./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:36:53,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:36:53,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:36:53,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:36:53,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:36:53,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:36:53,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:36:53,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:36:53,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:36:53,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:36:53,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:36:53,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:36:53,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:36:53,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:36:53,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:36:53,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:36:53,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:36:53,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:36:53,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:36:53,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:36:53,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:36:53,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:36:53,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:36:53,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:36:53,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:36:53,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:36:53,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:36:53,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:36:53,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:36:53,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:36:53,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:36:53,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:36:53,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:36:53,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:36:53,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:36:53,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:36:53,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:36:53,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:36:53,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:36:53,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:36:53,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:36:53,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:36:53,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:36:53,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:36:53,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:36:53,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:36:53,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:36:53,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:36:53,723 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:36:53,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:36:53,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:36:53,724 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:36:53,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:36:53,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:36:53,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:36:53,726 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:36:53,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:36:53,726 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:36:53,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:36:53,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:36:53,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:36:53,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:36:53,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:36:53,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:36:53,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:36:53,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:36:53,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:36:53,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:36:53,729 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:36:53,729 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:36:53,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:36:53,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-07-19 21:36:53,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:36:53,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:36:53,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:36:53,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:36:53,978 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:36:53,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-19 21:36:54,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9952f188/3a87eb2234964629bdee013cb5ffb727/FLAGc9099cfb2 [2022-07-19 21:36:54,460 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:36:54,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-07-19 21:36:54,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9952f188/3a87eb2234964629bdee013cb5ffb727/FLAGc9099cfb2 [2022-07-19 21:36:54,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9952f188/3a87eb2234964629bdee013cb5ffb727 [2022-07-19 21:36:54,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:36:54,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:36:54,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:36:54,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:36:54,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:36:54,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46696c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54, skipping insertion in model container [2022-07-19 21:36:54,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:36:54,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:36:54,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-07-19 21:36:54,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:36:54,704 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:36:54,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-07-19 21:36:54,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:36:54,736 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:36:54,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54 WrapperNode [2022-07-19 21:36:54,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:36:54,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:36:54,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:36:54,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:36:54,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,768 INFO L137 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-07-19 21:36:54,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:36:54,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:36:54,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:36:54,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:36:54,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:36:54,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:36:54,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:36:54,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:36:54,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (1/1) ... [2022-07-19 21:36:54,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:36:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:54,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:36:54,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:36:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:36:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:36:54,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:36:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:36:54,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:36:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-19 21:36:54,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-19 21:36:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:36:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:36:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:36:54,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:36:54,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:36:54,865 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:36:54,943 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:36:54,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:36:55,220 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:36:55,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:36:55,269 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-19 21:36:55,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:36:55 BoogieIcfgContainer [2022-07-19 21:36:55,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:36:55,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:36:55,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:36:55,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:36:55,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:36:54" (1/3) ... [2022-07-19 21:36:55,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466a5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:36:55, skipping insertion in model container [2022-07-19 21:36:55,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:36:54" (2/3) ... [2022-07-19 21:36:55,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466a5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:36:55, skipping insertion in model container [2022-07-19 21:36:55,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:36:55" (3/3) ... [2022-07-19 21:36:55,282 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-07-19 21:36:55,292 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:36:55,300 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:36:55,300 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:36:55,301 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:36:55,385 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:36:55,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 159 transitions, 342 flow [2022-07-19 21:36:55,497 INFO L129 PetriNetUnfolder]: 13/156 cut-off events. [2022-07-19 21:36:55,497 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:36:55,501 INFO L84 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 13/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-07-19 21:36:55,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 159 transitions, 342 flow [2022-07-19 21:36:55,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 145 transitions, 308 flow [2022-07-19 21:36:55,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:36:55,524 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45589ef3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4637d3f0 [2022-07-19 21:36:55,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-19 21:36:55,551 INFO L129 PetriNetUnfolder]: 13/144 cut-off events. [2022-07-19 21:36:55,552 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-19 21:36:55,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:55,553 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:55,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash 379312160, now seen corresponding path program 1 times [2022-07-19 21:36:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:55,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851707752] [2022-07-19 21:36:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:55,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851707752] [2022-07-19 21:36:55,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851707752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:36:55,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:36:55,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:36:55,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791598594] [2022-07-19 21:36:55,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:36:55,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:36:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:36:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:36:55,825 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 159 [2022-07-19 21:36:55,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 145 transitions, 308 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:55,840 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:55,840 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 159 [2022-07-19 21:36:55,842 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:55,964 INFO L129 PetriNetUnfolder]: 42/270 cut-off events. [2022-07-19 21:36:55,964 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-19 21:36:55,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 270 events. 42/270 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 708 event pairs, 15 based on Foata normal form. 42/281 useless extension candidates. Maximal degree in co-relation 216. Up to 59 conditions per place. [2022-07-19 21:36:55,973 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 9 selfloop transitions, 0 changer transitions 4/137 dead transitions. [2022-07-19 21:36:55,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 310 flow [2022-07-19 21:36:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:36:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:36:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 299 transitions. [2022-07-19 21:36:55,992 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.940251572327044 [2022-07-19 21:36:55,993 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 299 transitions. [2022-07-19 21:36:55,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 299 transitions. [2022-07-19 21:36:55,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:55,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 299 transitions. [2022-07-19 21:36:56,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 149.5) internal successors, (299), 2 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,011 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,013 INFO L186 Difference]: Start difference. First operand has 142 places, 145 transitions, 308 flow. Second operand 2 states and 299 transitions. [2022-07-19 21:36:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 310 flow [2022-07-19 21:36:56,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:36:56,021 INFO L242 Difference]: Finished difference. Result has 137 places, 133 transitions, 272 flow [2022-07-19 21:36:56,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=272, PETRI_PLACES=137, PETRI_TRANSITIONS=133} [2022-07-19 21:36:56,029 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-07-19 21:36:56,029 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 133 transitions, 272 flow [2022-07-19 21:36:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,031 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:56,031 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:36:56,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash 191455911, now seen corresponding path program 1 times [2022-07-19 21:36:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957880572] [2022-07-19 21:36:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:56,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957880572] [2022-07-19 21:36:56,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957880572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:36:56,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:36:56,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:36:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722789605] [2022-07-19 21:36:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:36:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:36:56,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:36:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:36:56,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 159 [2022-07-19 21:36:56,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 133 transitions, 272 flow. Second operand has 8 states, 8 states have (on average 104.5) internal successors, (836), 8 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:56,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 159 [2022-07-19 21:36:56,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:56,629 INFO L129 PetriNetUnfolder]: 296/684 cut-off events. [2022-07-19 21:36:56,630 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:36:56,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 684 events. 