./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/mult-comm.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 a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:17:30,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:17:30,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:17:30,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:17:30,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:17:30,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:17:30,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:17:30,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:17:30,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:17:30,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:17:30,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:17:30,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:17:30,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:17:30,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:17:30,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:17:30,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:17:30,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:17:30,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:17:30,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:17:30,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:17:30,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:17:30,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:17:30,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:17:30,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:17:30,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:17:30,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:17:30,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:17:30,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:17:30,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:17:30,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:17:30,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:17:30,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:17:30,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:17:30,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:17:30,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:17:30,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:17:30,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:17:30,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:17:30,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:17:30,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:17:30,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:17:30,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:17:30,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:17:30,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:17:30,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:17:30,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:17:30,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:17:30,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:17:30,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:17:30,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:17:30,749 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:17:30,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:17:30,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:17:30,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:17:30,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:17:30,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:17:30,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:17:30,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:17:30,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:17:30,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:17:30,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:17:30,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:30,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:17:30,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:17:30,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:17:30,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:17:30,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0efdc82161997cbf03fd7c104a0f7adcc3337af1f91e29fd2b7831e9d52958e [2021-12-21 15:17:30,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:17:30,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:17:30,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:17:30,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:17:30,955 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:17:30,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-12-21 15:17:30,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9092999ec/9c3a5a63e6a34c1fae4b56b830f90d8b/FLAGfcdf51dae [2021-12-21 15:17:31,352 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:17:31,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2021-12-21 15:17:31,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9092999ec/9c3a5a63e6a34c1fae4b56b830f90d8b/FLAGfcdf51dae [2021-12-21 15:17:31,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9092999ec/9c3a5a63e6a34c1fae4b56b830f90d8b [2021-12-21 15:17:31,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:17:31,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:17:31,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:31,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:17:31,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:17:31,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44171661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31, skipping insertion in model container [2021-12-21 15:17:31,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:17:31,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:17:31,527 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/mult-comm.wvr.c[1910,1923] [2021-12-21 15:17:31,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:31,534 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:17:31,551 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/mult-comm.wvr.c[1910,1923] [2021-12-21 15:17:31,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:17:31,564 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:17:31,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31 WrapperNode [2021-12-21 15:17:31,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:17:31,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:31,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:17:31,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:17:31,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,585 INFO L137 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2021-12-21 15:17:31,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:17:31,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:17:31,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:17:31,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:17:31,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:17:31,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:17:31,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:17:31,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:17:31,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (1/1) ... [2021-12-21 15:17:31,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:17:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:31,629 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) [2021-12-21 15:17:31,635 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 [2021-12-21 15:17:31,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:17:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:17:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:17:31,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:17:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:17:31,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:17:31,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:17:31,663 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:17:31,715 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:17:31,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:17:31,835 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:17:31,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:17:31,841 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:17:31,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:31 BoogieIcfgContainer [2021-12-21 15:17:31,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:17:31,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:17:31,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:17:31,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:17:31,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:17:31" (1/3) ... [2021-12-21 15:17:31,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28053e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:31, skipping insertion in model container [2021-12-21 15:17:31,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:17:31" (2/3) ... [2021-12-21 15:17:31,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28053e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:17:31, skipping insertion in model container [2021-12-21 15:17:31,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:17:31" (3/3) ... [2021-12-21 15:17:31,849 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2021-12-21 15:17:31,854 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:17:31,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:17:31,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:17:31,854 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:17:31,907 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,914 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,914 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,915 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,915 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,916 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,916 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,917 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,917 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,917 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,918 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,918 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,918 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,919 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,919 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,919 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,920 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,921 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,921 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,922 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,922 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,923 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,924 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,926 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,927 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,927 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,939 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,939 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,939 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,940 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:17:31,943 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:17:31,991 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:17:31,997 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 [2021-12-21 15:17:31,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:17:32,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 176 flow [2021-12-21 15:17:32,056 INFO L129 PetriNetUnfolder]: 5/78 cut-off events. [2021-12-21 15:17:32,057 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:17:32,059 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 5/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-12-21 15:17:32,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 176 flow [2021-12-21 15:17:32,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 150 flow [2021-12-21 15:17:32,085 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-21 15:17:32,086 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:17:32,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,087 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] [2021-12-21 15:17:32,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1776550383, now seen corresponding path program 1 times [2021-12-21 15:17:32,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641550440] [2021-12-21 15:17:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641550440] [2021-12-21 15:17:32,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641550440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:32,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:32,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:17:32,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874100133] [2021-12-21 15:17:32,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:32,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:17:32,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:17:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:17:32,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 80 [2021-12-21 15:17:32,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:32,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 80 [2021-12-21 15:17:32,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:32,344 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2021-12-21 15:17:32,348 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-21 15:17:32,348 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 5/68 useless extension candidates. Maximal degree in co-relation 43. Up to 5 conditions per place. [2021-12-21 15:17:32,350 INFO L132 encePairwiseOnDemand]: 77/80 looper letters, 4 selfloop transitions, 0 changer transitions 1/66 dead transitions. [2021-12-21 15:17:32,350 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2021-12-21 15:17:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:17:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:17:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 151 transitions. [2021-12-21 15:17:32,362 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.94375 [2021-12-21 15:17:32,362 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 151 transitions. [2021-12-21 15:17:32,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 151 transitions. [2021-12-21 15:17:32,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:32,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 151 transitions. [2021-12-21 15:17:32,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 75.5) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,376 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,379 INFO L186 Difference]: Start difference. First operand has 71 places, 69 transitions, 150 flow. Second operand 2 states and 151 transitions. [2021-12-21 15:17:32,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2021-12-21 15:17:32,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:17:32,389 INFO L242 Difference]: Finished difference. Result has 68 places, 65 transitions, 134 flow [2021-12-21 15:17:32,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2021-12-21 15:17:32,394 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2021-12-21 15:17:32,395 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 134 flow [2021-12-21 15:17:32,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,395 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] [2021-12-21 15:17:32,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:17:32,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1061161231, now seen corresponding path program 1 times [2021-12-21 15:17:32,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407779725] [2021-12-21 15:17:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407779725] [2021-12-21 15:17:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407779725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:17:32,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:17:32,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:17:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624593313] [2021-12-21 15:17:32,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:17:32,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:17:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:17:32,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 80 [2021-12-21 15:17:32,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,557 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:32,557 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 80 [2021-12-21 15:17:32,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:32,643 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2021-12-21 15:17:32,643 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-21 15:17:32,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 126 events. 12/126 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 298 event pairs, 1 based on Foata normal form. 1/120 useless extension candidates. Maximal degree in co-relation 166. Up to 19 conditions per place. [2021-12-21 15:17:32,646 INFO L132 encePairwiseOnDemand]: 73/80 looper letters, 19 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-12-21 15:17:32,646 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 227 flow [2021-12-21 15:17:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:17:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:17:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 407 transitions. [2021-12-21 15:17:32,652 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8479166666666667 [2021-12-21 15:17:32,652 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 407 transitions. [2021-12-21 15:17:32,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 407 transitions. [2021-12-21 15:17:32,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:32,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 407 transitions. [2021-12-21 15:17:32,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.83333333333333) internal successors, (407), 6 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,658 INFO L186 Difference]: Start difference. First operand has 68 places, 65 transitions, 134 flow. Second operand 6 states and 407 transitions. [2021-12-21 15:17:32,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 227 flow [2021-12-21 15:17:32,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:17:32,661 INFO L242 Difference]: Finished difference. Result has 75 places, 68 transitions, 163 flow [2021-12-21 15:17:32,661 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2021-12-21 15:17:32,662 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2021-12-21 15:17:32,662 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 163 flow [2021-12-21 15:17:32,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:32,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:32,663 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] [2021-12-21 15:17:32,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:17:32,663 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1738455513, now seen corresponding path program 1 times [2021-12-21 15:17:32,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:32,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576326413] [2021-12-21 15:17:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:32,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576326413] [2021-12-21 15:17:32,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576326413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:32,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332712623] [2021-12-21 