./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:56:48,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:56:48,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:56:48,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:56:48,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:56:48,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:56:48,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:56:48,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:56:48,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:56:48,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:56:48,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:56:48,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:56:48,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:56:48,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:56:48,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:56:48,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:56:48,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:56:48,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:56:48,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:56:48,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:56:48,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:56:48,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:56:48,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:56:48,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:56:48,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:56:48,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:56:48,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:56:48,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:56:48,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:56:48,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:56:48,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:56:48,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:56:48,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:56:48,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:56:48,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:56:48,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:56:48,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:56:48,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:56:48,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:56:48,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:56:48,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:56:48,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:56:48,718 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:56:48,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:56:48,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:56:48,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:56:48,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:56:48,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:56:48,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:56:48,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:56:48,722 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:56:48,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:56:48,723 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:56:48,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:56:48,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:56:48,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:56:48,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:56:48,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:56:48,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:56:48,724 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:56:48,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:56:48,724 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:56:48,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:56:48,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:56:48,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:56:48,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:56:48,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:56:48,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:56:48,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:56:48,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:56:48,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:56:48,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:56:48,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:56:48,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:56:48,727 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:56:48,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:56:48,727 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:56:48,728 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:56:49,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:56:49,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:56:49,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:56:49,069 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:56:49,070 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:56:49,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 14:56:50,186 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:56:50,440 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:56:50,441 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-09-01 14:56:50,448 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e7677f2/10fbeadce3e14ad4997b3c1b0cb251ff/FLAG1b6ef89ad [2023-09-01 14:56:50,470 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e7677f2/10fbeadce3e14ad4997b3c1b0cb251ff [2023-09-01 14:56:50,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:56:50,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:56:50,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:56:50,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:56:50,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:56:50,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532caefd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50, skipping insertion in model container [2023-09-01 14:56:50,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:56:50,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:56:50,659 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 14:56:50,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:56:50,677 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:56:50,699 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-09-01 14:56:50,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:56:50,715 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:56:50,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50 WrapperNode [2023-09-01 14:56:50,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:56:50,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:56:50,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:56:50,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:56:50,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,765 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-09-01 14:56:50,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:56:50,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:56:50,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:56:50,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:56:50,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,788 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:56:50,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:56:50,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:56:50,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:56:50,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (1/1) ... [2023-09-01 14:56:50,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:56:50,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:56:50,826 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) [2023-09-01 14:56:50,828 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 [2023-09-01 14:56:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:56:50,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:56:50,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:56:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:56:50,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:56:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:56:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:56:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:56:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:56:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:56:50,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:56:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:56:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:56:50,859 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:56:50,944 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:56:50,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:56:51,353 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:56:51,361 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:56:51,361 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:56:51,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:56:51 BoogieIcfgContainer [2023-09-01 14:56:51,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:56:51,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:56:51,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:56:51,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:56:51,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:56:50" (1/3) ... [2023-09-01 14:56:51,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:56:51, skipping insertion in model container [2023-09-01 14:56:51,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:56:50" (2/3) ... [2023-09-01 14:56:51,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3506f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:56:51, skipping insertion in model container [2023-09-01 14:56:51,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:56:51" (3/3) ... [2023-09-01 14:56:51,371 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-09-01 14:56:51,382 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:56:51,390 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:56:51,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:56:51,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:56:51,540 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:56:51,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-09-01 14:56:51,698 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-09-01 14:56:51,702 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:56:51,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 14:56:51,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-09-01 14:56:51,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-09-01 14:56:51,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:56:51,734 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-09-01 14:56:51,738 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-09-01 14:56:51,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-09-01 14:56:51,809 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-09-01 14:56:51,810 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:56:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-09-01 14:56:51,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-09-01 14:56:56,507 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-09-01 14:56:56,507 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-09-01 14:56:56,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:56:56,522 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6be58a9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:56:56,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:56:56,528 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:56:56,528 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:56:56,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:56,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:56,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:56,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-09-01 14:56:56,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:56,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695332975] [2023-09-01 14:56:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:56:56,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695332975] [2023-09-01 14:56:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695332975] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:56,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:56,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:56:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494625436] [2023-09-01 14:56:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:56,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:56:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:56:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:56:57,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 355 [2023-09-01 14:56:57,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:57,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 355 [2023-09-01 14:56:57,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:57,046 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-09-01 14:56:57,046 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 14:56:57,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-09-01 14:56:57,048 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-09-01 14:56:57,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-09-01 14:56:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:56:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:56:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-09-01 14:56:57,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356807511737089 [2023-09-01 14:56:57,074 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-09-01 14:56:57,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-09-01 14:56:57,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:57,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-09-01 14:56:57,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,091 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 464 transitions. [2023-09-01 14:56:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-09-01 14:56:57,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:56:57,095 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-09-01 14:56:57,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-09-01 14:56:57,100 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-09-01 14:56:57,101 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-09-01 14:56:57,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:57,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:57,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:56:57,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:57,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-09-01 14:56:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329980450] [2023-09-01 14:56:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:57,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:57,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329980450] [2023-09-01 14:56:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329980450] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:57,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 14:56:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012371833] [2023-09-01 14:56:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:57,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:56:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:56:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:56:57,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 355 [2023-09-01 14:56:57,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:57,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 355 [2023-09-01 14:56:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:57,374 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-09-01 14:56:57,374 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:56:57,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-09-01 14:56:57,376 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-09-01 14:56:57,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-09-01 14:56:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:56:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:56:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-09-01 14:56:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384976525821596 [2023-09-01 14:56:57,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-09-01 14:56:57,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-09-01 14:56:57,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:57,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-09-01 14:56:57,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,390 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 467 transitions. [2023-09-01 14:56:57,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-09-01 14:56:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:56:57,391 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-09-01 14:56:57,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-09-01 14:56:57,392 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-09-01 14:56:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-09-01 14:56:57,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:57,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:56:57,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-09-01 14:56:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963974888] [2023-09-01 14:56:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:57,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:57,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963974888] [2023-09-01 14:56:57,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963974888] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:57,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:57,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:56:57,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532625197] [2023-09-01 14:56:57,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:57,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:56:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:56:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:56:57,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-09-01 14:56:57,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:57,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-09-01 14:56:57,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:57,776 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-09-01 14:56:57,776 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-09-01 14:56:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-09-01 14:56:57,779 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-09-01 14:56:57,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-09-01 14:56:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:56:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:56:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-09-01 14:56:57,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230985915492958 [2023-09-01 14:56:57,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-09-01 14:56:57,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-09-01 14:56:57,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:57,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-09-01 14:56:57,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,789 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 751 transitions. [2023-09-01 14:56:57,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-09-01 14:56:57,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:56:57,791 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-09-01 14:56:57,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-09-01 14:56:57,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-09-01 14:56:57,795 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-09-01 14:56:57,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:57,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:57,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:56:57,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:57,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-09-01 14:56:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:57,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920804335] [2023-09-01 14:56:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920804335] [2023-09-01 14:56:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920804335] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:56:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7248065] [2023-09-01 14:56:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:56:57,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:56:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:56:57,953 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) [2023-09-01 14:56:57,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:56:58,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:56:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:56:58,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:56:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:56:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:58,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:56:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7248065] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:56:58,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:56:58,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-09-01 14:56:58,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882721602] [2023-09-01 14:56:58,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:58,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:56:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:56:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-09-01 14:56:58,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-09-01 14:56:58,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:58,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-09-01 14:56:58,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:58,378 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-09-01 14:56:58,379 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-09-01 14:56:58,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-09-01 14:56:58,380 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-09-01 14:56:58,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-09-01 14:56:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:56:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:56:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-09-01 14:56:58,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43380281690140843 [2023-09-01 14:56:58,387 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-09-01 14:56:58,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-09-01 14:56:58,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:58,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-09-01 14:56:58,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,393 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,393 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 616 transitions. [2023-09-01 14:56:58,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-09-01 14:56:58,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 14:56:58,396 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-09-01 14:56:58,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-09-01 14:56:58,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-09-01 14:56:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-09-01 14:56:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:58,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:56:58,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:56:58,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:58,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-09-01 14:56:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:58,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065900747] [2023-09-01 14:56:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:58,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:58,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065900747] [2023-09-01 14:56:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065900747] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:58,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:58,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:56:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933725487] [2023-09-01 14:56:58,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:58,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:56:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:56:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:56:58,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 14:56:58,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:58,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 14:56:58,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:58,877 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-09-01 14:56:58,878 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-09-01 14:56:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-09-01 14:56:58,879 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-09-01 14:56:58,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-09-01 14:56:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:56:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:56:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 891 transitions. [2023-09-01 14:56:58,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183098591549296 [2023-09-01 14:56:58,883 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 891 transitions. [2023-09-01 14:56:58,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 891 transitions. [2023-09-01 14:56:58,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:58,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 891 transitions. [2023-09-01 14:56:58,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,891 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,891 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 891 transitions. [2023-09-01 14:56:58,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-09-01 14:56:58,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:56:58,894 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-09-01 14:56:58,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-09-01 14:56:58,895 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-09-01 14:56:58,895 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-09-01 14:56:58,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:58,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:58,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:58,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:56:58,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:58,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-09-01 14:56:58,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:58,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775328432] [2023-09-01 14:56:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775328432] [2023-09-01 14:56:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775328432] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:58,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:56:58,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741713732] [2023-09-01 14:56:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:58,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:56:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:56:58,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:56:59,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-09-01 14:56:59,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:59,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-09-01 14:56:59,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:59,077 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-09-01 14:56:59,077 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-09-01 14:56:59,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-09-01 14:56:59,079 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-09-01 14:56:59,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-09-01 14:56:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:56:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:56:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2023-09-01 14:56:59,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43309859154929575 [2023-09-01 14:56:59,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2023-09-01 14:56:59,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2023-09-01 14:56:59,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:59,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2023-09-01 14:56:59,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,087 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 615 transitions. [2023-09-01 14:56:59,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-09-01 14:56:59,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:56:59,090 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-09-01 14:56:59,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-09-01 14:56:59,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-09-01 14:56:59,091 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-09-01 14:56:59,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:59,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:59,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:56:59,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:59,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-09-01 14:56:59,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:59,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594600516] [2023-09-01 14:56:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:59,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:59,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594600516] [2023-09-01 14:56:59,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594600516] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:59,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:59,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:56:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675458664] [2023-09-01 14:56:59,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:59,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:56:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:56:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:56:59,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-09-01 14:56:59,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:59,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-09-01 14:56:59,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:59,358 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-09-01 14:56:59,359 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-09-01 14:56:59,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-09-01 14:56:59,360 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-09-01 14:56:59,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-09-01 14:56:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:56:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:56:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 894 transitions. [2023-09-01 14:56:59,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-09-01 14:56:59,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 894 transitions. [2023-09-01 14:56:59,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 894 transitions. [2023-09-01 14:56:59,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:59,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 894 transitions. [2023-09-01 14:56:59,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,371 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,371 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 894 transitions. [2023-09-01 14:56:59,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-09-01 14:56:59,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-09-01 14:56:59,374 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-09-01 14:56:59,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-09-01 14:56:59,375 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-09-01 14:56:59,375 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-09-01 14:56:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:59,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:59,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:56:59,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:59,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-09-01 14:56:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:59,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516118334] [2023-09-01 14:56:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:59,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516118334] [2023-09-01 14:56:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516118334] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:56:59,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:56:59,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:56:59,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184549231] [2023-09-01 14:56:59,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:56:59,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:56:59,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:56:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:56:59,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-09-01 14:56:59,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:56:59,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-09-01 14:56:59,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:56:59,645 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-09-01 14:56:59,645 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-09-01 14:56:59,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-09-01 14:56:59,647 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-09-01 14:56:59,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-09-01 14:56:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:56:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:56:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-09-01 14:56:59,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-09-01 14:56:59,650 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-09-01 14:56:59,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-09-01 14:56:59,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:56:59,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-09-01 14:56:59,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,656 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,656 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 745 transitions. [2023-09-01 14:56:59,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-09-01 14:56:59,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-09-01 14:56:59,659 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-09-01 14:56:59,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-09-01 14:56:59,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-09-01 14:56:59,660 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-09-01 14:56:59,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:56:59,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:56:59,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:56:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 14:56:59,661 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:56:59,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:56:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-09-01 14:56:59,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:56:59,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831068790] [2023-09-01 14:56:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:56:59,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:56:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:56:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:56:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831068790] [2023-09-01 14:56:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831068790] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:56:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652023898] [2023-09-01 14:56:59,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:56:59,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:56:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:56:59,756 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) [2023-09-01 14:56:59,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:56:59,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:56:59,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:56:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:56:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:56:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:56:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:56:59,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652023898] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:56:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:56:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-09-01 14:56:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327807880] [2023-09-01 14:56:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:56:59,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:56:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:56:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:56:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:57:00,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 14:57:00,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:00,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 14:57:00,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:00,248 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-09-01 14:57:00,248 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-09-01 14:57:00,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-09-01 14:57:00,250 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-09-01 14:57:00,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-09-01 14:57:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:57:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:57:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2023-09-01 14:57:00,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164989939637827 [2023-09-01 14:57:00,254 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2023-09-01 14:57:00,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2023-09-01 14:57:00,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:00,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2023-09-01 14:57:00,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,261 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,261 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1035 transitions. [2023-09-01 14:57:00,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-09-01 14:57:00,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-09-01 14:57:00,265 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-09-01 14:57:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-09-01 14:57:00,266 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-09-01 14:57:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-09-01 14:57:00,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:00,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:00,477 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,SelfDestructingSolverStorable8 [2023-09-01 14:57:00,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:00,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-09-01 14:57:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042349716] [2023-09-01 14:57:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:00,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:00,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:00,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042349716] [2023-09-01 14:57:00,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042349716] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:00,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28158268] [2023-09-01 14:57:00,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:57:00,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:00,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:00,598 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) [2023-09-01 14:57:00,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:57:00,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-09-01 14:57:00,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:00,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:00,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28158268] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:00,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:00,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-09-01 14:57:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217500484] [2023-09-01 14:57:00,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:00,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 14:57:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 14:57:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:57:00,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 14:57:00,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:00,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:00,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 14:57:00,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:01,024 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-09-01 14:57:01,025 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-09-01 14:57:01,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-09-01 14:57:01,027 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-09-01 14:57:01,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-09-01 14:57:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:57:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:57:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-09-01 14:57:01,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746478873239434 [2023-09-01 14:57:01,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-09-01 14:57:01,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-09-01 14:57:01,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:01,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-09-01 14:57:01,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:01,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:01,035 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:01,035 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 741 transitions. [2023-09-01 14:57:01,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-09-01 14:57:01,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-09-01 14:57:01,039 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-09-01 14:57:01,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-09-01 14:57:01,040 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-09-01 14:57:01,040 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-09-01 14:57:01,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:01,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:01,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:01,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:01,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-09-01 14:57:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:01,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899797179] [2023-09-01 14:57:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 14:57:01,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:01,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899797179] [2023-09-01 14:57:01,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899797179] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:01,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312690068] [2023-09-01 14:57:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:01,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:01,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:01,669 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) [2023-09-01 14:57:01,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:57:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-09-01 14:57:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:01,970 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-09-01 14:57:01,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-09-01 14:57:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:01,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:02,139 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-09-01 14:57:02,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-09-01 14:57:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312690068] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:02,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:02,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-09-01 14:57:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322560753] [2023-09-01 14:57:02,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 14:57:02,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:02,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 14:57:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 14:57:03,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-09-01 14:57:03,088 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:03,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:03,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-09-01 14:57:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:04,303 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-09-01 14:57:04,303 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-09-01 14:57:04,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-09-01 14:57:04,307 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-09-01 14:57:04,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-09-01 14:57:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 14:57:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 14:57:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2886 transitions. [2023-09-01 14:57:04,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36952624839948783 [2023-09-01 14:57:04,315 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2886 transitions. [2023-09-01 14:57:04,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2886 transitions. [2023-09-01 14:57:04,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:04,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2886 transitions. [2023-09-01 14:57:04,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.1818181818182) internal successors, (2886), 22 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:04,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:04,336 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:04,336 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2886 transitions. [2023-09-01 14:57:04,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-09-01 14:57:04,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-09-01 14:57:04,343 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-09-01 14:57:04,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-09-01 14:57:04,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-09-01 14:57:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-09-01 14:57:04,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:04,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:04,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:04,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:04,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:04,551 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:04,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-09-01 14:57:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:04,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779105107] [2023-09-01 14:57:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:04,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:05,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:05,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779105107] [2023-09-01 14:57:05,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779105107] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:05,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805760480] [2023-09-01 14:57:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:57:05,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:05,061 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) [2023-09-01 14:57:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:57:05,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:05,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 14:57:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:05,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:57:05,437 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-09-01 14:57:05,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-09-01 14:57:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:05,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:05,585 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-09-01 14:57:05,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-09-01 14:57:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805760480] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:05,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:05,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-09-01 14:57:05,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537546468] [2023-09-01 14:57:05,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:05,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 14:57:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:05,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 14:57:05,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 14:57:07,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-09-01 14:57:07,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:07,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:07,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-09-01 14:57:07,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:12,093 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-09-01 14:57:12,093 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-09-01 14:57:12,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-09-01 14:57:12,097 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-09-01 14:57:12,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-09-01 14:57:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:57:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:57:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3398 transitions. [2023-09-01 14:57:12,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36814734561213436 [2023-09-01 14:57:12,105 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3398 transitions. [2023-09-01 14:57:12,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3398 transitions. [2023-09-01 14:57:12,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:12,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3398 transitions. [2023-09-01 14:57:12,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 130.69230769230768) internal successors, (3398), 26 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:12,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:12,127 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:12,127 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 3398 transitions. [2023-09-01 14:57:12,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-09-01 14:57:12,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-09-01 14:57:12,137 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-09-01 14:57:12,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-09-01 14:57:12,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-09-01 14:57:12,138 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-09-01 14:57:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:12,139 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:12,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 14:57:12,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-09-01 14:57:12,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:12,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:12,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-09-01 14:57:12,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:12,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305896123] [2023-09-01 14:57:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:12,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:13,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:13,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305896123] [2023-09-01 14:57:13,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305896123] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:13,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645888372] [2023-09-01 14:57:13,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:57:13,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:13,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:13,005 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) [2023-09-01 14:57:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:57:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:57:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 14:57:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:13,167 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 14:57:13,213 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:57:13,251 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:57:13,382 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:57:13,391 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-09-01 14:57:13,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-09-01 14:57:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:13,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:13,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:13,747 INFO L350 Elim1Store]: Elim1 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 218 treesize of output 134 [2023-09-01 14:57:13,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:13,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-09-01 14:57:13,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:13,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-09-01 14:57:13,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:13,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-09-01 14:57:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645888372] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:15,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:15,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-09-01 14:57:15,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928173670] [2023-09-01 14:57:15,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:15,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:57:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:57:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=234, Unknown=4, NotChecked=0, Total=306 [2023-09-01 14:57:17,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:19,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:19,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 14:57:19,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:19,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:19,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 14:57:19,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:19,970 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-09-01 14:57:19,970 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-09-01 14:57:19,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-09-01 14:57:19,973 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-09-01 14:57:19,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-09-01 14:57:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:57:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:57:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-09-01 14:57:19,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-09-01 14:57:19,976 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-09-01 14:57:19,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-09-01 14:57:19,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:19,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-09-01 14:57:19,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:19,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:19,982 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:19,982 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-09-01 14:57:19,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-09-01 14:57:19,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-09-01 14:57:19,988 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-09-01 14:57:19,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-09-01 14:57:19,989 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-09-01 14:57:19,989 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-09-01 14:57:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:19,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:19,990 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:19,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 14:57:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:20,195 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:20,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-09-01 14:57:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:20,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890430414] [2023-09-01 14:57:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:22,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890430414] [2023-09-01 14:57:22,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890430414] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:22,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034272208] [2023-09-01 14:57:22,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:57:22,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:22,490 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) [2023-09-01 14:57:22,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:57:22,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:57:22,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:57:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:22,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:22,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 14:57:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:22,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:22,987 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-09-01 14:57:22,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-09-01 14:57:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:57:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034272208] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:23,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-09-01 14:57:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060552640] [2023-09-01 14:57:23,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:23,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:57:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:57:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:57:24,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-09-01 14:57:24,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:24,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:24,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-09-01 14:57:24,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:25,967 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-09-01 14:57:25,967 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-09-01 14:57:25,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-09-01 14:57:25,975 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-09-01 14:57:25,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-09-01 14:57:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 14:57:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 14:57:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2571 transitions. [2023-09-01 14:57:25,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38117123795404 [2023-09-01 14:57:25,979 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2571 transitions. [2023-09-01 14:57:25,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2571 transitions. [2023-09-01 14:57:25,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:25,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2571 transitions. [2023-09-01 14:57:25,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.31578947368422) internal successors, (2571), 19 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,991 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:25,992 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2571 transitions. [2023-09-01 14:57:25,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-09-01 14:57:26,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-09-01 14:57:26,003 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-09-01 14:57:26,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-09-01 14:57:26,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-09-01 14:57:26,004 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-09-01 14:57:26,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:26,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:26,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:26,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:26,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:26,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:26,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-09-01 14:57:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803522463] [2023-09-01 14:57:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803522463] [2023-09-01 14:57:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803522463] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325512976] [2023-09-01 14:57:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:57:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:27,634 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) [2023-09-01 14:57:27,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:57:27,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:57:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:57:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:57:28,031 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-09-01 14:57:28,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-09-01 14:57:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:28,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:28,270 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-09-01 14:57:28,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-09-01 14:57:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325512976] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:28,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:28,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-09-01 14:57:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330989551] [2023-09-01 14:57:28,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-09-01 14:57:28,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-09-01 14:57:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-09-01 14:57:29,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-09-01 14:57:29,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:29,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:29,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-09-01 14:57:29,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:30,764 INFO L130 PetriNetUnfolder]: 586/1046 cut-off events. [2023-09-01 14:57:30,764 INFO L131 PetriNetUnfolder]: For 4386/4420 co-relation queries the response was YES. [2023-09-01 14:57:30,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 1046 events. 586/1046 cut-off events. For 4386/4420 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5106 event pairs, 75 based on Foata normal form. 28/1063 useless extension candidates. Maximal degree in co-relation 4871. Up to 610 conditions per place. [2023-09-01 14:57:30,774 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-09-01 14:57:30,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-09-01 14:57:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:57:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:57:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2696 transitions. [2023-09-01 14:57:30,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37971830985915495 [2023-09-01 14:57:30,779 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2696 transitions. [2023-09-01 14:57:30,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2696 transitions. [2023-09-01 14:57:30,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:30,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2696 transitions. [2023-09-01 14:57:30,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.8) internal successors, (2696), 20 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,791 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,791 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2696 transitions. [2023-09-01 14:57:30,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-09-01 14:57:30,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-09-01 14:57:30,805 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-09-01 14:57:30,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-09-01 14:57:30,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-09-01 14:57:30,806 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-09-01 14:57:30,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:30,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:30,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:30,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 14:57:31,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:57:31,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:31,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1517782303, now seen corresponding path program 6 times [2023-09-01 14:57:31,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:31,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166882499] [2023-09-01 14:57:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:32,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166882499] [2023-09-01 14:57:32,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166882499] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677418598] [2023-09-01 14:57:32,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:57:32,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:32,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:32,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:57:32,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:57:32,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:57:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:57:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:32,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:32,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 14:57:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:32,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:32,866 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-09-01 14:57:32,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-09-01 14:57:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:57:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677418598] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:33,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:33,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-09-01 14:57:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114200395] [2023-09-01 14:57:33,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:33,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:57:33,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:57:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:57:34,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-09-01 14:57:34,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:34,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:34,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-09-01 14:57:34,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:35,030 INFO L130 PetriNetUnfolder]: 758/1355 cut-off events. [2023-09-01 14:57:35,030 INFO L131 PetriNetUnfolder]: For 6049/6089 co-relation queries the response was YES. [2023-09-01 14:57:35,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7009 conditions, 1355 events. 758/1355 cut-off events. For 6049/6089 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6943 event pairs, 111 based on Foata normal form. 35/1379 useless extension candidates. Maximal degree in co-relation 6962. Up to 938 conditions per place. [2023-09-01 14:57:35,042 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-09-01 14:57:35,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-09-01 14:57:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-09-01 14:57:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-09-01 14:57:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2285 transitions. [2023-09-01 14:57:35,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37862468931234466 [2023-09-01 14:57:35,045 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2285 transitions. [2023-09-01 14:57:35,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2285 transitions. [2023-09-01 14:57:35,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:35,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2285 transitions. [2023-09-01 14:57:35,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.41176470588235) internal successors, (2285), 17 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:35,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:35,058 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:35,058 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 2285 transitions. [2023-09-01 14:57:35,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-09-01 14:57:35,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-09-01 14:57:35,084 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-09-01 14:57:35,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-09-01 14:57:35,086 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-09-01 14:57:35,086 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-09-01 14:57:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:35,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:35,087 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:35,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:35,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:57:35,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:35,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 272711525, now seen corresponding path program 7 times [2023-09-01 14:57:35,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:35,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74552405] [2023-09-01 14:57:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:35,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:36,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74552405] [2023-09-01 14:57:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74552405] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:36,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301052058] [2023-09-01 14:57:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:57:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:36,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:36,213 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:57:36,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:57:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 14:57:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:36,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:36,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 14:57:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:36,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:36,734 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-09-01 14:57:36,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-09-01 14:57:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301052058] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:36,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:36,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-09-01 14:57:36,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931998727] [2023-09-01 14:57:36,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:36,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:57:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:57:36,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:57:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 355 [2023-09-01 14:57:37,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:37,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:57:37,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 355 [2023-09-01 14:57:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:57:38,695 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-09-01 14:57:38,695 INFO L131 PetriNetUnfolder]: For 8685/8727 co-relation queries the response was YES. [2023-09-01 14:57:38,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8685/8727 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10330 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-09-01 14:57:38,714 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-09-01 14:57:38,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-09-01 14:57:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:57:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:57:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2792 transitions. [2023-09-01 14:57:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323943661971833 [2023-09-01 14:57:38,718 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2792 transitions. [2023-09-01 14:57:38,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2792 transitions. [2023-09-01 14:57:38,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:57:38,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2792 transitions. [2023-09-01 14:57:38,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 139.6) internal successors, (2792), 20 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:38,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:38,730 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:38,730 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2792 transitions. [2023-09-01 14:57:38,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-09-01 14:57:38,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-09-01 14:57:38,763 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-09-01 14:57:38,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-09-01 14:57:38,764 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-09-01 14:57:38,764 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-09-01 14:57:38,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:57:38,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:57:38,765 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:57:38,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:57:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-09-01 14:57:38,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:57:38,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:57:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-09-01 14:57:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:57:38,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615956480] [2023-09-01 14:57:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:57:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:57:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:57:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:57:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:57:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615956480] [2023-09-01 14:57:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615956480] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:57:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033545768] [2023-09-01 14:57:39,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:57:39,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:57:39,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:57:39,984 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:57:40,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:57:40,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:57:40,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:57:40,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:57:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:57:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:57:40,233 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-09-01 14:57:40,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:40,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 14:57:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:57:40,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:57:40,539 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:40,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-09-01 14:57:40,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:57:40,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-09-01 14:57:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:57:41,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033545768] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:57:41,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:57:41,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-09-01 14:57:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479315858] [2023-09-01 14:57:41,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:57:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:57:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:57:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:57:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=474, Unknown=4, NotChecked=0, Total=552 [2023-09-01 14:57:43,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:45,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:47,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:49,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:51,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:54,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:56,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:57:58,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:00,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:02,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:02,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-09-01 14:58:02,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:02,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:58:02,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-09-01 14:58:02,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:58:09,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:58:10,486 INFO L130 PetriNetUnfolder]: 1309/2356 cut-off events. [2023-09-01 14:58:10,486 INFO L131 PetriNetUnfolder]: For 12576/12618 co-relation queries the response was YES. [2023-09-01 14:58:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13026 conditions, 2356 events. 1309/2356 cut-off events. For 12576/12618 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13700 event pairs, 202 based on Foata normal form. 36/2381 useless extension candidates. Maximal degree in co-relation 12967. Up to 1490 conditions per place. [2023-09-01 14:58:10,511 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 192 selfloop transitions, 134 changer transitions 2/334 dead transitions. [2023-09-01 14:58:10,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 334 transitions, 4540 flow [2023-09-01 14:58:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:58:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:58:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2635 transitions. [2023-09-01 14:58:10,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227189222290263 [2023-09-01 14:58:10,516 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2635 transitions. [2023-09-01 14:58:10,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2635 transitions. [2023-09-01 14:58:10,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:58:10,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2635 transitions. [2023-09-01 14:58:10,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 114.56521739130434) internal successors, (2635), 23 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:10,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:10,528 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:10,529 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 23 states and 2635 transitions. [2023-09-01 14:58:10,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 334 transitions, 4540 flow [2023-09-01 14:58:10,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 334 transitions, 4300 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-09-01 14:58:10,584 INFO L231 Difference]: Finished difference. Result has 148 places, 269 transitions, 3767 flow [2023-09-01 14:58:10,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3767, PETRI_PLACES=148, PETRI_TRANSITIONS=269} [2023-09-01 14:58:10,585 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-09-01 14:58:10,585 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 269 transitions, 3767 flow [2023-09-01 14:58:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:58:10,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:58:10,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:58:10,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:58:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:58:10,792 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:58:10,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:58:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-09-01 14:58:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:58:10,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46576282] [2023-09-01 14:58:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:58:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:58:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:58:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:58:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46576282] [2023-09-01 14:58:12,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46576282] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:58:12,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210888919] [2023-09-01 14:58:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:58:12,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:58:12,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:58:12,361 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:58:12,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:58:12,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:58:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:58:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 14:58:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:58:12,782 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 14:58:12,831 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:58:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:58:12,917 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-09-01 14:58:13,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:13,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-09-01 14:58:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:58:13,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:58:13,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:13,652 INFO L350 Elim1Store]: Elim1 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 371 treesize of output 215 [2023-09-01 14:58:13,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:13,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-09-01 14:58:14,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:14,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-09-01 14:58:14,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:58:14,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-09-01 15:00:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:00:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210888919] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:00:53,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:00:53,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-09-01 15:00:53,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176690774] [2023-09-01 15:00:53,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:00:53,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 15:00:53,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:00:53,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 15:00:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=592, Unknown=5, NotChecked=0, Total=702 [2023-09-01 15:00:55,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:00:57,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:00,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:02,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 15:01:02,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 269 transitions, 3767 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:02,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:01:02,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 15:01:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:01:04,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:05,067 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~x1~0 c_~x2~0))) (and (or (let ((.cse0 (< c_~size~0 2))) (and (or .cse0 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or .cse1 .cse0))) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~2#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse2 (select .cse3 (+ c_~f~0.offset (* (select .cse3 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse4 (select .cse3 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse2 0) (= (select .cse3 (+ (* .cse4 4) c_~f~0.offset)) (select .cse3 (+ c_~f~0.offset (* 4 .cse2)))) (<= c_~size~0 .cse2) (< .cse4 0) (<= c_~size~0 .cse4))))) .cse1)) is different from false [2023-09-01 15:01:05,168 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse2 (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* .cse2 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* 4 .cse0)))) (<= c_~size~0 .cse0) (< .cse2 0) (<= c_~size~0 .cse2))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-09-01 15:01:07,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:13,480 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:01:15,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:17,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:20,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:22,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:28,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:31,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:31,663 INFO L130 PetriNetUnfolder]: 1909/3444 cut-off events. [2023-09-01 15:01:31,664 INFO L131 PetriNetUnfolder]: For 23581/23691 co-relation queries the response was YES. [2023-09-01 15:01:31,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20175 conditions, 3444 events. 1909/3444 cut-off events. For 23581/23691 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22079 event pairs, 403 based on Foata normal form. 102/3523 useless extension candidates. Maximal degree in co-relation 19435. Up to 1999 conditions per place. [2023-09-01 15:01:31,702 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 257 selfloop transitions, 207 changer transitions 2/472 dead transitions. [2023-09-01 15:01:31,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 472 transitions, 6846 flow [2023-09-01 15:01:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 15:01:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 15:01:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3235 transitions. [2023-09-01 15:01:31,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31423020883924235 [2023-09-01 15:01:31,707 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3235 transitions. [2023-09-01 15:01:31,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3235 transitions. [2023-09-01 15:01:31,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:01:31,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3235 transitions. [2023-09-01 15:01:31,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.55172413793103) internal successors, (3235), 29 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:31,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:31,719 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:31,720 INFO L175 Difference]: Start difference. First operand has 148 places, 269 transitions, 3767 flow. Second operand 29 states and 3235 transitions. [2023-09-01 15:01:31,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 472 transitions, 6846 flow [2023-09-01 15:01:31,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 472 transitions, 6471 flow, removed 170 selfloop flow, removed 6 redundant places. [2023-09-01 15:01:31,821 INFO L231 Difference]: Finished difference. Result has 178 places, 390 transitions, 5917 flow [2023-09-01 15:01:31,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5917, PETRI_PLACES=178, PETRI_TRANSITIONS=390} [2023-09-01 15:01:31,822 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-09-01 15:01:31,822 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 390 transitions, 5917 flow [2023-09-01 15:01:31,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:01:31,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:01:31,823 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:01:31,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 15:01:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:32,028 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:01:32,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:01:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2002851245, now seen corresponding path program 10 times [2023-09-01 15:01:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:01:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686811341] [2023-09-01 15:01:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:01:32,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:01:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:01:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:01:33,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:01:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686811341] [2023-09-01 15:01:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686811341] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:01:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899750878] [2023-09-01 15:01:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:01:33,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:01:33,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:01:33,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:01:33,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 15:01:33,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:01:33,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:01:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 15:01:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:01:33,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:01:33,601 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2023-09-01 15:01:33,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:33,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 15:01:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:01:33,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:01:33,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:33,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-09-01 15:01:33,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:01:33,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-09-01 15:01:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:01:34,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899750878] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:01:34,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:01:34,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-09-01 15:01:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134877818] [2023-09-01 15:01:34,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:01:34,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 15:01:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:01:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 15:01:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=476, Unknown=3, NotChecked=0, Total=552 [2023-09-01 15:01:36,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:38,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:40,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:43,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:45,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:47,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:49,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:51,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:53,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:55,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:57,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:01:59,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:01,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:03,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:05,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:06,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 15:02:06,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 390 transitions, 5917 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:06,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:06,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 15:02:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:12,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:13,818 INFO L130 PetriNetUnfolder]: 2179/3937 cut-off events. [2023-09-01 15:02:13,818 INFO L131 PetriNetUnfolder]: For 30895/30993 co-relation queries the response was YES. [2023-09-01 15:02:13,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24288 conditions, 3937 events. 2179/3937 cut-off events. For 30895/30993 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25933 event pairs, 381 based on Foata normal form. 92/4014 useless extension candidates. Maximal degree in co-relation 23442. Up to 2848 conditions per place. [2023-09-01 15:02:13,850 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 325 selfloop transitions, 155 changer transitions 2/488 dead transitions. [2023-09-01 15:02:13,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 488 transitions, 7963 flow [2023-09-01 15:02:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 15:02:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 15:02:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2344 transitions. [2023-09-01 15:02:13,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31441985244802145 [2023-09-01 15:02:13,854 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2344 transitions. [2023-09-01 15:02:13,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2344 transitions. [2023-09-01 15:02:13,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:13,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2344 transitions. [2023-09-01 15:02:13,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.61904761904762) internal successors, (2344), 21 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:13,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:13,862 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:13,863 INFO L175 Difference]: Start difference. First operand has 178 places, 390 transitions, 5917 flow. Second operand 21 states and 2344 transitions. [2023-09-01 15:02:13,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 488 transitions, 7963 flow [2023-09-01 15:02:14,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 488 transitions, 7500 flow, removed 194 selfloop flow, removed 12 redundant places. [2023-09-01 15:02:14,023 INFO L231 Difference]: Finished difference. Result has 191 places, 427 transitions, 6723 flow [2023-09-01 15:02:14,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6723, PETRI_PLACES=191, PETRI_TRANSITIONS=427} [2023-09-01 15:02:14,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-09-01 15:02:14,024 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 427 transitions, 6723 flow [2023-09-01 15:02:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:14,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:14,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:14,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-09-01 15:02:14,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-09-01 15:02:14,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:14,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1199004785, now seen corresponding path program 11 times [2023-09-01 15:02:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:14,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485772336] [2023-09-01 15:02:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:14,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:15,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:15,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485772336] [2023-09-01 15:02:15,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485772336] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:15,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644523864] [2023-09-01 15:02:15,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:02:15,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:15,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:15,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 15:02:15,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 15:02:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 15:02:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:02:15,928 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-09-01 15:02:16,027 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 15:02:16,072 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2023-09-01 15:02:16,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2023-09-01 15:02:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:16,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:16,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:16,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-09-01 15:02:16,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:16,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-09-01 15:02:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:17,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644523864] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:17,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:17,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-09-01 15:02:17,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220720600] [2023-09-01 15:02:17,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 15:02:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 15:02:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=487, Unknown=1, NotChecked=0, Total=552 [2023-09-01 15:02:19,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:21,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:23,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:25,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:27,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:27,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 15:02:27,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 427 transitions, 6723 flow. Second operand has 24 states, 24 states have (on average 107.625) internal successors, (2583), 24 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:27,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:27,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 15:02:27,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:32,196 INFO L130 PetriNetUnfolder]: 2549/4623 cut-off events. [2023-09-01 15:02:32,196 INFO L131 PetriNetUnfolder]: For 38056/38152 co-relation queries the response was YES. [2023-09-01 15:02:32,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28461 conditions, 4623 events. 2549/4623 cut-off events. For 38056/38152 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 31095 event pairs, 499 based on Foata normal form. 88/4696 useless extension candidates. Maximal degree in co-relation 27592. Up to 3228 conditions per place. [2023-09-01 15:02:32,234 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 328 selfloop transitions, 203 changer transitions 2/539 dead transitions. [2023-09-01 15:02:32,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 539 transitions, 9096 flow [2023-09-01 15:02:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 15:02:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 15:02:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2236 transitions. [2023-09-01 15:02:32,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149295774647887 [2023-09-01 15:02:32,238 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2236 transitions. [2023-09-01 15:02:32,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2236 transitions. [2023-09-01 15:02:32,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:32,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2236 transitions. [2023-09-01 15:02:32,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:32,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:32,246 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:32,246 INFO L175 Difference]: Start difference. First operand has 191 places, 427 transitions, 6723 flow. Second operand 20 states and 2236 transitions. [2023-09-01 15:02:32,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 539 transitions, 9096 flow [2023-09-01 15:02:32,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 539 transitions, 8807 flow, removed 98 selfloop flow, removed 11 redundant places. [2023-09-01 15:02:32,440 INFO L231 Difference]: Finished difference. Result has 204 places, 480 transitions, 8055 flow [2023-09-01 15:02:32,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8055, PETRI_PLACES=204, PETRI_TRANSITIONS=480} [2023-09-01 15:02:32,441 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 183 predicate places. [2023-09-01 15:02:32,442 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 480 transitions, 8055 flow [2023-09-01 15:02:32,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.625) internal successors, (2583), 24 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:32,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:32,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:32,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 15:02:32,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:32,648 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:32,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:32,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1578662035, now seen corresponding path program 12 times [2023-09-01 15:02:32,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:32,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340429959] [2023-09-01 15:02:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:32,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:34,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:34,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340429959] [2023-09-01 15:02:34,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340429959] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:34,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128992158] [2023-09-01 15:02:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:02:34,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:34,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:34,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 15:02:34,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:02:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 15:02:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:34,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:02:34,593 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 20 [2023-09-01 15:02:34,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:34,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 15:02:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:34,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:34,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-09-01 15:02:34,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:34,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-09-01 15:02:34,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:34,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-09-01 15:02:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128992158] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:35,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-09-01 15:02:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379207854] [2023-09-01 15:02:35,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 15:02:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 15:02:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=4, NotChecked=42, Total=552 [2023-09-01 15:02:35,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 15:02:35,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 480 transitions, 8055 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:35,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:35,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 15:02:35,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:38,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:02:40,085 INFO L130 PetriNetUnfolder]: 3028/5486 cut-off events. [2023-09-01 15:02:40,085 INFO L131 PetriNetUnfolder]: For 56932/57060 co-relation queries the response was YES. [2023-09-01 15:02:40,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35663 conditions, 5486 events. 3028/5486 cut-off events. For 56932/57060 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37809 event pairs, 592 based on Foata normal form. 120/5591 useless extension candidates. Maximal degree in co-relation 34702. Up to 3399 conditions per place. [2023-09-01 15:02:40,132 INFO L137 encePairwiseOnDemand]: 345/355 looper letters, 333 selfloop transitions, 292 changer transitions 2/633 dead transitions. [2023-09-01 15:02:40,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 633 transitions, 11669 flow [2023-09-01 15:02:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 15:02:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 15:02:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2248 transitions. [2023-09-01 15:02:40,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31661971830985913 [2023-09-01 15:02:40,136 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2248 transitions. [2023-09-01 15:02:40,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2248 transitions. [2023-09-01 15:02:40,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:40,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2248 transitions. [2023-09-01 15:02:40,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.4) internal successors, (2248), 20 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:40,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:40,144 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:40,144 INFO L175 Difference]: Start difference. First operand has 204 places, 480 transitions, 8055 flow. Second operand 20 states and 2248 transitions. [2023-09-01 15:02:40,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 633 transitions, 11669 flow [2023-09-01 15:02:40,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 633 transitions, 11349 flow, removed 113 selfloop flow, removed 9 redundant places. [2023-09-01 15:02:40,416 INFO L231 Difference]: Finished difference. Result has 218 places, 567 transitions, 10569 flow [2023-09-01 15:02:40,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=7771, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10569, PETRI_PLACES=218, PETRI_TRANSITIONS=567} [2023-09-01 15:02:40,416 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-09-01 15:02:40,417 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 567 transitions, 10569 flow [2023-09-01 15:02:40,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:40,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:40,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:40,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-09-01 15:02:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:40,618 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:40,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2087719488, now seen corresponding path program 13 times [2023-09-01 15:02:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88987458] [2023-09-01 15:02:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 15:02:43,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:43,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88987458] [2023-09-01 15:02:43,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88987458] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:43,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456696114] [2023-09-01 15:02:43,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:02:43,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:43,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:43,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:43,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 15:02:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:43,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2023-09-01 15:02:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 15:02:43,847 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 24 [2023-09-01 15:02:43,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:43,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-09-01 15:02:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 15:02:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:43,947 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_640 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_640) c_~f~0.base))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))) c_~x1~0)) is different from false [2023-09-01 15:02:44,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:44,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-09-01 15:02:44,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 15:02:44,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2023-09-01 15:02:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-09-01 15:02:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456696114] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:44,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:44,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2023-09-01 15:02:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035511548] [2023-09-01 15:02:44,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:44,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 15:02:44,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 15:02:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=523, Unknown=5, NotChecked=46, Total=650 [2023-09-01 15:02:44,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-09-01 15:02:44,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 567 transitions, 10569 flow. Second operand has 26 states, 26 states have (on average 107.65384615384616) internal successors, (2799), 26 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:44,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:44,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-09-01 15:02:44,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:02:47,592 INFO L130 PetriNetUnfolder]: 3805/6914 cut-off events. [2023-09-01 15:02:47,593 INFO L131 PetriNetUnfolder]: For 88801/88957 co-relation queries the response was YES. [2023-09-01 15:02:47,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50228 conditions, 6914 events. 3805/6914 cut-off events. For 88801/88957 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49827 event pairs, 835 based on Foata normal form. 150/7042 useless extension candidates. Maximal degree in co-relation 49096. Up to 5057 conditions per place. [2023-09-01 15:02:47,650 INFO L137 encePairwiseOnDemand]: 344/355 looper letters, 490 selfloop transitions, 307 changer transitions 2/805 dead transitions. [2023-09-01 15:02:47,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 805 transitions, 16314 flow [2023-09-01 15:02:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-09-01 15:02:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-09-01 15:02:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2462 transitions. [2023-09-01 15:02:47,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31523687580025606 [2023-09-01 15:02:47,653 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2462 transitions. [2023-09-01 15:02:47,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2462 transitions. [2023-09-01 15:02:47,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:02:47,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2462 transitions. [2023-09-01 15:02:47,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 111.9090909090909) internal successors, (2462), 22 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:47,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:47,662 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:47,662 INFO L175 Difference]: Start difference. First operand has 218 places, 567 transitions, 10569 flow. Second operand 22 states and 2462 transitions. [2023-09-01 15:02:47,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 805 transitions, 16314 flow [2023-09-01 15:02:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 805 transitions, 15429 flow, removed 363 selfloop flow, removed 9 redundant places. [2023-09-01 15:02:48,020 INFO L231 Difference]: Finished difference. Result has 236 places, 739 transitions, 14377 flow [2023-09-01 15:02:48,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=10052, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14377, PETRI_PLACES=236, PETRI_TRANSITIONS=739} [2023-09-01 15:02:48,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-09-01 15:02:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 739 transitions, 14377 flow [2023-09-01 15:02:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 107.65384615384616) internal successors, (2799), 26 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:48,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:02:48,021 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:02:48,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 15:02:48,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 15:02:48,222 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:02:48,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:02:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash 663082433, now seen corresponding path program 14 times [2023-09-01 15:02:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:02:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911313545] [2023-09-01 15:02:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:02:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:02:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:02:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:48,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:02:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911313545] [2023-09-01 15:02:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911313545] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:02:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484561913] [2023-09-01 15:02:48,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:02:48,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:02:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:02:48,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:02:48,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 15:02:48,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:02:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:02:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:02:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:02:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:48,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:02:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:02:49,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484561913] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:02:49,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:02:49,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-09-01 15:02:49,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143588284] [2023-09-01 15:02:49,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:02:49,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 15:02:49,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:02:49,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 15:02:49,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 15:02:49,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:02:49,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 739 transitions, 14377 flow. Second operand has 15 states, 15 states have (on average 143.06666666666666) internal successors, (2146), 15 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:02:49,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:02:49,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:02:49,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:14,251 INFO L130 PetriNetUnfolder]: 8644/15781 cut-off events. [2023-09-01 15:03:14,252 INFO L131 PetriNetUnfolder]: For 195413/195413 co-relation queries the response was YES. [2023-09-01 15:03:14,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119315 conditions, 15781 events. 8644/15781 cut-off events. For 195413/195413 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 129083 event pairs, 1305 based on Foata normal form. 129/15910 useless extension candidates. Maximal degree in co-relation 118006. Up to 6912 conditions per place. [2023-09-01 15:03:14,404 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 944 selfloop transitions, 559 changer transitions 0/1503 dead transitions. [2023-09-01 15:03:14,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1503 transitions, 31677 flow [2023-09-01 15:03:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 15:03:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 15:03:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2682 transitions. [2023-09-01 15:03:14,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-09-01 15:03:14,407 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2682 transitions. [2023-09-01 15:03:14,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2682 transitions. [2023-09-01 15:03:14,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:14,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2682 transitions. [2023-09-01 15:03:14,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.0) internal successors, (2682), 18 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:14,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:14,415 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:14,416 INFO L175 Difference]: Start difference. First operand has 236 places, 739 transitions, 14377 flow. Second operand 18 states and 2682 transitions. [2023-09-01 15:03:14,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1503 transitions, 31677 flow [2023-09-01 15:03:15,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1503 transitions, 30206 flow, removed 727 selfloop flow, removed 5 redundant places. [2023-09-01 15:03:15,378 INFO L231 Difference]: Finished difference. Result has 258 places, 1089 transitions, 23337 flow [2023-09-01 15:03:15,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=13454, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23337, PETRI_PLACES=258, PETRI_TRANSITIONS=1089} [2023-09-01 15:03:15,379 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2023-09-01 15:03:15,379 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1089 transitions, 23337 flow [2023-09-01 15:03:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.06666666666666) internal successors, (2146), 15 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:15,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:15,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-09-01 15:03:15,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:15,580 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:15,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash 436220956, now seen corresponding path program 15 times [2023-09-01 15:03:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:15,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671046308] [2023-09-01 15:03:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:15,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671046308] [2023-09-01 15:03:15,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671046308] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:15,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811210534] [2023-09-01 15:03:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:03:15,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:15,801 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:15,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 15:03:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:03:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:17,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811210534] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:17,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:17,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-09-01 15:03:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469222352] [2023-09-01 15:03:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 15:03:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:17,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 15:03:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-09-01 15:03:17,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:03:17,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1089 transitions, 23337 flow. Second operand has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:17,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:17,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:03:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:23,899 INFO L130 PetriNetUnfolder]: 8763/16285 cut-off events. [2023-09-01 15:03:23,899 INFO L131 PetriNetUnfolder]: For 294640/294640 co-relation queries the response was YES. [2023-09-01 15:03:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134821 conditions, 16285 events. 8763/16285 cut-off events. For 294640/294640 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 140406 event pairs, 1456 based on Foata normal form. 136/16421 useless extension candidates. Maximal degree in co-relation 133501. Up to 7135 conditions per place. [2023-09-01 15:03:24,084 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1360 selfloop transitions, 382 changer transitions 89/1831 dead transitions. [2023-09-01 15:03:24,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1831 transitions, 43013 flow [2023-09-01 15:03:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 15:03:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 15:03:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2347 transitions. [2023-09-01 15:03:24,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41320422535211265 [2023-09-01 15:03:24,086 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2347 transitions. [2023-09-01 15:03:24,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2347 transitions. [2023-09-01 15:03:24,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:24,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2347 transitions. [2023-09-01 15:03:24,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 146.6875) internal successors, (2347), 16 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:24,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:24,092 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:24,092 INFO L175 Difference]: Start difference. First operand has 258 places, 1089 transitions, 23337 flow. Second operand 16 states and 2347 transitions. [2023-09-01 15:03:24,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1831 transitions, 43013 flow [2023-09-01 15:03:25,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1831 transitions, 41423 flow, removed 668 selfloop flow, removed 4 redundant places. [2023-09-01 15:03:25,857 INFO L231 Difference]: Finished difference. Result has 275 places, 1261 transitions, 26969 flow [2023-09-01 15:03:25,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=22137, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=26969, PETRI_PLACES=275, PETRI_TRANSITIONS=1261} [2023-09-01 15:03:25,859 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-09-01 15:03:25,859 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 1261 transitions, 26969 flow [2023-09-01 15:03:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:25,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:25,859 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:25,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:26,060 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:26,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 16 times [2023-09-01 15:03:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:26,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478527606] [2023-09-01 15:03:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478527606] [2023-09-01 15:03:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478527606] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095157331] [2023-09-01 15:03:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:03:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:26,283 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:26,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 15:03:26,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:03:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:26,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095157331] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:26,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:26,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-09-01 15:03:26,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998560180] [2023-09-01 15:03:26,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 15:03:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 15:03:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-09-01 15:03:27,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:03:27,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 1261 transitions, 26969 flow. Second operand has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:27,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:27,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:03:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:34,787 INFO L130 PetriNetUnfolder]: 8695/16212 cut-off events. [2023-09-01 15:03:34,787 INFO L131 PetriNetUnfolder]: For 305513/305513 co-relation queries the response was YES. [2023-09-01 15:03:34,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143471 conditions, 16212 events. 8695/16212 cut-off events. For 305513/305513 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 137462 event pairs, 4006 based on Foata normal form. 22/16234 useless extension candidates. Maximal degree in co-relation 142020. Up to 12582 conditions per place. [2023-09-01 15:03:35,286 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 958 selfloop transitions, 545 changer transitions 6/1509 dead transitions. [2023-09-01 15:03:35,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1509 transitions, 34706 flow [2023-09-01 15:03:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-09-01 15:03:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-09-01 15:03:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3677 transitions. [2023-09-01 15:03:35,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41430985915492957 [2023-09-01 15:03:35,289 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3677 transitions. [2023-09-01 15:03:35,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3677 transitions. [2023-09-01 15:03:35,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:35,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3677 transitions. [2023-09-01 15:03:35,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 147.08) internal successors, (3677), 25 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:35,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:35,299 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:35,299 INFO L175 Difference]: Start difference. First operand has 275 places, 1261 transitions, 26969 flow. Second operand 25 states and 3677 transitions. [2023-09-01 15:03:35,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1509 transitions, 34706 flow [2023-09-01 15:03:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1509 transitions, 33322 flow, removed 692 selfloop flow, removed 2 redundant places. [2023-09-01 15:03:38,018 INFO L231 Difference]: Finished difference. Result has 309 places, 1371 transitions, 29779 flow [2023-09-01 15:03:38,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=25825, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29779, PETRI_PLACES=309, PETRI_TRANSITIONS=1371} [2023-09-01 15:03:38,020 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-09-01 15:03:38,020 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 1371 transitions, 29779 flow [2023-09-01 15:03:38,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:38,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:38,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:38,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:38,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:38,221 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:38,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2120764327, now seen corresponding path program 17 times [2023-09-01 15:03:38,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:38,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603348883] [2023-09-01 15:03:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:38,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:38,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:38,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603348883] [2023-09-01 15:03:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603348883] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:38,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962584752] [2023-09-01 15:03:38,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:03:38,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:38,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:38,393 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 15:03:38,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 15:03:38,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962584752] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:38,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:38,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 15:03:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355302669] [2023-09-01 15:03:38,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:38,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:03:38,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:38,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:03:38,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-09-01 15:03:39,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:03:39,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1371 transitions, 29779 flow. Second operand has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:39,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:03:39,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:03:39,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:03:47,111 INFO L130 PetriNetUnfolder]: 9089/16896 cut-off events. [2023-09-01 15:03:47,112 INFO L131 PetriNetUnfolder]: For 355652/355652 co-relation queries the response was YES. [2023-09-01 15:03:47,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155911 conditions, 16896 events. 9089/16896 cut-off events. For 355652/355652 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 143595 event pairs, 1275 based on Foata normal form. 129/17025 useless extension candidates. Maximal degree in co-relation 154364. Up to 7431 conditions per place. [2023-09-01 15:03:47,314 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1048 selfloop transitions, 834 changer transitions 3/1885 dead transitions. [2023-09-01 15:03:47,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1885 transitions, 42814 flow [2023-09-01 15:03:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 15:03:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 15:03:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3417 transitions. [2023-09-01 15:03:47,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184935701163503 [2023-09-01 15:03:47,317 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3417 transitions. [2023-09-01 15:03:47,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3417 transitions. [2023-09-01 15:03:47,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:03:47,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3417 transitions. [2023-09-01 15:03:47,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.56521739130434) internal successors, (3417), 23 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,327 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:47,327 INFO L175 Difference]: Start difference. First operand has 309 places, 1371 transitions, 29779 flow. Second operand 23 states and 3417 transitions. [2023-09-01 15:03:47,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1885 transitions, 42814 flow [2023-09-01 15:03:50,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1885 transitions, 41497 flow, removed 352 selfloop flow, removed 6 redundant places. [2023-09-01 15:03:50,063 INFO L231 Difference]: Finished difference. Result has 333 places, 1456 transitions, 32470 flow [2023-09-01 15:03:50,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=28462, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=32470, PETRI_PLACES=333, PETRI_TRANSITIONS=1456} [2023-09-01 15:03:50,065 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 312 predicate places. [2023-09-01 15:03:50,065 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1456 transitions, 32470 flow [2023-09-01 15:03:50,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:03:50,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:03:50,066 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:03:50,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 15:03:50,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 15:03:50,273 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:03:50,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:03:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 18 times [2023-09-01 15:03:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:03:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830563152] [2023-09-01 15:03:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:03:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:03:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:03:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:03:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830563152] [2023-09-01 15:03:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830563152] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:03:50,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048841145] [2023-09-01 15:03:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:03:50,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:03:50,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:03:50,480 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:03:50,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 15:03:50,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 15:03:50,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:03:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:03:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:03:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:52,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:03:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:03:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048841145] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:03:53,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:03:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-09-01 15:03:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433444363] [2023-09-01 15:03:53,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:03:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:03:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:03:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:03:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=272, Unknown=1, NotChecked=0, Total=342 [2023-09-01 15:03:55,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 15:03:58,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 15:04:00,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-09-01 15:04:00,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-09-01 15:04:00,122 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1456 transitions, 32470 flow. Second operand has 19 states, 19 states have (on average 139.78947368421052) internal successors, (2656), 19 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:00,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:00,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-09-01 15:04:00,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:02,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-09-01 15:04:14,250 INFO L130 PetriNetUnfolder]: 9651/19924 cut-off events. [2023-09-01 15:04:14,250 INFO L131 PetriNetUnfolder]: For 549880/549880 co-relation queries the response was YES. [2023-09-01 15:04:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192424 conditions, 19924 events. 9651/19924 cut-off events. For 549880/549880 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 196796 event pairs, 1664 based on Foata normal form. 60/19984 useless extension candidates. Maximal degree in co-relation 190521. Up to 8664 conditions per place. [2023-09-01 15:04:14,592 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1378 selfloop transitions, 958 changer transitions 11/2347 dead transitions. [2023-09-01 15:04:14,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 2347 transitions, 58191 flow [2023-09-01 15:04:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 15:04:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 15:04:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5010 transitions. [2023-09-01 15:04:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40321931589537224 [2023-09-01 15:04:14,704 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5010 transitions. [2023-09-01 15:04:14,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5010 transitions. [2023-09-01 15:04:14,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:04:14,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5010 transitions. [2023-09-01 15:04:14,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 143.14285714285714) internal successors, (5010), 35 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:14,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:14,717 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:14,718 INFO L175 Difference]: Start difference. First operand has 333 places, 1456 transitions, 32470 flow. Second operand 35 states and 5010 transitions. [2023-09-01 15:04:14,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 2347 transitions, 58191 flow [2023-09-01 15:04:18,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2347 transitions, 57059 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-09-01 15:04:18,835 INFO L231 Difference]: Finished difference. Result has 365 places, 1870 transitions, 45035 flow [2023-09-01 15:04:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=30995, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=45035, PETRI_PLACES=365, PETRI_TRANSITIONS=1870} [2023-09-01 15:04:18,837 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 344 predicate places. [2023-09-01 15:04:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1870 transitions, 45035 flow [2023-09-01 15:04:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.78947368421052) internal successors, (2656), 19 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:18,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:04:18,837 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:04:18,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 15:04:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 15:04:19,044 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:04:19,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:04:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 134782133, now seen corresponding path program 19 times [2023-09-01 15:04:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:04:19,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89017389] [2023-09-01 15:04:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:04:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:04:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:04:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89017389] [2023-09-01 15:04:19,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89017389] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:04:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041649373] [2023-09-01 15:04:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 15:04:19,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:04:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:04:19,221 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:04:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 15:04:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:04:19,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:04:19,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:04:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:19,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:04:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:04:19,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041649373] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:04:19,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:04:19,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 15:04:19,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747175312] [2023-09-01 15:04:19,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:04:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 15:04:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:04:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 15:04:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-09-01 15:04:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:04:20,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1870 transitions, 45035 flow. Second operand has 17 states, 17 states have (on average 142.94117647058823) internal successors, (2430), 17 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:04:20,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:04:20,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:04:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:04:25,862 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296))) (and (forall ((~n~0 Int)) (let ((.cse0 (* 3 ~n~0))) (or (<= (mod .cse0 4294967296) .cse1) (<= (+ (* 4294967296 (div .cse0 4294967296)) 4) .cse0)))) (forall ((~n~0 Int)) (let ((.cse2 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse2 4294967296)) 4) .cse2) (<= (mod .cse2 4294967296) (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296))))) (forall ((~n~0 Int)) (let ((.cse3 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse3 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 4) (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse3)) (<= (mod .cse3 4294967296) .cse1)))) (forall ((~n~0 Int)) (let ((.cse4 (* 3 ~n~0))) (or (<= (mod .cse4 4294967296) (mod (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse4 4294967296)) 4) .cse4)))) (forall ((~n~0 Int)) (let ((.cse5 (* 3 ~n~0))) (or (<= (mod .cse5 4294967296) (mod (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse5 4294967296)) 4) .cse5)))) (forall ((~n~0 Int)) (let ((.cse6 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse6 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296) .cse6)) (<= (mod .cse6 4294967296) .cse1)))))) is different from false [2023-09-01 15:04:49,775 WARN L222 SmtUtils]: Spent 21.69s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:04:56,204 WARN L222 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 42 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:05:01,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:03,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:05,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:15,337 WARN L222 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 45 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:05:17,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:20,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:22,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:31,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:45,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:47,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:55,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:05:56,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:06:09,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:06:12,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:06:15,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:06:24,995 INFO L130 PetriNetUnfolder]: 10491/21531 cut-off events. [2023-09-01 15:06:24,996 INFO L131 PetriNetUnfolder]: For 676030/676030 co-relation queries the response was YES. [2023-09-01 15:06:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217186 conditions, 21531 events. 10491/21531 cut-off events. For 676030/676030 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 211846 event pairs, 2127 based on Foata normal form. 149/21680 useless extension candidates. Maximal degree in co-relation 215352. Up to 9090 conditions per place. [2023-09-01 15:06:25,358 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 1309 selfloop transitions, 1377 changer transitions 6/2692 dead transitions. [2023-09-01 15:06:25,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 2692 transitions, 66077 flow [2023-09-01 15:06:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-09-01 15:06:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-09-01 15:06:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7075 transitions. [2023-09-01 15:06:25,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41519953051643194 [2023-09-01 15:06:25,364 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7075 transitions. [2023-09-01 15:06:25,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7075 transitions. [2023-09-01 15:06:25,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:06:25,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7075 transitions. [2023-09-01 15:06:25,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 147.39583333333334) internal successors, (7075), 48 states have internal predecessors, (7075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:25,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 355.0) internal successors, (17395), 49 states have internal predecessors, (17395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:25,384 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 355.0) internal successors, (17395), 49 states have internal predecessors, (17395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:25,384 INFO L175 Difference]: Start difference. First operand has 365 places, 1870 transitions, 45035 flow. Second operand 48 states and 7075 transitions. [2023-09-01 15:06:25,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 2692 transitions, 66077 flow [2023-09-01 15:06:31,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 2692 transitions, 64518 flow, removed 361 selfloop flow, removed 15 redundant places. [2023-09-01 15:06:31,086 INFO L231 Difference]: Finished difference. Result has 415 places, 2104 transitions, 53305 flow [2023-09-01 15:06:31,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=43653, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=53305, PETRI_PLACES=415, PETRI_TRANSITIONS=2104} [2023-09-01 15:06:31,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 394 predicate places. [2023-09-01 15:06:31,089 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 2104 transitions, 53305 flow [2023-09-01 15:06:31,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 142.94117647058823) internal successors, (2430), 17 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:31,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:06:31,089 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:06:31,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 15:06:31,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 15:06:31,296 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:06:31,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:06:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 542179494, now seen corresponding path program 20 times [2023-09-01 15:06:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:06:31,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152942032] [2023-09-01 15:06:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:06:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:06:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:06:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:06:31,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152942032] [2023-09-01 15:06:31,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152942032] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:06:31,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425746930] [2023-09-01 15:06:31,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 15:06:31,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:06:31,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:06:31,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:06:31,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 15:06:31,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 15:06:31,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:06:31,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:06:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:06:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:31,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:06:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:06:31,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425746930] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:06:31,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:06:31,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-09-01 15:06:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855886307] [2023-09-01 15:06:31,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:06:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 15:06:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:06:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 15:06:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-09-01 15:06:32,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:06:32,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 2104 transitions, 53305 flow. Second operand has 17 states, 17 states have (on average 142.76470588235293) internal successors, (2427), 17 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:32,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:06:32,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:06:32,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:06:55,544 INFO L130 PetriNetUnfolder]: 10832/22208 cut-off events. [2023-09-01 15:06:55,544 INFO L131 PetriNetUnfolder]: For 932800/932800 co-relation queries the response was YES. [2023-09-01 15:06:55,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249333 conditions, 22208 events. 10832/22208 cut-off events. For 932800/932800 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 219887 event pairs, 5007 based on Foata normal form. 30/22238 useless extension candidates. Maximal degree in co-relation 248059. Up to 20623 conditions per place. [2023-09-01 15:06:56,088 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1954 selfloop transitions, 412 changer transitions 2/2368 dead transitions. [2023-09-01 15:06:56,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2368 transitions, 63848 flow [2023-09-01 15:06:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 15:06:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 15:06:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5395 transitions. [2023-09-01 15:06:56,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41073467834031213 [2023-09-01 15:06:56,093 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5395 transitions. [2023-09-01 15:06:56,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5395 transitions. [2023-09-01 15:06:56,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:06:56,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5395 transitions. [2023-09-01 15:06:56,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 145.8108108108108) internal successors, (5395), 37 states have internal predecessors, (5395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:56,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 355.0) internal successors, (13490), 38 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:56,107 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 355.0) internal successors, (13490), 38 states have internal predecessors, (13490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:06:56,107 INFO L175 Difference]: Start difference. First operand has 415 places, 2104 transitions, 53305 flow. Second operand 37 states and 5395 transitions. [2023-09-01 15:06:56,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2368 transitions, 63848 flow [2023-09-01 15:07:04,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 2368 transitions, 61502 flow, removed 467 selfloop flow, removed 20 redundant places. [2023-09-01 15:07:04,380 INFO L231 Difference]: Finished difference. Result has 454 places, 2244 transitions, 55872 flow [2023-09-01 15:07:04,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=51099, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=55872, PETRI_PLACES=454, PETRI_TRANSITIONS=2244} [2023-09-01 15:07:04,382 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 433 predicate places. [2023-09-01 15:07:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 2244 transitions, 55872 flow [2023-09-01 15:07:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 142.76470588235293) internal successors, (2427), 17 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:07:04,382 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:07:04,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-09-01 15:07:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:04,583 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:07:04,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:07:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1518686751, now seen corresponding path program 21 times [2023-09-01 15:07:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:07:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999495409] [2023-09-01 15:07:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:07:04,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:07:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:07:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999495409] [2023-09-01 15:07:04,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999495409] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:07:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330786450] [2023-09-01 15:07:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 15:07:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:07:04,747 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:07:04,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 15:07:05,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 15:07:05,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:07:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:07:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:07:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:05,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:07:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:05,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330786450] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:07:05,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:07:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-09-01 15:07:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063062904] [2023-09-01 15:07:05,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:07:05,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 15:07:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:07:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 15:07:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-09-01 15:07:06,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:07:06,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 2244 transitions, 55872 flow. Second operand has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:06,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:07:06,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:07:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:07:32,662 INFO L130 PetriNetUnfolder]: 11474/23390 cut-off events. [2023-09-01 15:07:32,662 INFO L131 PetriNetUnfolder]: For 1136894/1136894 co-relation queries the response was YES. [2023-09-01 15:07:33,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272749 conditions, 23390 events. 11474/23390 cut-off events. For 1136894/1136894 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 232485 event pairs, 3489 based on Foata normal form. 117/23507 useless extension candidates. Maximal degree in co-relation 272127. Up to 10779 conditions per place. [2023-09-01 15:07:33,144 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1527 selfloop transitions, 1192 changer transitions 6/2725 dead transitions. [2023-09-01 15:07:33,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 2725 transitions, 71657 flow [2023-09-01 15:07:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-09-01 15:07:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-09-01 15:07:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4143 transitions. [2023-09-01 15:07:33,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41680080482897386 [2023-09-01 15:07:33,147 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4143 transitions. [2023-09-01 15:07:33,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4143 transitions. [2023-09-01 15:07:33,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:07:33,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4143 transitions. [2023-09-01 15:07:33,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 147.96428571428572) internal successors, (4143), 28 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:33,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:33,155 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:33,156 INFO L175 Difference]: Start difference. First operand has 454 places, 2244 transitions, 55872 flow. Second operand 28 states and 4143 transitions. [2023-09-01 15:07:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 2725 transitions, 71657 flow [2023-09-01 15:07:43,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 2725 transitions, 70717 flow, removed 415 selfloop flow, removed 5 redundant places. [2023-09-01 15:07:43,294 INFO L231 Difference]: Finished difference. Result has 488 places, 2364 transitions, 61699 flow [2023-09-01 15:07:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=54860, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=61699, PETRI_PLACES=488, PETRI_TRANSITIONS=2364} [2023-09-01 15:07:43,296 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 467 predicate places. [2023-09-01 15:07:43,296 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 2364 transitions, 61699 flow [2023-09-01 15:07:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.94444444444446) internal successors, (2573), 18 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:07:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:07:43,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-09-01 15:07:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:43,503 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:07:43,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:07:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2023740468, now seen corresponding path program 22 times [2023-09-01 15:07:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:07:43,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061607276] [2023-09-01 15:07:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:07:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:07:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:07:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:43,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:07:43,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061607276] [2023-09-01 15:07:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061607276] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:07:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541240375] [2023-09-01 15:07:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 15:07:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:07:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:07:43,712 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:07:43,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 15:07:43,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 15:07:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:07:43,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:07:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:07:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:07:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:07:44,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541240375] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:07:44,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:07:44,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-09-01 15:07:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133148050] [2023-09-01 15:07:44,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:07:44,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:07:44,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:07:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:07:44,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-09-01 15:07:44,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:07:44,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 2364 transitions, 61699 flow. Second operand has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:07:44,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:07:44,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:07:44,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:07:52,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:08:08,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:08:12,328 INFO L130 PetriNetUnfolder]: 11921/24325 cut-off events. [2023-09-01 15:08:12,328 INFO L131 PetriNetUnfolder]: For 1429227/1429227 co-relation queries the response was YES. [2023-09-01 15:08:12,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301349 conditions, 24325 events. 11921/24325 cut-off events. For 1429227/1429227 co-relation queries the response was YES. Maximal size of possible extension queue 1492. Compared 243799 event pairs, 5290 based on Foata normal form. 48/24373 useless extension candidates. Maximal degree in co-relation 300564. Up to 21899 conditions per place. [2023-09-01 15:08:12,754 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 2098 selfloop transitions, 524 changer transitions 3/2625 dead transitions. [2023-09-01 15:08:12,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 2625 transitions, 73951 flow [2023-09-01 15:08:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-09-01 15:08:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-09-01 15:08:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4703 transitions. [2023-09-01 15:08:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139964788732394 [2023-09-01 15:08:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4703 transitions. [2023-09-01 15:08:12,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4703 transitions. [2023-09-01 15:08:12,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:08:12,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4703 transitions. [2023-09-01 15:08:12,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 146.96875) internal successors, (4703), 32 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:12,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:12,766 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:12,766 INFO L175 Difference]: Start difference. First operand has 488 places, 2364 transitions, 61699 flow. Second operand 32 states and 4703 transitions. [2023-09-01 15:08:12,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 2625 transitions, 73951 flow [2023-09-01 15:08:25,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 2625 transitions, 72529 flow, removed 386 selfloop flow, removed 11 redundant places. [2023-09-01 15:08:25,085 INFO L231 Difference]: Finished difference. Result has 522 places, 2483 transitions, 66141 flow [2023-09-01 15:08:25,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=60224, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=66141, PETRI_PLACES=522, PETRI_TRANSITIONS=2483} [2023-09-01 15:08:25,087 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 501 predicate places. [2023-09-01 15:08:25,088 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2483 transitions, 66141 flow [2023-09-01 15:08:25,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:25,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:08:25,088 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:08:25,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 15:08:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-09-01 15:08:25,289 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:08:25,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:08:25,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1125104591, now seen corresponding path program 23 times [2023-09-01 15:08:25,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:08:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606703625] [2023-09-01 15:08:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:08:25,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:08:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:08:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:25,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:08:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606703625] [2023-09-01 15:08:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606703625] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:08:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022559724] [2023-09-01 15:08:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 15:08:25,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:08:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:08:25,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:08:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 15:08:25,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 15:08:25,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:08:25,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:08:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:08:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:25,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:08:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:08:26,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022559724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:08:26,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:08:26,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-09-01 15:08:26,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363139383] [2023-09-01 15:08:26,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:08:26,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:08:26,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:08:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:08:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-09-01 15:08:26,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:08:26,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2483 transitions, 66141 flow. Second operand has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:08:26,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:08:26,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:08:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 15:08:37,826 WARN L222 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 15:08:58,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-09-01 15:09:30,639 INFO L130 PetriNetUnfolder]: 12479/25357 cut-off events. [2023-09-01 15:09:30,639 INFO L131 PetriNetUnfolder]: For 1801068/1801068 co-relation queries the response was YES. [2023-09-01 15:09:31,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332264 conditions, 25357 events. 12479/25357 cut-off events. For 1801068/1801068 co-relation queries the response was YES. Maximal size of possible extension queue 1555. Compared 254732 event pairs, 3493 based on Foata normal form. 149/25506 useless extension candidates. Maximal degree in co-relation 331703. Up to 10597 conditions per place. [2023-09-01 15:09:31,627 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1485 selfloop transitions, 1550 changer transitions 9/3044 dead transitions. [2023-09-01 15:09:31,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 3044 transitions, 84258 flow [2023-09-01 15:09:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-09-01 15:09:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-09-01 15:09:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6187 transitions. [2023-09-01 15:09:31,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4149564050972502 [2023-09-01 15:09:31,632 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6187 transitions. [2023-09-01 15:09:31,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6187 transitions. [2023-09-01 15:09:31,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 15:09:31,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6187 transitions. [2023-09-01 15:09:31,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 147.3095238095238) internal successors, (6187), 42 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:31,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:31,644 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:31,644 INFO L175 Difference]: Start difference. First operand has 522 places, 2483 transitions, 66141 flow. Second operand 42 states and 6187 transitions. [2023-09-01 15:09:31,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 3044 transitions, 84258 flow [2023-09-01 15:09:48,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 3044 transitions, 82807 flow, removed 649 selfloop flow, removed 8 redundant places. [2023-09-01 15:09:48,463 INFO L231 Difference]: Finished difference. Result has 564 places, 2618 transitions, 72617 flow [2023-09-01 15:09:48,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=64683, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1413, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=72617, PETRI_PLACES=564, PETRI_TRANSITIONS=2618} [2023-09-01 15:09:48,465 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 543 predicate places. [2023-09-01 15:09:48,465 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 2618 transitions, 72617 flow [2023-09-01 15:09:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 15:09:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 15:09:48,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 15:09:48,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 15:09:48,666 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 15:09:48,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 15:09:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 611628953, now seen corresponding path program 24 times [2023-09-01 15:09:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 15:09:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14314762] [2023-09-01 15:09:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 15:09:48,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 15:09:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 15:09:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:48,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 15:09:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14314762] [2023-09-01 15:09:48,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14314762] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 15:09:48,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034278049] [2023-09-01 15:09:48,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 15:09:48,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 15:09:48,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 15:09:48,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 15:09:48,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 15:09:49,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 15:09:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 15:09:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-09-01 15:09:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 15:09:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:49,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 15:09:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 15:09:49,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034278049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 15:09:49,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 15:09:49,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-09-01 15:09:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295441032] [2023-09-01 15:09:49,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 15:09:49,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 15:09:49,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 15:09:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 15:09:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-09-01 15:09:50,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-09-01 15:09:50,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 2618 transitions, 72617 flow. Second operand has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 15:09:50,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 15:09:50,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-09-01 15:09:50,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15