296/684 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2962 event pairs, 167 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 1140. Up to 421 conditions per place. [2022-07-19 21:36:56,638 INFO L132 encePairwiseOnDemand]: 149/159 looper letters, 44 selfloop transitions, 6 changer transitions 4/141 dead transitions. [2022-07-19 21:36:56,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 396 flow [2022-07-19 21:36:56,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:36:56,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:36:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-07-19 21:36:56,643 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6721698113207547 [2022-07-19 21:36:56,644 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-07-19 21:36:56,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-07-19 21:36:56,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:56,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-07-19 21:36:56,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,652 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,652 INFO L186 Difference]: Start difference. First operand has 137 places, 133 transitions, 272 flow. Second operand 8 states and 855 transitions. [2022-07-19 21:36:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 396 flow [2022-07-19 21:36:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 141 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:36:56,659 INFO L242 Difference]: Finished difference. Result has 144 places, 134 transitions, 300 flow [2022-07-19 21:36:56,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=144, PETRI_TRANSITIONS=134} [2022-07-19 21:36:56,660 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-19 21:36:56,661 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 134 transitions, 300 flow [2022-07-19 21:36:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.5) internal successors, (836), 8 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:56,662 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:56,662 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:56,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:36:56,663 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash -553736524, now seen corresponding path program 1 times [2022-07-19 21:36:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421416815] [2022-07-19 21:36:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:56,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421416815] [2022-07-19 21:36:56,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421416815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208073004] [2022-07-19 21:36:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:56,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:56,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:56,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:56,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:36:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 21:36:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:57,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:36:57,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208073004] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:57,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:36:57,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-19 21:36:57,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067213396] [2022-07-19 21:36:57,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:36:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:36:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:36:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:36:57,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 159 [2022-07-19 21:36:57,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 134 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:57,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:57,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 159 [2022-07-19 21:36:57,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:57,473 INFO L129 PetriNetUnfolder]: 183/623 cut-off events. [2022-07-19 21:36:57,473 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-07-19 21:36:57,475 INFO L84 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 623 events. 183/623 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3079 event pairs, 80 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 941. Up to 141 conditions per place. [2022-07-19 21:36:57,478 INFO L132 encePairwiseOnDemand]: 151/159 looper letters, 33 selfloop transitions, 7 changer transitions 0/142 dead transitions. [2022-07-19 21:36:57,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 398 flow [2022-07-19 21:36:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:36:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:36:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 873 transitions. [2022-07-19 21:36:57,481 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.784366576819407 [2022-07-19 21:36:57,482 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 873 transitions. [2022-07-19 21:36:57,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 873 transitions. [2022-07-19 21:36:57,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:57,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 873 transitions. [2022-07-19 21:36:57,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 124.71428571428571) internal successors, (873), 7 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:57,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:57,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 159.0) internal successors, (1272), 8 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:57,487 INFO L186 Difference]: Start difference. First operand has 144 places, 134 transitions, 300 flow. Second operand 7 states and 873 transitions. [2022-07-19 21:36:57,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 398 flow [2022-07-19 21:36:57,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 142 transitions, 380 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-07-19 21:36:57,493 INFO L242 Difference]: Finished difference. Result has 144 places, 136 transitions, 315 flow [2022-07-19 21:36:57,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=144, PETRI_TRANSITIONS=136} [2022-07-19 21:36:57,496 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 2 predicate places. [2022-07-19 21:36:57,496 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 136 transitions, 315 flow [2022-07-19 21:36:57,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:57,497 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:57,497 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:57,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:57,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:57,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1840372881, now seen corresponding path program 1 times [2022-07-19 21:36:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:57,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034618617] [2022-07-19 21:36:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:57,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:36:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:57,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034618617] [2022-07-19 21:36:57,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034618617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:57,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623652146] [2022-07-19 21:36:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:57,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:57,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:36:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 21:36:57,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:36:58,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:36:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:36:58,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623652146] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:58,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:36:58,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-19 21:36:58,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31883594] [2022-07-19 21:36:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:36:58,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:36:58,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:58,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:36:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:36:58,371 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 159 [2022-07-19 21:36:58,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 136 transitions, 315 flow. Second operand has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:58,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:58,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 159 [2022-07-19 21:36:58,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:58,737 INFO L129 PetriNetUnfolder]: 850/1566 cut-off events. [2022-07-19 21:36:58,737 INFO L130 PetriNetUnfolder]: For 646/901 co-relation queries the response was YES. [2022-07-19 21:36:58,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3303 conditions, 1566 events. 850/1566 cut-off events. For 646/901 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8601 event pairs, 213 based on Foata normal form. 255/1656 useless extension candidates. Maximal degree in co-relation 3295. Up to 429 conditions per place. [2022-07-19 21:36:58,751 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 84 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2022-07-19 21:36:58,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 688 flow [2022-07-19 21:36:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 21:36:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-19 21:36:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1327 transitions. [2022-07-19 21:36:58,755 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7587192681532304 [2022-07-19 21:36:58,755 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1327 transitions. [2022-07-19 21:36:58,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1327 transitions. [2022-07-19 21:36:58,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:58,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1327 transitions. [2022-07-19 21:36:58,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 120.63636363636364) internal successors, (1327), 11 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:58,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:58,765 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 159.0) internal successors, (1908), 12 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:58,765 INFO L186 Difference]: Start difference. First operand has 144 places, 136 transitions, 315 flow. Second operand 11 states and 1327 transitions. [2022-07-19 21:36:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 688 flow [2022-07-19 21:36:58,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 675 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:36:58,770 INFO L242 Difference]: Finished difference. Result has 154 places, 147 transitions, 395 flow [2022-07-19 21:36:58,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=395, PETRI_PLACES=154, PETRI_TRANSITIONS=147} [2022-07-19 21:36:58,772 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 12 predicate places. [2022-07-19 21:36:58,772 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 147 transitions, 395 flow [2022-07-19 21:36:58,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:58,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:58,773 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:58,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:36:58,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 21:36:58,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1817451035, now seen corresponding path program 2 times [2022-07-19 21:36:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:58,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82533354] [2022-07-19 21:36:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:36:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:36:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:36:59,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:36:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82533354] [2022-07-19 21:36:59,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82533354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:36:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519135962] [2022-07-19 21:36:59,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:36:59,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:36:59,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:36:59,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:36:59,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 21:36:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:36:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 21:36:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:36:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:36:59,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:36:59,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519135962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:36:59,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:36:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-07-19 21:36:59,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689477772] [2022-07-19 21:36:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:36:59,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:36:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:36:59,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:36:59,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:36:59,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 159 [2022-07-19 21:36:59,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 147 transitions, 395 flow. Second operand has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:59,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:36:59,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 159 [2022-07-19 21:36:59,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:36:59,701 INFO L129 PetriNetUnfolder]: 608/1360 cut-off events. [2022-07-19 21:36:59,702 INFO L130 PetriNetUnfolder]: For 932/1135 co-relation queries the response was YES. [2022-07-19 21:36:59,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 1360 events. 608/1360 cut-off events. For 932/1135 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7591 event pairs, 200 based on Foata normal form. 240/1566 useless extension candidates. Maximal degree in co-relation 3065. Up to 535 conditions per place. [2022-07-19 21:36:59,712 INFO L132 encePairwiseOnDemand]: 150/159 looper letters, 48 selfloop transitions, 13 changer transitions 0/160 dead transitions. [2022-07-19 21:36:59,712 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 160 transitions, 570 flow [2022-07-19 21:36:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:36:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:36:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 905 transitions. [2022-07-19 21:36:59,715 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7114779874213837 [2022-07-19 21:36:59,715 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 905 transitions. [2022-07-19 21:36:59,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 905 transitions. [2022-07-19 21:36:59,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:36:59,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 905 transitions. [2022-07-19 21:36:59,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.125) internal successors, (905), 8 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:59,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:59,721 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 159.0) internal successors, (1431), 9 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:59,721 INFO L186 Difference]: Start difference. First operand has 154 places, 147 transitions, 395 flow. Second operand 8 states and 905 transitions. [2022-07-19 21:36:59,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 160 transitions, 570 flow [2022-07-19 21:36:59,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 160 transitions, 563 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:36:59,726 INFO L242 Difference]: Finished difference. Result has 159 places, 150 transitions, 456 flow [2022-07-19 21:36:59,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=456, PETRI_PLACES=159, PETRI_TRANSITIONS=150} [2022-07-19 21:36:59,727 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 17 predicate places. [2022-07-19 21:36:59,727 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 150 transitions, 456 flow [2022-07-19 21:36:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:36:59,728 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:36:59,728 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:36:59,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:36:59,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:36:59,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:36:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:36:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878222, now seen corresponding path program 1 times [2022-07-19 21:36:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:36:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166190946] [2022-07-19 21:36:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:36:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:37:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:37:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:00,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:37:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166190946] [2022-07-19 21:37:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166190946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:37:00,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51666217] [2022-07-19 21:37:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:37:00,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:37:00,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:37:00,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:37:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:37:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 21:37:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:37:01,996 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:37:01,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-19 21:37:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:02,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:37:02,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:37:02,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 51 [2022-07-19 21:37:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:03,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51666217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:37:03,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:37:03,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 58 [2022-07-19 21:37:03,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274716641] [2022-07-19 21:37:03,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:37:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-19 21:37:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:37:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-19 21:37:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 21:37:03,370 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2022-07-19 21:37:03,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 150 transitions, 456 flow. Second operand has 58 states, 58 states have (on average 71.39655172413794) internal successors, (4141), 58 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:03,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:37:03,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2022-07-19 21:37:03,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:37:09,246 INFO L129 PetriNetUnfolder]: 8356/13792 cut-off events. [2022-07-19 21:37:09,246 INFO L130 PetriNetUnfolder]: For 14091/14450 co-relation queries the response was YES. [2022-07-19 21:37:09,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 13792 events. 8356/13792 cut-off events. For 14091/14450 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 102262 event pairs, 982 based on Foata normal form. 275/13847 useless extension candidates. Maximal degree in co-relation 36657. Up to 3808 conditions per place. [2022-07-19 21:37:09,384 INFO L132 encePairwiseOnDemand]: 114/159 looper letters, 427 selfloop transitions, 136 changer transitions 21/642 dead transitions. [2022-07-19 21:37:09,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 642 transitions, 3741 flow [2022-07-19 21:37:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 21:37:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-07-19 21:37:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4837 transitions. [2022-07-19 21:37:09,397 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47533411949685533 [2022-07-19 21:37:09,398 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4837 transitions. [2022-07-19 21:37:09,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4837 transitions. [2022-07-19 21:37:09,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:37:09,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4837 transitions. [2022-07-19 21:37:09,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 75.578125) internal successors, (4837), 64 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:09,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:09,427 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 159.0) internal successors, (10335), 65 states have internal predecessors, (10335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:09,428 INFO L186 Difference]: Start difference. First operand has 159 places, 150 transitions, 456 flow. Second operand 64 states and 4837 transitions. [2022-07-19 21:37:09,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 642 transitions, 3741 flow [2022-07-19 21:37:09,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 642 transitions, 3608 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-19 21:37:09,567 INFO L242 Difference]: Finished difference. Result has 266 places, 270 transitions, 1618 flow [2022-07-19 21:37:09,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=1618, PETRI_PLACES=266, PETRI_TRANSITIONS=270} [2022-07-19 21:37:09,570 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 124 predicate places. [2022-07-19 21:37:09,570 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 270 transitions, 1618 flow [2022-07-19 21:37:09,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 71.39655172413794) internal successors, (4141), 58 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:09,573 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:37:09,573 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:37:09,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:37:09,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:09,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:37:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:37:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1409400304, now seen corresponding path program 2 times [2022-07-19 21:37:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:37:09,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814306085] [2022-07-19 21:37:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:37:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:37:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:37:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:10,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:37:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814306085] [2022-07-19 21:37:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814306085] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:37:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342184854] [2022-07-19 21:37:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:37:10,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:37:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:37:10,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:37:10,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:37:10,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:37:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:37:10,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 21:37:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:37:10,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:37:11,087 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:37:11,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 21:37:11,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 21:37:11,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:37:11,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:37:11,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:37:12,337 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:37:12,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 45 [2022-07-19 21:37:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:37:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:37:14,000 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (< 0 ~M~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3))))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2022-07-19 21:37:16,258 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (<= (+ ~M~0 1) c_thread1Thread1of1ForFork2_~i~0) (< 0 ~M~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3)))))))) is different from false [2022-07-19 21:37:16,859 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_193 (Array Int Int)) (~M~0 Int) (v_ArrVal_194 (Array Int Int))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_193) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_194) c_~A~0.base))) (or (<= (+ ~M~0 1) c_thread1Thread1of1ForFork2_~i~0) (let ((.cse0 (select .cse2 (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))))) (let ((.cse1 (< .cse0 c_~min1~0))) (and (or (= c_~min2~0 .cse0) (not .cse1)) (or (= c_~min2~0 c_~min1~0) .cse1)))) (< 0 ~M~0) (let ((.cse4 (select .cse2 (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse3 (< .cse4 c_~min3~0))) (and (or .cse3 (< c_~min3~0 c_~min2~0)) (or (< .cse4 c_~min2~0) (not .cse3)))))))) is different from false [2022-07-19 21:37:32,454 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:37:32,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 135 [2022-07-19 21:37:32,483 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-19 21:37:32,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6701 treesize of output 6417 [2022-07-19 21:37:32,555 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-19 21:37:32,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6413 treesize of output 6033 [2022-07-19 21:37:32,613 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-19 21:37:32,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6029 treesize of output 5841 [2022-07-19 21:37:32,678 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-07-19 21:37:32,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5837 treesize of output 5073 [2022-07-19 21:37:55,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-19 21:37:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 21:37:55,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342184854] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:37:55,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:37:55,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 26] total 71 [2022-07-19 21:37:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895994562] [2022-07-19 21:37:55,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:37:55,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-19 21:37:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:37:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-19 21:37:55,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=3547, Unknown=114, NotChecked=402, Total=4970 [2022-07-19 21:37:55,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 159 [2022-07-19 21:37:55,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 270 transitions, 1618 flow. Second operand has 71 states, 71 states have (on average 55.985915492957744) internal successors, (3975), 71 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:37:55,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:37:55,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 159 [2022-07-19 21:37:55,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:04,882 INFO L129 PetriNetUnfolder]: 16294/25887 cut-off events. [2022-07-19 21:38:04,883 INFO L130 PetriNetUnfolder]: For 136705/136775 co-relation queries the response was YES. [2022-07-19 21:38:05,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101541 conditions, 25887 events. 16294/25887 cut-off events. For 136705/136775 co-relation queries the response was YES. Maximal size of possible extension queue 1421. Compared 201292 event pairs, 2837 based on Foata normal form. 13/25734 useless extension candidates. Maximal degree in co-relation 101479. Up to 10317 conditions per place. [2022-07-19 21:38:05,321 INFO L132 encePairwiseOnDemand]: 115/159 looper letters, 434 selfloop transitions, 419 changer transitions 18/918 dead transitions. [2022-07-19 21:38:05,321 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 918 transitions, 8099 flow [2022-07-19 21:38:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 21:38:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-07-19 21:38:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3942 transitions. [2022-07-19 21:38:05,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.38142235123367196 [2022-07-19 21:38:05,332 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3942 transitions. [2022-07-19 21:38:05,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3942 transitions. [2022-07-19 21:38:05,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:05,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3942 transitions. [2022-07-19 21:38:05,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 60.646153846153844) internal successors, (3942), 65 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:05,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 159.0) internal successors, (10494), 66 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:05,372 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 159.0) internal successors, (10494), 66 states have internal predecessors, (10494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:05,373 INFO L186 Difference]: Start difference. First operand has 266 places, 270 transitions, 1618 flow. Second operand 65 states and 3942 transitions. [2022-07-19 21:38:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 918 transitions, 8099 flow [2022-07-19 21:38:06,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 918 transitions, 7899 flow, removed 52 selfloop flow, removed 27 redundant places. [2022-07-19 21:38:06,293 INFO L242 Difference]: Finished difference. Result has 323 places, 633 transitions, 6357 flow [2022-07-19 21:38:06,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=6357, PETRI_PLACES=323, PETRI_TRANSITIONS=633} [2022-07-19 21:38:06,294 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 181 predicate places. [2022-07-19 21:38:06,295 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 633 transitions, 6357 flow [2022-07-19 21:38:06,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 55.985915492957744) internal successors, (3975), 71 states have internal predecessors, (3975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:06,296 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:06,297 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:38:06,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:06,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:38:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1242628626, now seen corresponding path program 3 times [2022-07-19 21:38:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283464594] [2022-07-19 21:38:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:07,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283464594] [2022-07-19 21:38:07,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283464594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469124176] [2022-07-19 21:38:07,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:38:07,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:07,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:07,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:38:07,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:38:07,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:07,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 21:38:07,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:08,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-07-19 21:38:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:08,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-07-19 21:38:09,090 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:38:09,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 43 [2022-07-19 21:38:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:38:09,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:38:10,966 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:38:10,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 223 [2022-07-19 21:38:10,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 100 [2022-07-19 21:38:10,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2022-07-19 21:38:11,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-19 21:38:11,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-07-19 21:38:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:38:11,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469124176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:38:11,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:38:11,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 73 [2022-07-19 21:38:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337859981] [2022-07-19 21:38:11,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:38:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-19 21:38:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-19 21:38:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4300, Unknown=4, NotChecked=0, Total=5256 [2022-07-19 21:38:11,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 159 [2022-07-19 21:38:11,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 633 transitions, 6357 flow. Second operand has 73 states, 73 states have (on average 65.73972602739725) internal successors, (4799), 73 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:11,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:11,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 159 [2022-07-19 21:38:11,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:24,846 INFO L129 PetriNetUnfolder]: 18629/31921 cut-off events. [2022-07-19 21:38:24,847 INFO L130 PetriNetUnfolder]: For 345049/346393 co-relation queries the response was YES. [2022-07-19 21:38:25,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167295 conditions, 31921 events. 18629/31921 cut-off events. For 345049/346393 co-relation queries the response was YES. Maximal size of possible extension queue 1851. Compared 279809 event pairs, 1201 based on Foata normal form. 910/32311 useless extension candidates. Maximal degree in co-relation 167215. Up to 9402 conditions per place. [2022-07-19 21:38:25,438 INFO L132 encePairwiseOnDemand]: 116/159 looper letters, 645 selfloop transitions, 948 changer transitions 21/1710 dead transitions. [2022-07-19 21:38:25,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1710 transitions, 21416 flow [2022-07-19 21:38:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-07-19 21:38:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-07-19 21:38:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6461 transitions. [2022-07-19 21:38:25,455 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.436937850814905 [2022-07-19 21:38:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6461 transitions. [2022-07-19 21:38:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6461 transitions. [2022-07-19 21:38:25,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:25,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6461 transitions. [2022-07-19 21:38:25,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 69.47311827956989) internal successors, (6461), 93 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:25,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 159.0) internal successors, (14946), 94 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:25,492 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 159.0) internal successors, (14946), 94 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:25,493 INFO L186 Difference]: Start difference. First operand has 323 places, 633 transitions, 6357 flow. Second operand 93 states and 6461 transitions. [2022-07-19 21:38:25,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1710 transitions, 21416 flow [2022-07-19 21:38:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1710 transitions, 20079 flow, removed 635 selfloop flow, removed 25 redundant places. [2022-07-19 21:38:29,162 INFO L242 Difference]: Finished difference. Result has 431 places, 1289 transitions, 17520 flow [2022-07-19 21:38:29,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=5832, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=17520, PETRI_PLACES=431, PETRI_TRANSITIONS=1289} [2022-07-19 21:38:29,164 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 289 predicate places. [2022-07-19 21:38:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1289 transitions, 17520 flow [2022-07-19 21:38:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 65.73972602739725) internal successors, (4799), 73 states have internal predecessors, (4799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:29,166 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:38:29,166 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:38:29,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:38:29,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:29,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:38:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:38:29,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1938704318, now seen corresponding path program 4 times [2022-07-19 21:38:29,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:38:29,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202380659] [2022-07-19 21:38:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:38:29,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:38:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:38:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:38:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202380659] [2022-07-19 21:38:30,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202380659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:38:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263943086] [2022-07-19 21:38:30,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:38:30,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:38:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:38:30,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:38:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:38:30,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:38:30,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:38:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 21:38:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:38:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:38:31,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-07-19 21:38:31,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:38:31,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 43 [2022-07-19 21:38:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:38:32,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:38:32,772 WARN L833 $PredicateComparison]: unable to prove that (or (= c_~min2~0 c_~min1~0) (forall ((~M~0 Int) (v_ArrVal_261 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_261) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (let ((.cse0 (< .cse1 c_~min3~0))) (and (or (not .cse0) (< .cse1 c_~min2~0)) (or .cse0 (< c_~min3~0 c_~min2~0))))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2022-07-19 21:38:33,071 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:38:33,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 107 [2022-07-19 21:38:33,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-07-19 21:38:33,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-19 21:38:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-19 21:38:34,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263943086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:38:34,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:38:34,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 29, 30] total 81 [2022-07-19 21:38:34,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70414397] [2022-07-19 21:38:34,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:38:34,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-19 21:38:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:38:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-19 21:38:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=5205, Unknown=1, NotChecked=156, Total=6480 [2022-07-19 21:38:34,692 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 159 [2022-07-19 21:38:34,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1289 transitions, 17520 flow. Second operand has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:34,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:38:34,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 159 [2022-07-19 21:38:34,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:38:52,221 INFO L129 PetriNetUnfolder]: 21983/38033 cut-off events. [2022-07-19 21:38:52,222 INFO L130 PetriNetUnfolder]: For 565257/567175 co-relation queries the response was YES. [2022-07-19 21:38:52,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239083 conditions, 38033 events. 21983/38033 cut-off events. For 565257/567175 co-relation queries the response was YES. Maximal size of possible extension queue 2181. Compared 345263 event pairs, 2143 based on Foata normal form. 1013/38460 useless extension candidates. Maximal degree in co-relation 238963. Up to 11455 conditions per place. [2022-07-19 21:38:53,202 INFO L132 encePairwiseOnDemand]: 117/159 looper letters, 749 selfloop transitions, 1060 changer transitions 22/1926 dead transitions. [2022-07-19 21:38:53,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1926 transitions, 29141 flow [2022-07-19 21:38:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 21:38:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-19 21:38:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4356 transitions. [2022-07-19 21:38:53,207 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.41509433962264153 [2022-07-19 21:38:53,207 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4356 transitions. [2022-07-19 21:38:53,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4356 transitions. [2022-07-19 21:38:53,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:38:53,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4356 transitions. [2022-07-19 21:38:53,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 66.0) internal successors, (4356), 66 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:53,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 159.0) internal successors, (10653), 67 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:53,224 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 159.0) internal successors, (10653), 67 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:38:53,225 INFO L186 Difference]: Start difference. First operand has 431 places, 1289 transitions, 17520 flow. Second operand 66 states and 4356 transitions. [2022-07-19 21:38:53,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1926 transitions, 29141 flow [2022-07-19 21:39:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1926 transitions, 27098 flow, removed 964 selfloop flow, removed 37 redundant places. [2022-07-19 21:39:06,790 INFO L242 Difference]: Finished difference. Result has 473 places, 1572 transitions, 23910 flow [2022-07-19 21:39:06,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=16113, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=23910, PETRI_PLACES=473, PETRI_TRANSITIONS=1572} [2022-07-19 21:39:06,793 INFO L279 CegarLoopForPetriNet]: 142 programPoint places, 331 predicate places. [2022-07-19 21:39:06,793 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1572 transitions, 23910 flow [2022-07-19 21:39:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 61.51851851851852) internal successors, (4983), 81 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:39:06,794 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:39:06,794 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:39:06,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:39:07,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:07,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-19 21:39:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:39:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1210384500, now seen corresponding path program 1 times [2022-07-19 21:39:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:39:07,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510521739] [2022-07-19 21:39:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:07,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:39:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:39:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510521739] [2022-07-19 21:39:07,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510521739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:39:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854407044] [2022-07-19 21:39:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:39:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:39:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:39:07,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:39:07,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:39:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:39:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 21:39:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:39:08,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:39:08,074 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-19 21:39:08,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-19 21:39:08,393 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:39:08,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-19 21:39:09,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-19 21:39:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:39:09,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-07-19 21:39:09,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:39:09,827 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:39:09,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 32 [2022-07-19 21:39:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:10,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:39:10,267 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_297 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (not (< .cse0 c_~min2~0)) (not (< .cse0 c_~min3~0)) (= c_~min1~0 .cse0)))) (or (forall ((v_ArrVal_297 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) c_~min3~0)) (= c_~min1~0 c_~min3~0) (not (< c_~min3~0 c_~min2~0)))) is different from false [2022-07-19 21:39:10,329 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_296 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_296) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))))) (or (not (< .cse0 c_~min2~0)) (= c_~min1~0 .cse0) (not (< .cse0 c_~min3~0))))) (or (forall ((v_ArrVal_296 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_296) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_297) c_~A~0.base) (+ c_~A~0.offset (* 4 c_~M~0))) c_~min3~0)) (= c_~min1~0 c_~min3~0) (not (< c_~min3~0 c_~min2~0)))) is different from false [2022-07-19 21:39:10,407 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:39:10,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 573 treesize of output 509 [2022-07-19 21:39:10,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 306 [2022-07-19 21:39:10,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 370 treesize of output 298 [2022-07-19 21:39:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:39:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854407044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:39:13,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:39:13,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 85 [2022-07-19 21:39:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689692968] [2022-07-19 21:39:13,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:39:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-19 21:39:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:39:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-19 21:39:13,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=6007, Unknown=2, NotChecked=326, Total=7140 [2022-07-19 21:39:13,312 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 159 [2022-07-19 21:39:13,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1572 transitions, 23910 flow. Second operand has 85 states, 85 states have (on average 58.576470588235296) internal successors, (4979), 85 states have internal predecessors, (4979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:39:13,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:39:13,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 159 [2022-07-19 21:39:13,315 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:39:41,107 INFO L129 PetriNetUnfolder]: 37439/62464 cut-off events. [2022-07-19 21:39:41,108 INFO L130 PetriNetUnfolder]: For 861369/863188 co-relation queries the response was YES.