15:17:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:32,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:32,991 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) [2021-12-21 15:17:33,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:17:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:33,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 15:17:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:33,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:33,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332712623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:33,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:33,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2021-12-21 15:17:33,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654421841] [2021-12-21 15:17:33,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 15:17:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 15:17:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 15:17:33,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-21 15:17:33,897 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 163 flow. Second operand has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:33,897 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:33,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-21 15:17:33,898 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:34,330 INFO L129 PetriNetUnfolder]: 174/573 cut-off events. [2021-12-21 15:17:34,330 INFO L130 PetriNetUnfolder]: For 74/83 co-relation queries the response was YES. [2021-12-21 15:17:34,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 573 events. 174/573 cut-off events. For 74/83 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3194 event pairs, 15 based on Foata normal form. 4/499 useless extension candidates. Maximal degree in co-relation 1080. Up to 82 conditions per place. [2021-12-21 15:17:34,338 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 93 selfloop transitions, 31 changer transitions 19/184 dead transitions. [2021-12-21 15:17:34,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 184 transitions, 763 flow [2021-12-21 15:17:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:17:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:17:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1217 transitions. [2021-12-21 15:17:34,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7244047619047619 [2021-12-21 15:17:34,343 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1217 transitions. [2021-12-21 15:17:34,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1217 transitions. [2021-12-21 15:17:34,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:34,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1217 transitions. [2021-12-21 15:17:34,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.95238095238095) internal successors, (1217), 21 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) [2021-12-21 15:17:34,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,350 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 80.0) internal successors, (1760), 22 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,354 INFO L186 Difference]: Start difference. First operand has 75 places, 68 transitions, 163 flow. Second operand 21 states and 1217 transitions. [2021-12-21 15:17:34,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 184 transitions, 763 flow [2021-12-21 15:17:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 184 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-12-21 15:17:34,359 INFO L242 Difference]: Finished difference. Result has 107 places, 92 transitions, 391 flow [2021-12-21 15:17:34,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=391, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2021-12-21 15:17:34,361 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-12-21 15:17:34,361 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 391 flow [2021-12-21 15:17:34,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 53.76470588235294) internal successors, (914), 17 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:34,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:34,362 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] [2021-12-21 15:17:34,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:34,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:34,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:34,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1154719639, now seen corresponding path program 1 times [2021-12-21 15:17:34,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:34,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347995589] [2021-12-21 15:17:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:34,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:34,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347995589] [2021-12-21 15:17:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347995589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806860543] [2021-12-21 15:17:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:34,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:34,713 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) [2021-12-21 15:17:34,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:17:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 15:17:34,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:34,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:35,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806860543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:35,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:35,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 13 [2021-12-21 15:17:35,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389904380] [2021-12-21 15:17:35,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:35,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:17:35,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:17:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:17:35,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-21 15:17:35,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 391 flow. Second operand has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:35,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-21 15:17:35,624 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:35,965 INFO L129 PetriNetUnfolder]: 74/389 cut-off events. [2021-12-21 15:17:35,965 INFO L130 PetriNetUnfolder]: For 403/428 co-relation queries the response was YES. [2021-12-21 15:17:35,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 389 events. 74/389 cut-off events. For 403/428 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2086 event pairs, 5 based on Foata normal form. 17/382 useless extension candidates. Maximal degree in co-relation 914. Up to 142 conditions per place. [2021-12-21 15:17:35,968 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 39 selfloop transitions, 10 changer transitions 11/114 dead transitions. [2021-12-21 15:17:35,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 609 flow [2021-12-21 15:17:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:17:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:17:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 608 transitions. [2021-12-21 15:17:35,970 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-12-21 15:17:35,970 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 608 transitions. [2021-12-21 15:17:35,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 608 transitions. [2021-12-21 15:17:35,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:35,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 608 transitions. [2021-12-21 15:17:35,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.8) internal successors, (608), 10 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,973 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,973 INFO L186 Difference]: Start difference. First operand has 107 places, 92 transitions, 391 flow. Second operand 10 states and 608 transitions. [2021-12-21 15:17:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 609 flow [2021-12-21 15:17:35,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 114 transitions, 533 flow, removed 29 selfloop flow, removed 10 redundant places. [2021-12-21 15:17:35,978 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 368 flow [2021-12-21 15:17:35,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2021-12-21 15:17:35,979 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 33 predicate places. [2021-12-21 15:17:35,979 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 368 flow [2021-12-21 15:17:35,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.07692307692308) internal successors, (755), 13 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:35,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:35,979 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] [2021-12-21 15:17:36,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 15:17:36,198 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 [2021-12-21 15:17:36,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash -837475069, now seen corresponding path program 2 times [2021-12-21 15:17:36,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:36,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742822282] [2021-12-21 15:17:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:36,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:36,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742822282] [2021-12-21 15:17:36,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742822282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:36,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440780177] [2021-12-21 15:17:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:17:36,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:36,359 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) [2021-12-21 15:17:36,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:17:36,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:17:36,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 15:17:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:36,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:36,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440780177] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:36,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 16 [2021-12-21 15:17:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68884577] [2021-12-21 15:17:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:17:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:17:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-12-21 15:17:36,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-21 15:17:36,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:36,826 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:36,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-21 15:17:36,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:37,071 INFO L129 PetriNetUnfolder]: 171/584 cut-off events. [2021-12-21 15:17:37,071 INFO L130 PetriNetUnfolder]: For 527/527 co-relation queries the response was YES. [2021-12-21 15:17:37,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 584 events. 