07:40,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:40,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:40,583 INFO L254 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] [2021-12-16 03:07:40,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:40,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 03:07:40,800 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 89560977, now seen corresponding path program 7 times [2021-12-16 03:07:40,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:40,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518304657] [2021-12-16 03:07:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:40,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:40,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518304657] [2021-12-16 03:07:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518304657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582927894] [2021-12-16 03:07:40,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 03:07:40,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:40,942 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) [2021-12-16 03:07:40,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:07:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:41,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582927894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:41,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:41,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2021-12-16 03:07:41,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446448355] [2021-12-16 03:07:41,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:07:41,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:07:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:07:41,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:41,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 827 transitions, 15836 flow. Second operand has 19 states, 19 states have (on average 64.26315789473684) internal successors, (1221), 19 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:41,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:41,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:41,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:46,685 INFO L129 PetriNetUnfolder]: 1160/3432 cut-off events. [2021-12-16 03:07:46,685 INFO L130 PetriNetUnfolder]: For 46153/46174 co-relation queries the response was YES. [2021-12-16 03:07:46,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23547 conditions, 3432 events. 1160/3432 cut-off events. For 46153/46174 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 29776 event pairs, 18 based on Foata normal form. 20/3438 useless extension candidates. Maximal degree in co-relation 23181. Up to 839 conditions per place. [2021-12-16 03:07:46,743 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 298 selfloop transitions, 975 changer transitions 9/1358 dead transitions. [2021-12-16 03:07:46,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1358 transitions, 26627 flow [2021-12-16 03:07:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-16 03:07:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-12-16 03:07:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 6362 transitions. [2021-12-16 03:07:46,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7808051055473736 [2021-12-16 03:07:46,749 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 6362 transitions. [2021-12-16 03:07:46,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 6362 transitions. [2021-12-16 03:07:46,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:46,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 6362 transitions. [2021-12-16 03:07:46,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 65.58762886597938) internal successors, (6362), 97 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:46,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 84.0) internal successors, (8232), 98 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:46,787 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 84.0) internal successors, (8232), 98 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:46,787 INFO L186 Difference]: Start difference. First operand has 316 places, 827 transitions, 15836 flow. Second operand 97 states and 6362 transitions. [2021-12-16 03:07:46,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1358 transitions, 26627 flow [2021-12-16 03:07:47,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1358 transitions, 25488 flow, removed 239 selfloop flow, removed 18 redundant places. [2021-12-16 03:07:47,238 INFO L242 Difference]: Finished difference. Result has 403 places, 1207 transitions, 24568 flow [2021-12-16 03:07:47,239 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=15057, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=24568, PETRI_PLACES=403, PETRI_TRANSITIONS=1207} [2021-12-16 03:07:47,240 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 329 predicate places. [2021-12-16 03:07:47,240 INFO L470 AbstractCegarLoop]: Abstraction has has 403 places, 1207 transitions, 24568 flow [2021-12-16 03:07:47,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.26315789473684) internal successors, (1221), 19 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:47,241 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:47,241 INFO L254 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] [2021-12-16 03:07:47,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 03:07:47,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:47,456 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:47,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash -336423823, now seen corresponding path program 8 times [2021-12-16 03:07:47,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48553881] [2021-12-16 03:07:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:47,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:47,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48553881] [2021-12-16 03:07:47,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48553881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729167292] [2021-12-16 03:07:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:07:47,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:47,604 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) [2021-12-16 03:07:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:07:47,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:07:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:47,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:48,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729167292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:48,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:48,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-16 03:07:48,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110392511] [2021-12-16 03:07:48,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:48,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:07:48,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:07:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:07:48,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:48,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1207 transitions, 24568 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:48,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:48,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:48,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:50,906 INFO L129 PetriNetUnfolder]: 1501/4533 cut-off events. [2021-12-16 03:07:50,906 INFO L130 PetriNetUnfolder]: For 64318/64347 co-relation queries the response was YES. [2021-12-16 03:07:50,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32898 conditions, 4533 events. 1501/4533 cut-off events. For 64318/64347 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 41976 event pairs, 33 based on Foata normal form. 40/4562 useless extension candidates. Maximal degree in co-relation 32124. Up to 1067 conditions per place. [2021-12-16 03:07:50,985 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 403 selfloop transitions, 1162 changer transitions 0/1641 dead transitions. [2021-12-16 03:07:51,003 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1641 transitions, 36254 flow [2021-12-16 03:07:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-16 03:07:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-16 03:07:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2526 transitions. [2021-12-16 03:07:51,006 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7913533834586466 [2021-12-16 03:07:51,006 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2526 transitions. [2021-12-16 03:07:51,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2526 transitions. [2021-12-16 03:07:51,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:51,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2526 transitions. [2021-12-16 03:07:51,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 66.47368421052632) internal successors, (2526), 38 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:51,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:51,012 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:51,012 INFO L186 Difference]: Start difference. First operand has 403 places, 1207 transitions, 24568 flow. Second operand 38 states and 2526 transitions. [2021-12-16 03:07:51,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1641 transitions, 36254 flow [2021-12-16 03:07:51,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1641 transitions, 35263 flow, removed 209 selfloop flow, removed 20 redundant places. [2021-12-16 03:07:51,752 INFO L242 Difference]: Finished difference. Result has 439 places, 1515 transitions, 35382 flow [2021-12-16 03:07:51,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=23854, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=873, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=35382, PETRI_PLACES=439, PETRI_TRANSITIONS=1515} [2021-12-16 03:07:51,753 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 365 predicate places. [2021-12-16 03:07:51,753 INFO L470 AbstractCegarLoop]: Abstraction has has 439 places, 1515 transitions, 35382 flow [2021-12-16 03:07:51,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:51,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:51,754 INFO L254 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] [2021-12-16 03:07:51,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 03:07:51,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 03:07:51,966 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2071907311, now seen corresponding path program 9 times [2021-12-16 03:07:51,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:51,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162502018] [2021-12-16 03:07:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:51,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:52,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:52,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162502018] [2021-12-16 03:07:52,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162502018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:52,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112964520] [2021-12-16 03:07:52,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:07:52,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:52,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:52,109 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) [2021-12-16 03:07:52,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:07:52,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:07:52,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:52,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:07:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:52,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:07:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:52,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112964520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:07:52,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:07:52,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-16 03:07:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98540086] [2021-12-16 03:07:52,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:07:52,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:07:52,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:07:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:07:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:07:52,770 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:07:52,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1515 transitions, 35382 flow. Second operand has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:52,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:07:52,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:07:52,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:07:58,005 INFO L129 PetriNetUnfolder]: 2055/6361 cut-off events. [2021-12-16 03:07:58,006 INFO L130 PetriNetUnfolder]: For 112066/112103 co-relation queries the response was YES. [2021-12-16 03:07:58,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49326 conditions, 6361 events. 2055/6361 cut-off events. For 112066/112103 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 64288 event pairs, 28 based on Foata normal form. 70/6416 useless extension candidates. Maximal degree in co-relation 48469. Up to 1306 conditions per place. [2021-12-16 03:07:58,102 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 302 selfloop transitions, 1772 changer transitions 0/2150 dead transitions. [2021-12-16 03:07:58,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2150 transitions, 53447 flow [2021-12-16 03:07:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 03:07:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-16 03:07:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3844 transitions. [2021-12-16 03:07:58,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7889983579638752 [2021-12-16 03:07:58,106 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3844 transitions. [2021-12-16 03:07:58,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3844 transitions. [2021-12-16 03:07:58,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:07:58,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3844 transitions. [2021-12-16 03:07:58,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 66.27586206896552) internal successors, (3844), 58 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:58,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:58,116 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:58,116 INFO L186 Difference]: Start difference. First operand has 439 places, 1515 transitions, 35382 flow. Second operand 58 states and 3844 transitions. [2021-12-16 03:07:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2150 transitions, 53447 flow [2021-12-16 03:07:59,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 2150 transitions, 53245 flow, removed 74 selfloop flow, removed 5 redundant places. [2021-12-16 03:07:59,590 INFO L242 Difference]: Finished difference. Result has 512 places, 2057 transitions, 54621 flow [2021-12-16 03:07:59,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=35228, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=54621, PETRI_PLACES=512, PETRI_TRANSITIONS=2057} [2021-12-16 03:07:59,592 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 438 predicate places. [2021-12-16 03:07:59,592 INFO L470 AbstractCegarLoop]: Abstraction has has 512 places, 2057 transitions, 54621 flow [2021-12-16 03:07:59,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:07:59,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:07:59,593 INFO L254 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] [2021-12-16 03:07:59,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-16 03:07:59,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 03:07:59,810 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:07:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:07:59,811 INFO L85 PathProgramCache]: Analyzing trace with hash 258264347, now seen corresponding path program 10 times [2021-12-16 03:07:59,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:07:59,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643021995] [2021-12-16 03:07:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:07:59,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:07:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:07:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:07:59,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:07:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643021995] [2021-12-16 03:07:59,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643021995] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:07:59,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195847193] [2021-12-16 03:07:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:07:59,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:07:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:07:59,934 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) [2021-12-16 03:07:59,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:07:59,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:07:59,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:07:59,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 03:07:59,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:00,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195847193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:00,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:00,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2021-12-16 03:08:00,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17687222] [2021-12-16 03:08:00,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:00,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:08:00,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:08:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:08:00,605 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:08:00,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 2057 transitions, 54621 flow. Second operand has 21 states, 21 states have (on average 64.38095238095238) internal successors, (1352), 21 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:00,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:00,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:08:00,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:07,706 INFO L129 PetriNetUnfolder]: 2708/8974 cut-off events. [2021-12-16 03:08:07,706 INFO L130 PetriNetUnfolder]: For 187457/187505 co-relation queries the response was YES. [2021-12-16 03:08:07,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75605 conditions, 8974 events. 2708/8974 cut-off events. For 187457/187505 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 99344 event pairs, 77 based on Foata normal form. 52/9006 useless extension candidates. Maximal degree in co-relation 74729. Up to 1679 conditions per place. [2021-12-16 03:08:07,865 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 502 selfloop transitions, 2138 changer transitions 6/2722 dead transitions. [2021-12-16 03:08:07,866 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 2722 transitions, 77804 flow [2021-12-16 03:08:07,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-16 03:08:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-16 03:08:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3563 transitions. [2021-12-16 03:08:07,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7854938271604939 [2021-12-16 03:08:07,869 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3563 transitions. [2021-12-16 03:08:07,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3563 transitions. [2021-12-16 03:08:07,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:07,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3563 transitions. [2021-12-16 03:08:07,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 65.98148148148148) internal successors, (3563), 54 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:07,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:07,878 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:07,878 INFO L186 Difference]: Start difference. First operand has 512 places, 2057 transitions, 54621 flow. Second operand 54 states and 3563 transitions. [2021-12-16 03:08:07,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 2722 transitions, 77804 flow [2021-12-16 03:08:11,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 2722 transitions, 76910 flow, removed 183 selfloop flow, removed 10 redundant places. [2021-12-16 03:08:11,182 INFO L242 Difference]: Finished difference. Result has 574 places, 2597 transitions, 78011 flow [2021-12-16 03:08:11,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=53998, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=78011, PETRI_PLACES=574, PETRI_TRANSITIONS=2597} [2021-12-16 03:08:11,186 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 500 predicate places. [2021-12-16 03:08:11,186 INFO L470 AbstractCegarLoop]: Abstraction has has 574 places, 2597 transitions, 78011 flow [2021-12-16 03:08:11,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.38095238095238) internal successors, (1352), 21 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:11,187 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:11,187 INFO L254 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] [2021-12-16 03:08:11,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:11,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 03:08:11,399 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 744265635, now seen corresponding path program 11 times [2021-12-16 03:08:11,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395471977] [2021-12-16 03:08:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:11,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395471977] [2021-12-16 03:08:11,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395471977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387892578] [2021-12-16 03:08:11,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:08:11,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:11,551 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) [2021-12-16 03:08:11,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 03:08:11,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 03:08:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:12,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387892578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:12,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:12,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2021-12-16 03:08:12,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146165964] [2021-12-16 03:08:12,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:12,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 03:08:12,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 03:08:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-16 03:08:12,185 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2021-12-16 03:08:12,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 2597 transitions, 78011 flow. Second operand has 21 states, 21 states have (on average 64.14285714285714) internal successors, (1347), 21 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:12,186 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:12,186 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2021-12-16 03:08:12,187 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:23,364 INFO L129 PetriNetUnfolder]: 3157/10549 cut-off events. [2021-12-16 03:08:23,364 INFO L130 PetriNetUnfolder]: For 273258/273336 co-relation queries the response was YES. [2021-12-16 03:08:23,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 96552 conditions, 10549 events. 3157/10549 cut-off events. For 273258/273336 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 121125 event pairs, 51 based on Foata normal form. 65/10596 useless extension candidates. Maximal degree in co-relation 95933. Up to 2000 conditions per place. [2021-12-16 03:08:23,637 INFO L132 encePairwiseOnDemand]: 71/84 looper letters, 207 selfloop transitions, 2907 changer transitions 5/3195 dead transitions. [2021-12-16 03:08:23,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 3195 transitions, 101119 flow [2021-12-16 03:08:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 03:08:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-12-16 03:08:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4047 transitions. [2021-12-16 03:08:23,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.777073732718894 [2021-12-16 03:08:23,654 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4047 transitions. [2021-12-16 03:08:23,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4047 transitions. [2021-12-16 03:08:23,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:23,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4047 transitions. [2021-12-16 03:08:23,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 65.2741935483871) internal successors, (4047), 62 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:23,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:23,672 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:23,672 INFO L186 Difference]: Start difference. First operand has 574 places, 2597 transitions, 78011 flow. Second operand 62 states and 4047 transitions. [2021-12-16 03:08:23,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 3195 transitions, 101119 flow [2021-12-16 03:08:28,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 3195 transitions, 100635 flow, removed 77 selfloop flow, removed 17 redundant places.