./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --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-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:13:43,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:13:43,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:13:44,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:13:44,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:13:44,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:13:44,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:13:44,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:13:44,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:13:44,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:13:44,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:13:44,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:13:44,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:13:44,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:13:44,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:13:44,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:13:44,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:13:44,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:13:44,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:13:44,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:13:44,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:13:44,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:13:44,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:13:44,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:13:44,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:13:44,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:13:44,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:13:44,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:13:44,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:13:44,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:13:44,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:13:44,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:13:44,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:13:44,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:13:44,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:13:44,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:13:44,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:13:44,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:13:44,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:13:44,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:13:44,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:13:44,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:13:44,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:13:44,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:13:44,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:13:44,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:13:44,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:13:44,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:13:44,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:13:44,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:13:44,079 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:13:44,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:13:44,080 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:13:44,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:13:44,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:13:44,082 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:13:44,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:13:44,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:13:44,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:13:44,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:13:44,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:13:44,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:13:44,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:13:44,084 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:13:44,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:13:44,084 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:13:44,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:13:44,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:13:44,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:13:44,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:13:44,320 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:13:44,321 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:13:44,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-31 04:13:45,373 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:13:45,528 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:13:45,528 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-31 04:13:45,534 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2628107/67f2f044e0bd4cb8abda428abb9fcd1d/FLAGe423bc3b3 [2023-08-31 04:13:45,543 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f2628107/67f2f044e0bd4cb8abda428abb9fcd1d [2023-08-31 04:13:45,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:13:45,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:13:45,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:13:45,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:13:45,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:13:45,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be1f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45, skipping insertion in model container [2023-08-31 04:13:45,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:13:45,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:13:45,660 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-cond-2.wvr.c[2474,2487] [2023-08-31 04:13:45,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:13:45,671 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:13:45,683 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-cond-2.wvr.c[2474,2487] [2023-08-31 04:13:45,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:13:45,694 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:13:45,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45 WrapperNode [2023-08-31 04:13:45,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:13:45,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:13:45,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:13:45,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:13:45,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,728 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-08-31 04:13:45,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:13:45,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:13:45,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:13:45,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:13:45,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,766 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:13:45,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:13:45,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:13:45,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:13:45,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (1/1) ... [2023-08-31 04:13:45,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:13:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:45,794 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) [2023-08-31 04:13:45,804 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 [2023-08-31 04:13:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:13:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:13:45,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:13:45,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:13:45,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:13:45,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:13:45,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:13:45,825 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:13:45,931 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:13:45,935 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:13:46,149 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:13:46,154 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:13:46,155 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:13:46,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:13:46 BoogieIcfgContainer [2023-08-31 04:13:46,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:13:46,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:13:46,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:13:46,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:13:46,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:13:45" (1/3) ... [2023-08-31 04:13:46,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14860be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:13:46, skipping insertion in model container [2023-08-31 04:13:46,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:13:45" (2/3) ... [2023-08-31 04:13:46,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14860be7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:13:46, skipping insertion in model container [2023-08-31 04:13:46,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:13:46" (3/3) ... [2023-08-31 04:13:46,162 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-08-31 04:13:46,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:13:46,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:13:46,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:13:46,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:13:46,273 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:13:46,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 348 flow [2023-08-31 04:13:46,358 INFO L130 PetriNetUnfolder]: 15/164 cut-off events. [2023-08-31 04:13:46,361 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:13:46,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 164 events. 15/164 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-31 04:13:46,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 166 transitions, 348 flow [2023-08-31 04:13:46,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 156 transitions, 324 flow [2023-08-31 04:13:46,376 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:13:46,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 156 transitions, 324 flow [2023-08-31 04:13:46,391 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 156 transitions, 324 flow [2023-08-31 04:13:46,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 156 transitions, 324 flow [2023-08-31 04:13:46,417 INFO L130 PetriNetUnfolder]: 15/156 cut-off events. [2023-08-31 04:13:46,418 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:13:46,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 15/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-08-31 04:13:46,420 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-08-31 04:13:50,028 INFO L134 LiptonReduction]: Checked pairs total: 2696 [2023-08-31 04:13:50,028 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-08-31 04:13:50,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:13:50,042 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;@54081a04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:13:50,042 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:13:50,047 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:13:50,047 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:13:50,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:50,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:50,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:50,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -526169532, now seen corresponding path program 1 times [2023-08-31 04:13:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211099774] [2023-08-31 04:13:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211099774] [2023-08-31 04:13:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211099774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:50,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:13:50,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101952134] [2023-08-31 04:13:50,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:50,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:13:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:13:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:13:50,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 347 [2023-08-31 04:13:50,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:50,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 347 [2023-08-31 04:13:50,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:50,426 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2023-08-31 04:13:50,426 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:13:50,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-31 04:13:50,428 INFO L137 encePairwiseOnDemand]: 344/347 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:13:50,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:13:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:13:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:13:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-31 04:13:50,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43707973102785785 [2023-08-31 04:13:50,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-31 04:13:50,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-31 04:13:50,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:50,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-31 04:13:50,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,462 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 455 transitions. [2023-08-31 04:13:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:13:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:13:50,466 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:13:50,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, 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} [2023-08-31 04:13:50,469 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:13:50,470 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:13:50,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:50,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:50,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:13:50,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:50,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1480683613, now seen corresponding path program 1 times [2023-08-31 04:13:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:50,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759462445] [2023-08-31 04:13:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:50,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759462445] [2023-08-31 04:13:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759462445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:50,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476210832] [2023-08-31 04:13:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:50,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-31 04:13:50,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:50,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-31 04:13:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:50,889 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2023-08-31 04:13:50,890 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:13:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-31 04:13:50,893 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-31 04:13:50,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-31 04:13:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:13:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:13:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 730 transitions. [2023-08-31 04:13:50,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-08-31 04:13:50,897 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 730 transitions. [2023-08-31 04:13:50,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 730 transitions. [2023-08-31 04:13:50,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:50,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 730 transitions. [2023-08-31 04:13:50,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,903 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,903 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 730 transitions. [2023-08-31 04:13:50,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-31 04:13:50,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:13:50,904 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-31 04:13:50,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, 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=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-31 04:13:50,905 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-31 04:13:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-31 04:13:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:50,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:50,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:13:50,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:50,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash 182747709, now seen corresponding path program 2 times [2023-08-31 04:13:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449143235] [2023-08-31 04:13:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:51,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:51,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449143235] [2023-08-31 04:13:51,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449143235] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:51,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:51,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:51,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417632039] [2023-08-31 04:13:51,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:51,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:51,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:51,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:51,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:51,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-31 04:13:51,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:51,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-31 04:13:51,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:51,194 INFO L130 PetriNetUnfolder]: 109/198 cut-off events. [2023-08-31 04:13:51,194 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-31 04:13:51,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 606 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-08-31 04:13:51,196 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-31 04:13:51,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-08-31 04:13:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:13:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:13:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2023-08-31 04:13:51,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207492795389049 [2023-08-31 04:13:51,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2023-08-31 04:13:51,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2023-08-31 04:13:51,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:51,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2023-08-31 04:13:51,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,203 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 347.0) internal successors, (2429), 7 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,203 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 876 transitions. [2023-08-31 04:13:51,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-08-31 04:13:51,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 04:13:51,207 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-08-31 04:13:51,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-31 04:13:51,208 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-31 04:13:51,210 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-08-31 04:13:51,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:51,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:51,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:13:51,211 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:51,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1504917559, now seen corresponding path program 3 times [2023-08-31 04:13:51,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:51,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559160070] [2023-08-31 04:13:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:51,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:51,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:51,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559160070] [2023-08-31 04:13:51,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559160070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:51,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:51,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:51,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149733672] [2023-08-31 04:13:51,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:51,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:51,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:51,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-08-31 04:13:51,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:51,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-08-31 04:13:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:51,454 INFO L130 PetriNetUnfolder]: 119/214 cut-off events. [2023-08-31 04:13:51,456 INFO L131 PetriNetUnfolder]: For 343/343 co-relation queries the response was YES. [2023-08-31 04:13:51,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 686 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-08-31 04:13:51,458 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-31 04:13:51,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-08-31 04:13:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:13:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:13:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2023-08-31 04:13:51,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41844380403458215 [2023-08-31 04:13:51,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2023-08-31 04:13:51,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2023-08-31 04:13:51,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:51,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2023-08-31 04:13:51,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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) [2023-08-31 04:13:51,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,466 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,466 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 726 transitions. [2023-08-31 04:13:51,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-08-31 04:13:51,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-31 04:13:51,471 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-08-31 04:13:51,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-31 04:13:51,472 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-31 04:13:51,472 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-08-31 04:13:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:51,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:51,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 04:13:51,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:51,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1764589935, now seen corresponding path program 4 times [2023-08-31 04:13:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:51,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860696913] [2023-08-31 04:13:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860696913] [2023-08-31 04:13:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860696913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:51,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:51,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921234930] [2023-08-31 04:13:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:51,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:51,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 347 [2023-08-31 04:13:51,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:51,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 347 [2023-08-31 04:13:51,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:51,727 INFO L130 PetriNetUnfolder]: 115/210 cut-off events. [2023-08-31 04:13:51,727 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-31 04:13:51,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 663 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-08-31 04:13:51,728 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-31 04:13:51,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-08-31 04:13:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:13:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:13:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2023-08-31 04:13:51,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414985590778098 [2023-08-31 04:13:51,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2023-08-31 04:13:51,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2023-08-31 04:13:51,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:51,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2023-08-31 04:13:51,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,734 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 720 transitions. [2023-08-31 04:13:51,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-08-31 04:13:51,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 04:13:51,737 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-08-31 04:13:51,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-31 04:13:51,738 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-31 04:13:51,738 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-08-31 04:13:51,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:51,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:51,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 04:13:51,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:51,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:51,739 INFO L85 PathProgramCache]: Analyzing trace with hash -467573743, now seen corresponding path program 5 times [2023-08-31 04:13:51,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:51,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720703225] [2023-08-31 04:13:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720703225] [2023-08-31 04:13:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720703225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919091202] [2023-08-31 04:13:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:51,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-31 04:13:51,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:51,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:51,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-31 04:13:51,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:52,066 INFO L130 PetriNetUnfolder]: 116/213 cut-off events. [2023-08-31 04:13:52,066 INFO L131 PetriNetUnfolder]: For 617/617 co-relation queries the response was YES. [2023-08-31 04:13:52,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 695 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-08-31 04:13:52,067 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-08-31 04:13:52,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-08-31 04:13:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:13:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:13:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-31 04:13:52,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201729106628242 [2023-08-31 04:13:52,070 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-31 04:13:52,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-31 04:13:52,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:52,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-31 04:13:52,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,074 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,074 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 729 transitions. [2023-08-31 04:13:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-08-31 04:13:52,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-31 04:13:52,076 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-08-31 04:13:52,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-31 04:13:52,077 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-31 04:13:52,077 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-08-31 04:13:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:52,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 04:13:52,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:52,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:52,078 INFO L85 PathProgramCache]: Analyzing trace with hash -263674133, now seen corresponding path program 6 times [2023-08-31 04:13:52,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:52,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814258118] [2023-08-31 04:13:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:52,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:52,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814258118] [2023-08-31 04:13:52,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814258118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:13:52,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:13:52,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:13:52,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928963781] [2023-08-31 04:13:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:13:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:13:52,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:13:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:13:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 347 [2023-08-31 04:13:52,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:52,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 347 [2023-08-31 04:13:52,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:52,353 INFO L130 PetriNetUnfolder]: 115/206 cut-off events. [2023-08-31 04:13:52,353 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2023-08-31 04:13:52,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 627 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-08-31 04:13:52,355 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-08-31 04:13:52,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-08-31 04:13:52,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:13:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:13:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-08-31 04:13:52,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41786743515850144 [2023-08-31 04:13:52,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-08-31 04:13:52,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-08-31 04:13:52,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:52,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-08-31 04:13:52,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,364 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 347.0) internal successors, (2082), 6 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,364 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 725 transitions. [2023-08-31 04:13:52,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-08-31 04:13:52,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-31 04:13:52,368 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-08-31 04:13:52,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-31 04:13:52,369 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-31 04:13:52,370 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-08-31 04:13:52,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:52,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:52,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:52,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 04:13:52,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:52,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1171572305, now seen corresponding path program 1 times [2023-08-31 04:13:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:52,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24807096] [2023-08-31 04:13:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:52,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24807096] [2023-08-31 04:13:52,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24807096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:52,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431256671] [2023-08-31 04:13:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:52,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:52,774 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) [2023-08-31 04:13:52,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:13:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 04:13:52,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:53,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-31 04:13:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:53,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:53,554 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:13:53,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-08-31 04:13:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:53,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431256671] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:53,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:53,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-08-31 04:13:53,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287048451] [2023-08-31 04:13:53,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:53,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:13:53,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:13:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:13:53,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 347 [2023-08-31 04:13:53,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:53,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:53,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 347 [2023-08-31 04:13:53,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:54,403 INFO L130 PetriNetUnfolder]: 236/417 cut-off events. [2023-08-31 04:13:54,403 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2023-08-31 04:13:54,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1749 conditions, 417 events. 236/417 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1633 event pairs, 10 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1719. Up to 113 conditions per place. [2023-08-31 04:13:54,406 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 68 selfloop transitions, 53 changer transitions 4/125 dead transitions. [2023-08-31 04:13:54,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 125 transitions, 995 flow [2023-08-31 04:13:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 04:13:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 04:13:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1727 transitions. [2023-08-31 04:13:54,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38284194191975174 [2023-08-31 04:13:54,410 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1727 transitions. [2023-08-31 04:13:54,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1727 transitions. [2023-08-31 04:13:54,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:54,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1727 transitions. [2023-08-31 04:13:54,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 132.84615384615384) internal successors, (1727), 13 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:54,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:54,420 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:54,420 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 13 states and 1727 transitions. [2023-08-31 04:13:54,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 125 transitions, 995 flow [2023-08-31 04:13:54,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 125 transitions, 933 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-31 04:13:54,427 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 676 flow [2023-08-31 04:13:54,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=676, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2023-08-31 04:13:54,430 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2023-08-31 04:13:54,430 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 676 flow [2023-08-31 04:13:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 127.33333333333333) internal successors, (1528), 12 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:54,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:54,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:54,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:54,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:54,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:54,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1460222474, now seen corresponding path program 1 times [2023-08-31 04:13:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422192403] [2023-08-31 04:13:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:54,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:54,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422192403] [2023-08-31 04:13:54,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422192403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:54,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401986065] [2023-08-31 04:13:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:54,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:54,845 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) [2023-08-31 04:13:54,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:13:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:13:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:55,329 INFO L321 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-08-31 04:13:55,330 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 173 treesize of output 115 [2023-08-31 04:13:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:55,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:55,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:55,678 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 114 treesize of output 74 [2023-08-31 04:13:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:13:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401986065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:56,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2023-08-31 04:13:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114825842] [2023-08-31 04:13:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:13:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:13:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:13:56,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-08-31 04:13:56,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 676 flow. Second operand has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:56,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:56,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-08-31 04:13:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:57,596 INFO L130 PetriNetUnfolder]: 375/684 cut-off events. [2023-08-31 04:13:57,596 INFO L131 PetriNetUnfolder]: For 2569/2569 co-relation queries the response was YES. [2023-08-31 04:13:57,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 684 events. 375/684 cut-off events. For 2569/2569 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3166 event pairs, 37 based on Foata normal form. 5/631 useless extension candidates. Maximal degree in co-relation 3069. Up to 232 conditions per place. [2023-08-31 04:13:57,609 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 76 selfloop transitions, 56 changer transitions 56/188 dead transitions. [2023-08-31 04:13:57,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1790 flow [2023-08-31 04:13:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 04:13:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 04:13:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2576 transitions. [2023-08-31 04:13:57,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3374377783599686 [2023-08-31 04:13:57,616 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2576 transitions. [2023-08-31 04:13:57,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2576 transitions. [2023-08-31 04:13:57,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:57,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2576 transitions. [2023-08-31 04:13:57,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.0909090909091) internal successors, (2576), 22 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:57,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:57,628 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 347.0) internal successors, (7981), 23 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:57,628 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 676 flow. Second operand 22 states and 2576 transitions. [2023-08-31 04:13:57,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1790 flow [2023-08-31 04:13:57,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 188 transitions, 1618 flow, removed 68 selfloop flow, removed 2 redundant places. [2023-08-31 04:13:57,642 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 924 flow [2023-08-31 04:13:57,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=924, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-08-31 04:13:57,643 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-08-31 04:13:57,643 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 924 flow [2023-08-31 04:13:57,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.28571428571429) internal successors, (2379), 21 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:57,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:57,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:57,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:57,849 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 [2023-08-31 04:13:57,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:57,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -990791569, now seen corresponding path program 2 times [2023-08-31 04:13:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749285877] [2023-08-31 04:13:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:58,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:58,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749285877] [2023-08-31 04:13:58,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749285877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:58,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970955228] [2023-08-31 04:13:58,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:13:58,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:58,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:58,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:58,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:13:58,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:13:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 04:13:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:58,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-31 04:13:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:58,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:58,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:13:58,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 53 [2023-08-31 04:13:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970955228] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:58,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:58,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-08-31 04:13:58,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644628381] [2023-08-31 04:13:58,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:13:58,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:13:58,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:13:59,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-08-31 04:13:59,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:59,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:59,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-08-31 04:13:59,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:59,424 INFO L130 PetriNetUnfolder]: 323/577 cut-off events. [2023-08-31 04:13:59,425 INFO L131 PetriNetUnfolder]: For 2303/2303 co-relation queries the response was YES. [2023-08-31 04:13:59,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2739 conditions, 577 events. 323/577 cut-off events. For 2303/2303 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2495 event pairs, 5 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 2679. Up to 239 conditions per place. [2023-08-31 04:13:59,429 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 69 selfloop transitions, 74 changer transitions 4/147 dead transitions. [2023-08-31 04:13:59,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 1488 flow [2023-08-31 04:13:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 04:13:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 04:13:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1729 transitions. [2023-08-31 04:13:59,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38328530259365995 [2023-08-31 04:13:59,432 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1729 transitions. [2023-08-31 04:13:59,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1729 transitions. [2023-08-31 04:13:59,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:59,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1729 transitions. [2023-08-31 04:13:59,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.0) internal successors, (1729), 13 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:59,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:59,440 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 347.0) internal successors, (4858), 14 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:59,440 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 924 flow. Second operand 13 states and 1729 transitions. [2023-08-31 04:13:59,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 1488 flow [2023-08-31 04:13:59,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 147 transitions, 1364 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-08-31 04:13:59,452 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1211 flow [2023-08-31 04:13:59,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1211, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-08-31 04:13:59,453 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2023-08-31 04:13:59,453 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1211 flow [2023-08-31 04:13:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:59,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:59,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:59,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:59,659 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 [2023-08-31 04:13:59,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:59,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1059349345, now seen corresponding path program 3 times [2023-08-31 04:13:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918778642] [2023-08-31 04:13:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:59,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:13:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918778642] [2023-08-31 04:13:59,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918778642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885576872] [2023-08-31 04:13:59,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:13:59,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:59,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:59,863 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) [2023-08-31 04:13:59,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:13:59,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:13:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 04:13:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:00,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-31 04:14:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:00,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:00,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:00,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 128 [2023-08-31 04:14:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885576872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:00,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-08-31 04:14:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62034036] [2023-08-31 04:14:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:14:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:14:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:14:00,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 347 [2023-08-31 04:14:00,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1211 flow. Second operand has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:00,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:00,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 347 [2023-08-31 04:14:00,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:00,932 INFO L130 PetriNetUnfolder]: 389/752 cut-off events. [2023-08-31 04:14:00,932 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 04:14:00,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3652 conditions, 752 events. 389/752 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3828 event pairs, 4 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3548. Up to 216 conditions per place. [2023-08-31 04:14:00,937 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 82 selfloop transitions, 102 changer transitions 20/204 dead transitions. [2023-08-31 04:14:00,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 204 transitions, 2264 flow [2023-08-31 04:14:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:14:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:14:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2252 transitions. [2023-08-31 04:14:00,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817596202746228 [2023-08-31 04:14:00,942 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2252 transitions. [2023-08-31 04:14:00,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2252 transitions. [2023-08-31 04:14:00,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:00,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2252 transitions. [2023-08-31 04:14:00,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.47058823529412) internal successors, (2252), 17 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:00,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:00,956 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:00,956 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1211 flow. Second operand 17 states and 2252 transitions. [2023-08-31 04:14:00,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 204 transitions, 2264 flow [2023-08-31 04:14:00,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 204 transitions, 2120 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-31 04:14:00,977 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1713 flow [2023-08-31 04:14:00,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1713, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2023-08-31 04:14:00,978 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2023-08-31 04:14:00,978 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1713 flow [2023-08-31 04:14:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 128.21428571428572) internal successors, (1795), 14 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:00,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:00,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:00,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 04:14:01,184 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 [2023-08-31 04:14:01,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:01,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1724646899, now seen corresponding path program 4 times [2023-08-31 04:14:01,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:01,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57798696] [2023-08-31 04:14:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:01,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57798696] [2023-08-31 04:14:01,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57798696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:01,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295298152] [2023-08-31 04:14:01,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:14:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:01,487 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) [2023-08-31 04:14:01,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:14:01,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:14:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 04:14:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:01,586 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 [2023-08-31 04:14:01,608 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 [2023-08-31 04:14:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:14:01,666 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 [2023-08-31 04:14:01,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-31 04:14:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:01,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:02,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:02,061 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 52 treesize of output 41 [2023-08-31 04:14:02,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 326 [2023-08-31 04:14:02,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-31 04:14:02,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:02,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-08-31 04:14:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:02,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295298152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:02,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-31 04:14:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918097290] [2023-08-31 04:14:02,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:14:02,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:14:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2023-08-31 04:14:02,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-08-31 04:14:02,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1713 flow. Second operand has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:02,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:02,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-08-31 04:14:02,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:03,651 INFO L130 PetriNetUnfolder]: 476/919 cut-off events. [2023-08-31 04:14:03,651 INFO L131 PetriNetUnfolder]: For 5228/5228 co-relation queries the response was YES. [2023-08-31 04:14:03,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 919 events. 476/919 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4923 event pairs, 11 based on Foata normal form. 4/922 useless extension candidates. Maximal degree in co-relation 4900. Up to 213 conditions per place. [2023-08-31 04:14:03,657 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 97 selfloop transitions, 139 changer transitions 10/246 dead transitions. [2023-08-31 04:14:03,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 246 transitions, 3021 flow [2023-08-31 04:14:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:14:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:14:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2139 transitions. [2023-08-31 04:14:03,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424591738712776 [2023-08-31 04:14:03,662 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2139 transitions. [2023-08-31 04:14:03,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2139 transitions. [2023-08-31 04:14:03,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:03,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2139 transitions. [2023-08-31 04:14:03,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.83333333333333) internal successors, (2139), 18 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:03,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:03,671 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:03,671 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1713 flow. Second operand 18 states and 2139 transitions. [2023-08-31 04:14:03,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 246 transitions, 3021 flow [2023-08-31 04:14:03,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 246 transitions, 2776 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-08-31 04:14:03,733 INFO L231 Difference]: Finished difference. Result has 114 places, 181 transitions, 2454 flow [2023-08-31 04:14:03,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2454, PETRI_PLACES=114, PETRI_TRANSITIONS=181} [2023-08-31 04:14:03,733 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2023-08-31 04:14:03,733 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 181 transitions, 2454 flow [2023-08-31 04:14:03,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.66666666666667) internal successors, (2387), 21 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:03,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:03,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:03,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:03,939 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 [2023-08-31 04:14:03,939 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:03,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1294223865, now seen corresponding path program 5 times [2023-08-31 04:14:03,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:03,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813923889] [2023-08-31 04:14:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:04,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813923889] [2023-08-31 04:14:04,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813923889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:04,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984906031] [2023-08-31 04:14:04,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:14:04,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:04,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:04,145 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) [2023-08-31 04:14:04,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:14:04,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-31 04:14:04,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:04,234 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 [2023-08-31 04:14:04,253 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 [2023-08-31 04:14:04,273 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 [2023-08-31 04:14:04,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-31 04:14:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:04,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:06,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:06,939 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 55 treesize of output 44 [2023-08-31 04:14:06,957 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-31 04:14:06,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 81 [2023-08-31 04:14:06,963 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:14:06,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2023-08-31 04:14:06,971 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-31 04:14:06,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2023-08-31 04:14:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:07,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984906031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:07,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:07,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-08-31 04:14:07,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776071899] [2023-08-31 04:14:07,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:07,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:14:07,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:14:07,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=214, Unknown=4, NotChecked=0, Total=306 [2023-08-31 04:14:09,289 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] [2023-08-31 04:14:11,471 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] [2023-08-31 04:14:11,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 347 [2023-08-31 04:14:11,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 181 transitions, 2454 flow. Second operand has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:11,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:11,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 347 [2023-08-31 04:14:11,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:12,433 INFO L130 PetriNetUnfolder]: 528/1033 cut-off events. [2023-08-31 04:14:12,433 INFO L131 PetriNetUnfolder]: For 7788/7788 co-relation queries the response was YES. [2023-08-31 04:14:12,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 1033 events. 528/1033 cut-off events. For 7788/7788 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5706 event pairs, 73 based on Foata normal form. 6/1038 useless extension candidates. Maximal degree in co-relation 5733. Up to 792 conditions per place. [2023-08-31 04:14:12,440 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 174 selfloop transitions, 55 changer transitions 11/240 dead transitions. [2023-08-31 04:14:12,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 240 transitions, 3429 flow [2023-08-31 04:14:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 04:14:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 04:14:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1196 transitions. [2023-08-31 04:14:12,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287223823246878 [2023-08-31 04:14:12,444 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1196 transitions. [2023-08-31 04:14:12,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1196 transitions. [2023-08-31 04:14:12,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:12,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1196 transitions. [2023-08-31 04:14:12,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.66666666666667) internal successors, (1196), 12 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:12,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:12,453 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 347.0) internal successors, (4511), 13 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:12,454 INFO L175 Difference]: Start difference. First operand has 114 places, 181 transitions, 2454 flow. Second operand 12 states and 1196 transitions. [2023-08-31 04:14:12,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 240 transitions, 3429 flow [2023-08-31 04:14:12,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 240 transitions, 3362 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-31 04:14:12,489 INFO L231 Difference]: Finished difference. Result has 126 places, 201 transitions, 2896 flow [2023-08-31 04:14:12,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2896, PETRI_PLACES=126, PETRI_TRANSITIONS=201} [2023-08-31 04:14:12,490 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-08-31 04:14:12,490 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 201 transitions, 2896 flow [2023-08-31 04:14:12,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.94444444444444) internal successors, (1709), 18 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:12,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:12,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:12,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:12,698 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 [2023-08-31 04:14:12,698 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:12,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:12,698 INFO L85 PathProgramCache]: Analyzing trace with hash -469526207, now seen corresponding path program 2 times [2023-08-31 04:14:12,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:12,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509377927] [2023-08-31 04:14:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:12,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:12,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:12,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509377927] [2023-08-31 04:14:12,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509377927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:12,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298946850] [2023-08-31 04:14:12,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:14:12,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:12,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:12,814 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) [2023-08-31 04:14:12,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:14:12,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:12,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:12,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:13,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298946850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:13,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:13,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 04:14:13,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069594693] [2023-08-31 04:14:13,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:13,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 04:14:13,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 04:14:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-31 04:14:13,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:13,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 201 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:13,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:13,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:13,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:13,940 INFO L130 PetriNetUnfolder]: 605/1185 cut-off events. [2023-08-31 04:14:13,940 INFO L131 PetriNetUnfolder]: For 8838/8838 co-relation queries the response was YES. [2023-08-31 04:14:13,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 1185 events. 605/1185 cut-off events. For 8838/8838 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6884 event pairs, 70 based on Foata normal form. 28/1212 useless extension candidates. Maximal degree in co-relation 6674. Up to 357 conditions per place. [2023-08-31 04:14:13,950 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-08-31 04:14:13,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 302 transitions, 4219 flow [2023-08-31 04:14:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:14:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:14:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2425 transitions. [2023-08-31 04:14:13,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110866248516698 [2023-08-31 04:14:13,954 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2425 transitions. [2023-08-31 04:14:13,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2425 transitions. [2023-08-31 04:14:13,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:13,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2425 transitions. [2023-08-31 04:14:13,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.64705882352942) internal successors, (2425), 17 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:13,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:13,976 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:13,976 INFO L175 Difference]: Start difference. First operand has 126 places, 201 transitions, 2896 flow. Second operand 17 states and 2425 transitions. [2023-08-31 04:14:13,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 302 transitions, 4219 flow [2023-08-31 04:14:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 302 transitions, 4167 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-31 04:14:14,020 INFO L231 Difference]: Finished difference. Result has 146 places, 235 transitions, 3664 flow [2023-08-31 04:14:14,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3664, PETRI_PLACES=146, PETRI_TRANSITIONS=235} [2023-08-31 04:14:14,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2023-08-31 04:14:14,021 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 235 transitions, 3664 flow [2023-08-31 04:14:14,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:14,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:14,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:14,227 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 [2023-08-31 04:14:14,229 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:14,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1106126361, now seen corresponding path program 3 times [2023-08-31 04:14:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:14,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270889387] [2023-08-31 04:14:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:14,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:14,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270889387] [2023-08-31 04:14:14,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270889387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:14,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960988377] [2023-08-31 04:14:14,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:14:14,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:14,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:14,374 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) [2023-08-31 04:14:14,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:14:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:14:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:14,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:14,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:14,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960988377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:14,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:14:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850261875] [2023-08-31 04:14:14,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:14:14,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:14:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:14:14,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:14,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 235 transitions, 3664 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:14,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:14,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:14,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:15,482 INFO L130 PetriNetUnfolder]: 700/1350 cut-off events. [2023-08-31 04:14:15,482 INFO L131 PetriNetUnfolder]: For 12122/12122 co-relation queries the response was YES. [2023-08-31 04:14:15,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1350 events. 700/1350 cut-off events. For 12122/12122 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7922 event pairs, 124 based on Foata normal form. 12/1361 useless extension candidates. Maximal degree in co-relation 8400. Up to 625 conditions per place. [2023-08-31 04:14:15,493 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 211 selfloop transitions, 115 changer transitions 1/327 dead transitions. [2023-08-31 04:14:15,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 327 transitions, 5104 flow [2023-08-31 04:14:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 04:14:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 04:14:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2154 transitions. [2023-08-31 04:14:15,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138328530259366 [2023-08-31 04:14:15,497 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2154 transitions. [2023-08-31 04:14:15,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2154 transitions. [2023-08-31 04:14:15,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:15,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2154 transitions. [2023-08-31 04:14:15,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 143.6) internal successors, (2154), 15 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:15,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:15,504 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 347.0) internal successors, (5552), 16 states have internal predecessors, (5552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:15,504 INFO L175 Difference]: Start difference. First operand has 146 places, 235 transitions, 3664 flow. Second operand 15 states and 2154 transitions. [2023-08-31 04:14:15,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 327 transitions, 5104 flow [2023-08-31 04:14:15,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 327 transitions, 4961 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-08-31 04:14:15,571 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 4366 flow [2023-08-31 04:14:15,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4366, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2023-08-31 04:14:15,571 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-31 04:14:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 4366 flow [2023-08-31 04:14:15,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:15,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:15,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:15,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:15,778 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 [2023-08-31 04:14:15,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:15,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:15,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1138105375, now seen corresponding path program 4 times [2023-08-31 04:14:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900039401] [2023-08-31 04:14:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:15,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:15,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900039401] [2023-08-31 04:14:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900039401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132921527] [2023-08-31 04:14:15,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:14:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:15,940 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) [2023-08-31 04:14:15,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:14:16,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:14:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:16,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:16,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132921527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:16,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:16,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:14:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721598502] [2023-08-31 04:14:16,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:14:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:14:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:14:16,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:16,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 4366 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:16,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:16,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:16,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:17,067 INFO L130 PetriNetUnfolder]: 679/1327 cut-off events. [2023-08-31 04:14:17,067 INFO L131 PetriNetUnfolder]: For 14282/14282 co-relation queries the response was YES. [2023-08-31 04:14:17,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1327 events. 679/1327 cut-off events. For 14282/14282 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7894 event pairs, 120 based on Foata normal form. 28/1354 useless extension candidates. Maximal degree in co-relation 8784. Up to 629 conditions per place. [2023-08-31 04:14:17,079 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 214 selfloop transitions, 109 changer transitions 1/324 dead transitions. [2023-08-31 04:14:17,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 5258 flow [2023-08-31 04:14:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:14:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:14:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2428 transitions. [2023-08-31 04:14:17,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41159518562468217 [2023-08-31 04:14:17,083 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2428 transitions. [2023-08-31 04:14:17,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2428 transitions. [2023-08-31 04:14:17,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:17,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2428 transitions. [2023-08-31 04:14:17,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 142.8235294117647) internal successors, (2428), 17 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:17,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:17,091 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 347.0) internal successors, (6246), 18 states have internal predecessors, (6246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:17,091 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 4366 flow. Second operand 17 states and 2428 transitions. [2023-08-31 04:14:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 5258 flow [2023-08-31 04:14:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 324 transitions, 5142 flow, removed 35 selfloop flow, removed 3 redundant places. [2023-08-31 04:14:17,159 INFO L231 Difference]: Finished difference. Result has 177 places, 263 transitions, 4443 flow [2023-08-31 04:14:17,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4443, PETRI_PLACES=177, PETRI_TRANSITIONS=263} [2023-08-31 04:14:17,160 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 156 predicate places. [2023-08-31 04:14:17,160 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 263 transitions, 4443 flow [2023-08-31 04:14:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:17,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:17,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:17,367 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 [2023-08-31 04:14:17,368 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:17,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636203, now seen corresponding path program 5 times [2023-08-31 04:14:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:17,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244751471] [2023-08-31 04:14:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:17,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244751471] [2023-08-31 04:14:17,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244751471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669064654] [2023-08-31 04:14:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:14:17,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:17,497 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) [2023-08-31 04:14:17,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:14:17,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:17,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-31 04:14:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:17,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669064654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:17,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-31 04:14:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237242612] [2023-08-31 04:14:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 04:14:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:17,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 04:14:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-31 04:14:17,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:17,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 263 transitions, 4443 flow. Second operand has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:17,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:17,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:17,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:18,227 INFO L130 PetriNetUnfolder]: 763/1475 cut-off events. [2023-08-31 04:14:18,227 INFO L131 PetriNetUnfolder]: For 15441/15441 co-relation queries the response was YES. [2023-08-31 04:14:18,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10115 conditions, 1475 events. 763/1475 cut-off events. For 15441/15441 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8873 event pairs, 102 based on Foata normal form. 12/1486 useless extension candidates. Maximal degree in co-relation 9914. Up to 714 conditions per place. [2023-08-31 04:14:18,241 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 189 selfloop transitions, 133 changer transitions 0/322 dead transitions. [2023-08-31 04:14:18,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 5667 flow [2023-08-31 04:14:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 04:14:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 04:14:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1566 transitions. [2023-08-31 04:14:18,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102698454283469 [2023-08-31 04:14:18,243 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1566 transitions. [2023-08-31 04:14:18,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1566 transitions. [2023-08-31 04:14:18,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:18,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1566 transitions. [2023-08-31 04:14:18,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 142.36363636363637) internal successors, (1566), 11 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,248 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 347.0) internal successors, (4164), 12 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,248 INFO L175 Difference]: Start difference. First operand has 177 places, 263 transitions, 4443 flow. Second operand 11 states and 1566 transitions. [2023-08-31 04:14:18,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 5667 flow [2023-08-31 04:14:18,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 322 transitions, 5553 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-31 04:14:18,325 INFO L231 Difference]: Finished difference. Result has 183 places, 284 transitions, 5098 flow [2023-08-31 04:14:18,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5098, PETRI_PLACES=183, PETRI_TRANSITIONS=284} [2023-08-31 04:14:18,325 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2023-08-31 04:14:18,325 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 284 transitions, 5098 flow [2023-08-31 04:14:18,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.45454545454547) internal successors, (1523), 11 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:18,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:18,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:18,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:18,530 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 [2023-08-31 04:14:18,531 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:18,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1697963331, now seen corresponding path program 6 times [2023-08-31 04:14:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122871961] [2023-08-31 04:14:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:18,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122871961] [2023-08-31 04:14:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122871961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891705136] [2023-08-31 04:14:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:14:18,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:18,673 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) [2023-08-31 04:14:18,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:14:18,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:14:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:18,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:18,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891705136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:18,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:18,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:14:18,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867507494] [2023-08-31 04:14:18,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:18,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:14:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:14:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:14:19,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:19,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 284 transitions, 5098 flow. Second operand has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:19,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:19,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:19,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:20,129 INFO L130 PetriNetUnfolder]: 1108/2170 cut-off events. [2023-08-31 04:14:20,129 INFO L131 PetriNetUnfolder]: For 28091/28091 co-relation queries the response was YES. [2023-08-31 04:14:20,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15541 conditions, 2170 events. 1108/2170 cut-off events. For 28091/28091 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14201 event pairs, 45 based on Foata normal form. 16/2185 useless extension candidates. Maximal degree in co-relation 15275. Up to 545 conditions per place. [2023-08-31 04:14:20,151 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 248 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2023-08-31 04:14:20,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 493 transitions, 8920 flow [2023-08-31 04:14:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 04:14:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 04:14:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2726 transitions. [2023-08-31 04:14:20,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346883057788564 [2023-08-31 04:14:20,156 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2726 transitions. [2023-08-31 04:14:20,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2726 transitions. [2023-08-31 04:14:20,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:20,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2726 transitions. [2023-08-31 04:14:20,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.47368421052633) internal successors, (2726), 19 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:20,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:20,165 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:20,165 INFO L175 Difference]: Start difference. First operand has 183 places, 284 transitions, 5098 flow. Second operand 19 states and 2726 transitions. [2023-08-31 04:14:20,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 493 transitions, 8920 flow [2023-08-31 04:14:20,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 493 transitions, 8630 flow, removed 63 selfloop flow, removed 5 redundant places. [2023-08-31 04:14:20,344 INFO L231 Difference]: Finished difference. Result has 206 places, 383 transitions, 7499 flow [2023-08-31 04:14:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7499, PETRI_PLACES=206, PETRI_TRANSITIONS=383} [2023-08-31 04:14:20,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-08-31 04:14:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 383 transitions, 7499 flow [2023-08-31 04:14:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.07692307692307) internal successors, (1795), 13 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:20,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 04:14:20,550 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 [2023-08-31 04:14:20,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:20,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash 625542995, now seen corresponding path program 7 times [2023-08-31 04:14:20,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:20,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382197525] [2023-08-31 04:14:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:20,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382197525] [2023-08-31 04:14:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382197525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328748621] [2023-08-31 04:14:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:14:20,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:20,716 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) [2023-08-31 04:14:20,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:14:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328748621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:21,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:21,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:14:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938676656] [2023-08-31 04:14:21,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:21,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:14:21,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:14:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:14:21,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:21,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 383 transitions, 7499 flow. Second operand has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:21,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:21,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:21,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:22,158 INFO L130 PetriNetUnfolder]: 1126/2204 cut-off events. [2023-08-31 04:14:22,158 INFO L131 PetriNetUnfolder]: For 36261/36261 co-relation queries the response was YES. [2023-08-31 04:14:22,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17094 conditions, 2204 events. 1126/2204 cut-off events. For 36261/36261 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14381 event pairs, 55 based on Foata normal form. 12/2215 useless extension candidates. Maximal degree in co-relation 16860. Up to 597 conditions per place. [2023-08-31 04:14:22,176 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 225 selfloop transitions, 248 changer transitions 0/473 dead transitions. [2023-08-31 04:14:22,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 473 transitions, 9358 flow [2023-08-31 04:14:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 04:14:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 04:14:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2702 transitions. [2023-08-31 04:14:22,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409828606097376 [2023-08-31 04:14:22,179 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2702 transitions. [2023-08-31 04:14:22,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2702 transitions. [2023-08-31 04:14:22,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:22,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2702 transitions. [2023-08-31 04:14:22,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 142.21052631578948) internal successors, (2702), 19 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:22,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:22,186 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 347.0) internal successors, (6940), 20 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:22,186 INFO L175 Difference]: Start difference. First operand has 206 places, 383 transitions, 7499 flow. Second operand 19 states and 2702 transitions. [2023-08-31 04:14:22,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 473 transitions, 9358 flow [2023-08-31 04:14:22,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9004 flow, removed 90 selfloop flow, removed 4 redundant places. [2023-08-31 04:14:22,407 INFO L231 Difference]: Finished difference. Result has 226 places, 392 transitions, 8009 flow [2023-08-31 04:14:22,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7103, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8009, PETRI_PLACES=226, PETRI_TRANSITIONS=392} [2023-08-31 04:14:22,408 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-08-31 04:14:22,408 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 392 transitions, 8009 flow [2023-08-31 04:14:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 138.23076923076923) internal successors, (1797), 13 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:22,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:22,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:22,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-31 04:14:22,608 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 [2023-08-31 04:14:22,609 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:22,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1892416347, now seen corresponding path program 8 times [2023-08-31 04:14:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197333766] [2023-08-31 04:14:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:22,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197333766] [2023-08-31 04:14:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197333766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349850048] [2023-08-31 04:14:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:14:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:22,778 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) [2023-08-31 04:14:22,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:14:22,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:22,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:23,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349850048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:23,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:23,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:14:23,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797461737] [2023-08-31 04:14:23,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:23,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:14:23,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:23,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:14:23,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:14:23,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:23,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 392 transitions, 8009 flow. Second operand has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:23,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:23,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:23,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:24,139 INFO L130 PetriNetUnfolder]: 1189/2331 cut-off events. [2023-08-31 04:14:24,139 INFO L131 PetriNetUnfolder]: For 42784/42784 co-relation queries the response was YES. [2023-08-31 04:14:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18687 conditions, 2331 events. 1189/2331 cut-off events. For 42784/42784 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15406 event pairs, 216 based on Foata normal form. 24/2354 useless extension candidates. Maximal degree in co-relation 18376. Up to 1366 conditions per place. [2023-08-31 04:14:24,157 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 296 selfloop transitions, 186 changer transitions 2/484 dead transitions. [2023-08-31 04:14:24,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 484 transitions, 10028 flow [2023-08-31 04:14:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 04:14:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 04:14:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2282 transitions. [2023-08-31 04:14:24,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41102305475504325 [2023-08-31 04:14:24,159 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2282 transitions. [2023-08-31 04:14:24,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2282 transitions. [2023-08-31 04:14:24,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:24,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2282 transitions. [2023-08-31 04:14:24,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 142.625) internal successors, (2282), 16 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:24,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:24,165 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 347.0) internal successors, (5899), 17 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:24,165 INFO L175 Difference]: Start difference. First operand has 226 places, 392 transitions, 8009 flow. Second operand 16 states and 2282 transitions. [2023-08-31 04:14:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 484 transitions, 10028 flow [2023-08-31 04:14:24,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 484 transitions, 9795 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-31 04:14:24,356 INFO L231 Difference]: Finished difference. Result has 238 places, 421 transitions, 9012 flow [2023-08-31 04:14:24,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=7684, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9012, PETRI_PLACES=238, PETRI_TRANSITIONS=421} [2023-08-31 04:14:24,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 217 predicate places. [2023-08-31 04:14:24,357 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 421 transitions, 9012 flow [2023-08-31 04:14:24,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.33333333333334) internal successors, (1660), 12 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:24,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:24,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:24,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:24,562 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 [2023-08-31 04:14:24,562 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:24,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:24,563 INFO L85 PathProgramCache]: Analyzing trace with hash 158319213, now seen corresponding path program 9 times [2023-08-31 04:14:24,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849863638] [2023-08-31 04:14:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849863638] [2023-08-31 04:14:24,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849863638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197530436] [2023-08-31 04:14:24,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:14:24,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:24,697 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) [2023-08-31 04:14:24,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:14:24,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:14:24,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:24,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197530436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:25,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:25,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-31 04:14:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724637878] [2023-08-31 04:14:25,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 04:14:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 04:14:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-31 04:14:25,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:25,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 421 transitions, 9012 flow. Second operand has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:25,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:25,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:25,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:25,895 INFO L130 PetriNetUnfolder]: 1196/2314 cut-off events. [2023-08-31 04:14:25,895 INFO L131 PetriNetUnfolder]: For 46147/46147 co-relation queries the response was YES. [2023-08-31 04:14:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19529 conditions, 2314 events. 1196/2314 cut-off events. For 46147/46147 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 15011 event pairs, 216 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 19267. Up to 1376 conditions per place. [2023-08-31 04:14:25,914 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 291 selfloop transitions, 185 changer transitions 2/478 dead transitions. [2023-08-31 04:14:25,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 478 transitions, 10462 flow [2023-08-31 04:14:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 04:14:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 04:14:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2000 transitions. [2023-08-31 04:14:25,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169205434335115 [2023-08-31 04:14:25,918 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2000 transitions. [2023-08-31 04:14:25,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2000 transitions. [2023-08-31 04:14:25,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:25,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2000 transitions. [2023-08-31 04:14:25,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.85714285714286) internal successors, (2000), 14 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:25,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:25,923 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 347.0) internal successors, (5205), 15 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:25,923 INFO L175 Difference]: Start difference. First operand has 238 places, 421 transitions, 9012 flow. Second operand 14 states and 2000 transitions. [2023-08-31 04:14:25,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 478 transitions, 10462 flow [2023-08-31 04:14:26,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 478 transitions, 10314 flow, removed 53 selfloop flow, removed 6 redundant places. [2023-08-31 04:14:26,148 INFO L231 Difference]: Finished difference. Result has 246 places, 427 transitions, 9432 flow [2023-08-31 04:14:26,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9432, PETRI_PLACES=246, PETRI_TRANSITIONS=427} [2023-08-31 04:14:26,149 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-08-31 04:14:26,149 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 427 transitions, 9432 flow [2023-08-31 04:14:26,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.0) internal successors, (1656), 12 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:26,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:26,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:26,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:26,351 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 [2023-08-31 04:14:26,351 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:26,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -789546511, now seen corresponding path program 10 times [2023-08-31 04:14:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886280787] [2023-08-31 04:14:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:26,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886280787] [2023-08-31 04:14:26,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886280787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:26,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391058534] [2023-08-31 04:14:26,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:14:26,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:26,524 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) [2023-08-31 04:14:26,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:14:26,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:14:26,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-31 04:14:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391058534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:26,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:26,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-31 04:14:26,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340817839] [2023-08-31 04:14:26,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 04:14:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 04:14:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-31 04:14:26,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:26,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 427 transitions, 9432 flow. Second operand has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:26,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:26,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:26,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:28,003 INFO L130 PetriNetUnfolder]: 1350/2640 cut-off events. [2023-08-31 04:14:28,003 INFO L131 PetriNetUnfolder]: For 54961/54961 co-relation queries the response was YES. [2023-08-31 04:14:28,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22726 conditions, 2640 events. 1350/2640 cut-off events. For 54961/54961 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17644 event pairs, 35 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 22569. Up to 647 conditions per place. [2023-08-31 04:14:28,024 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 309 selfloop transitions, 253 changer transitions 0/562 dead transitions. [2023-08-31 04:14:28,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 562 transitions, 12551 flow [2023-08-31 04:14:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:14:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:14:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2577 transitions. [2023-08-31 04:14:28,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125840537944284 [2023-08-31 04:14:28,028 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2577 transitions. [2023-08-31 04:14:28,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2577 transitions. [2023-08-31 04:14:28,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:28,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2577 transitions. [2023-08-31 04:14:28,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 143.16666666666666) internal successors, (2577), 18 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:28,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:28,034 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:28,034 INFO L175 Difference]: Start difference. First operand has 246 places, 427 transitions, 9432 flow. Second operand 18 states and 2577 transitions. [2023-08-31 04:14:28,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 562 transitions, 12551 flow [2023-08-31 04:14:28,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 562 transitions, 12203 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-31 04:14:28,291 INFO L231 Difference]: Finished difference. Result has 253 places, 444 transitions, 10131 flow [2023-08-31 04:14:28,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10131, PETRI_PLACES=253, PETRI_TRANSITIONS=444} [2023-08-31 04:14:28,292 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2023-08-31 04:14:28,292 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 444 transitions, 10131 flow [2023-08-31 04:14:28,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:28,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:28,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:28,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:28,492 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 [2023-08-31 04:14:28,493 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:28,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash -212875034, now seen corresponding path program 1 times [2023-08-31 04:14:28,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:28,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075658970] [2023-08-31 04:14:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:28,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075658970] [2023-08-31 04:14:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075658970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931905053] [2023-08-31 04:14:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:28,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:28,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:28,602 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) [2023-08-31 04:14:28,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:14:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 04:14:28,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:28,711 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 [2023-08-31 04:14:28,744 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 [2023-08-31 04:14:28,768 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 [2023-08-31 04:14:28,975 INFO L321 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2023-08-31 04:14:28,975 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 206 treesize of output 151 [2023-08-31 04:14:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:29,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:29,249 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* 4 .cse0) c_~f~0.offset))) (<= c_~size~0 .cse0))))) is different from false [2023-08-31 04:14:29,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:29,304 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 140 treesize of output 92 [2023-08-31 04:14:29,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:29,317 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 254 [2023-08-31 04:14:29,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:29,336 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 194 [2023-08-31 04:14:29,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:29,368 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-08-31 04:14:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:29,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931905053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:29,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:29,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-31 04:14:29,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013922911] [2023-08-31 04:14:29,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:14:29,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:14:29,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-08-31 04:14:29,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-08-31 04:14:29,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 444 transitions, 10131 flow. Second operand has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:29,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:29,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-08-31 04:14:29,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:31,285 INFO L130 PetriNetUnfolder]: 1673/3401 cut-off events. [2023-08-31 04:14:31,285 INFO L131 PetriNetUnfolder]: For 83073/83073 co-relation queries the response was YES. [2023-08-31 04:14:31,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28798 conditions, 3401 events. 1673/3401 cut-off events. For 83073/83073 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24940 event pairs, 172 based on Foata normal form. 148/3548 useless extension candidates. Maximal degree in co-relation 28642. Up to 1386 conditions per place. [2023-08-31 04:14:31,309 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 395 selfloop transitions, 133 changer transitions 161/689 dead transitions. [2023-08-31 04:14:31,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 689 transitions, 15671 flow [2023-08-31 04:14:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:14:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:14:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1836 transitions. [2023-08-31 04:14:31,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23004636010524998 [2023-08-31 04:14:31,315 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1836 transitions. [2023-08-31 04:14:31,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1836 transitions. [2023-08-31 04:14:31,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:31,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1836 transitions. [2023-08-31 04:14:31,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.82608695652173) internal successors, (1836), 23 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:31,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:31,321 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:31,321 INFO L175 Difference]: Start difference. First operand has 253 places, 444 transitions, 10131 flow. Second operand 23 states and 1836 transitions. [2023-08-31 04:14:31,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 689 transitions, 15671 flow [2023-08-31 04:14:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 14983 flow, removed 100 selfloop flow, removed 9 redundant places. [2023-08-31 04:14:31,725 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 9940 flow [2023-08-31 04:14:31,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9940, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2023-08-31 04:14:31,726 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-08-31 04:14:31,726 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 9940 flow [2023-08-31 04:14:31,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.57894736842105) internal successors, (1436), 19 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:31,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:31,727 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:31,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:31,932 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 [2023-08-31 04:14:31,932 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:31,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1127277119, now seen corresponding path program 6 times [2023-08-31 04:14:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:31,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888597718] [2023-08-31 04:14:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:32,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888597718] [2023-08-31 04:14:32,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888597718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:32,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468897178] [2023-08-31 04:14:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:14:32,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:32,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:32,042 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) [2023-08-31 04:14:32,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:14:32,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:14:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:14:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:14:32,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-31 04:14:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:32,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:32,668 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 128 [2023-08-31 04:14:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:32,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468897178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:32,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:32,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-08-31 04:14:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140692323] [2023-08-31 04:14:32,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:14:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:14:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:14:34,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 347 [2023-08-31 04:14:34,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 9940 flow. Second operand has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:34,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:34,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 347 [2023-08-31 04:14:34,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:35,706 INFO L130 PetriNetUnfolder]: 1622/3315 cut-off events. [2023-08-31 04:14:35,706 INFO L131 PetriNetUnfolder]: For 73385/73385 co-relation queries the response was YES. [2023-08-31 04:14:35,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28852 conditions, 3315 events. 1622/3315 cut-off events. For 73385/73385 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 24234 event pairs, 87 based on Foata normal form. 53/3367 useless extension candidates. Maximal degree in co-relation 28683. Up to 1119 conditions per place. [2023-08-31 04:14:35,731 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 393 selfloop transitions, 107 changer transitions 166/666 dead transitions. [2023-08-31 04:14:35,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 666 transitions, 15425 flow [2023-08-31 04:14:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:14:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:14:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3360 transitions. [2023-08-31 04:14:35,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345821325648415 [2023-08-31 04:14:35,735 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3360 transitions. [2023-08-31 04:14:35,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3360 transitions. [2023-08-31 04:14:35,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:35,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3360 transitions. [2023-08-31 04:14:35,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 120.0) internal successors, (3360), 28 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:35,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:35,743 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:35,743 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 9940 flow. Second operand 28 states and 3360 transitions. [2023-08-31 04:14:35,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 666 transitions, 15425 flow [2023-08-31 04:14:36,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 666 transitions, 15053 flow, removed 167 selfloop flow, removed 11 redundant places. [2023-08-31 04:14:36,139 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 8984 flow [2023-08-31 04:14:36,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9583, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8984, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2023-08-31 04:14:36,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-08-31 04:14:36,140 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 8984 flow [2023-08-31 04:14:36,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.19047619047619) internal successors, (2461), 21 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:36,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:36,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:36,345 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 [2023-08-31 04:14:36,346 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:36,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:36,346 INFO L85 PathProgramCache]: Analyzing trace with hash 289751092, now seen corresponding path program 11 times [2023-08-31 04:14:36,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:36,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515560812] [2023-08-31 04:14:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:36,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515560812] [2023-08-31 04:14:36,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515560812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513591057] [2023-08-31 04:14:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:14:36,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:36,512 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) [2023-08-31 04:14:36,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:14:36,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 04:14:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:36,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:36,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513591057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:36,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:36,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 04:14:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34186702] [2023-08-31 04:14:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:14:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:14:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:14:37,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:14:37,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 8984 flow. Second operand has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:37,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:37,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:14:37,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:38,111 INFO L130 PetriNetUnfolder]: 1235/2475 cut-off events. [2023-08-31 04:14:38,111 INFO L131 PetriNetUnfolder]: For 53898/53898 co-relation queries the response was YES. [2023-08-31 04:14:38,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 2475 events. 1235/2475 cut-off events. For 53898/53898 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16526 event pairs, 183 based on Foata normal form. 16/2490 useless extension candidates. Maximal degree in co-relation 21220. Up to 927 conditions per place. [2023-08-31 04:14:38,130 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 267 selfloop transitions, 195 changer transitions 1/463 dead transitions. [2023-08-31 04:14:38,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 463 transitions, 10351 flow [2023-08-31 04:14:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:14:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:14:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2549 transitions. [2023-08-31 04:14:38,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40810118475824525 [2023-08-31 04:14:38,134 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2549 transitions. [2023-08-31 04:14:38,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2549 transitions. [2023-08-31 04:14:38,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:38,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2549 transitions. [2023-08-31 04:14:38,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 141.61111111111111) internal successors, (2549), 18 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:38,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:38,139 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 347.0) internal successors, (6593), 19 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:38,139 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 8984 flow. Second operand 18 states and 2549 transitions. [2023-08-31 04:14:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 463 transitions, 10351 flow [2023-08-31 04:14:38,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 463 transitions, 9611 flow, removed 125 selfloop flow, removed 23 redundant places. [2023-08-31 04:14:38,356 INFO L231 Difference]: Finished difference. Result has 265 places, 405 transitions, 8805 flow [2023-08-31 04:14:38,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8805, PETRI_PLACES=265, PETRI_TRANSITIONS=405} [2023-08-31 04:14:38,357 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-08-31 04:14:38,357 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 405 transitions, 8805 flow [2023-08-31 04:14:38,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 138.14285714285714) internal successors, (1934), 14 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:38,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:38,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:38,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 04:14:38,558 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 [2023-08-31 04:14:38,558 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:38,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:38,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1623000778, now seen corresponding path program 2 times [2023-08-31 04:14:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:38,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608361019] [2023-08-31 04:14:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:38,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:39,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608361019] [2023-08-31 04:14:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608361019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:39,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131497911] [2023-08-31 04:14:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:14:39,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:39,203 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) [2023-08-31 04:14:39,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:14:39,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:14:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:39,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 04:14:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:39,321 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 15 treesize of output 11 [2023-08-31 04:14:39,348 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 [2023-08-31 04:14:39,413 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 [2023-08-31 04:14:39,724 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2023-08-31 04:14:39,726 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2023-08-31 04:14:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:39,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:40,477 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (~x2~0 Int) (v_ArrVal_729 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_729) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (= (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* .cse0 4)))) (< .cse0 0))))) is different from false [2023-08-31 04:14:40,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:40,569 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 140 treesize of output 92 [2023-08-31 04:14:40,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:40,584 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-08-31 04:14:40,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:40,615 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 116 [2023-08-31 04:14:40,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:40,640 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 113 [2023-08-31 04:14:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:41,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131497911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:41,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:41,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-31 04:14:41,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761316262] [2023-08-31 04:14:41,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:14:41,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:41,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:14:41,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=835, Unknown=2, NotChecked=60, Total=1056 [2023-08-31 04:14:41,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-08-31 04:14:41,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 405 transitions, 8805 flow. Second operand has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:41,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:41,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-08-31 04:14:41,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:48,003 INFO L130 PetriNetUnfolder]: 1541/3100 cut-off events. [2023-08-31 04:14:48,003 INFO L131 PetriNetUnfolder]: For 57246/57246 co-relation queries the response was YES. [2023-08-31 04:14:48,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3100 events. 1541/3100 cut-off events. For 57246/57246 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21833 event pairs, 129 based on Foata normal form. 39/3138 useless extension candidates. Maximal degree in co-relation 24967. Up to 1819 conditions per place. [2023-08-31 04:14:48,028 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 430 selfloop transitions, 101 changer transitions 111/642 dead transitions. [2023-08-31 04:14:48,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 642 transitions, 13257 flow [2023-08-31 04:14:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:14:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:14:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2525 transitions. [2023-08-31 04:14:48,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2273955331412104 [2023-08-31 04:14:48,031 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2525 transitions. [2023-08-31 04:14:48,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2525 transitions. [2023-08-31 04:14:48,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:48,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2525 transitions. [2023-08-31 04:14:48,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.90625) internal successors, (2525), 32 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:48,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:48,039 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:48,039 INFO L175 Difference]: Start difference. First operand has 265 places, 405 transitions, 8805 flow. Second operand 32 states and 2525 transitions. [2023-08-31 04:14:48,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 642 transitions, 13257 flow [2023-08-31 04:14:48,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 642 transitions, 12846 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-31 04:14:48,340 INFO L231 Difference]: Finished difference. Result has 309 places, 442 transitions, 9681 flow [2023-08-31 04:14:48,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9681, PETRI_PLACES=309, PETRI_TRANSITIONS=442} [2023-08-31 04:14:48,341 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2023-08-31 04:14:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 442 transitions, 9681 flow [2023-08-31 04:14:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 74.51515151515152) internal successors, (2459), 33 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:48,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:48,341 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:48,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:48,542 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 [2023-08-31 04:14:48,542 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:48,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1456848755, now seen corresponding path program 7 times [2023-08-31 04:14:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282815171] [2023-08-31 04:14:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:48,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:48,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282815171] [2023-08-31 04:14:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282815171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:48,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513791835] [2023-08-31 04:14:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:14:48,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:48,747 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) [2023-08-31 04:14:48,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:14:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:48,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:14:48,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:49,038 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:14:49,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-31 04:14:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:49,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:49,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:49,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 56 [2023-08-31 04:14:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513791835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:49,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-31 04:14:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320969983] [2023-08-31 04:14:49,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:49,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:14:49,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:14:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2023-08-31 04:14:50,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 347 [2023-08-31 04:14:50,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 442 transitions, 9681 flow. Second operand has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:50,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:50,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 347 [2023-08-31 04:14:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:14:52,822 INFO L130 PetriNetUnfolder]: 1470/2904 cut-off events. [2023-08-31 04:14:52,822 INFO L131 PetriNetUnfolder]: For 59240/59240 co-relation queries the response was YES. [2023-08-31 04:14:52,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24732 conditions, 2904 events. 1470/2904 cut-off events. For 59240/59240 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19671 event pairs, 138 based on Foata normal form. 19/2922 useless extension candidates. Maximal degree in co-relation 24555. Up to 2072 conditions per place. [2023-08-31 04:14:52,846 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 407 selfloop transitions, 112 changer transitions 71/590 dead transitions. [2023-08-31 04:14:52,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 590 transitions, 12513 flow [2023-08-31 04:14:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:14:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:14:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3889 transitions. [2023-08-31 04:14:52,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502341498559078 [2023-08-31 04:14:52,850 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3889 transitions. [2023-08-31 04:14:52,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3889 transitions. [2023-08-31 04:14:52,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:14:52,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3889 transitions. [2023-08-31 04:14:52,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 121.53125) internal successors, (3889), 32 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:52,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:52,863 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:52,863 INFO L175 Difference]: Start difference. First operand has 309 places, 442 transitions, 9681 flow. Second operand 32 states and 3889 transitions. [2023-08-31 04:14:52,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 590 transitions, 12513 flow [2023-08-31 04:14:53,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 590 transitions, 12163 flow, removed 155 selfloop flow, removed 16 redundant places. [2023-08-31 04:14:53,111 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 9876 flow [2023-08-31 04:14:53,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9876, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2023-08-31 04:14:53,111 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2023-08-31 04:14:53,111 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 9876 flow [2023-08-31 04:14:53,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 118.125) internal successors, (2835), 24 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:53,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:14:53,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:14:53,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 04:14:53,312 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 [2023-08-31 04:14:53,312 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:14:53,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:14:53,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1057721665, now seen corresponding path program 3 times [2023-08-31 04:14:53,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:14:53,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834638975] [2023-08-31 04:14:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:14:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:14:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:14:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:14:54,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:14:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834638975] [2023-08-31 04:14:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834638975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:14:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113677805] [2023-08-31 04:14:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:14:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:14:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:14:54,293 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) [2023-08-31 04:14:54,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 04:14:54,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:14:54,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:14:54,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:14:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:14:54,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:14:54,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:14:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:14:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:14:55,129 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:14:55,130 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 35 treesize of output 74 [2023-08-31 04:14:55,187 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:14:55,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:14:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:14:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113677805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:14:55,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:14:55,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:14:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391535413] [2023-08-31 04:14:55,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:14:55,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:14:55,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:14:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:14:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:14:58,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-31 04:14:58,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 9876 flow. Second operand has 29 states, 29 states have (on average 115.79310344827586) internal successors, (3358), 29 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:14:58,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:14:58,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-31 04:14:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:01,263 INFO L130 PetriNetUnfolder]: 1576/3098 cut-off events. [2023-08-31 04:15:01,264 INFO L131 PetriNetUnfolder]: For 64706/64706 co-relation queries the response was YES. [2023-08-31 04:15:01,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26742 conditions, 3098 events. 1576/3098 cut-off events. For 64706/64706 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21166 event pairs, 157 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 26566. Up to 2427 conditions per place. [2023-08-31 04:15:01,292 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 429 selfloop transitions, 185 changer transitions 23/637 dead transitions. [2023-08-31 04:15:01,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 637 transitions, 13657 flow [2023-08-31 04:15:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 04:15:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 04:15:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4188 transitions. [2023-08-31 04:15:01,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448332647179909 [2023-08-31 04:15:01,296 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4188 transitions. [2023-08-31 04:15:01,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4188 transitions. [2023-08-31 04:15:01,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:01,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4188 transitions. [2023-08-31 04:15:01,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 119.65714285714286) internal successors, (4188), 35 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:01,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:01,305 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:01,305 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 9876 flow. Second operand 35 states and 4188 transitions. [2023-08-31 04:15:01,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 637 transitions, 13657 flow [2023-08-31 04:15:01,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 637 transitions, 13228 flow, removed 63 selfloop flow, removed 18 redundant places. [2023-08-31 04:15:01,615 INFO L231 Difference]: Finished difference. Result has 336 places, 528 transitions, 11946 flow [2023-08-31 04:15:01,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11946, PETRI_PLACES=336, PETRI_TRANSITIONS=528} [2023-08-31 04:15:01,616 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-08-31 04:15:01,616 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 528 transitions, 11946 flow [2023-08-31 04:15:01,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 115.79310344827586) internal successors, (3358), 29 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:01,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:01,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:01,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:01,822 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 [2023-08-31 04:15:01,822 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:01,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 457305767, now seen corresponding path program 4 times [2023-08-31 04:15:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781569658] [2023-08-31 04:15:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781569658] [2023-08-31 04:15:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781569658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041964800] [2023-08-31 04:15:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:15:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:02,919 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) [2023-08-31 04:15:02,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 04:15:03,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:15:03,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:15:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:03,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:03,300 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 160 treesize of output 118 [2023-08-31 04:15:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:03,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:03,934 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:15:03,934 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 35 treesize of output 74 [2023-08-31 04:15:03,991 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:15:03,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:15:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:04,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041964800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:04,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:04,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:15:04,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344359767] [2023-08-31 04:15:04,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:15:04,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:15:04,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:15:06,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:15:06,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 528 transitions, 11946 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:06,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:06,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:15:06,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:08,809 INFO L130 PetriNetUnfolder]: 1596/3144 cut-off events. [2023-08-31 04:15:08,809 INFO L131 PetriNetUnfolder]: For 66974/66974 co-relation queries the response was YES. [2023-08-31 04:15:08,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27955 conditions, 3144 events. 1596/3144 cut-off events. For 66974/66974 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21667 event pairs, 181 based on Foata normal form. 6/3148 useless extension candidates. Maximal degree in co-relation 27763. Up to 2479 conditions per place. [2023-08-31 04:15:08,837 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 446 selfloop transitions, 170 changer transitions 15/631 dead transitions. [2023-08-31 04:15:08,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 631 transitions, 14015 flow [2023-08-31 04:15:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:15:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:15:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3338 transitions. [2023-08-31 04:15:08,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34355701934952654 [2023-08-31 04:15:08,840 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3338 transitions. [2023-08-31 04:15:08,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3338 transitions. [2023-08-31 04:15:08,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:08,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3338 transitions. [2023-08-31 04:15:08,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 119.21428571428571) internal successors, (3338), 28 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:08,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:08,847 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:08,847 INFO L175 Difference]: Start difference. First operand has 336 places, 528 transitions, 11946 flow. Second operand 28 states and 3338 transitions. [2023-08-31 04:15:08,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 631 transitions, 14015 flow [2023-08-31 04:15:09,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 631 transitions, 13624 flow, removed 155 selfloop flow, removed 11 redundant places. [2023-08-31 04:15:09,197 INFO L231 Difference]: Finished difference. Result has 358 places, 545 transitions, 12428 flow [2023-08-31 04:15:09,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12428, PETRI_PLACES=358, PETRI_TRANSITIONS=545} [2023-08-31 04:15:09,198 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 337 predicate places. [2023-08-31 04:15:09,198 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 545 transitions, 12428 flow [2023-08-31 04:15:09,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:09,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:09,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:09,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:09,400 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 [2023-08-31 04:15:09,400 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:09,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1593429793, now seen corresponding path program 5 times [2023-08-31 04:15:09,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:09,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621293182] [2023-08-31 04:15:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:10,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:10,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621293182] [2023-08-31 04:15:10,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621293182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:10,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665534720] [2023-08-31 04:15:10,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:15:10,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:10,207 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) [2023-08-31 04:15:10,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 04:15:10,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:15:10,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:15:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:15:10,623 INFO L321 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-08-31 04:15:10,623 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 29 treesize of output 33 [2023-08-31 04:15:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:10,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:11,247 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:15:11,248 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 35 treesize of output 74 [2023-08-31 04:15:11,312 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:15:11,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:15:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665534720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:11,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-08-31 04:15:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332860368] [2023-08-31 04:15:11,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:11,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 04:15:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 04:15:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-08-31 04:15:15,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 347 [2023-08-31 04:15:15,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 545 transitions, 12428 flow. Second operand has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:15,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:15,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 347 [2023-08-31 04:15:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:18,577 INFO L130 PetriNetUnfolder]: 1625/3195 cut-off events. [2023-08-31 04:15:18,577 INFO L131 PetriNetUnfolder]: For 70156/70156 co-relation queries the response was YES. [2023-08-31 04:15:18,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28688 conditions, 3195 events. 1625/3195 cut-off events. For 70156/70156 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22036 event pairs, 189 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 28489. Up to 2545 conditions per place. [2023-08-31 04:15:18,610 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 455 selfloop transitions, 178 changer transitions 21/654 dead transitions. [2023-08-31 04:15:18,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 654 transitions, 14454 flow [2023-08-31 04:15:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:15:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:15:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3780 transitions. [2023-08-31 04:15:18,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404178674351585 [2023-08-31 04:15:18,614 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3780 transitions. [2023-08-31 04:15:18,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3780 transitions. [2023-08-31 04:15:18,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:18,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3780 transitions. [2023-08-31 04:15:18,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 118.125) internal successors, (3780), 32 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:18,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:18,622 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:18,622 INFO L175 Difference]: Start difference. First operand has 358 places, 545 transitions, 12428 flow. Second operand 32 states and 3780 transitions. [2023-08-31 04:15:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 654 transitions, 14454 flow [2023-08-31 04:15:19,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 654 transitions, 14286 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-31 04:15:19,067 INFO L231 Difference]: Finished difference. Result has 382 places, 554 transitions, 12870 flow [2023-08-31 04:15:19,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12870, PETRI_PLACES=382, PETRI_TRANSITIONS=554} [2023-08-31 04:15:19,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-08-31 04:15:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 554 transitions, 12870 flow [2023-08-31 04:15:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 113.73333333333333) internal successors, (3412), 30 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:19,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-31 04:15:19,273 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 [2023-08-31 04:15:19,273 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:19,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash -571252333, now seen corresponding path program 6 times [2023-08-31 04:15:19,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:19,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472962427] [2023-08-31 04:15:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:19,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:20,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472962427] [2023-08-31 04:15:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472962427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:20,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601359134] [2023-08-31 04:15:20,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:15:20,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:20,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:20,197 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) [2023-08-31 04:15:20,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 04:15:20,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:15:20,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:15:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:20,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:20,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:15:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:15:20,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:21,182 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:15:21,182 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 35 treesize of output 74 [2023-08-31 04:15:21,250 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:15:21,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:15:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601359134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:21,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:21,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:15:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805480643] [2023-08-31 04:15:21,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:21,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:15:21,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:15:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:15:24,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:15:24,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 554 transitions, 12870 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:24,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:24,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:15:24,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:27,936 INFO L130 PetriNetUnfolder]: 1722/3362 cut-off events. [2023-08-31 04:15:27,936 INFO L131 PetriNetUnfolder]: For 77736/77736 co-relation queries the response was YES. [2023-08-31 04:15:27,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 3362 events. 1722/3362 cut-off events. For 77736/77736 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23201 event pairs, 215 based on Foata normal form. 5/3366 useless extension candidates. Maximal degree in co-relation 30673. Up to 2866 conditions per place. [2023-08-31 04:15:27,968 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 517 selfloop transitions, 145 changer transitions 21/683 dead transitions. [2023-08-31 04:15:27,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 683 transitions, 15750 flow [2023-08-31 04:15:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 04:15:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 04:15:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4144 transitions. [2023-08-31 04:15:27,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34121037463976944 [2023-08-31 04:15:27,972 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4144 transitions. [2023-08-31 04:15:27,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4144 transitions. [2023-08-31 04:15:27,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:27,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4144 transitions. [2023-08-31 04:15:27,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.4) internal successors, (4144), 35 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,982 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:27,982 INFO L175 Difference]: Start difference. First operand has 382 places, 554 transitions, 12870 flow. Second operand 35 states and 4144 transitions. [2023-08-31 04:15:27,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 683 transitions, 15750 flow [2023-08-31 04:15:28,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 683 transitions, 15399 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-08-31 04:15:28,401 INFO L231 Difference]: Finished difference. Result has 397 places, 594 transitions, 13946 flow [2023-08-31 04:15:28,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=12541, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13946, PETRI_PLACES=397, PETRI_TRANSITIONS=594} [2023-08-31 04:15:28,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 376 predicate places. [2023-08-31 04:15:28,402 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 594 transitions, 13946 flow [2023-08-31 04:15:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:28,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:28,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:28,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:28,607 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 [2023-08-31 04:15:28,607 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:28,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1478888581, now seen corresponding path program 7 times [2023-08-31 04:15:28,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:28,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409892774] [2023-08-31 04:15:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:28,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:29,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409892774] [2023-08-31 04:15:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409892774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:29,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139021044] [2023-08-31 04:15:29,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:15:29,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:29,571 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) [2023-08-31 04:15:29,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 04:15:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:15:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:29,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:29,919 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 86 treesize of output 74 [2023-08-31 04:15:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:30,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:30,597 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:15:30,597 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 35 treesize of output 74 [2023-08-31 04:15:30,663 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:15:30,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:15:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139021044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:30,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:30,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 27 [2023-08-31 04:15:30,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974411822] [2023-08-31 04:15:30,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:15:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:30,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:15:30,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:15:33,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 347 [2023-08-31 04:15:33,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 594 transitions, 13946 flow. Second operand has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:33,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:33,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 347 [2023-08-31 04:15:33,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:37,026 INFO L130 PetriNetUnfolder]: 1781/3477 cut-off events. [2023-08-31 04:15:37,026 INFO L131 PetriNetUnfolder]: For 82653/82653 co-relation queries the response was YES. [2023-08-31 04:15:37,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32398 conditions, 3477 events. 1781/3477 cut-off events. For 82653/82653 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 24306 event pairs, 198 based on Foata normal form. 3/3479 useless extension candidates. Maximal degree in co-relation 32186. Up to 3047 conditions per place. [2023-08-31 04:15:37,071 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 548 selfloop transitions, 138 changer transitions 15/701 dead transitions. [2023-08-31 04:15:37,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 701 transitions, 16517 flow [2023-08-31 04:15:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 04:15:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 04:15:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3709 transitions. [2023-08-31 04:15:37,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33402377521613835 [2023-08-31 04:15:37,075 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3709 transitions. [2023-08-31 04:15:37,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3709 transitions. [2023-08-31 04:15:37,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:37,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3709 transitions. [2023-08-31 04:15:37,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 115.90625) internal successors, (3709), 32 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:37,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:37,082 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 347.0) internal successors, (11451), 33 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:37,082 INFO L175 Difference]: Start difference. First operand has 397 places, 594 transitions, 13946 flow. Second operand 32 states and 3709 transitions. [2023-08-31 04:15:37,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 701 transitions, 16517 flow [2023-08-31 04:15:37,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 701 transitions, 15705 flow, removed 83 selfloop flow, removed 22 redundant places. [2023-08-31 04:15:37,593 INFO L231 Difference]: Finished difference. Result has 412 places, 630 transitions, 14369 flow [2023-08-31 04:15:37,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13178, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=14369, PETRI_PLACES=412, PETRI_TRANSITIONS=630} [2023-08-31 04:15:37,593 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2023-08-31 04:15:37,593 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 630 transitions, 14369 flow [2023-08-31 04:15:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 112.62068965517241) internal successors, (3266), 29 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:37,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:37,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:37,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-31 04:15:37,795 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 [2023-08-31 04:15:37,796 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:37,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2091258710, now seen corresponding path program 8 times [2023-08-31 04:15:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:37,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194481427] [2023-08-31 04:15:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194481427] [2023-08-31 04:15:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194481427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294250293] [2023-08-31 04:15:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:15:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:37,921 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) [2023-08-31 04:15:37,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 04:15:38,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:15:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 04:15:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:38,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294250293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:38,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:38,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-31 04:15:38,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325255913] [2023-08-31 04:15:38,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:38,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:15:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:15:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:15:38,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:15:38,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 630 transitions, 14369 flow. Second operand has 14 states, 14 states have (on average 137.92857142857142) internal successors, (1931), 14 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:38,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:38,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:15:38,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:40,680 INFO L130 PetriNetUnfolder]: 2635/5195 cut-off events. [2023-08-31 04:15:40,681 INFO L131 PetriNetUnfolder]: For 140402/140402 co-relation queries the response was YES. [2023-08-31 04:15:40,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 5195 events. 2635/5195 cut-off events. For 140402/140402 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39183 event pairs, 297 based on Foata normal form. 70/5264 useless extension candidates. Maximal degree in co-relation 47262. Up to 1289 conditions per place. [2023-08-31 04:15:40,735 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 424 selfloop transitions, 485 changer transitions 4/913 dead transitions. [2023-08-31 04:15:40,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 913 transitions, 21309 flow [2023-08-31 04:15:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:15:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:15:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3015 transitions. [2023-08-31 04:15:40,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41375051461506795 [2023-08-31 04:15:40,738 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3015 transitions. [2023-08-31 04:15:40,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3015 transitions. [2023-08-31 04:15:40,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:40,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3015 transitions. [2023-08-31 04:15:40,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 143.57142857142858) internal successors, (3015), 21 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:40,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:40,743 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 347.0) internal successors, (7634), 22 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:40,743 INFO L175 Difference]: Start difference. First operand has 412 places, 630 transitions, 14369 flow. Second operand 21 states and 3015 transitions. [2023-08-31 04:15:40,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 913 transitions, 21309 flow [2023-08-31 04:15:41,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 913 transitions, 20964 flow, removed 108 selfloop flow, removed 20 redundant places. [2023-08-31 04:15:41,589 INFO L231 Difference]: Finished difference. Result has 416 places, 798 transitions, 19659 flow [2023-08-31 04:15:41,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=13777, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19659, PETRI_PLACES=416, PETRI_TRANSITIONS=798} [2023-08-31 04:15:41,590 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-08-31 04:15:41,590 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 798 transitions, 19659 flow [2023-08-31 04:15:41,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 137.92857142857142) internal successors, (1931), 14 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:41,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:41,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:41,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 04:15:41,795 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 [2023-08-31 04:15:41,795 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:41,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1479483227, now seen corresponding path program 9 times [2023-08-31 04:15:41,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:41,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400940926] [2023-08-31 04:15:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:42,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:42,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400940926] [2023-08-31 04:15:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400940926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:42,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527494738] [2023-08-31 04:15:42,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:15:42,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:42,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:42,479 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) [2023-08-31 04:15:42,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 04:15:42,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:15:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:15:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:42,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:15:42,841 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 160 treesize of output 118 [2023-08-31 04:15:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:42,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:43,498 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:15:43,499 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 35 treesize of output 74 [2023-08-31 04:15:43,551 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:15:43,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:15:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527494738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:43,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:43,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-31 04:15:43,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264970905] [2023-08-31 04:15:43,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:43,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 04:15:43,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 04:15:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-08-31 04:15:46,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 347 [2023-08-31 04:15:46,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 798 transitions, 19659 flow. Second operand has 28 states, 28 states have (on average 121.67857142857143) internal successors, (3407), 28 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:46,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:46,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 347 [2023-08-31 04:15:46,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:50,048 INFO L130 PetriNetUnfolder]: 2663/5250 cut-off events. [2023-08-31 04:15:50,048 INFO L131 PetriNetUnfolder]: For 157229/157229 co-relation queries the response was YES. [2023-08-31 04:15:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 5250 events. 2663/5250 cut-off events. For 157229/157229 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 39639 event pairs, 370 based on Foata normal form. 7/5256 useless extension candidates. Maximal degree in co-relation 51549. Up to 4759 conditions per place. [2023-08-31 04:15:50,106 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 729 selfloop transitions, 141 changer transitions 25/895 dead transitions. [2023-08-31 04:15:50,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 895 transitions, 22456 flow [2023-08-31 04:15:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:15:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:15:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4253 transitions. [2023-08-31 04:15:50,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604848279369385 [2023-08-31 04:15:50,109 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4253 transitions. [2023-08-31 04:15:50,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4253 transitions. [2023-08-31 04:15:50,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:50,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4253 transitions. [2023-08-31 04:15:50,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 125.08823529411765) internal successors, (4253), 34 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:50,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:50,117 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:50,117 INFO L175 Difference]: Start difference. First operand has 416 places, 798 transitions, 19659 flow. Second operand 34 states and 4253 transitions. [2023-08-31 04:15:50,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 895 transitions, 22456 flow [2023-08-31 04:15:51,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 895 transitions, 21514 flow, removed 173 selfloop flow, removed 10 redundant places. [2023-08-31 04:15:51,177 INFO L231 Difference]: Finished difference. Result has 446 places, 816 transitions, 19682 flow [2023-08-31 04:15:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=18721, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=19682, PETRI_PLACES=446, PETRI_TRANSITIONS=816} [2023-08-31 04:15:51,178 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 425 predicate places. [2023-08-31 04:15:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 816 transitions, 19682 flow [2023-08-31 04:15:51,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 121.67857142857143) internal successors, (3407), 28 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:51,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:51,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:51,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:51,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:51,379 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:51,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1984941564, now seen corresponding path program 10 times [2023-08-31 04:15:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329829142] [2023-08-31 04:15:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:51,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:51,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329829142] [2023-08-31 04:15:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329829142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:51,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918250438] [2023-08-31 04:15:51,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:15:51,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:51,524 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:51,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 04:15:51,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:15:51,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:15:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:51,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:15:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:15:52,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918250438] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:15:52,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:15:52,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:15:52,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094053185] [2023-08-31 04:15:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:15:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:15:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:15:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:15:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:15:52,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:15:52,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 816 transitions, 19682 flow. Second operand has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:52,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:15:52,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:15:52,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:15:56,408 INFO L130 PetriNetUnfolder]: 2927/5835 cut-off events. [2023-08-31 04:15:56,408 INFO L131 PetriNetUnfolder]: For 171867/171867 co-relation queries the response was YES. [2023-08-31 04:15:56,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55933 conditions, 5835 events. 2927/5835 cut-off events. For 171867/171867 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45752 event pairs, 758 based on Foata normal form. 62/5896 useless extension candidates. Maximal degree in co-relation 55707. Up to 4027 conditions per place. [2023-08-31 04:15:56,475 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 712 selfloop transitions, 315 changer transitions 1/1028 dead transitions. [2023-08-31 04:15:56,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1028 transitions, 24851 flow [2023-08-31 04:15:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 04:15:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 04:15:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5246 transitions. [2023-08-31 04:15:56,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40859880052963626 [2023-08-31 04:15:56,478 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5246 transitions. [2023-08-31 04:15:56,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5246 transitions. [2023-08-31 04:15:56,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:15:56,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5246 transitions. [2023-08-31 04:15:56,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 141.78378378378378) internal successors, (5246), 37 states have internal predecessors, (5246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:56,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:56,487 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:56,487 INFO L175 Difference]: Start difference. First operand has 446 places, 816 transitions, 19682 flow. Second operand 37 states and 5246 transitions. [2023-08-31 04:15:56,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1028 transitions, 24851 flow [2023-08-31 04:15:57,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1028 transitions, 24500 flow, removed 71 selfloop flow, removed 27 redundant places. [2023-08-31 04:15:57,729 INFO L231 Difference]: Finished difference. Result has 467 places, 910 transitions, 22655 flow [2023-08-31 04:15:57,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=19341, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22655, PETRI_PLACES=467, PETRI_TRANSITIONS=910} [2023-08-31 04:15:57,730 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 446 predicate places. [2023-08-31 04:15:57,730 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 910 transitions, 22655 flow [2023-08-31 04:15:57,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:15:57,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:15:57,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:15:57,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 04:15:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:57,938 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:15:57,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:15:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2141675087, now seen corresponding path program 11 times [2023-08-31 04:15:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:15:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199875338] [2023-08-31 04:15:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:15:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:15:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:15:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:15:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:15:58,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199875338] [2023-08-31 04:15:58,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199875338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:15:58,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630544652] [2023-08-31 04:15:58,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:15:58,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:15:58,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:15:58,705 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:15:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 04:15:58,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:15:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:15:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:15:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:15:59,373 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-08-31 04:15:59,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 104 treesize of output 188 [2023-08-31 04:16:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:16:01,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:01,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:16:01,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 170 treesize of output 195 [2023-08-31 04:16:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630544652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:02,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:02,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 27 [2023-08-31 04:16:02,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916666827] [2023-08-31 04:16:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:02,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:16:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:02,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:16:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:16:05,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:16:05,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 910 transitions, 22655 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:05,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:05,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:16:05,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:08,804 INFO L130 PetriNetUnfolder]: 3012/5990 cut-off events. [2023-08-31 04:16:08,804 INFO L131 PetriNetUnfolder]: For 182321/182321 co-relation queries the response was YES. [2023-08-31 04:16:08,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59577 conditions, 5990 events. 3012/5990 cut-off events. For 182321/182321 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47072 event pairs, 423 based on Foata normal form. 2/5991 useless extension candidates. Maximal degree in co-relation 59253. Up to 5564 conditions per place. [2023-08-31 04:16:08,885 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 877 selfloop transitions, 114 changer transitions 11/1002 dead transitions. [2023-08-31 04:16:08,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1002 transitions, 25903 flow [2023-08-31 04:16:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:16:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:16:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3307 transitions. [2023-08-31 04:16:08,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403664059283656 [2023-08-31 04:16:08,888 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3307 transitions. [2023-08-31 04:16:08,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3307 transitions. [2023-08-31 04:16:08,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:08,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3307 transitions. [2023-08-31 04:16:08,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 118.10714285714286) internal successors, (3307), 28 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:08,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 347.0) internal successors, (10063), 29 states have internal predecessors, (10063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:08,897 INFO L175 Difference]: Start difference. First operand has 467 places, 910 transitions, 22655 flow. Second operand 28 states and 3307 transitions. [2023-08-31 04:16:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1002 transitions, 25903 flow [2023-08-31 04:16:10,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1002 transitions, 25065 flow, removed 306 selfloop flow, removed 12 redundant places. [2023-08-31 04:16:10,617 INFO L231 Difference]: Finished difference. Result has 487 places, 943 transitions, 23082 flow [2023-08-31 04:16:10,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=21844, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=23082, PETRI_PLACES=487, PETRI_TRANSITIONS=943} [2023-08-31 04:16:10,618 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 466 predicate places. [2023-08-31 04:16:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 943 transitions, 23082 flow [2023-08-31 04:16:10,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:10,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:10,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:10,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:10,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:10,819 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:10,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1193348527, now seen corresponding path program 12 times [2023-08-31 04:16:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764991034] [2023-08-31 04:16:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:16:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764991034] [2023-08-31 04:16:11,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764991034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106457386] [2023-08-31 04:16:11,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:16:11,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:11,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:11,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:16:11,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 04:16:11,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:16:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:16:11,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:16:11,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:11,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:16:11,927 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 86 treesize of output 74 [2023-08-31 04:16:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:16:12,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:12,704 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:16:12,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:16:12,857 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:16:12,858 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 35 treesize of output 74 [2023-08-31 04:16:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:13,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106457386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:13,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:13,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2023-08-31 04:16:13,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740168117] [2023-08-31 04:16:13,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:13,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-31 04:16:13,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:13,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-31 04:16:13,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2023-08-31 04:16:15,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-31 04:16:15,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 943 transitions, 23082 flow. Second operand has 26 states, 26 states have (on average 115.73076923076923) internal successors, (3009), 26 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:15,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:15,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-31 04:16:15,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:18,862 INFO L130 PetriNetUnfolder]: 3067/6097 cut-off events. [2023-08-31 04:16:18,862 INFO L131 PetriNetUnfolder]: For 185882/185882 co-relation queries the response was YES. [2023-08-31 04:16:18,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60012 conditions, 6097 events. 3067/6097 cut-off events. For 185882/185882 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47913 event pairs, 399 based on Foata normal form. 3/6099 useless extension candidates. Maximal degree in co-relation 59675. Up to 5633 conditions per place. [2023-08-31 04:16:18,942 INFO L137 encePairwiseOnDemand]: 338/347 looper letters, 884 selfloop transitions, 125 changer transitions 14/1023 dead transitions. [2023-08-31 04:16:18,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1023 transitions, 26155 flow [2023-08-31 04:16:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:16:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:16:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2864 transitions. [2023-08-31 04:16:18,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34390009606147937 [2023-08-31 04:16:18,945 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2864 transitions. [2023-08-31 04:16:18,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2864 transitions. [2023-08-31 04:16:18,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:18,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2864 transitions. [2023-08-31 04:16:18,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 119.33333333333333) internal successors, (2864), 24 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:18,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:18,952 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:18,952 INFO L175 Difference]: Start difference. First operand has 487 places, 943 transitions, 23082 flow. Second operand 24 states and 2864 transitions. [2023-08-31 04:16:18,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1023 transitions, 26155 flow [2023-08-31 04:16:20,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1023 transitions, 25755 flow, removed 153 selfloop flow, removed 14 redundant places. [2023-08-31 04:16:20,534 INFO L231 Difference]: Finished difference. Result has 503 places, 965 transitions, 23656 flow [2023-08-31 04:16:20,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=22818, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23656, PETRI_PLACES=503, PETRI_TRANSITIONS=965} [2023-08-31 04:16:20,534 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 482 predicate places. [2023-08-31 04:16:20,535 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 965 transitions, 23656 flow [2023-08-31 04:16:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 115.73076923076923) internal successors, (3009), 26 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:20,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:20,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:20,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:20,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-31 04:16:20,736 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:20,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1931491441, now seen corresponding path program 12 times [2023-08-31 04:16:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734428281] [2023-08-31 04:16:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734428281] [2023-08-31 04:16:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734428281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249179489] [2023-08-31 04:16:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:16:20,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:20,941 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:16:20,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 04:16:21,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:16:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:16:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:16:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:21,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249179489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:21,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-31 04:16:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859364481] [2023-08-31 04:16:21,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:21,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:16:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:16:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:16:21,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:16:21,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 965 transitions, 23656 flow. Second operand has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:21,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:21,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:16:21,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:16:26,060 INFO L130 PetriNetUnfolder]: 3100/6163 cut-off events. [2023-08-31 04:16:26,060 INFO L131 PetriNetUnfolder]: For 201811/201811 co-relation queries the response was YES. [2023-08-31 04:16:26,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61095 conditions, 6163 events. 3100/6163 cut-off events. For 201811/201811 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 48868 event pairs, 874 based on Foata normal form. 48/6210 useless extension candidates. Maximal degree in co-relation 60743. Up to 4519 conditions per place. [2023-08-31 04:16:26,153 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 781 selfloop transitions, 270 changer transitions 0/1051 dead transitions. [2023-08-31 04:16:26,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1051 transitions, 26130 flow [2023-08-31 04:16:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 04:16:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 04:16:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3686 transitions. [2023-08-31 04:16:26,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40855686100642874 [2023-08-31 04:16:26,156 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3686 transitions. [2023-08-31 04:16:26,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3686 transitions. [2023-08-31 04:16:26,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:26,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3686 transitions. [2023-08-31 04:16:26,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 141.76923076923077) internal successors, (3686), 26 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:26,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:26,163 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 347.0) internal successors, (9369), 27 states have internal predecessors, (9369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:26,163 INFO L175 Difference]: Start difference. First operand has 503 places, 965 transitions, 23656 flow. Second operand 26 states and 3686 transitions. [2023-08-31 04:16:26,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1051 transitions, 26130 flow [2023-08-31 04:16:27,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1051 transitions, 25891 flow, removed 51 selfloop flow, removed 12 redundant places. [2023-08-31 04:16:27,831 INFO L231 Difference]: Finished difference. Result has 516 places, 972 transitions, 24071 flow [2023-08-31 04:16:27,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23417, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24071, PETRI_PLACES=516, PETRI_TRANSITIONS=972} [2023-08-31 04:16:27,833 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 495 predicate places. [2023-08-31 04:16:27,833 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 972 transitions, 24071 flow [2023-08-31 04:16:27,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:27,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:27,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:27,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-31 04:16:28,034 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:28,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash -259290172, now seen corresponding path program 13 times [2023-08-31 04:16:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829517608] [2023-08-31 04:16:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:28,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829517608] [2023-08-31 04:16:28,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829517608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574128455] [2023-08-31 04:16:28,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:16:28,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:28,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:28,197 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:16:28,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-31 04:16:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:16:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:28,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574128455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:12,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-31 04:17:12,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658492402] [2023-08-31 04:17:12,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:12,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:17:12,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:12,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:17:12,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:17:12,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:17:12,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 972 transitions, 24071 flow. Second operand has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:12,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:12,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:17:12,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:16,778 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 [] [2023-08-31 04:17:22,322 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 [] [2023-08-31 04:17:24,964 INFO L130 PetriNetUnfolder]: 3152/6383 cut-off events. [2023-08-31 04:17:24,965 INFO L131 PetriNetUnfolder]: For 209779/209779 co-relation queries the response was YES. [2023-08-31 04:17:25,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63373 conditions, 6383 events. 3152/6383 cut-off events. For 209779/209779 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 51810 event pairs, 506 based on Foata normal form. 60/6442 useless extension candidates. Maximal degree in co-relation 63098. Up to 2755 conditions per place. [2023-08-31 04:17:25,056 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 631 selfloop transitions, 478 changer transitions 4/1113 dead transitions. [2023-08-31 04:17:25,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1113 transitions, 28363 flow [2023-08-31 04:17:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 04:17:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 04:17:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5092 transitions. [2023-08-31 04:17:25,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762087736151137 [2023-08-31 04:17:25,060 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5092 transitions. [2023-08-31 04:17:25,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5092 transitions. [2023-08-31 04:17:25,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:25,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5092 transitions. [2023-08-31 04:17:25,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 141.44444444444446) internal successors, (5092), 36 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:25,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:25,068 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 347.0) internal successors, (12839), 37 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:25,068 INFO L175 Difference]: Start difference. First operand has 516 places, 972 transitions, 24071 flow. Second operand 36 states and 5092 transitions. [2023-08-31 04:17:25,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1113 transitions, 28363 flow [2023-08-31 04:17:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1113 transitions, 27772 flow, removed 68 selfloop flow, removed 20 redundant places. [2023-08-31 04:17:26,943 INFO L231 Difference]: Finished difference. Result has 537 places, 1022 transitions, 26219 flow [2023-08-31 04:17:26,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=23287, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26219, PETRI_PLACES=537, PETRI_TRANSITIONS=1022} [2023-08-31 04:17:26,944 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 516 predicate places. [2023-08-31 04:17:26,944 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1022 transitions, 26219 flow [2023-08-31 04:17:26,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.66666666666666) internal successors, (2478), 18 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:26,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:26,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:26,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:27,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-31 04:17:27,149 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:27,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1543461211, now seen corresponding path program 14 times [2023-08-31 04:17:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:27,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335917512] [2023-08-31 04:17:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:27,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:27,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335917512] [2023-08-31 04:17:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335917512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:27,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527833633] [2023-08-31 04:17:27,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:17:27,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:27,749 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:27,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-31 04:17:27,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:17:27,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:17:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:28,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:28,114 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 160 treesize of output 118 [2023-08-31 04:17:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:17:28,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:28,785 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:17:28,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:17:28,918 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:17:28,918 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 35 treesize of output 74 [2023-08-31 04:17:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527833633] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:29,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:17:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588882100] [2023-08-31 04:17:29,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:17:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:17:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:17:31,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 347 [2023-08-31 04:17:31,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1022 transitions, 26219 flow. Second operand has 29 states, 29 states have (on average 120.65517241379311) internal successors, (3499), 29 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:31,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:31,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 347 [2023-08-31 04:17:31,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:35,494 INFO L130 PetriNetUnfolder]: 3168/6417 cut-off events. [2023-08-31 04:17:35,494 INFO L131 PetriNetUnfolder]: For 224130/224130 co-relation queries the response was YES. [2023-08-31 04:17:35,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65830 conditions, 6417 events. 3168/6417 cut-off events. For 224130/224130 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51982 event pairs, 484 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 65462. Up to 5900 conditions per place. [2023-08-31 04:17:35,592 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 971 selfloop transitions, 125 changer transitions 15/1111 dead transitions. [2023-08-31 04:17:35,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 1111 transitions, 29248 flow [2023-08-31 04:17:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:17:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:17:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3852 transitions. [2023-08-31 04:17:35,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580924049456168 [2023-08-31 04:17:35,594 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3852 transitions. [2023-08-31 04:17:35,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3852 transitions. [2023-08-31 04:17:35,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:35,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3852 transitions. [2023-08-31 04:17:35,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 124.25806451612904) internal successors, (3852), 31 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:35,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:35,602 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:35,602 INFO L175 Difference]: Start difference. First operand has 537 places, 1022 transitions, 26219 flow. Second operand 31 states and 3852 transitions. [2023-08-31 04:17:35,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 1111 transitions, 29248 flow [2023-08-31 04:17:37,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1111 transitions, 28464 flow, removed 191 selfloop flow, removed 21 redundant places. [2023-08-31 04:17:37,762 INFO L231 Difference]: Finished difference. Result has 554 places, 1035 transitions, 26181 flow [2023-08-31 04:17:37,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25416, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26181, PETRI_PLACES=554, PETRI_TRANSITIONS=1035} [2023-08-31 04:17:37,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 533 predicate places. [2023-08-31 04:17:37,763 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1035 transitions, 26181 flow [2023-08-31 04:17:37,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 120.65517241379311) internal successors, (3499), 29 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:37,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:37,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:37,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:37,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-31 04:17:37,964 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:37,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1051477855, now seen corresponding path program 15 times [2023-08-31 04:17:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:37,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79823595] [2023-08-31 04:17:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79823595] [2023-08-31 04:17:38,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79823595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:38,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497705649] [2023-08-31 04:17:38,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:17:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:38,677 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:38,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-31 04:17:38,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:17:38,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:17:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:39,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:39,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:17:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:17:39,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:39,570 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:17:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:17:39,689 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:17:39,689 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 35 treesize of output 74 [2023-08-31 04:17:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:39,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497705649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:39,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:39,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:17:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245814831] [2023-08-31 04:17:39,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:39,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:17:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:17:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:17:42,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:17:42,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1035 transitions, 26181 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:42,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:42,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:17:42,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:46,995 INFO L130 PetriNetUnfolder]: 3181/6436 cut-off events. [2023-08-31 04:17:46,995 INFO L131 PetriNetUnfolder]: For 205506/205506 co-relation queries the response was YES. [2023-08-31 04:17:47,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64804 conditions, 6436 events. 3181/6436 cut-off events. For 205506/205506 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 51860 event pairs, 490 based on Foata normal form. 4/6439 useless extension candidates. Maximal degree in co-relation 64441. Up to 5926 conditions per place. [2023-08-31 04:17:47,100 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 969 selfloop transitions, 139 changer transitions 17/1125 dead transitions. [2023-08-31 04:17:47,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1125 transitions, 29024 flow [2023-08-31 04:17:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 04:17:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 04:17:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3910 transitions. [2023-08-31 04:17:47,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414548947690158 [2023-08-31 04:17:47,103 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3910 transitions. [2023-08-31 04:17:47,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3910 transitions. [2023-08-31 04:17:47,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:47,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3910 transitions. [2023-08-31 04:17:47,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 118.48484848484848) internal successors, (3910), 33 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:47,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:47,111 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:47,111 INFO L175 Difference]: Start difference. First operand has 554 places, 1035 transitions, 26181 flow. Second operand 33 states and 3910 transitions. [2023-08-31 04:17:47,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1125 transitions, 29024 flow [2023-08-31 04:17:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1125 transitions, 28741 flow, removed 43 selfloop flow, removed 23 redundant places. [2023-08-31 04:17:49,145 INFO L231 Difference]: Finished difference. Result has 565 places, 1040 transitions, 26390 flow [2023-08-31 04:17:49,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=25898, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26390, PETRI_PLACES=565, PETRI_TRANSITIONS=1040} [2023-08-31 04:17:49,146 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-08-31 04:17:49,146 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1040 transitions, 26390 flow [2023-08-31 04:17:49,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:49,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:49,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:49,348 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:49,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash 546417695, now seen corresponding path program 16 times [2023-08-31 04:17:49,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35162476] [2023-08-31 04:17:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:17:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35162476] [2023-08-31 04:17:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35162476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812376258] [2023-08-31 04:17:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:17:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:49,966 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:49,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-31 04:17:50,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:17:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:17:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:50,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:17:50,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:17:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:17:50,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:51,022 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:17:51,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:17:51,150 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:17:51,150 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 35 treesize of output 74 [2023-08-31 04:17:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812376258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:51,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:51,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-31 04:17:51,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136678253] [2023-08-31 04:17:51,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:51,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 04:17:51,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 04:17:51,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-08-31 04:17:54,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 347 [2023-08-31 04:17:54,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1040 transitions, 26390 flow. Second operand has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:54,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:54,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 347 [2023-08-31 04:17:54,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:58,175 INFO L130 PetriNetUnfolder]: 3250/6555 cut-off events. [2023-08-31 04:17:58,175 INFO L131 PetriNetUnfolder]: For 212501/212501 co-relation queries the response was YES. [2023-08-31 04:17:58,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66546 conditions, 6555 events. 3250/6555 cut-off events. For 212501/212501 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53002 event pairs, 445 based on Foata normal form. 5/6559 useless extension candidates. Maximal degree in co-relation 66179. Up to 6016 conditions per place. [2023-08-31 04:17:58,285 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1003 selfloop transitions, 135 changer transitions 14/1152 dead transitions. [2023-08-31 04:17:58,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 1152 transitions, 29881 flow [2023-08-31 04:17:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:17:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:17:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3805 transitions. [2023-08-31 04:17:58,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3537231570140374 [2023-08-31 04:17:58,288 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3805 transitions. [2023-08-31 04:17:58,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3805 transitions. [2023-08-31 04:17:58,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:58,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3805 transitions. [2023-08-31 04:17:58,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 122.74193548387096) internal successors, (3805), 31 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:58,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:58,295 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:58,296 INFO L175 Difference]: Start difference. First operand has 565 places, 1040 transitions, 26390 flow. Second operand 31 states and 3805 transitions. [2023-08-31 04:17:58,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 1152 transitions, 29881 flow [2023-08-31 04:18:00,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1152 transitions, 29609 flow, removed 36 selfloop flow, removed 22 redundant places. [2023-08-31 04:18:00,297 INFO L231 Difference]: Finished difference. Result has 579 places, 1065 transitions, 27211 flow [2023-08-31 04:18:00,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26118, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27211, PETRI_PLACES=579, PETRI_TRANSITIONS=1065} [2023-08-31 04:18:00,298 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 558 predicate places. [2023-08-31 04:18:00,298 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1065 transitions, 27211 flow [2023-08-31 04:18:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:00,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:00,299 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:00,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-31 04:18:00,499 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:00,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash -213905598, now seen corresponding path program 17 times [2023-08-31 04:18:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381372700] [2023-08-31 04:18:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381372700] [2023-08-31 04:18:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381372700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802365498] [2023-08-31 04:18:00,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:18:00,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:00,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:00,636 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:00,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-31 04:18:00,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:18:00,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:00,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 04:18:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:00,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:18:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802365498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:00,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:00,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 15 [2023-08-31 04:18:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836059930] [2023-08-31 04:18:00,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:18:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:18:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:18:01,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:18:01,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1065 transitions, 27211 flow. Second operand has 15 states, 15 states have (on average 138.13333333333333) internal successors, (2072), 15 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:01,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:01,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:18:01,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:04,653 INFO L130 PetriNetUnfolder]: 3398/6795 cut-off events. [2023-08-31 04:18:04,653 INFO L131 PetriNetUnfolder]: For 233820/233820 co-relation queries the response was YES. [2023-08-31 04:18:04,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70103 conditions, 6795 events. 3398/6795 cut-off events. For 233820/233820 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 54901 event pairs, 103 based on Foata normal form. 60/6854 useless extension candidates. Maximal degree in co-relation 69728. Up to 2200 conditions per place. [2023-08-31 04:18:04,751 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 640 selfloop transitions, 644 changer transitions 4/1288 dead transitions. [2023-08-31 04:18:04,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1288 transitions, 34763 flow [2023-08-31 04:18:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 04:18:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 04:18:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3395 transitions. [2023-08-31 04:18:04,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40766090297790586 [2023-08-31 04:18:04,753 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3395 transitions. [2023-08-31 04:18:04,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3395 transitions. [2023-08-31 04:18:04,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:04,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3395 transitions. [2023-08-31 04:18:04,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 141.45833333333334) internal successors, (3395), 24 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:04,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:04,760 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 347.0) internal successors, (8675), 25 states have internal predecessors, (8675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:04,760 INFO L175 Difference]: Start difference. First operand has 579 places, 1065 transitions, 27211 flow. Second operand 24 states and 3395 transitions. [2023-08-31 04:18:04,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1288 transitions, 34763 flow [2023-08-31 04:18:06,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1288 transitions, 34238 flow, removed 112 selfloop flow, removed 27 redundant places. [2023-08-31 04:18:06,790 INFO L231 Difference]: Finished difference. Result has 580 places, 1148 transitions, 30694 flow [2023-08-31 04:18:06,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=26633, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=30694, PETRI_PLACES=580, PETRI_TRANSITIONS=1148} [2023-08-31 04:18:06,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 559 predicate places. [2023-08-31 04:18:06,791 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1148 transitions, 30694 flow [2023-08-31 04:18:06,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.13333333333333) internal successors, (2072), 15 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:06,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:06,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:06,992 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:06,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1679609131, now seen corresponding path program 13 times [2023-08-31 04:18:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086426475] [2023-08-31 04:18:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:07,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:07,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086426475] [2023-08-31 04:18:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086426475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:07,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060355122] [2023-08-31 04:18:07,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:18:07,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:07,143 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:07,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-31 04:18:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:18:07,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:07,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060355122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:07,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:07,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-31 04:18:07,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310660337] [2023-08-31 04:18:07,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:18:07,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:18:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:18:07,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:18:07,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1148 transitions, 30694 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:07,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:07,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:18:07,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:13,288 INFO L130 PetriNetUnfolder]: 4418/8625 cut-off events. [2023-08-31 04:18:13,288 INFO L131 PetriNetUnfolder]: For 311446/311446 co-relation queries the response was YES. [2023-08-31 04:18:13,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91283 conditions, 8625 events. 4418/8625 cut-off events. For 311446/311446 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 71001 event pairs, 74 based on Foata normal form. 28/8652 useless extension candidates. Maximal degree in co-relation 90894. Up to 2253 conditions per place. [2023-08-31 04:18:13,428 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 507 selfloop transitions, 1030 changer transitions 0/1537 dead transitions. [2023-08-31 04:18:13,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1537 transitions, 41856 flow [2023-08-31 04:18:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 04:18:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 04:18:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5259 transitions. [2023-08-31 04:18:13,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096113404470753 [2023-08-31 04:18:13,432 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5259 transitions. [2023-08-31 04:18:13,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5259 transitions. [2023-08-31 04:18:13,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:13,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5259 transitions. [2023-08-31 04:18:13,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 142.13513513513513) internal successors, (5259), 37 states have internal predecessors, (5259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:13,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:13,441 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:13,441 INFO L175 Difference]: Start difference. First operand has 580 places, 1148 transitions, 30694 flow. Second operand 37 states and 5259 transitions. [2023-08-31 04:18:13,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1537 transitions, 41856 flow [2023-08-31 04:18:17,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1537 transitions, 40470 flow, removed 435 selfloop flow, removed 12 redundant places. [2023-08-31 04:18:17,154 INFO L231 Difference]: Finished difference. Result has 605 places, 1366 transitions, 37792 flow [2023-08-31 04:18:17,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=29652, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=844, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=37792, PETRI_PLACES=605, PETRI_TRANSITIONS=1366} [2023-08-31 04:18:17,155 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 584 predicate places. [2023-08-31 04:18:17,155 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1366 transitions, 37792 flow [2023-08-31 04:18:17,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:17,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:17,156 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:17,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:17,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:17,362 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:17,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash 204373709, now seen corresponding path program 14 times [2023-08-31 04:18:17,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:17,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774604426] [2023-08-31 04:18:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:17,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774604426] [2023-08-31 04:18:17,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774604426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:17,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606200998] [2023-08-31 04:18:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:18:17,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:17,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:17,505 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:17,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-31 04:18:17,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:18:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:18:17,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:17,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606200998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:17,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:17,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-31 04:18:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329000592] [2023-08-31 04:18:17,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:18:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:18:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:18:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:18:18,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1366 transitions, 37792 flow. Second operand has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:18,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:18,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:18:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:23,582 INFO L130 PetriNetUnfolder]: 4443/8652 cut-off events. [2023-08-31 04:18:23,582 INFO L131 PetriNetUnfolder]: For 281789/281789 co-relation queries the response was YES. [2023-08-31 04:18:23,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91668 conditions, 8652 events. 4443/8652 cut-off events. For 281789/281789 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 71067 event pairs, 74 based on Foata normal form. 4/8655 useless extension candidates. Maximal degree in co-relation 91296. Up to 2263 conditions per place. [2023-08-31 04:18:23,717 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 501 selfloop transitions, 1023 changer transitions 0/1524 dead transitions. [2023-08-31 04:18:23,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1524 transitions, 43203 flow [2023-08-31 04:18:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 04:18:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 04:18:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3861 transitions. [2023-08-31 04:18:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41210374639769454 [2023-08-31 04:18:23,720 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3861 transitions. [2023-08-31 04:18:23,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3861 transitions. [2023-08-31 04:18:23,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:23,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3861 transitions. [2023-08-31 04:18:23,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 143.0) internal successors, (3861), 27 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:23,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:23,726 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:23,726 INFO L175 Difference]: Start difference. First operand has 605 places, 1366 transitions, 37792 flow. Second operand 27 states and 3861 transitions. [2023-08-31 04:18:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1524 transitions, 43203 flow [2023-08-31 04:18:27,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1524 transitions, 41009 flow, removed 591 selfloop flow, removed 16 redundant places. [2023-08-31 04:18:27,136 INFO L231 Difference]: Finished difference. Result has 618 places, 1378 transitions, 38606 flow [2023-08-31 04:18:27,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=35582, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38606, PETRI_PLACES=618, PETRI_TRANSITIONS=1378} [2023-08-31 04:18:27,137 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-08-31 04:18:27,137 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1378 transitions, 38606 flow [2023-08-31 04:18:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.6315789473684) internal successors, (2615), 19 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:27,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:27,138 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:27,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:27,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-31 04:18:27,343 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:27,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1894697581, now seen corresponding path program 18 times [2023-08-31 04:18:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:27,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603840880] [2023-08-31 04:18:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603840880] [2023-08-31 04:18:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603840880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234342421] [2023-08-31 04:18:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:18:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:28,083 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:28,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-31 04:18:28,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:18:28,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:18:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:28,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:18:28,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:18:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:18:28,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:29,067 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:18:29,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:18:29,182 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:18:29,182 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 35 treesize of output 74 [2023-08-31 04:18:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234342421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:29,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:18:29,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057514378] [2023-08-31 04:18:29,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:18:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:18:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:18:32,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:18:32,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1378 transitions, 38606 flow. Second operand has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:32,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:32,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:18:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:41,137 INFO L130 PetriNetUnfolder]: 4663/9052 cut-off events. [2023-08-31 04:18:41,137 INFO L131 PetriNetUnfolder]: For 292736/292736 co-relation queries the response was YES. [2023-08-31 04:18:41,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 9052 events. 4663/9052 cut-off events. For 292736/292736 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 74680 event pairs, 534 based on Foata normal form. 8/9059 useless extension candidates. Maximal degree in co-relation 95557. Up to 8328 conditions per place. [2023-08-31 04:18:41,281 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1340 selfloop transitions, 238 changer transitions 19/1597 dead transitions. [2023-08-31 04:18:41,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1597 transitions, 45312 flow [2023-08-31 04:18:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-31 04:18:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-31 04:18:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5695 transitions. [2023-08-31 04:18:41,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341918828049952 [2023-08-31 04:18:41,285 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5695 transitions. [2023-08-31 04:18:41,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5695 transitions. [2023-08-31 04:18:41,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:41,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5695 transitions. [2023-08-31 04:18:41,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 118.64583333333333) internal successors, (5695), 48 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:41,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:41,296 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 347.0) internal successors, (17003), 49 states have internal predecessors, (17003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:41,296 INFO L175 Difference]: Start difference. First operand has 618 places, 1378 transitions, 38606 flow. Second operand 48 states and 5695 transitions. [2023-08-31 04:18:41,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1597 transitions, 45312 flow [2023-08-31 04:18:44,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1597 transitions, 44426 flow, removed 10 selfloop flow, removed 16 redundant places. [2023-08-31 04:18:44,974 INFO L231 Difference]: Finished difference. Result has 667 places, 1471 transitions, 41264 flow [2023-08-31 04:18:44,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=37825, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=41264, PETRI_PLACES=667, PETRI_TRANSITIONS=1471} [2023-08-31 04:18:44,975 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 646 predicate places. [2023-08-31 04:18:44,975 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1471 transitions, 41264 flow [2023-08-31 04:18:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.79310344827586) internal successors, (3329), 29 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:44,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:45,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-31 04:18:45,181 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:45,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:45,182 INFO L85 PathProgramCache]: Analyzing trace with hash 137009307, now seen corresponding path program 19 times [2023-08-31 04:18:45,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:45,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112005760] [2023-08-31 04:18:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:45,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:18:45,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112005760] [2023-08-31 04:18:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112005760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561999146] [2023-08-31 04:18:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:18:45,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:45,879 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:45,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-31 04:18:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:45,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:18:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:46,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:18:46,445 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 86 treesize of output 74 [2023-08-31 04:18:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:18:46,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:47,119 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:18:47,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:18:47,241 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:18:47,242 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 35 treesize of output 74 [2023-08-31 04:18:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:47,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561999146] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:47,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:47,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-31 04:18:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066332290] [2023-08-31 04:18:47,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 04:18:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 04:18:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-31 04:18:49,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-31 04:18:49,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1471 transitions, 41264 flow. Second operand has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:49,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:49,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-31 04:18:49,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:54,611 INFO L130 PetriNetUnfolder]: 4646/9012 cut-off events. [2023-08-31 04:18:54,611 INFO L131 PetriNetUnfolder]: For 291498/291498 co-relation queries the response was YES. [2023-08-31 04:18:54,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96300 conditions, 9012 events. 4646/9012 cut-off events. For 291498/291498 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 73947 event pairs, 553 based on Foata normal form. 1/9012 useless extension candidates. Maximal degree in co-relation 95828. Up to 8547 conditions per place. [2023-08-31 04:18:54,769 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1374 selfloop transitions, 139 changer transitions 8/1521 dead transitions. [2023-08-31 04:18:54,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1521 transitions, 44543 flow [2023-08-31 04:18:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:18:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:18:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2745 transitions. [2023-08-31 04:18:54,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439418619220649 [2023-08-31 04:18:54,772 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2745 transitions. [2023-08-31 04:18:54,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2745 transitions. [2023-08-31 04:18:54,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:54,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2745 transitions. [2023-08-31 04:18:54,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 119.34782608695652) internal successors, (2745), 23 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:54,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:54,777 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:54,777 INFO L175 Difference]: Start difference. First operand has 667 places, 1471 transitions, 41264 flow. Second operand 23 states and 2745 transitions. [2023-08-31 04:18:54,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1521 transitions, 44543 flow [2023-08-31 04:18:58,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1521 transitions, 43500 flow, removed 169 selfloop flow, removed 22 redundant places. [2023-08-31 04:18:58,768 INFO L231 Difference]: Finished difference. Result has 669 places, 1473 transitions, 40581 flow [2023-08-31 04:18:58,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40221, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40581, PETRI_PLACES=669, PETRI_TRANSITIONS=1473} [2023-08-31 04:18:58,769 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 648 predicate places. [2023-08-31 04:18:58,769 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 1473 transitions, 40581 flow [2023-08-31 04:18:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:58,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:58,770 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:58,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:58,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-31 04:18:58,973 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:58,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -429871751, now seen corresponding path program 15 times [2023-08-31 04:18:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:58,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402436650] [2023-08-31 04:18:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:59,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402436650] [2023-08-31 04:18:59,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402436650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:59,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474777530] [2023-08-31 04:18:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:18:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:59,119 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:59,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-31 04:18:59,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:18:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:18:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:59,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474777530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:59,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-31 04:18:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132989021] [2023-08-31 04:18:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:59,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:18:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:18:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:18:59,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:18:59,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 1473 transitions, 40581 flow. Second operand has 15 states, 15 states have (on average 138.0) internal successors, (2070), 15 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:59,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:59,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:18:59,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:06,247 INFO L130 PetriNetUnfolder]: 4673/9066 cut-off events. [2023-08-31 04:19:06,247 INFO L131 PetriNetUnfolder]: For 289567/289567 co-relation queries the response was YES. [2023-08-31 04:19:06,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95920 conditions, 9066 events. 4673/9066 cut-off events. For 289567/289567 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 74691 event pairs, 305 based on Foata normal form. 24/9089 useless extension candidates. Maximal degree in co-relation 95474. Up to 2936 conditions per place. [2023-08-31 04:19:06,399 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 662 selfloop transitions, 939 changer transitions 0/1601 dead transitions. [2023-08-31 04:19:06,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 1601 transitions, 45585 flow [2023-08-31 04:19:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 04:19:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 04:19:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3823 transitions. [2023-08-31 04:19:06,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080478172697193 [2023-08-31 04:19:06,402 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3823 transitions. [2023-08-31 04:19:06,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3823 transitions. [2023-08-31 04:19:06,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:06,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3823 transitions. [2023-08-31 04:19:06,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 141.59259259259258) internal successors, (3823), 27 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:06,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:06,410 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 347.0) internal successors, (9716), 28 states have internal predecessors, (9716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:06,410 INFO L175 Difference]: Start difference. First operand has 669 places, 1473 transitions, 40581 flow. Second operand 27 states and 3823 transitions. [2023-08-31 04:19:06,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 1601 transitions, 45585 flow [2023-08-31 04:19:10,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 1601 transitions, 45287 flow, removed 24 selfloop flow, removed 18 redundant places. [2023-08-31 04:19:10,188 INFO L231 Difference]: Finished difference. Result has 679 places, 1483 transitions, 42377 flow [2023-08-31 04:19:10,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=40287, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=931, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=42377, PETRI_PLACES=679, PETRI_TRANSITIONS=1483} [2023-08-31 04:19:10,190 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 658 predicate places. [2023-08-31 04:19:10,190 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 1483 transitions, 42377 flow [2023-08-31 04:19:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.0) internal successors, (2070), 15 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:10,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:10,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:10,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-31 04:19:10,396 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:10,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash 155443333, now seen corresponding path program 20 times [2023-08-31 04:19:10,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:10,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956793744] [2023-08-31 04:19:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:11,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956793744] [2023-08-31 04:19:11,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956793744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:11,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136049171] [2023-08-31 04:19:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:19:11,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:11,201 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:11,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-31 04:19:11,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:19:11,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:19:11,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:11,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:11,586 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 86 treesize of output 74 [2023-08-31 04:19:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:19:11,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:12,324 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:19:12,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:19:12,467 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:19:12,467 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 35 treesize of output 74 [2023-08-31 04:19:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136049171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:12,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-31 04:19:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430149887] [2023-08-31 04:19:12,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 04:19:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 04:19:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-31 04:19:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-31 04:19:15,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1483 transitions, 42377 flow. Second operand has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:15,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:15,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-31 04:19:15,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:21,582 INFO L130 PetriNetUnfolder]: 5377/10221 cut-off events. [2023-08-31 04:19:21,582 INFO L131 PetriNetUnfolder]: For 334484/334484 co-relation queries the response was YES. [2023-08-31 04:19:21,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110787 conditions, 10221 events. 5377/10221 cut-off events. For 334484/334484 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 84484 event pairs, 589 based on Foata normal form. 3/10223 useless extension candidates. Maximal degree in co-relation 110263. Up to 8683 conditions per place. [2023-08-31 04:19:21,753 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1447 selfloop transitions, 315 changer transitions 10/1772 dead transitions. [2023-08-31 04:19:21,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1772 transitions, 52117 flow [2023-08-31 04:19:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 04:19:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 04:19:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3599 transitions. [2023-08-31 04:19:21,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457252641690682 [2023-08-31 04:19:21,756 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3599 transitions. [2023-08-31 04:19:21,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3599 transitions. [2023-08-31 04:19:21,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:21,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3599 transitions. [2023-08-31 04:19:21,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 119.96666666666667) internal successors, (3599), 30 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:21,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:21,763 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 347.0) internal successors, (10757), 31 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:21,763 INFO L175 Difference]: Start difference. First operand has 679 places, 1483 transitions, 42377 flow. Second operand 30 states and 3599 transitions. [2023-08-31 04:19:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1772 transitions, 52117 flow [2023-08-31 04:19:26,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1772 transitions, 51256 flow, removed 122 selfloop flow, removed 16 redundant places. [2023-08-31 04:19:26,146 INFO L231 Difference]: Finished difference. Result has 701 places, 1612 transitions, 46772 flow [2023-08-31 04:19:26,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=41636, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=46772, PETRI_PLACES=701, PETRI_TRANSITIONS=1612} [2023-08-31 04:19:26,147 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 680 predicate places. [2023-08-31 04:19:26,147 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 1612 transitions, 46772 flow [2023-08-31 04:19:26,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 115.71428571428571) internal successors, (3240), 28 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:26,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:26,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:26,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-31 04:19:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:26,352 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:26,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1526177793, now seen corresponding path program 21 times [2023-08-31 04:19:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283607530] [2023-08-31 04:19:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:26,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283607530] [2023-08-31 04:19:26,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283607530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278997180] [2023-08-31 04:19:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:19:26,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:26,845 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:26,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-31 04:19:26,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:19:26,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-31 04:19:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:27,040 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 13 treesize of output 9 [2023-08-31 04:19:27,081 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 [2023-08-31 04:19:27,111 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 [2023-08-31 04:19:27,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:27,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-08-31 04:19:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:28,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:28,382 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 166 treesize of output 106 [2023-08-31 04:19:28,426 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:19:28,426 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 592 treesize of output 571 [2023-08-31 04:19:28,478 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:19:28,478 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 133 treesize of output 133 [2023-08-31 04:19:28,605 INFO L321 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-31 04:19:28,605 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 100 treesize of output 136 [2023-08-31 04:19:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:28,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278997180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:28,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:28,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-08-31 04:19:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951638688] [2023-08-31 04:19:28,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-31 04:19:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:28,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-31 04:19:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=794, Unknown=5, NotChecked=0, Total=992 [2023-08-31 04:19:31,428 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] [2023-08-31 04:19:34,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:36,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:39,034 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] [2023-08-31 04:19:39,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 347 [2023-08-31 04:19:39,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 1612 transitions, 46772 flow. Second operand has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:39,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:39,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 347 [2023-08-31 04:19:39,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:48,780 INFO L130 PetriNetUnfolder]: 5533/10483 cut-off events. [2023-08-31 04:19:48,780 INFO L131 PetriNetUnfolder]: For 355828/355828 co-relation queries the response was YES. [2023-08-31 04:19:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115183 conditions, 10483 events. 5533/10483 cut-off events. For 355828/355828 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 86750 event pairs, 676 based on Foata normal form. 10/10492 useless extension candidates. Maximal degree in co-relation 114598. Up to 10010 conditions per place. [2023-08-31 04:19:48,963 INFO L137 encePairwiseOnDemand]: 334/347 looper letters, 1574 selfloop transitions, 161 changer transitions 23/1758 dead transitions. [2023-08-31 04:19:48,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 1758 transitions, 52693 flow [2023-08-31 04:19:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 04:19:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 04:19:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2972 transitions. [2023-08-31 04:19:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22539056575155467 [2023-08-31 04:19:48,966 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2972 transitions. [2023-08-31 04:19:48,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2972 transitions. [2023-08-31 04:19:48,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:48,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2972 transitions. [2023-08-31 04:19:48,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 78.21052631578948) internal successors, (2972), 38 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:48,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:48,973 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:48,973 INFO L175 Difference]: Start difference. First operand has 701 places, 1612 transitions, 46772 flow. Second operand 38 states and 2972 transitions. [2023-08-31 04:19:48,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 1758 transitions, 52693 flow [2023-08-31 04:19:53,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 1758 transitions, 52320 flow, removed 72 selfloop flow, removed 21 redundant places. [2023-08-31 04:19:53,753 INFO L231 Difference]: Finished difference. Result has 732 places, 1667 transitions, 48621 flow [2023-08-31 04:19:53,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=46400, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=48621, PETRI_PLACES=732, PETRI_TRANSITIONS=1667} [2023-08-31 04:19:53,754 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 711 predicate places. [2023-08-31 04:19:53,754 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 1667 transitions, 48621 flow [2023-08-31 04:19:53,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.53125) internal successors, (2385), 32 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:53,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:53,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:53,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-31 04:19:53,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-31 04:19:53,955 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:53,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1921224719, now seen corresponding path program 22 times [2023-08-31 04:19:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:53,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343641839] [2023-08-31 04:19:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:53,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:19:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343641839] [2023-08-31 04:19:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343641839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919185279] [2023-08-31 04:19:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:19:54,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:54,681 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:54,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-31 04:19:54,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:19:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:54,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-31 04:19:54,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:55,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:19:55,094 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 86 treesize of output 74 [2023-08-31 04:19:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:55,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:55,522 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:19:55,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:19:55,629 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:19:55,630 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 35 treesize of output 74 [2023-08-31 04:19:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:55,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919185279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:55,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:55,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-31 04:19:55,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657923237] [2023-08-31 04:19:55,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:55,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:19:55,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:19:55,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-08-31 04:19:57,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 347 [2023-08-31 04:19:57,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 1667 transitions, 48621 flow. Second operand has 27 states, 27 states have (on average 116.74074074074075) internal successors, (3152), 27 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:57,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:57,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 347 [2023-08-31 04:19:57,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:20:05,100 INFO L130 PetriNetUnfolder]: 5595/10738 cut-off events. [2023-08-31 04:20:05,100 INFO L131 PetriNetUnfolder]: For 377337/377337 co-relation queries the response was YES. [2023-08-31 04:20:05,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119067 conditions, 10738 events. 5595/10738 cut-off events. For 377337/377337 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 90494 event pairs, 869 based on Foata normal form. 3/10740 useless extension candidates. Maximal degree in co-relation 118451. Up to 8760 conditions per place. [2023-08-31 04:20:05,295 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1531 selfloop transitions, 355 changer transitions 8/1894 dead transitions. [2023-08-31 04:20:05,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 1894 transitions, 56525 flow [2023-08-31 04:20:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 04:20:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 04:20:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3972 transitions. [2023-08-31 04:20:05,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468692690594708 [2023-08-31 04:20:05,298 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3972 transitions. [2023-08-31 04:20:05,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3972 transitions. [2023-08-31 04:20:05,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:20:05,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3972 transitions. [2023-08-31 04:20:05,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 120.36363636363636) internal successors, (3972), 33 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:05,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:05,306 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:05,306 INFO L175 Difference]: Start difference. First operand has 732 places, 1667 transitions, 48621 flow. Second operand 33 states and 3972 transitions. [2023-08-31 04:20:05,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 1894 transitions, 56525 flow [2023-08-31 04:20:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1894 transitions, 55885 flow, removed 213 selfloop flow, removed 20 redundant places. [2023-08-31 04:20:10,696 INFO L231 Difference]: Finished difference. Result has 752 places, 1725 transitions, 50944 flow [2023-08-31 04:20:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=47989, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=50944, PETRI_PLACES=752, PETRI_TRANSITIONS=1725} [2023-08-31 04:20:10,697 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 731 predicate places. [2023-08-31 04:20:10,698 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 1725 transitions, 50944 flow [2023-08-31 04:20:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 116.74074074074075) internal successors, (3152), 27 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:20:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:20:10,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-31 04:20:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:20:10,900 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:20:10,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:20:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1610738549, now seen corresponding path program 23 times [2023-08-31 04:20:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:20:10,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919132840] [2023-08-31 04:20:10,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:20:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:20:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:20:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:20:12,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:20:12,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919132840] [2023-08-31 04:20:12,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919132840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:20:12,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882179033] [2023-08-31 04:20:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:20:12,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:20:12,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:20:12,606 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:20:12,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-31 04:20:12,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:20:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:20:12,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-31 04:20:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:20:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:20:13,526 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 22 treesize of output 22 [2023-08-31 04:20:13,957 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2023-08-31 04:20:13,958 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 35 treesize of output 39 [2023-08-31 04:20:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:20:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:20:15,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:20:15,222 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 76 treesize of output 108 [2023-08-31 04:20:15,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:20:15,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 36 [2023-08-31 04:20:15,289 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:20:15,319 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:20:15,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:20:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882179033] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:20:15,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:20:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-31 04:20:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568224474] [2023-08-31 04:20:15,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:20:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:20:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:20:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:20:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=952, Unknown=1, NotChecked=0, Total=1056 [2023-08-31 04:20:17,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:21,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:22,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:24,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:30,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:32,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:34,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:36,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:38,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:41,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:44,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 04:20:47,859 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 [] [2023-08-31 04:20:51,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:20:51,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 1725 transitions, 50944 flow. Second operand has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:51,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:20:51,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:20:51,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:05,318 INFO L130 PetriNetUnfolder]: 5806/11159 cut-off events. [2023-08-31 04:21:05,319 INFO L131 PetriNetUnfolder]: For 397161/397161 co-relation queries the response was YES. [2023-08-31 04:21:05,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124735 conditions, 11159 events. 5806/11159 cut-off events. For 397161/397161 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 94878 event pairs, 431 based on Foata normal form. 9/11167 useless extension candidates. Maximal degree in co-relation 124160. Up to 9587 conditions per place. [2023-08-31 04:21:05,520 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1480 selfloop transitions, 427 changer transitions 22/1929 dead transitions. [2023-08-31 04:21:05,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 1929 transitions, 57877 flow [2023-08-31 04:21:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 04:21:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 04:21:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3893 transitions. [2023-08-31 04:21:05,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26090744588164333 [2023-08-31 04:21:05,524 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3893 transitions. [2023-08-31 04:21:05,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3893 transitions. [2023-08-31 04:21:05,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:05,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3893 transitions. [2023-08-31 04:21:05,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 90.53488372093024) internal successors, (3893), 43 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:05,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:05,532 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 347.0) internal successors, (15268), 44 states have internal predecessors, (15268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:05,532 INFO L175 Difference]: Start difference. First operand has 752 places, 1725 transitions, 50944 flow. Second operand 43 states and 3893 transitions. [2023-08-31 04:21:05,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 1929 transitions, 57877 flow [2023-08-31 04:21:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1929 transitions, 57396 flow, removed 114 selfloop flow, removed 15 redundant places. [2023-08-31 04:21:11,494 INFO L231 Difference]: Finished difference. Result has 791 places, 1805 transitions, 53798 flow [2023-08-31 04:21:11,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=50467, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=53798, PETRI_PLACES=791, PETRI_TRANSITIONS=1805} [2023-08-31 04:21:11,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 770 predicate places. [2023-08-31 04:21:11,495 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 1805 transitions, 53798 flow [2023-08-31 04:21:11,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.57575757575758) internal successors, (2857), 33 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:11,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:11,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:11,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:11,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-08-31 04:21:11,696 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:21:11,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1671129951, now seen corresponding path program 24 times [2023-08-31 04:21:11,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:11,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417461472] [2023-08-31 04:21:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:11,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:21:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417461472] [2023-08-31 04:21:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417461472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:21:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618407637] [2023-08-31 04:21:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:21:12,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:12,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:12,518 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:21:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-31 04:21:12,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:21:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:21:12,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:21:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:12,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:21:12,897 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 160 treesize of output 118 [2023-08-31 04:21:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:21:13,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:21:13,661 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:21:13,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:21:13,778 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:21:13,778 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 35 treesize of output 74 [2023-08-31 04:21:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618407637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:21:13,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:21:13,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-31 04:21:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657961460] [2023-08-31 04:21:13,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:21:13,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 04:21:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 04:21:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-08-31 04:21:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 347 [2023-08-31 04:21:17,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1805 transitions, 53798 flow. Second operand has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:17,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:17,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 347 [2023-08-31 04:21:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:26,724 INFO L130 PetriNetUnfolder]: 5799/11153 cut-off events. [2023-08-31 04:21:26,724 INFO L131 PetriNetUnfolder]: For 423913/423913 co-relation queries the response was YES. [2023-08-31 04:21:26,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127102 conditions, 11153 events. 5799/11153 cut-off events. For 423913/423913 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 95113 event pairs, 987 based on Foata normal form. 7/11159 useless extension candidates. Maximal degree in co-relation 126670. Up to 10559 conditions per place. [2023-08-31 04:21:26,943 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1676 selfloop transitions, 201 changer transitions 17/1894 dead transitions. [2023-08-31 04:21:27,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 1894 transitions, 58180 flow [2023-08-31 04:21:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 04:21:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 04:21:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4497 transitions. [2023-08-31 04:21:27,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3410435310177461 [2023-08-31 04:21:27,039 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4497 transitions. [2023-08-31 04:21:27,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4497 transitions. [2023-08-31 04:21:27,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:27,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4497 transitions. [2023-08-31 04:21:27,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 118.34210526315789) internal successors, (4497), 38 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:27,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:27,048 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 347.0) internal successors, (13533), 39 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:27,048 INFO L175 Difference]: Start difference. First operand has 791 places, 1805 transitions, 53798 flow. Second operand 38 states and 4497 transitions. [2023-08-31 04:21:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 1894 transitions, 58180 flow [2023-08-31 04:21:33,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 1894 transitions, 57577 flow, removed 164 selfloop flow, removed 24 redundant places. [2023-08-31 04:21:33,054 INFO L231 Difference]: Finished difference. Result has 809 places, 1811 transitions, 53869 flow [2023-08-31 04:21:33,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53136, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=53869, PETRI_PLACES=809, PETRI_TRANSITIONS=1811} [2023-08-31 04:21:33,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2023-08-31 04:21:33,056 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 1811 transitions, 53869 flow [2023-08-31 04:21:33,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 114.65517241379311) internal successors, (3325), 29 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:33,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:33,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:33,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:33,257 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:21:33,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1457871291, now seen corresponding path program 16 times [2023-08-31 04:21:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329235178] [2023-08-31 04:21:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:33,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329235178] [2023-08-31 04:21:33,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329235178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:21:33,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116595673] [2023-08-31 04:21:33,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:21:33,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:33,413 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:21:33,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-31 04:21:33,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:21:33,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:21:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:21:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:33,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:21:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116595673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:21:33,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:21:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-31 04:21:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417181425] [2023-08-31 04:21:33,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:21:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 04:21:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 04:21:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-08-31 04:21:34,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:21:34,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 1811 transitions, 53869 flow. Second operand has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:34,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:34,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:21:34,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:42,361 INFO L130 PetriNetUnfolder]: 5832/11243 cut-off events. [2023-08-31 04:21:42,361 INFO L131 PetriNetUnfolder]: For 430755/430755 co-relation queries the response was YES. [2023-08-31 04:21:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128058 conditions, 11243 events. 5832/11243 cut-off events. For 430755/430755 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 96150 event pairs, 1741 based on Foata normal form. 48/11290 useless extension candidates. Maximal degree in co-relation 127491. Up to 9243 conditions per place. [2023-08-31 04:21:42,581 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1403 selfloop transitions, 490 changer transitions 0/1893 dead transitions. [2023-08-31 04:21:42,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 1893 transitions, 58522 flow [2023-08-31 04:21:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:21:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:21:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3253 transitions. [2023-08-31 04:21:42,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40759303345445436 [2023-08-31 04:21:42,583 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3253 transitions. [2023-08-31 04:21:42,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3253 transitions. [2023-08-31 04:21:42,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:42,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3253 transitions. [2023-08-31 04:21:42,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 141.43478260869566) internal successors, (3253), 23 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:42,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:42,589 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:42,589 INFO L175 Difference]: Start difference. First operand has 809 places, 1811 transitions, 53869 flow. Second operand 23 states and 3253 transitions. [2023-08-31 04:21:42,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 1893 transitions, 58522 flow [2023-08-31 04:21:49,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 1893 transitions, 58191 flow, removed 56 selfloop flow, removed 29 redundant places. [2023-08-31 04:21:49,380 INFO L231 Difference]: Finished difference. Result has 802 places, 1820 transitions, 54803 flow [2023-08-31 04:21:49,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53550, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54803, PETRI_PLACES=802, PETRI_TRANSITIONS=1820} [2023-08-31 04:21:49,382 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 781 predicate places. [2023-08-31 04:21:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1820 transitions, 54803 flow [2023-08-31 04:21:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:21:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:21:49,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-31 04:21:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:49,583 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:21:49,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:21:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1659375279, now seen corresponding path program 17 times [2023-08-31 04:21:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:21:49,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283078805] [2023-08-31 04:21:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:21:49,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:21:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:21:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:49,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:21:49,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283078805] [2023-08-31 04:21:49,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283078805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:21:49,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961710336] [2023-08-31 04:21:49,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:21:49,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:21:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:21:49,724 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:21:49,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-31 04:21:49,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:21:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:21:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:21:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:21:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:49,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:21:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:21:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961710336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:21:50,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:21:50,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-31 04:21:50,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394805332] [2023-08-31 04:21:50,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:21:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:21:50,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:21:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:21:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:21:50,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:21:50,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1820 transitions, 54803 flow. Second operand has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:50,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:21:50,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:21:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:21:59,466 INFO L130 PetriNetUnfolder]: 5927/11474 cut-off events. [2023-08-31 04:21:59,466 INFO L131 PetriNetUnfolder]: For 439158/439158 co-relation queries the response was YES. [2023-08-31 04:21:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131665 conditions, 11474 events. 5927/11474 cut-off events. For 439158/439158 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 99052 event pairs, 1703 based on Foata normal form. 48/11521 useless extension candidates. Maximal degree in co-relation 131098. Up to 9159 conditions per place. [2023-08-31 04:21:59,690 INFO L137 encePairwiseOnDemand]: 341/347 looper letters, 1418 selfloop transitions, 555 changer transitions 0/1973 dead transitions. [2023-08-31 04:21:59,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 1973 transitions, 61142 flow [2023-08-31 04:21:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:21:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:21:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4109 transitions. [2023-08-31 04:21:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083275365199245 [2023-08-31 04:21:59,693 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4109 transitions. [2023-08-31 04:21:59,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4109 transitions. [2023-08-31 04:21:59,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:21:59,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4109 transitions. [2023-08-31 04:21:59,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 141.68965517241378) internal successors, (4109), 29 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:59,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:59,700 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 347.0) internal successors, (10410), 30 states have internal predecessors, (10410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:21:59,700 INFO L175 Difference]: Start difference. First operand has 802 places, 1820 transitions, 54803 flow. Second operand 29 states and 4109 transitions. [2023-08-31 04:21:59,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 1973 transitions, 61142 flow [2023-08-31 04:22:06,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 1973 transitions, 60357 flow, removed 69 selfloop flow, removed 15 redundant places. [2023-08-31 04:22:06,217 INFO L231 Difference]: Finished difference. Result has 821 places, 1861 transitions, 56862 flow [2023-08-31 04:22:06,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=53827, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=56862, PETRI_PLACES=821, PETRI_TRANSITIONS=1861} [2023-08-31 04:22:06,219 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 800 predicate places. [2023-08-31 04:22:06,219 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 1861 transitions, 56862 flow [2023-08-31 04:22:06,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.93333333333334) internal successors, (2069), 15 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:06,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:06,219 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:06,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-31 04:22:06,420 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:22:06,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1701277171, now seen corresponding path program 18 times [2023-08-31 04:22:06,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339300776] [2023-08-31 04:22:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:06,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:06,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339300776] [2023-08-31 04:22:06,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339300776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:22:06,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041957929] [2023-08-31 04:22:06,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:22:06,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:06,618 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:06,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-31 04:22:06,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:22:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:22:06,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:22:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041957929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:22:07,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:22:07,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:22:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839032078] [2023-08-31 04:22:07,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:22:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:22:07,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:22:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:22:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:22:07,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 1861 transitions, 56862 flow. Second operand has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:07,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:07,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:22:07,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:16,615 INFO L130 PetriNetUnfolder]: 6280/12112 cut-off events. [2023-08-31 04:22:16,616 INFO L131 PetriNetUnfolder]: For 487959/487959 co-relation queries the response was YES. [2023-08-31 04:22:16,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140733 conditions, 12112 events. 6280/12112 cut-off events. For 487959/487959 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 105082 event pairs, 497 based on Foata normal form. 48/12159 useless extension candidates. Maximal degree in co-relation 140290. Up to 5388 conditions per place. [2023-08-31 04:22:17,031 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 897 selfloop transitions, 1240 changer transitions 0/2137 dead transitions. [2023-08-31 04:22:17,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 2137 transitions, 66690 flow [2023-08-31 04:22:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 04:22:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 04:22:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5254 transitions. [2023-08-31 04:22:17,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092219020172911 [2023-08-31 04:22:17,035 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5254 transitions. [2023-08-31 04:22:17,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5254 transitions. [2023-08-31 04:22:17,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:17,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5254 transitions. [2023-08-31 04:22:17,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 142.0) internal successors, (5254), 37 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,044 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:17,044 INFO L175 Difference]: Start difference. First operand has 821 places, 1861 transitions, 56862 flow. Second operand 37 states and 5254 transitions. [2023-08-31 04:22:17,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 2137 transitions, 66690 flow [2023-08-31 04:22:24,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 2137 transitions, 65804 flow, removed 119 selfloop flow, removed 15 redundant places. [2023-08-31 04:22:24,246 INFO L231 Difference]: Finished difference. Result has 851 places, 1988 transitions, 64270 flow [2023-08-31 04:22:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=55791, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=64270, PETRI_PLACES=851, PETRI_TRANSITIONS=1988} [2023-08-31 04:22:24,248 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 830 predicate places. [2023-08-31 04:22:24,248 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 1988 transitions, 64270 flow [2023-08-31 04:22:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:24,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:24,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-31 04:22:24,449 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:22:24,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:24,449 INFO L85 PathProgramCache]: Analyzing trace with hash 202869541, now seen corresponding path program 25 times [2023-08-31 04:22:24,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:24,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889442436] [2023-08-31 04:22:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:24,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:22:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:25,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889442436] [2023-08-31 04:22:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889442436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:22:25,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136525028] [2023-08-31 04:22:25,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:22:25,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:25,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:25,062 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:25,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-31 04:22:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-31 04:22:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:25,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:22:25,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:22:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:22:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:25,952 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:22:25,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:22:26,071 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:22:26,071 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 35 treesize of output 74 [2023-08-31 04:22:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136525028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:22:26,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:22:26,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 26 [2023-08-31 04:22:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753041155] [2023-08-31 04:22:26,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:22:26,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-31 04:22:26,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:26,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-31 04:22:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-08-31 04:22:28,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 347 [2023-08-31 04:22:28,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 851 places, 1988 transitions, 64270 flow. Second operand has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:28,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:28,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 347 [2023-08-31 04:22:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:39,540 INFO L130 PetriNetUnfolder]: 6335/12214 cut-off events. [2023-08-31 04:22:39,540 INFO L131 PetriNetUnfolder]: For 540667/540667 co-relation queries the response was YES. [2023-08-31 04:22:39,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148987 conditions, 12214 events. 6335/12214 cut-off events. For 540667/540667 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 105927 event pairs, 843 based on Foata normal form. 5/12218 useless extension candidates. Maximal degree in co-relation 148396. Up to 11770 conditions per place. [2023-08-31 04:22:39,788 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1930 selfloop transitions, 144 changer transitions 11/2085 dead transitions. [2023-08-31 04:22:39,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 2085 transitions, 69627 flow [2023-08-31 04:22:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:22:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:22:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3799 transitions. [2023-08-31 04:22:39,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531653806823464 [2023-08-31 04:22:39,791 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3799 transitions. [2023-08-31 04:22:39,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3799 transitions. [2023-08-31 04:22:39,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:39,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3799 transitions. [2023-08-31 04:22:39,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 122.54838709677419) internal successors, (3799), 31 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:39,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:39,799 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:39,799 INFO L175 Difference]: Start difference. First operand has 851 places, 1988 transitions, 64270 flow. Second operand 31 states and 3799 transitions. [2023-08-31 04:22:39,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 2085 transitions, 69627 flow [2023-08-31 04:22:48,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 2085 transitions, 68584 flow, removed 191 selfloop flow, removed 19 redundant places. [2023-08-31 04:22:48,609 INFO L231 Difference]: Finished difference. Result has 872 places, 2008 transitions, 64312 flow [2023-08-31 04:22:48,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63236, PETRI_DIFFERENCE_MINUEND_PLACES=832, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=64312, PETRI_PLACES=872, PETRI_TRANSITIONS=2008} [2023-08-31 04:22:48,611 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-08-31 04:22:48,611 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2008 transitions, 64312 flow [2023-08-31 04:22:48,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 118.85714285714286) internal successors, (3328), 28 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:48,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:22:48,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:22:48,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-31 04:22:48,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-31 04:22:48,813 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:22:48,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:22:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash -542954565, now seen corresponding path program 19 times [2023-08-31 04:22:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:22:48,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048170211] [2023-08-31 04:22:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:22:48,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:22:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:22:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048170211] [2023-08-31 04:22:48,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048170211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:22:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801241993] [2023-08-31 04:22:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:22:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:22:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:22:48,945 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:22:48,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-31 04:22:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:22:49,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 04:22:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:22:49,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-08-31 04:22:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:49,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:22:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:22:49,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801241993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:22:49,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:22:49,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-31 04:22:49,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122092307] [2023-08-31 04:22:49,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:22:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:22:49,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:22:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:22:49,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:22:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 347 [2023-08-31 04:22:49,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2008 transitions, 64312 flow. Second operand has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:49,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:22:49,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 347 [2023-08-31 04:22:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:22:59,097 INFO L130 PetriNetUnfolder]: 6325/12149 cut-off events. [2023-08-31 04:22:59,097 INFO L131 PetriNetUnfolder]: For 559870/559870 co-relation queries the response was YES. [2023-08-31 04:22:59,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147987 conditions, 12149 events. 6325/12149 cut-off events. For 559870/559870 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105218 event pairs, 494 based on Foata normal form. 12/12160 useless extension candidates. Maximal degree in co-relation 147389. Up to 5407 conditions per place. [2023-08-31 04:22:59,352 INFO L137 encePairwiseOnDemand]: 340/347 looper letters, 899 selfloop transitions, 1226 changer transitions 0/2125 dead transitions. [2023-08-31 04:22:59,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2125 transitions, 70310 flow [2023-08-31 04:22:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:22:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:22:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3295 transitions. [2023-08-31 04:22:59,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41285553188823454 [2023-08-31 04:22:59,355 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3295 transitions. [2023-08-31 04:22:59,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3295 transitions. [2023-08-31 04:22:59,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:22:59,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3295 transitions. [2023-08-31 04:22:59,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.2608695652174) internal successors, (3295), 23 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:59,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:59,360 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 347.0) internal successors, (8328), 24 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:22:59,360 INFO L175 Difference]: Start difference. First operand has 872 places, 2008 transitions, 64312 flow. Second operand 23 states and 3295 transitions. [2023-08-31 04:22:59,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 2125 transitions, 70310 flow [2023-08-31 04:23:07,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 2125 transitions, 69887 flow, removed 128 selfloop flow, removed 22 redundant places. [2023-08-31 04:23:07,986 INFO L231 Difference]: Finished difference. Result has 872 places, 2012 transitions, 66997 flow [2023-08-31 04:23:07,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=63797, PETRI_DIFFERENCE_MINUEND_PLACES=848, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=66997, PETRI_PLACES=872, PETRI_TRANSITIONS=2012} [2023-08-31 04:23:07,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 851 predicate places. [2023-08-31 04:23:07,987 INFO L495 AbstractCegarLoop]: Abstraction has has 872 places, 2012 transitions, 66997 flow [2023-08-31 04:23:07,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 137.75) internal successors, (2204), 16 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:07,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:23:07,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:23:07,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-31 04:23:08,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-31 04:23:08,188 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:23:08,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:23:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1368375569, now seen corresponding path program 26 times [2023-08-31 04:23:08,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:23:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456489866] [2023-08-31 04:23:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:23:08,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:23:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:23:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:23:09,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:23:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456489866] [2023-08-31 04:23:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456489866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:23:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798515969] [2023-08-31 04:23:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:23:09,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:23:09,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:23:09,171 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:23:09,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-31 04:23:09,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:23:09,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:23:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:23:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:23:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:23:09,460 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 [2023-08-31 04:23:09,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:09,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:23:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:23:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:23:10,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:10,299 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 76 treesize of output 108 [2023-08-31 04:23:10,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:10,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-31 04:23:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:23:10,407 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:23:10,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:23:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:23:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798515969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:23:10,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:23:10,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 32 [2023-08-31 04:23:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726364209] [2023-08-31 04:23:10,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:23:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-31 04:23:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:23:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-31 04:23:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1011, Unknown=1, NotChecked=0, Total=1122 [2023-08-31 04:23:14,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:23:14,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 872 places, 2012 transitions, 66997 flow. Second operand has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:14,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:23:14,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:23:14,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:23:26,760 INFO L130 PetriNetUnfolder]: 6373/12242 cut-off events. [2023-08-31 04:23:26,761 INFO L131 PetriNetUnfolder]: For 584638/584638 co-relation queries the response was YES. [2023-08-31 04:23:26,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154050 conditions, 12242 events. 6373/12242 cut-off events. For 584638/584638 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 105831 event pairs, 609 based on Foata normal form. 5/12246 useless extension candidates. Maximal degree in co-relation 153448. Up to 10994 conditions per place. [2023-08-31 04:23:27,013 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1749 selfloop transitions, 371 changer transitions 13/2133 dead transitions. [2023-08-31 04:23:27,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 908 places, 2133 transitions, 72600 flow [2023-08-31 04:23:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 04:23:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 04:23:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3365 transitions. [2023-08-31 04:23:27,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.262092063244801 [2023-08-31 04:23:27,016 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3365 transitions. [2023-08-31 04:23:27,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3365 transitions. [2023-08-31 04:23:27,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:23:27,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3365 transitions. [2023-08-31 04:23:27,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.94594594594595) internal successors, (3365), 37 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:27,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:27,024 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 347.0) internal successors, (13186), 38 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:27,024 INFO L175 Difference]: Start difference. First operand has 872 places, 2012 transitions, 66997 flow. Second operand 37 states and 3365 transitions. [2023-08-31 04:23:27,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 908 places, 2133 transitions, 72600 flow [2023-08-31 04:23:35,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 2133 transitions, 71890 flow, removed 29 selfloop flow, removed 13 redundant places. [2023-08-31 04:23:36,013 INFO L231 Difference]: Finished difference. Result has 901 places, 2025 transitions, 67617 flow [2023-08-31 04:23:36,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66299, PETRI_DIFFERENCE_MINUEND_PLACES=859, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=67617, PETRI_PLACES=901, PETRI_TRANSITIONS=2025} [2023-08-31 04:23:36,015 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 880 predicate places. [2023-08-31 04:23:36,015 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 2025 transitions, 67617 flow [2023-08-31 04:23:36,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 86.52941176470588) internal successors, (2942), 34 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:36,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:23:36,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:23:36,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-31 04:23:36,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-31 04:23:36,222 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:23:36,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:23:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1059376025, now seen corresponding path program 27 times [2023-08-31 04:23:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:23:36,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567693292] [2023-08-31 04:23:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:23:36,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:23:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:23:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:23:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:23:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567693292] [2023-08-31 04:23:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567693292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:23:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531377028] [2023-08-31 04:23:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:23:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:23:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:23:37,041 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:23:37,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-31 04:23:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:23:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:23:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:23:37,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:23:37,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:23:37,346 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 [2023-08-31 04:23:37,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:37,492 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 160 treesize of output 118 [2023-08-31 04:23:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:23:37,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:23:38,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:38,230 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 76 treesize of output 108 [2023-08-31 04:23:38,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:23:38,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-31 04:23:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:23:38,338 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:23:38,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:23:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:23:38,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531377028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:23:38,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:23:38,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-31 04:23:38,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412300712] [2023-08-31 04:23:38,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:23:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:23:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:23:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:23:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=919, Unknown=2, NotChecked=0, Total=1056 [2023-08-31 04:23:40,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 347 [2023-08-31 04:23:40,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 2025 transitions, 67617 flow. Second operand has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:40,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:23:40,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 347 [2023-08-31 04:23:40,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:23:55,916 INFO L130 PetriNetUnfolder]: 6362/12213 cut-off events. [2023-08-31 04:23:55,916 INFO L131 PetriNetUnfolder]: For 598358/598358 co-relation queries the response was YES. [2023-08-31 04:23:56,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154734 conditions, 12213 events. 6362/12213 cut-off events. For 598358/598358 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 105465 event pairs, 617 based on Foata normal form. 6/12218 useless extension candidates. Maximal degree in co-relation 154120. Up to 10960 conditions per place. [2023-08-31 04:23:56,172 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1744 selfloop transitions, 360 changer transitions 15/2119 dead transitions. [2023-08-31 04:23:56,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2119 transitions, 72797 flow [2023-08-31 04:23:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 04:23:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 04:23:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3089 transitions. [2023-08-31 04:23:56,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697580997292813 [2023-08-31 04:23:56,175 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3089 transitions. [2023-08-31 04:23:56,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3089 transitions. [2023-08-31 04:23:56,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:23:56,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3089 transitions. [2023-08-31 04:23:56,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 93.60606060606061) internal successors, (3089), 33 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:56,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:56,182 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 347.0) internal successors, (11798), 34 states have internal predecessors, (11798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:23:56,182 INFO L175 Difference]: Start difference. First operand has 901 places, 2025 transitions, 67617 flow. Second operand 33 states and 3089 transitions. [2023-08-31 04:23:56,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2119 transitions, 72797 flow [2023-08-31 04:24:05,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 899 places, 2119 transitions, 72051 flow, removed 101 selfloop flow, removed 34 redundant places. [2023-08-31 04:24:05,689 INFO L231 Difference]: Finished difference. Result has 904 places, 2034 transitions, 68035 flow [2023-08-31 04:24:05,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=66806, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=68035, PETRI_PLACES=904, PETRI_TRANSITIONS=2034} [2023-08-31 04:24:05,690 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 883 predicate places. [2023-08-31 04:24:05,691 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2034 transitions, 68035 flow [2023-08-31 04:24:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 89.45454545454545) internal successors, (2952), 33 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:05,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:24:05,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:24:05,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-31 04:24:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-31 04:24:05,893 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:24:05,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:24:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1095038279, now seen corresponding path program 28 times [2023-08-31 04:24:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:24:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082871708] [2023-08-31 04:24:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:24:05,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:24:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:24:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:24:06,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:24:06,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082871708] [2023-08-31 04:24:06,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082871708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:24:06,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803439739] [2023-08-31 04:24:06,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:24:06,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:24:06,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:24:06,813 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:24:06,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-31 04:24:06,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:24:06,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:24:06,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-31 04:24:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:24:07,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:24:07,109 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 [2023-08-31 04:24:07,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:07,329 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 160 treesize of output 118 [2023-08-31 04:24:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:24:07,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:24:08,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:08,121 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 114 [2023-08-31 04:24:08,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:08,135 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-31 04:24:08,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:24:08,236 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:24:08,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:24:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:24:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803439739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:24:08,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:24:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-31 04:24:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342799813] [2023-08-31 04:24:08,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:24:08,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:24:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:24:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:24:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=921, Unknown=1, NotChecked=0, Total=1056 [2023-08-31 04:24:09,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:24:09,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2034 transitions, 68035 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:24:09,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:24:09,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:24:09,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:24:19,719 INFO L130 PetriNetUnfolder]: 6416/12293 cut-off events. [2023-08-31 04:24:19,720 INFO L131 PetriNetUnfolder]: For 589171/589171 co-relation queries the response was YES. [2023-08-31 04:24:19,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155457 conditions, 12293 events. 6416/12293 cut-off events. For 589171/589171 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 105718 event pairs, 799 based on Foata normal form. 6/12298 useless extension candidates. Maximal degree in co-relation 154847. Up to 11706 conditions per place. [2023-08-31 04:24:19,980 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1911 selfloop transitions, 206 changer transitions 11/2128 dead transitions. [2023-08-31 04:24:19,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 2128 transitions, 73750 flow [2023-08-31 04:24:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:24:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:24:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3058 transitions. [2023-08-31 04:24:19,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25919647397864043 [2023-08-31 04:24:19,983 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3058 transitions. [2023-08-31 04:24:19,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3058 transitions. [2023-08-31 04:24:19,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:24:19,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3058 transitions. [2023-08-31 04:24:19,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.94117647058823) internal successors, (3058), 34 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:19,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:19,990 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:19,990 INFO L175 Difference]: Start difference. First operand has 904 places, 2034 transitions, 68035 flow. Second operand 34 states and 3058 transitions. [2023-08-31 04:24:19,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 2128 transitions, 73750 flow [2023-08-31 04:24:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 906 places, 2128 transitions, 73191 flow, removed 61 selfloop flow, removed 27 redundant places. [2023-08-31 04:24:29,138 INFO L231 Difference]: Finished difference. Result has 915 places, 2060 transitions, 69099 flow [2023-08-31 04:24:29,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=67454, PETRI_DIFFERENCE_MINUEND_PLACES=873, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=69099, PETRI_PLACES=915, PETRI_TRANSITIONS=2060} [2023-08-31 04:24:29,140 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 894 predicate places. [2023-08-31 04:24:29,141 INFO L495 AbstractCegarLoop]: Abstraction has has 915 places, 2060 transitions, 69099 flow [2023-08-31 04:24:29,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:24:29,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:24:29,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:24:29,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-31 04:24:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:24:29,347 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:24:29,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:24:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1094443633, now seen corresponding path program 29 times [2023-08-31 04:24:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:24:29,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461115768] [2023-08-31 04:24:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:24:29,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:24:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:24:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:24:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:24:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461115768] [2023-08-31 04:24:30,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461115768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:24:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932304741] [2023-08-31 04:24:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:24:30,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:24:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:24:30,340 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:24:30,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-31 04:24:30,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:24:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:24:30,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:24:30,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:24:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:24:30,632 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 [2023-08-31 04:24:31,096 INFO L321 Elim1Store]: treesize reduction 68, result has 63.2 percent of original size [2023-08-31 04:24:31,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 104 treesize of output 188 [2023-08-31 04:24:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:24:32,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:24:33,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:33,555 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 114 [2023-08-31 04:24:33,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:33,570 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-31 04:24:33,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:24:33,685 INFO L321 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-31 04:24:33,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 61 [2023-08-31 04:24:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:24:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932304741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:24:33,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:24:33,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-31 04:24:33,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124168609] [2023-08-31 04:24:33,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:24:33,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:24:33,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:24:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:24:33,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=938, Unknown=2, NotChecked=0, Total=1056 [2023-08-31 04:24:36,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:24:36,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 915 places, 2060 transitions, 69099 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:24:36,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:24:36,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:24:36,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:24:47,834 INFO L130 PetriNetUnfolder]: 6414/12280 cut-off events. [2023-08-31 04:24:47,834 INFO L131 PetriNetUnfolder]: For 589995/589995 co-relation queries the response was YES. [2023-08-31 04:24:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155840 conditions, 12280 events. 6414/12280 cut-off events. For 589995/589995 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 105344 event pairs, 805 based on Foata normal form. 1/12280 useless extension candidates. Maximal degree in co-relation 155225. Up to 11803 conditions per place. [2023-08-31 04:24:48,091 INFO L137 encePairwiseOnDemand]: 337/347 looper letters, 1901 selfloop transitions, 199 changer transitions 6/2106 dead transitions. [2023-08-31 04:24:48,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 2106 transitions, 73589 flow [2023-08-31 04:24:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 04:24:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 04:24:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2774 transitions. [2023-08-31 04:24:48,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25787859068513524 [2023-08-31 04:24:48,093 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2774 transitions. [2023-08-31 04:24:48,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2774 transitions. [2023-08-31 04:24:48,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:24:48,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2774 transitions. [2023-08-31 04:24:48,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.48387096774194) internal successors, (2774), 31 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:48,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:48,099 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 347.0) internal successors, (11104), 32 states have internal predecessors, (11104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:24:48,100 INFO L175 Difference]: Start difference. First operand has 915 places, 2060 transitions, 69099 flow. Second operand 31 states and 2774 transitions. [2023-08-31 04:24:48,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 2106 transitions, 73589 flow [2023-08-31 04:24:57,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 2106 transitions, 73149 flow, removed 121 selfloop flow, removed 24 redundant places. [2023-08-31 04:24:57,741 INFO L231 Difference]: Finished difference. Result has 922 places, 2062 transitions, 69164 flow [2023-08-31 04:24:57,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68659, PETRI_DIFFERENCE_MINUEND_PLACES=889, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69164, PETRI_PLACES=922, PETRI_TRANSITIONS=2062} [2023-08-31 04:24:57,743 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 901 predicate places. [2023-08-31 04:24:57,743 INFO L495 AbstractCegarLoop]: Abstraction has has 922 places, 2062 transitions, 69164 flow [2023-08-31 04:24:57,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:24:57,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:24:57,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:24:57,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-31 04:24:57,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:24:57,949 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:24:57,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:24:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -788944561, now seen corresponding path program 30 times [2023-08-31 04:24:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:24:57,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964294770] [2023-08-31 04:24:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:24:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:24:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:24:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:24:58,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:24:58,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964294770] [2023-08-31 04:24:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964294770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:24:58,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006963159] [2023-08-31 04:24:58,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:24:58,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:24:58,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:24:58,620 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:24:58,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-31 04:24:58,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 04:24:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:24:58,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:24:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:24:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:24:58,889 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 [2023-08-31 04:24:59,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:59,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-31 04:24:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:24:59,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:24:59,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:59,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 131 treesize of output 195 [2023-08-31 04:24:59,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:24:59,690 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 51 treesize of output 95 [2023-08-31 04:25:00,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:25:00,037 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 114 [2023-08-31 04:25:00,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:25:00,053 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-31 04:25:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:25:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006963159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:25:00,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:25:00,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-31 04:25:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083482978] [2023-08-31 04:25:00,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:25:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-31 04:25:00,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:25:00,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-31 04:25:00,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=930, Unknown=2, NotChecked=0, Total=1056 [2023-08-31 04:25:03,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:25:03,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 922 places, 2062 transitions, 69164 flow. Second operand has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:25:03,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:25:03,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:25:03,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:25:14,752 INFO L130 PetriNetUnfolder]: 6414/12285 cut-off events. [2023-08-31 04:25:14,753 INFO L131 PetriNetUnfolder]: For 584533/584533 co-relation queries the response was YES. [2023-08-31 04:25:14,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155688 conditions, 12285 events. 6414/12285 cut-off events. For 584533/584533 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 105605 event pairs, 832 based on Foata normal form. 4/12288 useless extension candidates. Maximal degree in co-relation 155070. Up to 11696 conditions per place. [2023-08-31 04:25:15,014 INFO L137 encePairwiseOnDemand]: 336/347 looper letters, 1905 selfloop transitions, 218 changer transitions 13/2136 dead transitions. [2023-08-31 04:25:15,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 955 places, 2136 transitions, 73896 flow [2023-08-31 04:25:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 04:25:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 04:25:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3152 transitions. [2023-08-31 04:25:15,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25953067105804856 [2023-08-31 04:25:15,018 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3152 transitions. [2023-08-31 04:25:15,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3152 transitions. [2023-08-31 04:25:15,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:25:15,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3152 transitions. [2023-08-31 04:25:15,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.05714285714286) internal successors, (3152), 35 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:15,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:15,025 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 347.0) internal successors, (12492), 36 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:15,025 INFO L175 Difference]: Start difference. First operand has 922 places, 2062 transitions, 69164 flow. Second operand 35 states and 3152 transitions. [2023-08-31 04:25:15,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 955 places, 2136 transitions, 73896 flow [2023-08-31 04:25:24,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 929 places, 2136 transitions, 73533 flow, removed 24 selfloop flow, removed 26 redundant places. [2023-08-31 04:25:24,197 INFO L231 Difference]: Finished difference. Result has 932 places, 2060 transitions, 69239 flow [2023-08-31 04:25:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68801, PETRI_DIFFERENCE_MINUEND_PLACES=895, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2062, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=69239, PETRI_PLACES=932, PETRI_TRANSITIONS=2060} [2023-08-31 04:25:24,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 911 predicate places. [2023-08-31 04:25:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 932 places, 2060 transitions, 69239 flow [2023-08-31 04:25:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 86.45454545454545) internal successors, (2853), 33 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) [2023-08-31 04:25:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:25:24,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:25:24,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-31 04:25:24,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:25:24,400 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:25:24,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:25:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1095631957, now seen corresponding path program 31 times [2023-08-31 04:25:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:25:24,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071574290] [2023-08-31 04:25:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:25:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:25:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:25:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:25:25,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:25:25,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071574290] [2023-08-31 04:25:25,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071574290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:25:25,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634522412] [2023-08-31 04:25:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:25:25,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:25:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:25:25,498 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:25:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-31 04:25:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:25:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-31 04:25:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:25:25,694 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 [2023-08-31 04:25:25,732 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 [2023-08-31 04:25:25,766 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 [2023-08-31 04:25:26,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:25:26,043 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 [2023-08-31 04:25:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:25:26,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:25:26,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:25:26,929 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 380 treesize of output 224 [2023-08-31 04:25:27,117 INFO L321 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-08-31 04:25:27,117 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 570 treesize of output 637 [2023-08-31 04:25:27,307 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-08-31 04:25:27,307 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 458 treesize of output 466 [2023-08-31 04:25:27,514 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-08-31 04:25:27,514 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 185 treesize of output 277 [2023-08-31 04:25:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:25:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634522412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:25:32,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:25:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-31 04:25:32,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402254946] [2023-08-31 04:25:32,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:25:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-31 04:25:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:25:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-31 04:25:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1053, Unknown=3, NotChecked=0, Total=1260 [2023-08-31 04:25:36,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:25:36,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 932 places, 2060 transitions, 69239 flow. Second operand has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:36,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:25:36,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:25:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:25:56,457 INFO L130 PetriNetUnfolder]: 7174/13644 cut-off events. [2023-08-31 04:25:56,458 INFO L131 PetriNetUnfolder]: For 668333/668333 co-relation queries the response was YES. [2023-08-31 04:25:56,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174908 conditions, 13644 events. 7174/13644 cut-off events. For 668333/668333 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 118634 event pairs, 141 based on Foata normal form. 5/13648 useless extension candidates. Maximal degree in co-relation 174290. Up to 9243 conditions per place. [2023-08-31 04:25:56,856 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 1607 selfloop transitions, 922 changer transitions 23/2552 dead transitions. [2023-08-31 04:25:56,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1008 places, 2552 transitions, 85873 flow [2023-08-31 04:25:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-31 04:25:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-31 04:25:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 7117 transitions. [2023-08-31 04:25:56,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25962134753584065 [2023-08-31 04:25:56,862 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 7117 transitions. [2023-08-31 04:25:56,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 7117 transitions. [2023-08-31 04:25:56,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:25:56,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 7117 transitions. [2023-08-31 04:25:56,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 90.0886075949367) internal successors, (7117), 79 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:56,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 347.0) internal successors, (27760), 80 states have internal predecessors, (27760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:56,878 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 347.0) internal successors, (27760), 80 states have internal predecessors, (27760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:25:56,878 INFO L175 Difference]: Start difference. First operand has 932 places, 2060 transitions, 69239 flow. Second operand 79 states and 7117 transitions. [2023-08-31 04:25:56,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1008 places, 2552 transitions, 85873 flow [2023-08-31 04:26:08,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 976 places, 2552 transitions, 85359 flow, removed 28 selfloop flow, removed 32 redundant places. [2023-08-31 04:26:08,074 INFO L231 Difference]: Finished difference. Result has 1005 places, 2348 transitions, 82062 flow [2023-08-31 04:26:08,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=68787, PETRI_DIFFERENCE_MINUEND_PLACES=898, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=82062, PETRI_PLACES=1005, PETRI_TRANSITIONS=2348} [2023-08-31 04:26:08,077 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 984 predicate places. [2023-08-31 04:26:08,077 INFO L495 AbstractCegarLoop]: Abstraction has has 1005 places, 2348 transitions, 82062 flow [2023-08-31 04:26:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 86.38888888888889) internal successors, (3110), 36 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:26:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:26:08,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-31 04:26:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:26:08,284 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:26:08,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:26:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash -699103046, now seen corresponding path program 32 times [2023-08-31 04:26:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:26:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087362163] [2023-08-31 04:26:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:26:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:26:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:26:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:26:09,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:26:09,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087362163] [2023-08-31 04:26:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087362163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:26:09,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298371784] [2023-08-31 04:26:09,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:26:09,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:26:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:26:09,311 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:26:09,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-31 04:26:09,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:26:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:26:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-31 04:26:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:26:09,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:26:09,704 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 160 treesize of output 118 [2023-08-31 04:26:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:26:09,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:26:10,325 INFO L321 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-31 04:26:10,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 63 treesize of output 125 [2023-08-31 04:26:10,436 INFO L321 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-31 04:26:10,437 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 35 treesize of output 74 [2023-08-31 04:26:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-31 04:26:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298371784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:26:10,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:26:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 29 [2023-08-31 04:26:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945406065] [2023-08-31 04:26:10,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:26:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 04:26:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:26:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 04:26:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-08-31 04:26:14,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 347 [2023-08-31 04:26:14,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 2348 transitions, 82062 flow. Second operand has 31 states, 31 states have (on average 115.61290322580645) internal successors, (3584), 31 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:14,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:26:14,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 347 [2023-08-31 04:26:14,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:26:26,946 INFO L130 PetriNetUnfolder]: 7310/13865 cut-off events. [2023-08-31 04:26:26,946 INFO L131 PetriNetUnfolder]: For 771982/771982 co-relation queries the response was YES. [2023-08-31 04:26:27,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186728 conditions, 13865 events. 7310/13865 cut-off events. For 771982/771982 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 120192 event pairs, 1007 based on Foata normal form. 10/13873 useless extension candidates. Maximal degree in co-relation 186384. Up to 13317 conditions per place. [2023-08-31 04:26:27,269 INFO L137 encePairwiseOnDemand]: 335/347 looper letters, 2293 selfloop transitions, 202 changer transitions 13/2508 dead transitions. [2023-08-31 04:26:27,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1034 places, 2508 transitions, 90450 flow [2023-08-31 04:26:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:26:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:26:27,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4067 transitions. [2023-08-31 04:26:27,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34471944397355486 [2023-08-31 04:26:27,272 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4067 transitions. [2023-08-31 04:26:27,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4067 transitions. [2023-08-31 04:26:27,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:26:27,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4067 transitions. [2023-08-31 04:26:27,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 119.61764705882354) internal successors, (4067), 34 states have internal predecessors, (4067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:27,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:27,279 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 347.0) internal successors, (12145), 35 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:27,279 INFO L175 Difference]: Start difference. First operand has 1005 places, 2348 transitions, 82062 flow. Second operand 34 states and 4067 transitions. [2023-08-31 04:26:27,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1034 places, 2508 transitions, 90450 flow [2023-08-31 04:26:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1004 places, 2508 transitions, 88952 flow, removed 492 selfloop flow, removed 30 redundant places. [2023-08-31 04:26:41,945 INFO L231 Difference]: Finished difference. Result has 1015 places, 2418 transitions, 83889 flow [2023-08-31 04:26:41,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=80475, PETRI_DIFFERENCE_MINUEND_PLACES=971, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=83889, PETRI_PLACES=1015, PETRI_TRANSITIONS=2418} [2023-08-31 04:26:41,947 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 994 predicate places. [2023-08-31 04:26:41,947 INFO L495 AbstractCegarLoop]: Abstraction has has 1015 places, 2418 transitions, 83889 flow [2023-08-31 04:26:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 115.61290322580645) internal successors, (3584), 31 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:41,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:26:41,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:26:41,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-31 04:26:42,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-08-31 04:26:42,148 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:26:42,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:26:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1209929323, now seen corresponding path program 33 times [2023-08-31 04:26:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:26:42,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843151187] [2023-08-31 04:26:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:26:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:26:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:26:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:26:43,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:26:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843151187] [2023-08-31 04:26:43,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843151187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:26:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266949647] [2023-08-31 04:26:43,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:26:43,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:26:43,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:26:43,145 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:26:43,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-31 04:26:43,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:26:43,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:26:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-31 04:26:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:26:43,367 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 13 treesize of output 9 [2023-08-31 04:26:43,408 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 [2023-08-31 04:26:43,442 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 [2023-08-31 04:26:43,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:26:43,718 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 [2023-08-31 04:26:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:26:43,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:26:44,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:26:44,706 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 380 treesize of output 224 [2023-08-31 04:26:44,863 INFO L321 Elim1Store]: treesize reduction 5, result has 96.7 percent of original size [2023-08-31 04:26:44,864 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 1194 treesize of output 1149 [2023-08-31 04:26:45,028 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-08-31 04:26:45,028 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 269 treesize of output 277 [2023-08-31 04:26:45,754 INFO L321 Elim1Store]: treesize reduction 8, result has 94.8 percent of original size [2023-08-31 04:26:45,755 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 190 treesize of output 282 [2023-08-31 04:26:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:26:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266949647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:26:50,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:26:50,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-08-31 04:26:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754867797] [2023-08-31 04:26:50,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:26:50,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-31 04:26:50,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:26:50,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-31 04:26:50,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1028, Unknown=1, NotChecked=0, Total=1190 [2023-08-31 04:26:55,154 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] [2023-08-31 04:26:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 347 [2023-08-31 04:26:56,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1015 places, 2418 transitions, 83889 flow. Second operand has 35 states, 35 states have (on average 86.6) internal successors, (3031), 35 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:26:56,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:26:56,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 347 [2023-08-31 04:26:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15