171/584 cut-off events. For 527/527 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3358 event pairs, 62 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1454. Up to 222 conditions per place. [2021-12-21 15:17:37,075 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 68 selfloop transitions, 24 changer transitions 6/139 dead transitions. [2021-12-21 15:17:37,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 139 transitions, 769 flow [2021-12-21 15:17:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 15:17:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-21 15:17:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 589 transitions. [2021-12-21 15:17:37,077 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.73625 [2021-12-21 15:17:37,077 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 589 transitions. [2021-12-21 15:17:37,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 589 transitions. [2021-12-21 15:17:37,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:37,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 589 transitions. [2021-12-21 15:17:37,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.9) internal successors, (589), 10 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,080 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 80.0) internal successors, (880), 11 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,080 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 368 flow. Second operand 10 states and 589 transitions. [2021-12-21 15:17:37,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 139 transitions, 769 flow [2021-12-21 15:17:37,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 139 transitions, 721 flow, removed 15 selfloop flow, removed 7 redundant places. [2021-12-21 15:17:37,084 INFO L242 Difference]: Finished difference. Result has 107 places, 100 transitions, 495 flow [2021-12-21 15:17:37,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=495, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2021-12-21 15:17:37,085 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 36 predicate places. [2021-12-21 15:17:37,085 INFO L470 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 495 flow [2021-12-21 15:17:37,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,086 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:37,086 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] [2021-12-21 15:17:37,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:37,303 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 [2021-12-21 15:17:37,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash 852200369, now seen corresponding path program 3 times [2021-12-21 15:17:37,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953032103] [2021-12-21 15:17:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:37,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:37,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953032103] [2021-12-21 15:17:37,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953032103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517088398] [2021-12-21 15:17:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:17:37,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:37,430 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) [2021-12-21 15:17:37,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:17:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:17:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 15:17:37,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:37,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:37,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517088398] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:37,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 15:17:37,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 10] total 15 [2021-12-21 15:17:37,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867354570] [2021-12-21 15:17:37,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:17:37,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 15:17:37,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:37,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 15:17:37,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:17:37,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-21 15:17:37,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:37,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:37,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-21 15:17:37,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:38,272 INFO L129 PetriNetUnfolder]: 171/587 cut-off events. [2021-12-21 15:17:38,274 INFO L130 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2021-12-21 15:17:38,276 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 587 events. 171/587 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3422 event pairs, 70 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 1624. Up to 290 conditions per place. [2021-12-21 15:17:38,278 INFO L132 encePairwiseOnDemand]: 69/80 looper letters, 63 selfloop transitions, 11 changer transitions 14/129 dead transitions. [2021-12-21 15:17:38,278 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 129 transitions, 800 flow [2021-12-21 15:17:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:17:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:17:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-12-21 15:17:38,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2021-12-21 15:17:38,280 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-12-21 15:17:38,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-12-21 15:17:38,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:38,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-12-21 15:17:38,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,282 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,282 INFO L186 Difference]: Start difference. First operand has 107 places, 100 transitions, 495 flow. Second operand 9 states and 520 transitions. [2021-12-21 15:17:38,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 129 transitions, 800 flow [2021-12-21 15:17:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 762 flow, removed 11 selfloop flow, removed 5 redundant places. [2021-12-21 15:17:38,288 INFO L242 Difference]: Finished difference. Result has 112 places, 100 transitions, 498 flow [2021-12-21 15:17:38,288 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=498, PETRI_PLACES=112, PETRI_TRANSITIONS=100} [2021-12-21 15:17:38,289 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 41 predicate places. [2021-12-21 15:17:38,289 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 100 transitions, 498 flow [2021-12-21 15:17:38,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 53.22222222222222) internal successors, (479), 9 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:38,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:38,289 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] [2021-12-21 15:17:38,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:38,503 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 [2021-12-21 15:17:38,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1402773219, now seen corresponding path program 2 times [2021-12-21 15:17:38,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776853742] [2021-12-21 15:17:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:38,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:38,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776853742] [2021-12-21 15:17:38,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776853742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266508250] [2021-12-21 15:17:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:17:38,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:38,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:38,604 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) [2021-12-21 15:17:38,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:17:38,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:17:38,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:38,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 15:17:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:39,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266508250] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:39,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:39,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2021-12-21 15:17:39,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240746628] [2021-12-21 15:17:39,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:39,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 15:17:39,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 15:17:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-21 15:17:39,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-21 15:17:39,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 100 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:39,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-21 15:17:39,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:39,501 INFO L129 PetriNetUnfolder]: 86/442 cut-off events. [2021-12-21 15:17:39,502 INFO L130 PetriNetUnfolder]: For 721/755 co-relation queries the response was YES. [2021-12-21 15:17:39,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 442 events. 86/442 cut-off events. For 721/755 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2395 event pairs, 11 based on Foata normal form. 21/453 useless extension candidates. Maximal degree in co-relation 1108. Up to 138 conditions per place. [2021-12-21 15:17:39,511 INFO L132 encePairwiseOnDemand]: 70/80 looper letters, 45 selfloop transitions, 41 changer transitions 12/154 dead transitions. [2021-12-21 15:17:39,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 981 flow [2021-12-21 15:17:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:17:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:17:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1026 transitions. [2021-12-21 15:17:39,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7544117647058823 [2021-12-21 15:17:39,514 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1026 transitions. [2021-12-21 15:17:39,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1026 transitions. [2021-12-21 15:17:39,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:39,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1026 transitions. [2021-12-21 15:17:39,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.35294117647059) internal successors, (1026), 17 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,518 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,518 INFO L186 Difference]: Start difference. First operand has 112 places, 100 transitions, 498 flow. Second operand 17 states and 1026 transitions. [2021-12-21 15:17:39,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 981 flow [2021-12-21 15:17:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 921 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-12-21 15:17:39,522 INFO L242 Difference]: Finished difference. Result has 131 places, 121 transitions, 805 flow [2021-12-21 15:17:39,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=805, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2021-12-21 15:17:39,523 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 60 predicate places. [2021-12-21 15:17:39,523 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 805 flow [2021-12-21 15:17:39,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:39,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:39,524 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] [2021-12-21 15:17:39,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:39,727 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 [2021-12-21 15:17:39,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -725373525, now seen corresponding path program 3 times [2021-12-21 15:17:39,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311226227] [2021-12-21 15:17:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:39,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:39,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311226227] [2021-12-21 15:17:39,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311226227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211694083] [2021-12-21 15:17:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:17:39,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:39,910 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) [2021-12-21 15:17:39,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:17:39,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:17:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:17:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 15:17:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:17:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:40,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:17:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:40,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211694083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:17:40,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:17:40,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2021-12-21 15:17:40,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855363312] [2021-12-21 15:17:40,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:17:40,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 15:17:40,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:17:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 15:17:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-12-21 15:17:40,392 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 80 [2021-12-21 15:17:40,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 805 flow. Second operand has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:17:40,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 80 [2021-12-21 15:17:40,393 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:17:40,600 INFO L129 PetriNetUnfolder]: 101/536 cut-off events. [2021-12-21 15:17:40,600 INFO L130 PetriNetUnfolder]: For 1320/1372 co-relation queries the response was YES. [2021-12-21 15:17:40,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 536 events. 101/536 cut-off events. For 1320/1372 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3179 event pairs, 14 based on Foata normal form. 25/552 useless extension candidates. Maximal degree in co-relation 1564. Up to 139 conditions per place. [2021-12-21 15:17:40,604 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 40 selfloop transitions, 61 changer transitions 9/166 dead transitions. [2021-12-21 15:17:40,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 166 transitions, 1359 flow [2021-12-21 15:17:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:17:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:17:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1077 transitions. [2021-12-21 15:17:40,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7479166666666667 [2021-12-21 15:17:40,607 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1077 transitions. [2021-12-21 15:17:40,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1077 transitions. [2021-12-21 15:17:40,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:17:40,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1077 transitions. [2021-12-21 15:17:40,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.833333333333336) internal successors, (1077), 18 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,613 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,613 INFO L186 Difference]: Start difference. First operand has 131 places, 121 transitions, 805 flow. Second operand 18 states and 1077 transitions. [2021-12-21 15:17:40,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 166 transitions, 1359 flow [2021-12-21 15:17:40,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1312 flow, removed 20 selfloop flow, removed 8 redundant places. [2021-12-21 15:17:40,620 INFO L242 Difference]: Finished difference. Result has 143 places, 143 transitions, 1157 flow [2021-12-21 15:17:40,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1157, PETRI_PLACES=143, PETRI_TRANSITIONS=143} [2021-12-21 15:17:40,622 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 72 predicate places. [2021-12-21 15:17:40,622 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 143 transitions, 1157 flow [2021-12-21 15:17:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:17:40,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:17:40,623 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] [2021-12-21 15:17:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:17:40,835 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 [2021-12-21 15:17:40,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:17:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:17:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash -378455913, now seen corresponding path program 1 times [2021-12-21 15:17:40,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:17:40,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733711947] [2021-12-21 15:17:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:40,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:17:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:17:41,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:17:41,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733711947] [2021-12-21 15:17:41,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733711947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:17:41,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054047322] [2021-12-21 15:17:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:17:41,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:17:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:17:41,484 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) [2021-12-21 15:17:41,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:17:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:17:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 15:17:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates...