./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:57:24,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:57:24,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:57:24,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:57:24,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:57:24,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:57:24,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:57:24,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:57:24,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:57:24,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:57:24,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:57:24,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:57:24,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:57:24,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:57:24,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:57:24,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:57:24,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:57:24,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:57:24,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:57:24,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:57:24,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:57:24,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:57:24,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:57:24,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:57:24,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:57:24,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:57:24,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:57:24,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:57:24,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:57:24,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:57:24,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:57:24,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:57:24,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:57:24,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:57:24,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:57:24,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:57:24,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:57:24,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:57:24,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:57:24,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:57:24,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:57:24,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:57:24,190 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:57:24,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:57:24,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:57:24,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:57:24,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:57:24,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:57:24,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:57:24,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:57:24,201 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:57:24,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:57:24,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:57:24,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:57:24,203 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:57:24,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:57:24,203 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:57:24,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:57:24,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:57:24,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:57:24,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:57:24,205 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:57:24,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:57:24,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:57:24,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:57:24,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:57:24,446 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:57:24,446 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:57:24,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-09-01 12:57:25,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:57:25,703 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:57:25,703 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-equiv.wvr.c [2023-09-01 12:57:25,709 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/788f697d8/120093e7403144998471e32b237df7e0/FLAG5bb5753f1 [2023-09-01 12:57:25,722 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/788f697d8/120093e7403144998471e32b237df7e0 [2023-09-01 12:57:25,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:57:25,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:57:25,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:57:25,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:57:25,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:57:25,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:25,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3901f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25, skipping insertion in model container [2023-09-01 12:57:25,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:25,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:57:25,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:57:25,899 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-09-01 12:57:25,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:57:25,924 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:57:25,964 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/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2023-09-01 12:57:25,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:57:25,979 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:57:25,980 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:57:25,986 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:57:25,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25 WrapperNode [2023-09-01 12:57:25,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:57:25,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:57:25,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:57:25,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:57:25,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,048 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 257 [2023-09-01 12:57:26,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:57:26,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:57:26,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:57:26,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:57:26,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,093 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:57:26,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:57:26,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:57:26,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:57:26,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (1/1) ... [2023-09-01 12:57:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:57:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:26,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 12:57:26,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 12:57:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:57:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:57:26,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:57:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:57:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:57:26,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:57:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:57:26,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:57:26,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 12:57:26,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 12:57:26,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:57:26,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:57:26,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:57:26,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:57:26,220 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:57:26,308 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:57:26,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:57:26,708 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:57:26,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:57:26,847 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 12:57:26,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:57:26 BoogieIcfgContainer [2023-09-01 12:57:26,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:57:26,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:57:26,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:57:26,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:57:26,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:57:25" (1/3) ... [2023-09-01 12:57:26,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487fa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:57:26, skipping insertion in model container [2023-09-01 12:57:26,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:57:25" (2/3) ... [2023-09-01 12:57:26,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487fa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:57:26, skipping insertion in model container [2023-09-01 12:57:26,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:57:26" (3/3) ... [2023-09-01 12:57:26,856 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2023-09-01 12:57:26,862 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:57:26,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:57:26,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:57:26,869 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:57:26,959 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-09-01 12:57:26,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 205 transitions, 454 flow [2023-09-01 12:57:27,084 INFO L130 PetriNetUnfolder]: 14/190 cut-off events. [2023-09-01 12:57:27,085 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:57:27,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 190 events. 14/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2023-09-01 12:57:27,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 205 transitions, 454 flow [2023-09-01 12:57:27,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 182 transitions, 394 flow [2023-09-01 12:57:27,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:57:27,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 182 transitions, 394 flow [2023-09-01 12:57:27,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 182 transitions, 394 flow [2023-09-01 12:57:27,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 182 transitions, 394 flow [2023-09-01 12:57:27,151 INFO L130 PetriNetUnfolder]: 14/182 cut-off events. [2023-09-01 12:57:27,155 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:57:27,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 182 events. 14/182 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2023-09-01 12:57:27,159 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-09-01 12:57:31,805 INFO L134 LiptonReduction]: Checked pairs total: 7881 [2023-09-01 12:57:31,805 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-09-01 12:57:31,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:57:31,824 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;@4c981e2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:57:31,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-09-01 12:57:31,830 INFO L130 PetriNetUnfolder]: 6/38 cut-off events. [2023-09-01 12:57:31,830 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:57:31,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:31,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:31,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:31,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1095116209, now seen corresponding path program 1 times [2023-09-01 12:57:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:31,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145653418] [2023-09-01 12:57:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:31,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:32,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:32,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145653418] [2023-09-01 12:57:32,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145653418] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:57:32,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:57:32,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:57:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696819925] [2023-09-01 12:57:32,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:57:32,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:57:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:57:32,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 372 [2023-09-01 12:57:32,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:32,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 372 [2023-09-01 12:57:32,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:32,629 INFO L130 PetriNetUnfolder]: 1658/2379 cut-off events. [2023-09-01 12:57:32,629 INFO L131 PetriNetUnfolder]: For 374/387 co-relation queries the response was YES. [2023-09-01 12:57:32,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 2379 events. 1658/2379 cut-off events. For 374/387 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9807 event pairs, 523 based on Foata normal form. 5/1793 useless extension candidates. Maximal degree in co-relation 5002. Up to 1081 conditions per place. [2023-09-01 12:57:32,640 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 67 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2023-09-01 12:57:32,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 396 flow [2023-09-01 12:57:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:57:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:57:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2023-09-01 12:57:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2023-09-01 12:57:32,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2023-09-01 12:57:32,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2023-09-01 12:57:32,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:32,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2023-09-01 12:57:32,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,684 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 752 transitions. [2023-09-01 12:57:32,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 396 flow [2023-09-01 12:57:32,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 84 transitions, 344 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 12:57:32,691 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 133 flow [2023-09-01 12:57:32,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-09-01 12:57:32,694 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-09-01 12:57:32,695 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 133 flow [2023-09-01 12:57:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:32,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:32,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:57:32,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:32,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 489950223, now seen corresponding path program 2 times [2023-09-01 12:57:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850820518] [2023-09-01 12:57:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850820518] [2023-09-01 12:57:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850820518] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:57:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:57:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:57:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794177055] [2023-09-01 12:57:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:32,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:57:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:57:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 12:57:32,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 372 [2023-09-01 12:57:32,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:32,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:32,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 372 [2023-09-01 12:57:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:33,114 INFO L130 PetriNetUnfolder]: 2346/3398 cut-off events. [2023-09-01 12:57:33,115 INFO L131 PetriNetUnfolder]: For 760/760 co-relation queries the response was YES. [2023-09-01 12:57:33,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8017 conditions, 3398 events. 2346/3398 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15085 event pairs, 975 based on Foata normal form. 1/2822 useless extension candidates. Maximal degree in co-relation 3909. Up to 1875 conditions per place. [2023-09-01 12:57:33,130 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 71 selfloop transitions, 8 changer transitions 1/89 dead transitions. [2023-09-01 12:57:33,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 416 flow [2023-09-01 12:57:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:57:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:57:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2023-09-01 12:57:33,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047043010752689 [2023-09-01 12:57:33,133 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2023-09-01 12:57:33,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2023-09-01 12:57:33,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:33,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2023-09-01 12:57:33,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,138 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 133 flow. Second operand 4 states and 751 transitions. [2023-09-01 12:57:33,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 416 flow [2023-09-01 12:57:33,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 12:57:33,143 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 193 flow [2023-09-01 12:57:33,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-09-01 12:57:33,143 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-09-01 12:57:33,144 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 193 flow [2023-09-01 12:57:33,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:33,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 12:57:33,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:33,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1017003560, now seen corresponding path program 1 times [2023-09-01 12:57:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944042486] [2023-09-01 12:57:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944042486] [2023-09-01 12:57:33,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944042486] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:57:33,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:57:33,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:57:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526957108] [2023-09-01 12:57:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:57:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:57:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:57:33,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 372 [2023-09-01 12:57:33,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:33,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 372 [2023-09-01 12:57:33,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:33,799 INFO L130 PetriNetUnfolder]: 3817/5665 cut-off events. [2023-09-01 12:57:33,799 INFO L131 PetriNetUnfolder]: For 4364/4364 co-relation queries the response was YES. [2023-09-01 12:57:33,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14384 conditions, 5665 events. 3817/5665 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28776 event pairs, 2160 based on Foata normal form. 186/4864 useless extension candidates. Maximal degree in co-relation 8356. Up to 3221 conditions per place. [2023-09-01 12:57:33,822 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 90 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2023-09-01 12:57:33,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 574 flow [2023-09-01 12:57:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:57:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:57:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 903 transitions. [2023-09-01 12:57:33,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4854838709677419 [2023-09-01 12:57:33,825 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 903 transitions. [2023-09-01 12:57:33,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 903 transitions. [2023-09-01 12:57:33,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:33,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 903 transitions. [2023-09-01 12:57:33,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,830 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,830 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 193 flow. Second operand 5 states and 903 transitions. [2023-09-01 12:57:33,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 574 flow [2023-09-01 12:57:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 572 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-09-01 12:57:33,838 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 243 flow [2023-09-01 12:57:33,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-09-01 12:57:33,838 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-09-01 12:57:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 243 flow [2023-09-01 12:57:33,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:33,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:33,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 12:57:33,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:33,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 331371296, now seen corresponding path program 1 times [2023-09-01 12:57:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:33,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713995902] [2023-09-01 12:57:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:33,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:33,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713995902] [2023-09-01 12:57:33,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713995902] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837334967] [2023-09-01 12:57:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:33,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:33,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:57:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:57:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:34,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837334967] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:34,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:34,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 12:57:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574299529] [2023-09-01 12:57:34,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:34,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:57:34,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:34,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:57:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:57:34,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-09-01 12:57:34,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:34,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:34,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-09-01 12:57:34,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:35,071 INFO L130 PetriNetUnfolder]: 5288/7796 cut-off events. [2023-09-01 12:57:35,072 INFO L131 PetriNetUnfolder]: For 8771/8771 co-relation queries the response was YES. [2023-09-01 12:57:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 7796 events. 5288/7796 cut-off events. For 8771/8771 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42303 event pairs, 2005 based on Foata normal form. 186/6605 useless extension candidates. Maximal degree in co-relation 14672. Up to 2043 conditions per place. [2023-09-01 12:57:35,139 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 165 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2023-09-01 12:57:35,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 184 transitions, 1068 flow [2023-09-01 12:57:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-09-01 12:57:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-09-01 12:57:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1611 transitions. [2023-09-01 12:57:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118279569892475 [2023-09-01 12:57:35,144 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1611 transitions. [2023-09-01 12:57:35,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1611 transitions. [2023-09-01 12:57:35,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:35,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1611 transitions. [2023-09-01 12:57:35,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:35,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 372.0) internal successors, (3720), 10 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:35,153 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 372.0) internal successors, (3720), 10 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:35,153 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 243 flow. Second operand 9 states and 1611 transitions. [2023-09-01 12:57:35,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 184 transitions, 1068 flow [2023-09-01 12:57:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 184 transitions, 1064 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 12:57:35,165 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 316 flow [2023-09-01 12:57:35,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-09-01 12:57:35,167 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2023-09-01 12:57:35,167 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 316 flow [2023-09-01 12:57:35,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.83333333333334) internal successors, (1990), 12 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:35,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:35,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:35,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:57:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:35,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:35,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash -683343843, now seen corresponding path program 1 times [2023-09-01 12:57:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:35,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082564896] [2023-09-01 12:57:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:35,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:35,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:35,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082564896] [2023-09-01 12:57:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082564896] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:57:35,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:57:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 12:57:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989757148] [2023-09-01 12:57:35,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:35,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 12:57:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 12:57:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:57:35,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 372 [2023-09-01 12:57:35,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:35,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:35,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 372 [2023-09-01 12:57:35,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:36,368 INFO L130 PetriNetUnfolder]: 4174/6390 cut-off events. [2023-09-01 12:57:36,368 INFO L131 PetriNetUnfolder]: For 9862/9862 co-relation queries the response was YES. [2023-09-01 12:57:36,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17827 conditions, 6390 events. 4174/6390 cut-off events. For 9862/9862 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 34198 event pairs, 2918 based on Foata normal form. 0/5375 useless extension candidates. Maximal degree in co-relation 12574. Up to 5314 conditions per place. [2023-09-01 12:57:36,400 INFO L137 encePairwiseOnDemand]: 366/372 looper letters, 45 selfloop transitions, 2 changer transitions 28/84 dead transitions. [2023-09-01 12:57:36,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 543 flow [2023-09-01 12:57:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:57:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:57:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-09-01 12:57:36,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2023-09-01 12:57:36,404 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-09-01 12:57:36,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-09-01 12:57:36,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:36,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-09-01 12:57:36,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:36,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:36,410 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:36,410 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 316 flow. Second operand 5 states and 885 transitions. [2023-09-01 12:57:36,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 543 flow [2023-09-01 12:57:36,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 527 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-09-01 12:57:36,431 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 280 flow [2023-09-01 12:57:36,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-09-01 12:57:36,433 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2023-09-01 12:57:36,433 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 280 flow [2023-09-01 12:57:36,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:36,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:36,434 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:36,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 12:57:36,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:36,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -818681128, now seen corresponding path program 2 times [2023-09-01 12:57:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112960696] [2023-09-01 12:57:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112960696] [2023-09-01 12:57:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112960696] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997054310] [2023-09-01 12:57:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:57:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:36,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:36,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:36,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:57:36,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:57:36,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:57:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:57:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:36,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:36,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997054310] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:36,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:57:36,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-09-01 12:57:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210463490] [2023-09-01 12:57:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:36,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:57:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:36,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:57:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-09-01 12:57:36,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-09-01 12:57:36,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:36,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:36,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-09-01 12:57:36,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:37,330 INFO L130 PetriNetUnfolder]: 3271/4874 cut-off events. [2023-09-01 12:57:37,330 INFO L131 PetriNetUnfolder]: For 7496/7496 co-relation queries the response was YES. [2023-09-01 12:57:37,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14504 conditions, 4874 events. 3271/4874 cut-off events. For 7496/7496 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24028 event pairs, 1845 based on Foata normal form. 96/4792 useless extension candidates. Maximal degree in co-relation 14477. Up to 2273 conditions per place. [2023-09-01 12:57:37,355 INFO L137 encePairwiseOnDemand]: 365/372 looper letters, 84 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-09-01 12:57:37,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 660 flow [2023-09-01 12:57:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:57:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:57:37,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2023-09-01 12:57:37,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47043010752688175 [2023-09-01 12:57:37,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2023-09-01 12:57:37,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2023-09-01 12:57:37,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:37,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2023-09-01 12:57:37,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:37,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:37,363 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:37,363 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 280 flow. Second operand 6 states and 1050 transitions. [2023-09-01 12:57:37,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 660 flow [2023-09-01 12:57:37,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 632 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-09-01 12:57:37,371 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 321 flow [2023-09-01 12:57:37,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-09-01 12:57:37,372 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2023-09-01 12:57:37,372 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 321 flow [2023-09-01 12:57:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.16666666666666) internal successors, (1003), 6 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:37,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:37,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:37,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 12:57:37,594 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,SelfDestructingSolverStorable5 [2023-09-01 12:57:37,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:37,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1536916939, now seen corresponding path program 1 times [2023-09-01 12:57:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:37,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322592679] [2023-09-01 12:57:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322592679] [2023-09-01 12:57:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322592679] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583656524] [2023-09-01 12:57:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:37,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:37,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:37,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:57:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 13 conjunts are in the unsatisfiable core [2023-09-01 12:57:37,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:37,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583656524] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:37,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:37,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-09-01 12:57:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506108406] [2023-09-01 12:57:37,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:57:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:57:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:57:38,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-09-01 12:57:38,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 321 flow. Second operand has 11 states, 11 states have (on average 166.36363636363637) internal successors, (1830), 11 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:38,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:38,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-09-01 12:57:38,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:38,392 INFO L130 PetriNetUnfolder]: 2097/3250 cut-off events. [2023-09-01 12:57:38,392 INFO L131 PetriNetUnfolder]: For 5670/5670 co-relation queries the response was YES. [2023-09-01 12:57:38,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10260 conditions, 3250 events. 2097/3250 cut-off events. For 5670/5670 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15542 event pairs, 845 based on Foata normal form. 192/3311 useless extension candidates. Maximal degree in co-relation 8477. Up to 1337 conditions per place. [2023-09-01 12:57:38,406 INFO L137 encePairwiseOnDemand]: 364/372 looper letters, 63 selfloop transitions, 5 changer transitions 28/105 dead transitions. [2023-09-01 12:57:38,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 704 flow [2023-09-01 12:57:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 12:57:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 12:57:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-09-01 12:57:38,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.467357910906298 [2023-09-01 12:57:38,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-09-01 12:57:38,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-09-01 12:57:38,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:38,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-09-01 12:57:38,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:38,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:38,414 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:38,415 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 321 flow. Second operand 7 states and 1217 transitions. [2023-09-01 12:57:38,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 704 flow [2023-09-01 12:57:38,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 691 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-09-01 12:57:38,424 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 290 flow [2023-09-01 12:57:38,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2023-09-01 12:57:38,425 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2023-09-01 12:57:38,425 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 290 flow [2023-09-01 12:57:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 166.36363636363637) internal successors, (1830), 11 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:38,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:38,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:38,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-09-01 12:57:38,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:38,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:38,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -946785205, now seen corresponding path program 2 times [2023-09-01 12:57:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650517695] [2023-09-01 12:57:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650517695] [2023-09-01 12:57:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650517695] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629555642] [2023-09-01 12:57:38,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:57:38,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:38,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:38,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:38,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:57:38,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:57:38,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:57:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2023-09-01 12:57:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:38,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:38,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629555642] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:38,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 12:57:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2023-09-01 12:57:38,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798841910] [2023-09-01 12:57:38,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:57:38,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 12:57:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 12:57:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:57:39,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 372 [2023-09-01 12:57:39,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:39,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:39,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 372 [2023-09-01 12:57:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:39,237 INFO L130 PetriNetUnfolder]: 1374/2010 cut-off events. [2023-09-01 12:57:39,238 INFO L131 PetriNetUnfolder]: For 4003/4003 co-relation queries the response was YES. [2023-09-01 12:57:39,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 2010 events. 1374/2010 cut-off events. For 4003/4003 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8101 event pairs, 639 based on Foata normal form. 134/2068 useless extension candidates. Maximal degree in co-relation 7143. Up to 1438 conditions per place. [2023-09-01 12:57:39,246 INFO L137 encePairwiseOnDemand]: 367/372 looper letters, 61 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2023-09-01 12:57:39,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 523 flow [2023-09-01 12:57:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:57:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:57:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2023-09-01 12:57:39,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46191756272401435 [2023-09-01 12:57:39,249 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2023-09-01 12:57:39,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2023-09-01 12:57:39,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:39,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2023-09-01 12:57:39,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:39,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:39,254 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 372.0) internal successors, (2604), 7 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:39,254 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 290 flow. Second operand 6 states and 1031 transitions. [2023-09-01 12:57:39,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 523 flow [2023-09-01 12:57:39,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 463 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-09-01 12:57:39,263 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 265 flow [2023-09-01 12:57:39,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-09-01 12:57:39,265 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2023-09-01 12:57:39,265 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 265 flow [2023-09-01 12:57:39,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:39,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:39,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:39,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:57:39,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:39,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:39,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:39,471 INFO L85 PathProgramCache]: Analyzing trace with hash -247168574, now seen corresponding path program 1 times [2023-09-01 12:57:39,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:39,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200256856] [2023-09-01 12:57:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:39,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200256856] [2023-09-01 12:57:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200256856] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913897633] [2023-09-01 12:57:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:39,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:39,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:57:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:57:40,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:40,131 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 19 treesize of output 7 [2023-09-01 12:57:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:40,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:40,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:40,254 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 20 treesize of output 14 [2023-09-01 12:57:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913897633] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:40,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:40,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-09-01 12:57:40,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45509532] [2023-09-01 12:57:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:40,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:57:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:57:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:57:40,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 12:57:40,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 265 flow. Second operand has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:40,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:40,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 12:57:40,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:41,426 INFO L130 PetriNetUnfolder]: 3727/5415 cut-off events. [2023-09-01 12:57:41,426 INFO L131 PetriNetUnfolder]: For 8668/8672 co-relation queries the response was YES. [2023-09-01 12:57:41,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18174 conditions, 5415 events. 3727/5415 cut-off events. For 8668/8672 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25649 event pairs, 661 based on Foata normal form. 2/5272 useless extension candidates. Maximal degree in co-relation 18138. Up to 2530 conditions per place. [2023-09-01 12:57:41,447 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 193 selfloop transitions, 60 changer transitions 2/261 dead transitions. [2023-09-01 12:57:41,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 261 transitions, 1648 flow [2023-09-01 12:57:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:57:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:57:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2687 transitions. [2023-09-01 12:57:41,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45144489247311825 [2023-09-01 12:57:41,452 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2687 transitions. [2023-09-01 12:57:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2687 transitions. [2023-09-01 12:57:41,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:41,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2687 transitions. [2023-09-01 12:57:41,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.9375) internal successors, (2687), 16 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:41,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:41,463 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:41,463 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 265 flow. Second operand 16 states and 2687 transitions. [2023-09-01 12:57:41,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 261 transitions, 1648 flow [2023-09-01 12:57:41,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 261 transitions, 1582 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-09-01 12:57:41,474 INFO L231 Difference]: Finished difference. Result has 84 places, 114 transitions, 787 flow [2023-09-01 12:57:41,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=787, PETRI_PLACES=84, PETRI_TRANSITIONS=114} [2023-09-01 12:57:41,475 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2023-09-01 12:57:41,475 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 114 transitions, 787 flow [2023-09-01 12:57:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:41,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:41,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:41,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 12:57:41,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:41,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:41,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1968162608, now seen corresponding path program 2 times [2023-09-01 12:57:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:41,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432970510] [2023-09-01 12:57:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:42,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432970510] [2023-09-01 12:57:42,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432970510] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:42,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584507874] [2023-09-01 12:57:42,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:57:42,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:42,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:42,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:57:42,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:57:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:57:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 75 conjunts are in the unsatisfiable core [2023-09-01 12:57:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:42,395 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-09-01 12:57:42,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2023-09-01 12:57:42,499 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:57:42,499 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 15 treesize of output 15 [2023-09-01 12:57:42,671 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 16 treesize of output 18 [2023-09-01 12:57:42,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 12:57:42,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:42,756 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 [2023-09-01 12:57:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:42,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:42,883 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_430 (Array Int Int))) (<= c_~s_2~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse0))) (forall ((v_ArrVal_430 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse0) (+ 1 c_~s_2~0))))) is different from false [2023-09-01 12:57:42,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:42,981 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 95 treesize of output 60 [2023-09-01 12:57:42,987 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 51 treesize of output 47 [2023-09-01 12:57:43,006 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 47 treesize of output 43 [2023-09-01 12:57:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:43,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584507874] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:43,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:43,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-09-01 12:57:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551084866] [2023-09-01 12:57:43,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:43,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:57:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:57:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=720, Unknown=2, NotChecked=54, Total=870 [2023-09-01 12:57:43,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 372 [2023-09-01 12:57:43,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 114 transitions, 787 flow. Second operand has 30 states, 30 states have (on average 119.26666666666667) internal successors, (3578), 30 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:43,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:43,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 372 [2023-09-01 12:57:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:57:44,784 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~X_0~0.offset 4))) (let ((.cse0 (forall ((v_ArrVal_430 (Array Int Int))) (<= c_~s_2~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse2)))) (.cse1 (forall ((v_ArrVal_430 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_430) c_~X_0~0.base) .cse2) (+ 1 c_~s_2~0))))) (and (<= 1 c_~n_1~0) (<= (+ c_~X_0~0.base 1) |c_#StackHeapBarrier|) (or (< c_~i_3~0 c_~n_1~0) (and .cse0 .cse1)) (= (select |c_#valid| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) 1) (<= (+ |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| 1) |c_#StackHeapBarrier|) (= (select |c_#valid| c_~X_0~0.base) 1) .cse0 (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse1 (= c_~X_0~0.offset 0)))) is different from false [2023-09-01 12:57:46,306 INFO L130 PetriNetUnfolder]: 6738/9682 cut-off events. [2023-09-01 12:57:46,306 INFO L131 PetriNetUnfolder]: For 29241/29273 co-relation queries the response was YES. [2023-09-01 12:57:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38207 conditions, 9682 events. 6738/9682 cut-off events. For 29241/29273 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49620 event pairs, 897 based on Foata normal form. 33/9362 useless extension candidates. Maximal degree in co-relation 38164. Up to 3033 conditions per place. [2023-09-01 12:57:46,347 INFO L137 encePairwiseOnDemand]: 351/372 looper letters, 288 selfloop transitions, 141 changer transitions 2/436 dead transitions. [2023-09-01 12:57:46,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 436 transitions, 3453 flow [2023-09-01 12:57:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 12:57:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 12:57:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3467 transitions. [2023-09-01 12:57:46,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34518120270808444 [2023-09-01 12:57:46,353 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3467 transitions. [2023-09-01 12:57:46,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3467 transitions. [2023-09-01 12:57:46,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:57:46,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3467 transitions. [2023-09-01 12:57:46,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 128.40740740740742) internal successors, (3467), 27 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:46,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 372.0) internal successors, (10416), 28 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:46,367 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 372.0) internal successors, (10416), 28 states have internal predecessors, (10416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:46,367 INFO L175 Difference]: Start difference. First operand has 84 places, 114 transitions, 787 flow. Second operand 27 states and 3467 transitions. [2023-09-01 12:57:46,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 436 transitions, 3453 flow [2023-09-01 12:57:46,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 436 transitions, 3360 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-09-01 12:57:46,447 INFO L231 Difference]: Finished difference. Result has 123 places, 223 transitions, 2166 flow [2023-09-01 12:57:46,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2166, PETRI_PLACES=123, PETRI_TRANSITIONS=223} [2023-09-01 12:57:46,448 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2023-09-01 12:57:46,448 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 223 transitions, 2166 flow [2023-09-01 12:57:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 119.26666666666667) internal successors, (3578), 30 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:46,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:57:46,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:57:46,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-09-01 12:57:46,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:46,654 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:57:46,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:57:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -128424216, now seen corresponding path program 3 times [2023-09-01 12:57:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:57:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540208983] [2023-09-01 12:57:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:57:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:57:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:57:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:57:47,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:57:47,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540208983] [2023-09-01 12:57:47,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540208983] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:57:47,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836483540] [2023-09-01 12:57:47,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:57:47,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:57:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:57:47,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:57:47,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:57:47,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 12:57:47,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:57:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 88 conjunts are in the unsatisfiable core [2023-09-01 12:57:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:57:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:57:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:57:47,498 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-09-01 12:57:47,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-09-01 12:57:47,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 12:57:47,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:47,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 12:57:47,766 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-09-01 12:57:47,766 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-09-01 12:57:47,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 12:57:47,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 12:57:47,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:47,974 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 15 [2023-09-01 12:57:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:48,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:57:48,245 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~i_3~0 1))) (and (forall ((v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0) (+ c_~s_6~0 1)) (< v_~i_3~0_145 c_~n_1~0))) (forall ((v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< v_~i_3~0_145 c_~n_1~0) (<= c_~s_6~0 (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0)))))) is different from false [2023-09-01 12:57:48,308 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~i_3~0 1))) (and (forall ((v_ArrVal_496 (Array Int Int)) (v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< v_~i_3~0_145 c_~n_1~0) (<= c_~s_6~0 (+ (select (select (store (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t2~0.base| v_ArrVal_496) |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0)))) (forall ((v_ArrVal_496 (Array Int Int)) (v_~i_3~0_145 Int) (v_ArrVal_497 (Array Int Int))) (or (< .cse0 v_~i_3~0_145) (< (+ (select (select (store (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t2~0.base| v_ArrVal_496) |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_497) c_~X_0~0.base) (+ (* v_~i_3~0_145 4) c_~X_0~0.offset)) c_~s_2~0) (+ c_~s_6~0 1)) (< v_~i_3~0_145 c_~n_1~0))))) is different from false [2023-09-01 12:57:50,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,046 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 61 treesize of output 50 [2023-09-01 12:57:50,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,063 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 52470 treesize of output 47358 [2023-09-01 12:57:50,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,147 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 165 treesize of output 144 [2023-09-01 12:57:50,159 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 330 treesize of output 282 [2023-09-01 12:57:50,168 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 282 treesize of output 258 [2023-09-01 12:57:50,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,181 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 158 treesize of output 107 [2023-09-01 12:57:50,452 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,453 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 63 treesize of output 52 [2023-09-01 12:57:50,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,464 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 3526 treesize of output 3214 [2023-09-01 12:57:50,502 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 392 treesize of output 368 [2023-09-01 12:57:50,510 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 368 treesize of output 320 [2023-09-01 12:57:50,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,522 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 320 treesize of output 268 [2023-09-01 12:57:50,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:57:50,536 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 144 treesize of output 123 [2023-09-01 12:57:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:57:50,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836483540] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:57:50,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:57:50,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 35 [2023-09-01 12:57:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167619675] [2023-09-01 12:57:50,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:57:50,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 12:57:50,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:57:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 12:57:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1046, Unknown=19, NotChecked=134, Total=1332 [2023-09-01 12:57:50,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 372 [2023-09-01 12:57:50,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 223 transitions, 2166 flow. Second operand has 37 states, 37 states have (on average 116.0) internal successors, (4292), 37 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:57:50,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:57:50,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 372 [2023-09-01 12:57:50,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:58:14,531 WARN L222 SmtUtils]: Spent 13.39s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:58:38,374 WARN L222 SmtUtils]: Spent 23.70s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:58:45,719 INFO L130 PetriNetUnfolder]: 14791/20930 cut-off events. [2023-09-01 12:58:45,719 INFO L131 PetriNetUnfolder]: For 126033/126051 co-relation queries the response was YES. [2023-09-01 12:58:45,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110361 conditions, 20930 events. 14791/20930 cut-off events. For 126033/126051 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 120365 event pairs, 1495 based on Foata normal form. 22/20226 useless extension candidates. Maximal degree in co-relation 110299. Up to 10342 conditions per place. [2023-09-01 12:58:45,847 INFO L137 encePairwiseOnDemand]: 354/372 looper letters, 718 selfloop transitions, 270 changer transitions 26/1019 dead transitions. [2023-09-01 12:58:45,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 1019 transitions, 10587 flow [2023-09-01 12:58:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-09-01 12:58:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-09-01 12:58:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5144 transitions. [2023-09-01 12:58:45,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33726724364017835 [2023-09-01 12:58:45,856 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5144 transitions. [2023-09-01 12:58:45,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5144 transitions. [2023-09-01 12:58:45,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:58:45,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5144 transitions. [2023-09-01 12:58:45,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 125.46341463414635) internal successors, (5144), 41 states have internal predecessors, (5144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:45,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 372.0) internal successors, (15624), 42 states have internal predecessors, (15624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:45,880 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 372.0) internal successors, (15624), 42 states have internal predecessors, (15624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:45,880 INFO L175 Difference]: Start difference. First operand has 123 places, 223 transitions, 2166 flow. Second operand 41 states and 5144 transitions. [2023-09-01 12:58:45,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 1019 transitions, 10587 flow [2023-09-01 12:58:46,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 1019 transitions, 9999 flow, removed 272 selfloop flow, removed 4 redundant places. [2023-09-01 12:58:46,543 INFO L231 Difference]: Finished difference. Result has 183 places, 461 transitions, 5060 flow [2023-09-01 12:58:46,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5060, PETRI_PLACES=183, PETRI_TRANSITIONS=461} [2023-09-01 12:58:46,544 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 137 predicate places. [2023-09-01 12:58:46,544 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 461 transitions, 5060 flow [2023-09-01 12:58:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 116.0) internal successors, (4292), 37 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:46,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:58:46,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:58:46,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:58:46,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:58:46,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:58:46,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:58:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1765278764, now seen corresponding path program 4 times [2023-09-01 12:58:46,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:58:46,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105399183] [2023-09-01 12:58:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:58:46,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:58:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:58:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:58:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105399183] [2023-09-01 12:58:47,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105399183] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:58:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820923364] [2023-09-01 12:58:47,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:58:47,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:58:47,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:58:47,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:58:47,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:58:47,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:58:47,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:58:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:58:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:58:47,560 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 19 treesize of output 7 [2023-09-01 12:58:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:47,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:58:47,685 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:58:47,685 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 21 treesize of output 15 [2023-09-01 12:58:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820923364] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:58:47,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:58:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 16 [2023-09-01 12:58:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924698484] [2023-09-01 12:58:47,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:58:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-09-01 12:58:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:58:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-09-01 12:58:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-09-01 12:58:48,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 12:58:48,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 461 transitions, 5060 flow. Second operand has 17 states, 17 states have (on average 157.7058823529412) internal successors, (2681), 17 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:48,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:58:48,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 12:58:48,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:58:51,688 INFO L130 PetriNetUnfolder]: 14719/21456 cut-off events. [2023-09-01 12:58:51,688 INFO L131 PetriNetUnfolder]: For 252259/252351 co-relation queries the response was YES. [2023-09-01 12:58:51,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142509 conditions, 21456 events. 14719/21456 cut-off events. For 252259/252351 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 129403 event pairs, 5001 based on Foata normal form. 29/20697 useless extension candidates. Maximal degree in co-relation 142420. Up to 17542 conditions per place. [2023-09-01 12:58:52,091 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 491 selfloop transitions, 126 changer transitions 2/625 dead transitions. [2023-09-01 12:58:52,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 625 transitions, 7986 flow [2023-09-01 12:58:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:58:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:58:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2317 transitions. [2023-09-01 12:58:52,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44489247311827956 [2023-09-01 12:58:52,096 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2317 transitions. [2023-09-01 12:58:52,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2317 transitions. [2023-09-01 12:58:52,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:58:52,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2317 transitions. [2023-09-01 12:58:52,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:52,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:52,103 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:52,103 INFO L175 Difference]: Start difference. First operand has 183 places, 461 transitions, 5060 flow. Second operand 14 states and 2317 transitions. [2023-09-01 12:58:52,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 625 transitions, 7986 flow [2023-09-01 12:58:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 625 transitions, 7269 flow, removed 349 selfloop flow, removed 5 redundant places. [2023-09-01 12:58:53,585 INFO L231 Difference]: Finished difference. Result has 193 places, 494 transitions, 5310 flow [2023-09-01 12:58:53,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5310, PETRI_PLACES=193, PETRI_TRANSITIONS=494} [2023-09-01 12:58:53,586 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2023-09-01 12:58:53,586 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 494 transitions, 5310 flow [2023-09-01 12:58:53,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.7058823529412) internal successors, (2681), 17 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:53,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:58:53,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:58:53,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-09-01 12:58:53,791 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,SelfDestructingSolverStorable11 [2023-09-01 12:58:53,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:58:53,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:58:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1655056862, now seen corresponding path program 1 times [2023-09-01 12:58:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:58:53,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509622900] [2023-09-01 12:58:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:58:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:58:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:58:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:54,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:58:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509622900] [2023-09-01 12:58:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509622900] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:58:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479073286] [2023-09-01 12:58:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:58:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:58:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:58:54,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:58:54,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:58:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:58:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:58:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:58:54,404 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 19 treesize of output 7 [2023-09-01 12:58:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:54,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:58:54,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:58:54,520 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 20 treesize of output 14 [2023-09-01 12:58:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:58:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479073286] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:58:54,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:58:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-09-01 12:58:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082413782] [2023-09-01 12:58:54,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:58:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:58:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:58:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:58:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:58:54,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 12:58:54,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 494 transitions, 5310 flow. Second operand has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:54,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:58:54,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 12:58:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:58:59,104 INFO L130 PetriNetUnfolder]: 17026/24730 cut-off events. [2023-09-01 12:58:59,104 INFO L131 PetriNetUnfolder]: For 256063/256138 co-relation queries the response was YES. [2023-09-01 12:58:59,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156681 conditions, 24730 events. 17026/24730 cut-off events. For 256063/256138 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 151203 event pairs, 5336 based on Foata normal form. 44/23855 useless extension candidates. Maximal degree in co-relation 156591. Up to 19853 conditions per place. [2023-09-01 12:58:59,299 INFO L137 encePairwiseOnDemand]: 362/372 looper letters, 592 selfloop transitions, 96 changer transitions 3/697 dead transitions. [2023-09-01 12:58:59,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 697 transitions, 8734 flow [2023-09-01 12:58:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 12:58:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 12:58:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2657 transitions. [2023-09-01 12:58:59,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4464045698924731 [2023-09-01 12:58:59,303 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2657 transitions. [2023-09-01 12:58:59,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2657 transitions. [2023-09-01 12:58:59,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:58:59,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2657 transitions. [2023-09-01 12:58:59,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 166.0625) internal successors, (2657), 16 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:59,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:59,311 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:58:59,311 INFO L175 Difference]: Start difference. First operand has 193 places, 494 transitions, 5310 flow. Second operand 16 states and 2657 transitions. [2023-09-01 12:58:59,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 697 transitions, 8734 flow [2023-09-01 12:59:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 697 transitions, 8457 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-09-01 12:59:00,770 INFO L231 Difference]: Finished difference. Result has 208 places, 544 transitions, 6105 flow [2023-09-01 12:59:00,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6105, PETRI_PLACES=208, PETRI_TRANSITIONS=544} [2023-09-01 12:59:00,771 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 162 predicate places. [2023-09-01 12:59:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 544 transitions, 6105 flow [2023-09-01 12:59:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:59:00,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:59:00,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-09-01 12:59:00,975 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,SelfDestructingSolverStorable12 [2023-09-01 12:59:00,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:59:00,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:59:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1289868276, now seen corresponding path program 5 times [2023-09-01 12:59:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:59:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262040796] [2023-09-01 12:59:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:59:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:59:01,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262040796] [2023-09-01 12:59:01,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262040796] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:59:01,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419006897] [2023-09-01 12:59:01,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:59:01,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:59:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:59:01,550 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:59:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 12:59:01,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 12:59:01,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:59:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 12:59:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:59:01,783 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 [2023-09-01 12:59:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:01,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:59:01,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:01,943 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 20 treesize of output 14 [2023-09-01 12:59:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419006897] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:59:02,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:59:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-09-01 12:59:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761626923] [2023-09-01 12:59:02,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:59:02,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-09-01 12:59:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:59:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-09-01 12:59:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-09-01 12:59:02,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 12:59:02,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 544 transitions, 6105 flow. Second operand has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:02,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:59:02,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 12:59:02,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:59:07,143 INFO L130 PetriNetUnfolder]: 18058/26301 cut-off events. [2023-09-01 12:59:07,143 INFO L131 PetriNetUnfolder]: For 294011/294105 co-relation queries the response was YES. [2023-09-01 12:59:07,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170473 conditions, 26301 events. 18058/26301 cut-off events. For 294011/294105 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 163224 event pairs, 6083 based on Foata normal form. 36/25369 useless extension candidates. Maximal degree in co-relation 170375. Up to 22047 conditions per place. [2023-09-01 12:59:07,510 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 546 selfloop transitions, 137 changer transitions 2/691 dead transitions. [2023-09-01 12:59:07,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 691 transitions, 8967 flow [2023-09-01 12:59:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:59:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:59:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2465 transitions. [2023-09-01 12:59:07,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44175627240143367 [2023-09-01 12:59:07,531 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2465 transitions. [2023-09-01 12:59:07,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2465 transitions. [2023-09-01 12:59:07,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:59:07,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2465 transitions. [2023-09-01 12:59:07,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.33333333333334) internal successors, (2465), 15 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:07,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:07,537 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:07,537 INFO L175 Difference]: Start difference. First operand has 208 places, 544 transitions, 6105 flow. Second operand 15 states and 2465 transitions. [2023-09-01 12:59:07,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 691 transitions, 8967 flow [2023-09-01 12:59:09,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 691 transitions, 8640 flow, removed 143 selfloop flow, removed 3 redundant places. [2023-09-01 12:59:09,618 INFO L231 Difference]: Finished difference. Result has 223 places, 574 transitions, 6634 flow [2023-09-01 12:59:09,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6634, PETRI_PLACES=223, PETRI_TRANSITIONS=574} [2023-09-01 12:59:09,619 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2023-09-01 12:59:09,619 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 574 transitions, 6634 flow [2023-09-01 12:59:09,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.53333333333333) internal successors, (2363), 15 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:09,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:59:09,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:59:09,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 12:59:09,823 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,SelfDestructingSolverStorable13 [2023-09-01 12:59:09,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:59:09,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:59:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1074571550, now seen corresponding path program 6 times [2023-09-01 12:59:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:59:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853363310] [2023-09-01 12:59:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:59:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:59:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853363310] [2023-09-01 12:59:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853363310] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:59:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183336757] [2023-09-01 12:59:10,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:59:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:59:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:59:10,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:59:10,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 12:59:10,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 12:59:10,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:59:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 64 conjunts are in the unsatisfiable core [2023-09-01 12:59:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:59:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:59:10,534 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 18 treesize of output 20 [2023-09-01 12:59:10,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:10,695 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 21 treesize of output 15 [2023-09-01 12:59:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:59:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:59:11,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:11,172 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 95 treesize of output 60 [2023-09-01 12:59:11,176 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 51 treesize of output 47 [2023-09-01 12:59:11,179 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 47 treesize of output 43 [2023-09-01 12:59:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:59:11,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183336757] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:59:11,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:59:11,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2023-09-01 12:59:11,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854847286] [2023-09-01 12:59:11,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:59:11,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 12:59:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:59:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 12:59:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=764, Unknown=4, NotChecked=0, Total=870 [2023-09-01 12:59:12,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 372 [2023-09-01 12:59:12,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 574 transitions, 6634 flow. Second operand has 30 states, 30 states have (on average 127.4) internal successors, (3822), 30 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:12,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:59:12,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 372 [2023-09-01 12:59:12,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:59:18,956 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 43 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:59:28,852 INFO L130 PetriNetUnfolder]: 20575/29361 cut-off events. [2023-09-01 12:59:28,852 INFO L131 PetriNetUnfolder]: For 356172/356204 co-relation queries the response was YES. [2023-09-01 12:59:29,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194390 conditions, 29361 events. 20575/29361 cut-off events. For 356172/356204 co-relation queries the response was YES. Maximal size of possible extension queue 1218. Compared 177070 event pairs, 6364 based on Foata normal form. 33/28380 useless extension candidates. Maximal degree in co-relation 194287. Up to 23856 conditions per place. [2023-09-01 12:59:29,237 INFO L137 encePairwiseOnDemand]: 358/372 looper letters, 574 selfloop transitions, 202 changer transitions 2/783 dead transitions. [2023-09-01 12:59:29,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 783 transitions, 10280 flow [2023-09-01 12:59:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-09-01 12:59:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-09-01 12:59:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2578 transitions. [2023-09-01 12:59:29,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647425014148274 [2023-09-01 12:59:29,240 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2578 transitions. [2023-09-01 12:59:29,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2578 transitions. [2023-09-01 12:59:29,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:59:29,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2578 transitions. [2023-09-01 12:59:29,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.68421052631578) internal successors, (2578), 19 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:29,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 372.0) internal successors, (7440), 20 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:29,247 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 372.0) internal successors, (7440), 20 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:29,247 INFO L175 Difference]: Start difference. First operand has 223 places, 574 transitions, 6634 flow. Second operand 19 states and 2578 transitions. [2023-09-01 12:59:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 783 transitions, 10280 flow [2023-09-01 12:59:31,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 783 transitions, 9893 flow, removed 81 selfloop flow, removed 10 redundant places. [2023-09-01 12:59:31,506 INFO L231 Difference]: Finished difference. Result has 238 places, 634 transitions, 7823 flow [2023-09-01 12:59:31,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=6258, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7823, PETRI_PLACES=238, PETRI_TRANSITIONS=634} [2023-09-01 12:59:31,507 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2023-09-01 12:59:31,507 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 634 transitions, 7823 flow [2023-09-01 12:59:31,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 127.4) internal successors, (3822), 30 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:31,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:59:31,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:59:31,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 12:59:31,713 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,SelfDestructingSolverStorable14 [2023-09-01 12:59:31,714 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:59:31,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:59:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1037163596, now seen corresponding path program 7 times [2023-09-01 12:59:31,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:59:31,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106710320] [2023-09-01 12:59:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:59:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:32,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:59:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106710320] [2023-09-01 12:59:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106710320] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:59:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245322999] [2023-09-01 12:59:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 12:59:32,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:59:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:59:32,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:59:32,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 12:59:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:59:32,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:59:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:59:32,757 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 16 treesize of output 18 [2023-09-01 12:59:32,785 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 19 treesize of output 7 [2023-09-01 12:59:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:32,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:59:32,966 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_779 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)))) (forall ((v_ArrVal_779 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0)) (+ c_~t_4~0 1 c_~s_2~0))))) is different from false [2023-09-01 12:59:32,979 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4))) (and (forall ((v_ArrVal_779 (Array Int Int))) (<= (+ c_~t_4~0 c_~s_2~0) (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0))) (forall ((v_ArrVal_779 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_779) c_~X_0~0.base) .cse0) (+ c_~t_4~0 1 c_~s_2~0))))) is different from false [2023-09-01 12:59:32,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:32,987 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 50 treesize of output 34 [2023-09-01 12:59:32,989 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 14 treesize of output 10 [2023-09-01 12:59:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 12:59:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:33,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245322999] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:59:33,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:59:33,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-09-01 12:59:33,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166282421] [2023-09-01 12:59:33,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:59:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 12:59:33,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:59:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 12:59:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=359, Unknown=6, NotChecked=78, Total=506 [2023-09-01 12:59:33,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 372 [2023-09-01 12:59:33,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 634 transitions, 7823 flow. Second operand has 23 states, 23 states have (on average 139.69565217391303) internal successors, (3213), 23 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:33,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:59:33,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 372 [2023-09-01 12:59:33,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:59:39,414 INFO L130 PetriNetUnfolder]: 21082/30078 cut-off events. [2023-09-01 12:59:39,414 INFO L131 PetriNetUnfolder]: For 417744/417776 co-relation queries the response was YES. [2023-09-01 12:59:39,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207282 conditions, 30078 events. 21082/30078 cut-off events. For 417744/417776 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 182424 event pairs, 6492 based on Foata normal form. 33/29067 useless extension candidates. Maximal degree in co-relation 207170. Up to 23898 conditions per place. [2023-09-01 12:59:39,837 INFO L137 encePairwiseOnDemand]: 361/372 looper letters, 559 selfloop transitions, 213 changer transitions 2/779 dead transitions. [2023-09-01 12:59:39,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 779 transitions, 10785 flow [2023-09-01 12:59:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 12:59:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 12:59:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2222 transitions. [2023-09-01 12:59:39,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982078853046595 [2023-09-01 12:59:39,840 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2222 transitions. [2023-09-01 12:59:39,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2222 transitions. [2023-09-01 12:59:39,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:59:39,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2222 transitions. [2023-09-01 12:59:39,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 148.13333333333333) internal successors, (2222), 15 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:39,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:39,845 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 372.0) internal successors, (5952), 16 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:39,846 INFO L175 Difference]: Start difference. First operand has 238 places, 634 transitions, 7823 flow. Second operand 15 states and 2222 transitions. [2023-09-01 12:59:39,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 779 transitions, 10785 flow [2023-09-01 12:59:42,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 779 transitions, 10270 flow, removed 164 selfloop flow, removed 11 redundant places. [2023-09-01 12:59:42,557 INFO L231 Difference]: Finished difference. Result has 244 places, 650 transitions, 8143 flow [2023-09-01 12:59:42,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8143, PETRI_PLACES=244, PETRI_TRANSITIONS=650} [2023-09-01 12:59:42,558 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 198 predicate places. [2023-09-01 12:59:42,558 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 650 transitions, 8143 flow [2023-09-01 12:59:42,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.69565217391303) internal successors, (3213), 23 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:42,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:59:42,559 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:59:42,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-09-01 12:59:42,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 12:59:42,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:59:42,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:59:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 868356021, now seen corresponding path program 1 times [2023-09-01 12:59:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:59:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188320880] [2023-09-01 12:59:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:59:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:59:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188320880] [2023-09-01 12:59:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188320880] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:59:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863724587] [2023-09-01 12:59:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:43,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:59:43,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:59:43,296 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:59:43,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 12:59:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 12:59:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:59:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:59:43,605 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 16 treesize of output 18 [2023-09-01 12:59:43,663 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 19 treesize of output 7 [2023-09-01 12:59:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:43,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:59:43,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:43,867 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 48 treesize of output 32 [2023-09-01 12:59:43,869 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 13 treesize of output 9 [2023-09-01 12:59:43,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 12:59:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863724587] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:59:43,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:59:43,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 12:59:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086043194] [2023-09-01 12:59:43,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:59:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-09-01 12:59:44,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:59:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-09-01 12:59:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=387, Unknown=7, NotChecked=0, Total=462 [2023-09-01 12:59:44,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 372 [2023-09-01 12:59:44,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 650 transitions, 8143 flow. Second operand has 22 states, 22 states have (on average 139.86363636363637) internal successors, (3077), 22 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:44,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:59:44,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 372 [2023-09-01 12:59:44,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:59:50,886 INFO L130 PetriNetUnfolder]: 21594/30782 cut-off events. [2023-09-01 12:59:50,887 INFO L131 PetriNetUnfolder]: For 442764/442796 co-relation queries the response was YES. [2023-09-01 12:59:51,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215225 conditions, 30782 events. 21594/30782 cut-off events. For 442764/442796 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 187094 event pairs, 7015 based on Foata normal form. 33/29745 useless extension candidates. Maximal degree in co-relation 215112. Up to 25765 conditions per place. [2023-09-01 12:59:51,325 INFO L137 encePairwiseOnDemand]: 362/372 looper letters, 604 selfloop transitions, 168 changer transitions 2/779 dead transitions. [2023-09-01 12:59:51,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 779 transitions, 11107 flow [2023-09-01 12:59:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:59:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:59:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2066 transitions. [2023-09-01 12:59:51,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966973886328725 [2023-09-01 12:59:51,328 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2066 transitions. [2023-09-01 12:59:51,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2066 transitions. [2023-09-01 12:59:51,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:59:51,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2066 transitions. [2023-09-01 12:59:51,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 147.57142857142858) internal successors, (2066), 14 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:51,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:51,333 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:51,333 INFO L175 Difference]: Start difference. First operand has 244 places, 650 transitions, 8143 flow. Second operand 14 states and 2066 transitions. [2023-09-01 12:59:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 779 transitions, 11107 flow [2023-09-01 12:59:54,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 779 transitions, 10819 flow, removed 57 selfloop flow, removed 9 redundant places. [2023-09-01 12:59:54,063 INFO L231 Difference]: Finished difference. Result has 251 places, 667 transitions, 8635 flow [2023-09-01 12:59:54,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8635, PETRI_PLACES=251, PETRI_TRANSITIONS=667} [2023-09-01 12:59:54,064 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 205 predicate places. [2023-09-01 12:59:54,064 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 667 transitions, 8635 flow [2023-09-01 12:59:54,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 139.86363636363637) internal successors, (3077), 22 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:54,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:59:54,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:59:54,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 12:59:54,269 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,SelfDestructingSolverStorable16 [2023-09-01 12:59:54,269 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 12:59:54,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:59:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1527271102, now seen corresponding path program 1 times [2023-09-01 12:59:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:59:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182366196] [2023-09-01 12:59:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:54,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:59:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:54,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:59:54,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182366196] [2023-09-01 12:59:54,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182366196] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:59:54,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69998195] [2023-09-01 12:59:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:59:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:59:54,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:59:54,596 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 12:59:54,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 12:59:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:59:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 12:59:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:59:54,827 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 19 treesize of output 7 [2023-09-01 12:59:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:54,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:59:54,941 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:59:54,941 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 25 treesize of output 16 [2023-09-01 12:59:54,950 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:59:54,950 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 26 treesize of output 13 [2023-09-01 12:59:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:59:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69998195] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:59:54,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:59:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-09-01 12:59:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136498955] [2023-09-01 12:59:54,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:59:54,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 12:59:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:59:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 12:59:54,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-09-01 12:59:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 12:59:55,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 667 transitions, 8635 flow. Second operand has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:59:55,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:59:55,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 12:59:55,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:00:02,079 INFO L130 PetriNetUnfolder]: 22366/32454 cut-off events. [2023-09-01 13:00:02,080 INFO L131 PetriNetUnfolder]: For 515562/515664 co-relation queries the response was YES. [2023-09-01 13:00:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233616 conditions, 32454 events. 22366/32454 cut-off events. For 515562/515664 co-relation queries the response was YES. Maximal size of possible extension queue 1444. Compared 206638 event pairs, 7640 based on Foata normal form. 27/31289 useless extension candidates. Maximal degree in co-relation 233499. Up to 27446 conditions per place. [2023-09-01 13:00:02,379 INFO L137 encePairwiseOnDemand]: 362/372 looper letters, 743 selfloop transitions, 107 changer transitions 3/859 dead transitions. [2023-09-01 13:00:02,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 859 transitions, 12539 flow [2023-09-01 13:00:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:00:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:00:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2178 transitions. [2023-09-01 13:00:02,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45037220843672454 [2023-09-01 13:00:02,382 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2178 transitions. [2023-09-01 13:00:02,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2178 transitions. [2023-09-01 13:00:02,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:00:02,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2178 transitions. [2023-09-01 13:00:02,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.53846153846155) internal successors, (2178), 13 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:02,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:02,387 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:02,387 INFO L175 Difference]: Start difference. First operand has 251 places, 667 transitions, 8635 flow. Second operand 13 states and 2178 transitions. [2023-09-01 13:00:02,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 859 transitions, 12539 flow [2023-09-01 13:00:05,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 859 transitions, 12129 flow, removed 63 selfloop flow, removed 10 redundant places. [2023-09-01 13:00:05,732 INFO L231 Difference]: Finished difference. Result has 259 places, 720 transitions, 9665 flow [2023-09-01 13:00:05,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=8225, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9665, PETRI_PLACES=259, PETRI_TRANSITIONS=720} [2023-09-01 13:00:05,732 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 213 predicate places. [2023-09-01 13:00:05,733 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 720 transitions, 9665 flow [2023-09-01 13:00:05,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:05,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:00:05,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:00:05,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 13:00:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:05,938 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 13:00:05,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:00:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1672988728, now seen corresponding path program 1 times [2023-09-01 13:00:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:00:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826036319] [2023-09-01 13:00:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:00:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:00:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:00:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:00:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826036319] [2023-09-01 13:00:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826036319] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:00:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683662050] [2023-09-01 13:00:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:00:06,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:00:06,245 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:00:06,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 13:00:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:00:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 13:00:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:00:06,454 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 19 treesize of output 7 [2023-09-01 13:00:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:06,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:00:06,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:00:06,569 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 25 treesize of output 16 [2023-09-01 13:00:06,579 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:00:06,579 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 26 treesize of output 13 [2023-09-01 13:00:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683662050] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:00:06,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:00:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2023-09-01 13:00:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682501958] [2023-09-01 13:00:06,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:00:06,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-09-01 13:00:06,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:00:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-09-01 13:00:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-09-01 13:00:06,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 13:00:06,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 720 transitions, 9665 flow. Second operand has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:06,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:00:06,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 13:00:06,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:00:14,330 INFO L130 PetriNetUnfolder]: 23355/33841 cut-off events. [2023-09-01 13:00:14,330 INFO L131 PetriNetUnfolder]: For 578567/578667 co-relation queries the response was YES. [2023-09-01 13:00:14,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247743 conditions, 33841 events. 23355/33841 cut-off events. For 578567/578667 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 216111 event pairs, 8482 based on Foata normal form. 30/32615 useless extension candidates. Maximal degree in co-relation 247620. Up to 30281 conditions per place. [2023-09-01 13:00:14,671 INFO L137 encePairwiseOnDemand]: 363/372 looper letters, 764 selfloop transitions, 80 changer transitions 4/854 dead transitions. [2023-09-01 13:00:14,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 854 transitions, 12812 flow [2023-09-01 13:00:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 13:00:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 13:00:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2164 transitions. [2023-09-01 13:00:14,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44747725392886684 [2023-09-01 13:00:14,674 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2164 transitions. [2023-09-01 13:00:14,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2164 transitions. [2023-09-01 13:00:14,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:00:14,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2164 transitions. [2023-09-01 13:00:14,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.46153846153845) internal successors, (2164), 13 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:14,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:14,679 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 372.0) internal successors, (5208), 14 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:14,679 INFO L175 Difference]: Start difference. First operand has 259 places, 720 transitions, 9665 flow. Second operand 13 states and 2164 transitions. [2023-09-01 13:00:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 854 transitions, 12812 flow [2023-09-01 13:00:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 854 transitions, 12350 flow, removed 224 selfloop flow, removed 4 redundant places. [2023-09-01 13:00:18,435 INFO L231 Difference]: Finished difference. Result has 270 places, 745 transitions, 9957 flow [2023-09-01 13:00:18,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=9219, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9957, PETRI_PLACES=270, PETRI_TRANSITIONS=745} [2023-09-01 13:00:18,435 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 224 predicate places. [2023-09-01 13:00:18,435 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 745 transitions, 9957 flow [2023-09-01 13:00:18,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.375) internal successors, (2518), 16 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:18,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:00:18,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:00:18,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 13:00:18,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:18,641 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 13:00:18,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:00:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1526350780, now seen corresponding path program 2 times [2023-09-01 13:00:18,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:00:18,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710213110] [2023-09-01 13:00:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:00:18,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:00:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:00:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:19,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:00:19,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710213110] [2023-09-01 13:00:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710213110] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:00:19,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88122724] [2023-09-01 13:00:19,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:00:19,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:19,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:00:19,015 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:00:19,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 13:00:19,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:00:19,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:00:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 77 conjunts are in the unsatisfiable core [2023-09-01 13:00:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:00:19,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 13:00:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:00:19,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:00:19,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 13:00:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:00:19,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:00:19,521 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 [2023-09-01 13:00:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:00:19,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:00:19,642 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_1010 (Array Int Int))) (<= c_~s_2~0 (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1010) c_~X_0~0.base) .cse0)))) (forall ((v_ArrVal_1010 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1010) c_~X_0~0.base) .cse0)) (+ 1 c_~s_2~0))))) is different from false [2023-09-01 13:00:19,713 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_~X_0~0.base) (+ c_~X_0~0.offset 4 (* 4 c_~i_3~0)))) (.cse0 (+ c_~X_0~0.offset 4 (* 4 c_~i_7~0)))) (and (forall ((v_ArrVal_1010 (Array Int Int))) (< (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1010) c_~X_0~0.base) .cse0)) (+ .cse1 1 c_~s_2~0))) (forall ((v_ArrVal_1010 (Array Int Int))) (<= (+ .cse1 c_~s_2~0) (+ c_~s_6~0 (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork0_~#t3~0.base| v_ArrVal_1010) c_~X_0~0.base) .cse0)))))) is different from false [2023-09-01 13:00:24,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:00:24,551 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 60 treesize of output 49 [2023-09-01 13:00:24,557 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 38902 treesize of output 36790 [2023-09-01 13:00:24,658 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 83 treesize of output 79 [2023-09-01 13:00:24,662 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 166 treesize of output 134 [2023-09-01 13:00:24,668 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 63 treesize of output 55 [2023-09-01 13:00:24,673 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 70 treesize of output 54 [2023-09-01 13:00:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 13:00:24,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88122724] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:00:24,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:00:24,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 29 [2023-09-01 13:00:24,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491076750] [2023-09-01 13:00:24,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:00:24,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 13:00:24,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:00:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 13:00:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=688, Unknown=22, NotChecked=110, Total=930 [2023-09-01 13:00:24,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 372 [2023-09-01 13:00:24,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 745 transitions, 9957 flow. Second operand has 31 states, 31 states have (on average 124.16129032258064) internal successors, (3849), 31 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:24,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:00:24,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 372 [2023-09-01 13:00:24,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:00:42,133 INFO L130 PetriNetUnfolder]: 52095/74089 cut-off events. [2023-09-01 13:00:42,134 INFO L131 PetriNetUnfolder]: For 1240353/1240385 co-relation queries the response was YES. [2023-09-01 13:00:43,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540915 conditions, 74089 events. 52095/74089 cut-off events. For 1240353/1240385 co-relation queries the response was YES. Maximal size of possible extension queue 3045. Compared 502785 event pairs, 19718 based on Foata normal form. 34/71551 useless extension candidates. Maximal degree in co-relation 540040. Up to 37597 conditions per place. [2023-09-01 13:00:43,550 INFO L137 encePairwiseOnDemand]: 354/372 looper letters, 1485 selfloop transitions, 254 changer transitions 4/1748 dead transitions. [2023-09-01 13:00:43,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1748 transitions, 26385 flow [2023-09-01 13:00:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 13:00:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 13:00:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3209 transitions. [2023-09-01 13:00:43,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594310035842294 [2023-09-01 13:00:43,581 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3209 transitions. [2023-09-01 13:00:43,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3209 transitions. [2023-09-01 13:00:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:00:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3209 transitions. [2023-09-01 13:00:43,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 133.70833333333334) internal successors, (3209), 24 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:43,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 372.0) internal successors, (9300), 25 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:43,598 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 372.0) internal successors, (9300), 25 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:43,598 INFO L175 Difference]: Start difference. First operand has 270 places, 745 transitions, 9957 flow. Second operand 24 states and 3209 transitions. [2023-09-01 13:00:43,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1748 transitions, 26385 flow [2023-09-01 13:00:56,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1748 transitions, 25816 flow, removed 238 selfloop flow, removed 4 redundant places. [2023-09-01 13:00:56,054 INFO L231 Difference]: Finished difference. Result has 300 places, 918 transitions, 13750 flow [2023-09-01 13:00:56,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=9672, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13750, PETRI_PLACES=300, PETRI_TRANSITIONS=918} [2023-09-01 13:00:56,055 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 254 predicate places. [2023-09-01 13:00:56,055 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 918 transitions, 13750 flow [2023-09-01 13:00:56,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 124.16129032258064) internal successors, (3849), 31 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:56,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:00:56,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:00:56,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 13:00:56,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:56,260 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 13:00:56,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:00:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1973399818, now seen corresponding path program 3 times [2023-09-01 13:00:56,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:00:56,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359047267] [2023-09-01 13:00:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:00:56,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:00:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:00:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:56,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:00:56,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359047267] [2023-09-01 13:00:56,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359047267] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:00:56,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099678705] [2023-09-01 13:00:56,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:00:56,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:00:56,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:00:56,585 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:00:56,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 13:00:56,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:00:56,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:00:56,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 59 conjunts are in the unsatisfiable core [2023-09-01 13:00:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:00:56,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:00:56,901 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 15 [2023-09-01 13:00:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:00:57,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:00:57,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:00:57,346 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 63 [2023-09-01 13:00:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:00:57,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099678705] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:00:57,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:00:57,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2023-09-01 13:00:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010570319] [2023-09-01 13:00:57,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:00:57,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 13:00:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:00:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 13:00:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-09-01 13:00:58,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 372 [2023-09-01 13:00:58,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 918 transitions, 13750 flow. Second operand has 20 states, 20 states have (on average 153.3) internal successors, (3066), 20 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:00:58,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:00:58,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 372 [2023-09-01 13:00:58,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:18,523 INFO L130 PetriNetUnfolder]: 53113/76939 cut-off events. [2023-09-01 13:01:18,524 INFO L131 PetriNetUnfolder]: For 1422947/1423207 co-relation queries the response was YES. [2023-09-01 13:01:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606001 conditions, 76939 events. 53113/76939 cut-off events. For 1422947/1423207 co-relation queries the response was YES. Maximal size of possible extension queue 3369. Compared 546824 event pairs, 18650 based on Foata normal form. 60/74167 useless extension candidates. Maximal degree in co-relation 605083. Up to 66248 conditions per place. [2023-09-01 13:01:19,913 INFO L137 encePairwiseOnDemand]: 357/372 looper letters, 929 selfloop transitions, 224 changer transitions 19/1178 dead transitions. [2023-09-01 13:01:19,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1178 transitions, 19594 flow [2023-09-01 13:01:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 13:01:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 13:01:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2588 transitions. [2023-09-01 13:01:19,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43481182795698925 [2023-09-01 13:01:19,916 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2588 transitions. [2023-09-01 13:01:19,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2588 transitions. [2023-09-01 13:01:19,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:01:19,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2588 transitions. [2023-09-01 13:01:19,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.75) internal successors, (2588), 16 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:19,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:19,921 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 372.0) internal successors, (6324), 17 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:19,921 INFO L175 Difference]: Start difference. First operand has 300 places, 918 transitions, 13750 flow. Second operand 16 states and 2588 transitions. [2023-09-01 13:01:19,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1178 transitions, 19594 flow [2023-09-01 13:01:36,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1178 transitions, 19067 flow, removed 246 selfloop flow, removed 5 redundant places. [2023-09-01 13:01:36,320 INFO L231 Difference]: Finished difference. Result has 319 places, 1029 transitions, 16159 flow [2023-09-01 13:01:36,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=13223, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=747, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=16159, PETRI_PLACES=319, PETRI_TRANSITIONS=1029} [2023-09-01 13:01:36,320 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 273 predicate places. [2023-09-01 13:01:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1029 transitions, 16159 flow [2023-09-01 13:01:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.3) internal successors, (3066), 20 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:36,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:01:36,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:01:36,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 13:01:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:36,527 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 13:01:36,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:01:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1942446220, now seen corresponding path program 4 times [2023-09-01 13:01:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:01:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678671683] [2023-09-01 13:01:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:01:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:01:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:01:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:01:37,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:01:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678671683] [2023-09-01 13:01:37,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678671683] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:01:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712660049] [2023-09-01 13:01:37,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 13:01:37,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:01:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:01:37,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:01:37,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 13:01:37,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 13:01:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:01:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 13:01:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:01:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:01:37,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-09-01 13:01:37,567 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 [2023-09-01 13:01:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:01:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:01:37,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:01:37,767 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 60 treesize of output 41 [2023-09-01 13:01:37,771 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 19 treesize of output 12 [2023-09-01 13:01:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 13:01:37,786 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:01:37,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-09-01 13:01:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:01:37,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712660049] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:01:37,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:01:37,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2023-09-01 13:01:37,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068449393] [2023-09-01 13:01:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:01:37,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 13:01:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:01:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 13:01:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=468, Unknown=5, NotChecked=0, Total=552 [2023-09-01 13:01:38,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 372 [2023-09-01 13:01:38,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1029 transitions, 16159 flow. Second operand has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:01:38,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:01:38,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 372 [2023-09-01 13:01:38,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:01:59,844 INFO L130 PetriNetUnfolder]: 58459/83212 cut-off events. [2023-09-01 13:01:59,844 INFO L131 PetriNetUnfolder]: For 1739636/1739664 co-relation queries the response was YES. [2023-09-01 13:02:01,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686173 conditions, 83212 events. 58459/83212 cut-off events. For 1739636/1739664 co-relation queries the response was YES. Maximal size of possible extension queue 3426. Compared 574122 event pairs, 21846 based on Foata normal form. 30/80406 useless extension candidates. Maximal degree in co-relation 685182. Up to 73210 conditions per place. [2023-09-01 13:02:01,918 INFO L137 encePairwiseOnDemand]: 359/372 looper letters, 883 selfloop transitions, 234 changer transitions 4/1126 dead transitions. [2023-09-01 13:02:01,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1126 transitions, 19665 flow [2023-09-01 13:02:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-09-01 13:02:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-09-01 13:02:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1553 transitions. [2023-09-01 13:02:01,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3478942652329749 [2023-09-01 13:02:01,920 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1553 transitions. [2023-09-01 13:02:01,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1553 transitions. [2023-09-01 13:02:01,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:02:01,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1553 transitions. [2023-09-01 13:02:01,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 129.41666666666666) internal successors, (1553), 12 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:01,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 372.0) internal successors, (4836), 13 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:01,949 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 372.0) internal successors, (4836), 13 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:01,949 INFO L175 Difference]: Start difference. First operand has 319 places, 1029 transitions, 16159 flow. Second operand 12 states and 1553 transitions. [2023-09-01 13:02:01,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1126 transitions, 19665 flow [2023-09-01 13:02:24,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1126 transitions, 19066 flow, removed 294 selfloop flow, removed 3 redundant places. [2023-09-01 13:02:24,710 INFO L231 Difference]: Finished difference. Result has 331 places, 1050 transitions, 16627 flow [2023-09-01 13:02:24,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=15578, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16627, PETRI_PLACES=331, PETRI_TRANSITIONS=1050} [2023-09-01 13:02:24,710 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 285 predicate places. [2023-09-01 13:02:24,711 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1050 transitions, 16627 flow [2023-09-01 13:02:24,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:24,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:02:24,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 13:02:24,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 13:02:24,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:02:24,918 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-09-01 13:02:24,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:02:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2000384736, now seen corresponding path program 5 times [2023-09-01 13:02:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:02:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741699230] [2023-09-01 13:02:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:02:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:02:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:02:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:02:25,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:02:25,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741699230] [2023-09-01 13:02:25,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741699230] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:02:25,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131120067] [2023-09-01 13:02:25,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:02:25,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:02:25,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:02:25,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:02:25,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 13:02:25,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:02:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:02:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 51 conjunts are in the unsatisfiable core [2023-09-01 13:02:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:02:25,424 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 [2023-09-01 13:02:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:02:25,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:02:25,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:02:25,547 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 26 treesize of output 17 [2023-09-01 13:02:25,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 13:02:25,557 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 25 treesize of output 12 [2023-09-01 13:02:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:02:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131120067] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:02:25,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:02:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-09-01 13:02:25,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207383237] [2023-09-01 13:02:25,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:02:25,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-09-01 13:02:25,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:02:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-09-01 13:02:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-09-01 13:02:25,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-09-01 13:02:25,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1050 transitions, 16627 flow. Second operand has 14 states, 14 states have (on average 157.57142857142858) internal successors, (2206), 14 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:02:25,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:02:25,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-09-01 13:02:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand