./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/11_fmaxsymopt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/11_fmaxsymopt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 16:42:26,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:42:26,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:42:26,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:42:26,520 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:42:26,535 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:42:26,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:42:26,536 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:42:26,537 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:42:26,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:42:26,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:42:26,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:42:26,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:42:26,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:42:26,539 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:42:26,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:42:26,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:42:26,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:42:26,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:42:26,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:42:26,540 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:42:26,541 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:42:26,541 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:42:26,541 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:42:26,542 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:42:26,542 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:42:26,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:42:26,542 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:42:26,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:42:26,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:42:26,543 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:42:26,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:42:26,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:42:26,544 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:42:26,544 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:42:26,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:42:26,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:42:26,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:42:26,545 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:42:26,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:42:26,545 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:42:26,546 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:42:26,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:42:26,546 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:42:26,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:42:26,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:42:26,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:42:26,739 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:42:26,739 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:42:26,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2024-01-31 16:42:27,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:42:28,116 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:42:28,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2024-01-31 16:42:28,128 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd93103eb/b9c190b37ba5461c8120762da216c66f/FLAGf42d7cd1b [2024-01-31 16:42:28,152 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd93103eb/b9c190b37ba5461c8120762da216c66f [2024-01-31 16:42:28,155 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:42:28,155 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:42:28,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/11_fmaxsymopt.yml/witness.yml [2024-01-31 16:42:28,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:42:28,276 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:42:28,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:42:28,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:42:28,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:42:28,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:42:28" (1/2) ... [2024-01-31 16:42:28,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143f936a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:42:28, skipping insertion in model container [2024-01-31 16:42:28,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:42:28" (1/2) ... [2024-01-31 16:42:28,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f6746aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:42:28, skipping insertion in model container [2024-01-31 16:42:28,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:28" (2/2) ... [2024-01-31 16:42:28,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143f936a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28, skipping insertion in model container [2024-01-31 16:42:28,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:28" (2/2) ... [2024-01-31 16:42:28,288 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:42:28,398 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:42:28,399 INFO L98 nessWitnessExtractor]: Location invariant before [L720-L720] ((((((-2147483646 <= i) && (offset <= 2147483645)) && ((0LL - (long long )e) + (long long )my_max >= 0LL)) && ((2LL - (long long )i) + (long long )offset >= 0LL)) && ((-2LL + (long long )i) - (long long )offset >= 0LL)) && (e == 0)) && (my_max == 0) [2024-01-31 16:42:28,400 INFO L98 nessWitnessExtractor]: Location invariant after [L704-L704] ((((((((((((4294967296LL + (long long )i) + (long long )my_max >= 0LL) && ((4294967296LL + (long long )e) + (long long )i >= 0LL)) && ((4294967296LL + (long long )e) + (long long )my_max >= 0LL)) && ((4294967295LL - (long long )i) + (long long )my_max >= 0LL)) && ((4294967295LL - (long long )e) + (long long )i >= 0LL)) && ((4294967295LL - (long long )e) + (long long )my_max >= 0LL)) && ((4294967295LL + (long long )i) - (long long )my_max >= 0LL)) && ((4294967295LL + (long long )e) - (long long )i >= 0LL)) && ((4294967295LL + (long long )e) - (long long )my_max >= 0LL)) && ((4294967294LL - (long long )i) - (long long )my_max >= 0LL)) && ((4294967294LL - (long long )e) - (long long )i >= 0LL)) && ((4294967294LL - (long long )e) - (long long )my_max >= 0LL) [2024-01-31 16:42:28,400 INFO L98 nessWitnessExtractor]: Location invariant after [L724-L724] (unsigned long )arg == 0UL [2024-01-31 16:42:28,437 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:42:28,691 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] [2024-01-31 16:42:28,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:42:28,708 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:42:28,763 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:42:28,770 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] Start Parsing Local [2024-01-31 16:42:28,807 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:42:28,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:42:28,832 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:42:28,832 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28 WrapperNode [2024-01-31 16:42:28,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:42:28,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:42:28,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:42:28,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:42:28,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,884 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 109 [2024-01-31 16:42:28,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:42:28,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:42:28,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:42:28,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:42:28,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,906 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,922 INFO L175 MemorySlicer]: Split 11 memory accesses to 3 slices as follows [2, 8, 1]. 73 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:42:28,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,946 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:42:28,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:42:28,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:42:28,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:42:28,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (1/1) ... [2024-01-31 16:42:28,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:42:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:28,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:42:28,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:42:29,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:42:29,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:42:29,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:42:29,013 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-31 16:42:29,013 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-31 16:42:29,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:42:29,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:42:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:42:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:42:29,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:42:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:42:29,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:42:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:42:29,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:42:29,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:42:29,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:42:29,020 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:42:29,163 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:42:29,164 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:42:29,329 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:42:29,329 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:42:29,428 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:42:29,428 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:42:29,429 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:42:29 BoogieIcfgContainer [2024-01-31 16:42:29,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:42:29,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:42:29,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:42:29,433 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:42:29,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:42:28" (1/4) ... [2024-01-31 16:42:29,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3659ad96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:42:29, skipping insertion in model container [2024-01-31 16:42:29,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:42:28" (2/4) ... [2024-01-31 16:42:29,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3659ad96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:42:29, skipping insertion in model container [2024-01-31 16:42:29,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:42:28" (3/4) ... [2024-01-31 16:42:29,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3659ad96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:42:29, skipping insertion in model container [2024-01-31 16:42:29,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:42:29" (4/4) ... [2024-01-31 16:42:29,437 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2024-01-31 16:42:29,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:42:29,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:42:29,452 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:42:29,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 25 transitions, 54 flow [2024-01-31 16:42:29,564 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-01-31 16:42:29,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:29,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-31 16:42:29,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 25 transitions, 54 flow [2024-01-31 16:42:29,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 25 transitions, 54 flow [2024-01-31 16:42:29,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:29,606 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@357fd0de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:29,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-31 16:42:29,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:29,614 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-01-31 16:42:29,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:29,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:29,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-01-31 16:42:29,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:29,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 842031874, now seen corresponding path program 1 times [2024-01-31 16:42:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378149215] [2024-01-31 16:42:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:29,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:29,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:29,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378149215] [2024-01-31 16:42:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378149215] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756718791] [2024-01-31 16:42:29,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:29,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:29,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-01-31 16:42:29,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:29,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:29,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-01-31 16:42:29,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:29,954 INFO L124 PetriNetUnfolderBase]: 25/75 cut-off events. [2024-01-31 16:42:29,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:29,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 75 events. 25/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 18 based on Foata normal form. 3/68 useless extension candidates. Maximal degree in co-relation 118. Up to 56 conditions per place. [2024-01-31 16:42:29,958 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-01-31 16:42:29,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 86 flow [2024-01-31 16:42:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:29,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-01-31 16:42:29,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-01-31 16:42:29,970 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 54 flow. Second operand 3 states and 41 transitions. [2024-01-31 16:42:29,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 86 flow [2024-01-31 16:42:29,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:29,973 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 62 flow [2024-01-31 16:42:29,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-01-31 16:42:29,977 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-01-31 16:42:29,977 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 62 flow [2024-01-31 16:42:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:29,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:29,978 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:29,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:42:29,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:29,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash -774991241, now seen corresponding path program 1 times [2024-01-31 16:42:29,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:29,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867555110] [2024-01-31 16:42:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867555110] [2024-01-31 16:42:30,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867555110] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158984324] [2024-01-31 16:42:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:30,077 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) [2024-01-31 16:42:30,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:42:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:30,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:30,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158984324] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:30,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:30,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:42:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215003329] [2024-01-31 16:42:30,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:42:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:42:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:42:30,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-01-31 16:42:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-01-31 16:42:30,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:30,259 INFO L124 PetriNetUnfolderBase]: 25/78 cut-off events. [2024-01-31 16:42:30,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:42:30,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 78 events. 25/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 18 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 140. Up to 56 conditions per place. [2024-01-31 16:42:30,270 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-01-31 16:42:30,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2024-01-31 16:42:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-01-31 16:42:30,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-31 16:42:30,283 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 62 flow. Second operand 6 states and 65 transitions. [2024-01-31 16:42:30,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2024-01-31 16:42:30,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:30,284 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-01-31 16:42:30,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-01-31 16:42:30,288 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-01-31 16:42:30,288 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-01-31 16:42:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:30,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:30,288 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:30,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:42:30,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:30,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:30,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1073420354, now seen corresponding path program 2 times [2024-01-31 16:42:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:30,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629556077] [2024-01-31 16:42:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629556077] [2024-01-31 16:42:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629556077] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627053103] [2024-01-31 16:42:30,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:30,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:30,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:30,595 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) [2024-01-31 16:42:30,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:42:30,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:42:30,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:30,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:30,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:42:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627053103] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:30,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:30,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-01-31 16:42:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049097719] [2024-01-31 16:42:30,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:42:30,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:42:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:42:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-01-31 16:42:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-01-31 16:42:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:30,738 INFO L124 PetriNetUnfolderBase]: 25/80 cut-off events. [2024-01-31 16:42:30,738 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 16:42:30,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 25/80 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 185 event pairs, 18 based on Foata normal form. 2/73 useless extension candidates. Maximal degree in co-relation 131. Up to 56 conditions per place. [2024-01-31 16:42:30,740 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-01-31 16:42:30,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2024-01-31 16:42:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-01-31 16:42:30,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 16:42:30,741 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 8 states and 80 transitions. [2024-01-31 16:42:30,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2024-01-31 16:42:30,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:30,743 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 116 flow [2024-01-31 16:42:30,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-01-31 16:42:30,744 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-01-31 16:42:30,744 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 116 flow [2024-01-31 16:42:30,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:30,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:30,744 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:30,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:30,956 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,SelfDestructingSolverStorable2 [2024-01-31 16:42:30,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-31 16:42:30,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash -337070366, now seen corresponding path program 3 times [2024-01-31 16:42:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:30,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916247829] [2024-01-31 16:42:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:30,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:30,990 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:31,013 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:31,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:31,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-31 16:42:31,021 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-01-31 16:42:31,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-31 16:42:31,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 5 remaining) [2024-01-31 16:42:31,022 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-31 16:42:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:42:31,022 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2024-01-31 16:42:31,024 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:31,024 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-31 16:42:31,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:31,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 96 flow [2024-01-31 16:42:31,058 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-01-31 16:42:31,058 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:42:31,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 7/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-01-31 16:42:31,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 96 flow [2024-01-31 16:42:31,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 96 flow [2024-01-31 16:42:31,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:31,062 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@357fd0de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:31,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-31 16:42:31,070 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:31,071 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 16:42:31,071 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:42:31,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:31,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:31,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:31,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1238664663, now seen corresponding path program 1 times [2024-01-31 16:42:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:31,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024033458] [2024-01-31 16:42:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:31,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:31,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:31,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024033458] [2024-01-31 16:42:31,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024033458] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:31,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:31,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682590757] [2024-01-31 16:42:31,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:31,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:31,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:31,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-01-31 16:42:31,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:31,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:31,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-01-31 16:42:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:31,330 INFO L124 PetriNetUnfolderBase]: 553/1116 cut-off events. [2024-01-31 16:42:31,330 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 16:42:31,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 1116 events. 553/1116 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5814 event pairs, 468 based on Foata normal form. 90/1046 useless extension candidates. Maximal degree in co-relation 1234. Up to 866 conditions per place. [2024-01-31 16:42:31,339 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-01-31 16:42:31,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 148 flow [2024-01-31 16:42:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-01-31 16:42:31,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-01-31 16:42:31,340 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 96 flow. Second operand 3 states and 71 transitions. [2024-01-31 16:42:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 148 flow [2024-01-31 16:42:31,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:31,342 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 102 flow [2024-01-31 16:42:31,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-01-31 16:42:31,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-01-31 16:42:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 102 flow [2024-01-31 16:42:31,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:31,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:31,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:42:31,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:31,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash -237904257, now seen corresponding path program 1 times [2024-01-31 16:42:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958845139] [2024-01-31 16:42:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:31,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:31,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958845139] [2024-01-31 16:42:31,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958845139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408588623] [2024-01-31 16:42:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:31,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:31,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:31,378 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) [2024-01-31 16:42:31,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:42:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:31,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:31,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:31,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408588623] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:31,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:42:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108247044] [2024-01-31 16:42:31,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:42:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:42:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:42:31,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-01-31 16:42:31,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:31,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-01-31 16:42:31,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:31,646 INFO L124 PetriNetUnfolderBase]: 553/1119 cut-off events. [2024-01-31 16:42:31,646 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-31 16:42:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 1119 events. 553/1119 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5814 event pairs, 468 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 2021. Up to 866 conditions per place. [2024-01-31 16:42:31,653 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 26 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-01-31 16:42:31,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 176 flow [2024-01-31 16:42:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-01-31 16:42:31,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-01-31 16:42:31,655 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 102 flow. Second operand 6 states and 112 transitions. [2024-01-31 16:42:31,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 176 flow [2024-01-31 16:42:31,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:31,658 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 134 flow [2024-01-31 16:42:31,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-01-31 16:42:31,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-01-31 16:42:31,661 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 134 flow [2024-01-31 16:42:31,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:31,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:31,661 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:31,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-31 16:42:31,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:31,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:31,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:31,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1630740567, now seen corresponding path program 2 times [2024-01-31 16:42:31,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560945905] [2024-01-31 16:42:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560945905] [2024-01-31 16:42:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560945905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359908042] [2024-01-31 16:42:31,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:42:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:31,941 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) [2024-01-31 16:42:31,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:42:32,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:42:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:42:32,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2024-01-31 16:42:32,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:42:32,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:42:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359908042] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:32,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:42:32,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-01-31 16:42:32,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919160005] [2024-01-31 16:42:32,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:32,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:32,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:42:32,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-01-31 16:42:32,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:32,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:32,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-01-31 16:42:32,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:32,224 INFO L124 PetriNetUnfolderBase]: 1037/1947 cut-off events. [2024-01-31 16:42:32,225 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-01-31 16:42:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3653 conditions, 1947 events. 1037/1947 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10960 event pairs, 418 based on Foata normal form. 0/1719 useless extension candidates. Maximal degree in co-relation 3618. Up to 840 conditions per place. [2024-01-31 16:42:32,238 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 51 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-01-31 16:42:32,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 289 flow [2024-01-31 16:42:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-01-31 16:42:32,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2024-01-31 16:42:32,241 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 134 flow. Second operand 3 states and 84 transitions. [2024-01-31 16:42:32,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 289 flow [2024-01-31 16:42:32,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 275 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:32,243 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 142 flow [2024-01-31 16:42:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-01-31 16:42:32,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-01-31 16:42:32,245 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 142 flow [2024-01-31 16:42:32,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:32,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:32,245 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:32,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:42:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:32,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:32,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash -416497854, now seen corresponding path program 1 times [2024-01-31 16:42:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424740856] [2024-01-31 16:42:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:32,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424740856] [2024-01-31 16:42:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424740856] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775833175] [2024-01-31 16:42:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:32,548 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) [2024-01-31 16:42:32,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:42:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:32,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:32,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:32,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 16:42:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775833175] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:32,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-01-31 16:42:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525487109] [2024-01-31 16:42:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:42:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:42:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:42:32,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-01-31 16:42:32,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 142 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:32,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:32,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-01-31 16:42:32,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:32,853 INFO L124 PetriNetUnfolderBase]: 984/1942 cut-off events. [2024-01-31 16:42:32,853 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2024-01-31 16:42:32,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 1942 events. 984/1942 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11364 event pairs, 818 based on Foata normal form. 2/1752 useless extension candidates. Maximal degree in co-relation 3741. Up to 1501 conditions per place. [2024-01-31 16:42:32,861 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 28 selfloop transitions, 7 changer transitions 0/48 dead transitions. [2024-01-31 16:42:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 224 flow [2024-01-31 16:42:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-01-31 16:42:32,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-01-31 16:42:32,864 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 142 flow. Second operand 8 states and 139 transitions. [2024-01-31 16:42:32,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 224 flow [2024-01-31 16:42:32,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:42:32,868 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 172 flow [2024-01-31 16:42:32,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-01-31 16:42:32,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-01-31 16:42:32,870 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 172 flow [2024-01-31 16:42:32,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:32,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:32,870 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-01-31 16:42:32,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:33,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-31 16:42:33,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1536571906, now seen corresponding path program 2 times [2024-01-31 16:42:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97469929] [2024-01-31 16:42:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:33,114 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:33,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:33,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:33,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 7 remaining) [2024-01-31 16:42:33,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-31 16:42:33,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:42:33,140 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-01-31 16:42:33,140 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:33,141 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-31 16:42:33,162 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 140 flow [2024-01-31 16:42:33,168 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-01-31 16:42:33,168 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:42:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 10/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 196 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-01-31 16:42:33,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 140 flow [2024-01-31 16:42:33,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 140 flow [2024-01-31 16:42:33,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:33,170 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@357fd0de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:33,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-31 16:42:33,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:33,172 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 16:42:33,172 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:42:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:33,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:33,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2116991034, now seen corresponding path program 1 times [2024-01-31 16:42:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684534007] [2024-01-31 16:42:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:33,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:33,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684534007] [2024-01-31 16:42:33,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684534007] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:33,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275657997] [2024-01-31 16:42:33,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:33,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:33,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-01-31 16:42:33,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:33,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:33,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-01-31 16:42:33,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:34,086 INFO L124 PetriNetUnfolderBase]: 8815/14502 cut-off events. [2024-01-31 16:42:34,087 INFO L125 PetriNetUnfolderBase]: For 700/700 co-relation queries the response was YES. [2024-01-31 16:42:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26905 conditions, 14502 events. 8815/14502 cut-off events. For 700/700 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 97895 event pairs, 7668 based on Foata normal form. 1544/14056 useless extension candidates. Maximal degree in co-relation 6142. Up to 11966 conditions per place. [2024-01-31 16:42:34,157 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-01-31 16:42:34,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 212 flow [2024-01-31 16:42:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-01-31 16:42:34,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2024-01-31 16:42:34,159 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 140 flow. Second operand 3 states and 101 transitions. [2024-01-31 16:42:34,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 212 flow [2024-01-31 16:42:34,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:34,161 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-01-31 16:42:34,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-01-31 16:42:34,161 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-01-31 16:42:34,161 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-01-31 16:42:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:34,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:34,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:34,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:42:34,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:34,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash 237211597, now seen corresponding path program 1 times [2024-01-31 16:42:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743259666] [2024-01-31 16:42:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743259666] [2024-01-31 16:42:34,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743259666] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687962679] [2024-01-31 16:42:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:34,191 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) [2024-01-31 16:42:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:42:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:34,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:34,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:34,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687962679] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:34,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:34,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:42:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792372315] [2024-01-31 16:42:34,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:42:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:34,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:42:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:42:34,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-01-31 16:42:34,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:34,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:34,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-01-31 16:42:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:35,322 INFO L124 PetriNetUnfolderBase]: 8815/14505 cut-off events. [2024-01-31 16:42:35,323 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2024-01-31 16:42:35,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26821 conditions, 14505 events. 8815/14505 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 97922 event pairs, 7668 based on Foata normal form. 0/12515 useless extension candidates. Maximal degree in co-relation 26807. Up to 11966 conditions per place. [2024-01-31 16:42:35,382 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-01-31 16:42:35,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 238 flow [2024-01-31 16:42:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:42:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:42:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-01-31 16:42:35,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2024-01-31 16:42:35,384 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 6 states and 159 transitions. [2024-01-31 16:42:35,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 238 flow [2024-01-31 16:42:35,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:35,386 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 174 flow [2024-01-31 16:42:35,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-01-31 16:42:35,387 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-01-31 16:42:35,387 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 174 flow [2024-01-31 16:42:35,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:35,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:35,387 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:35,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:35,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:35,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1081181434, now seen corresponding path program 2 times [2024-01-31 16:42:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401197446] [2024-01-31 16:42:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:42:35,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:35,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401197446] [2024-01-31 16:42:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401197446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:35,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:35,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:42:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101641791] [2024-01-31 16:42:35,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:35,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-01-31 16:42:35,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:35,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:35,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-01-31 16:42:35,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:37,319 INFO L124 PetriNetUnfolderBase]: 16361/25752 cut-off events. [2024-01-31 16:42:37,319 INFO L125 PetriNetUnfolderBase]: For 660/660 co-relation queries the response was YES. [2024-01-31 16:42:37,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48579 conditions, 25752 events. 16361/25752 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 181335 event pairs, 6868 based on Foata normal form. 0/22701 useless extension candidates. Maximal degree in co-relation 48543. Up to 11430 conditions per place. [2024-01-31 16:42:37,484 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 73 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-01-31 16:42:37,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 400 flow [2024-01-31 16:42:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:37,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-01-31 16:42:37,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-01-31 16:42:37,487 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 174 flow. Second operand 3 states and 124 transitions. [2024-01-31 16:42:37,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 400 flow [2024-01-31 16:42:37,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 386 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:37,490 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 182 flow [2024-01-31 16:42:37,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-01-31 16:42:37,490 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-01-31 16:42:37,491 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 182 flow [2024-01-31 16:42:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:37,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:37,491 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:37,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:42:37,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:37,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1770744719, now seen corresponding path program 1 times [2024-01-31 16:42:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422856361] [2024-01-31 16:42:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 16:42:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422856361] [2024-01-31 16:42:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422856361] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:37,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:42:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539145711] [2024-01-31 16:42:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:37,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:37,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:37,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-01-31 16:42:37,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:37,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:37,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-01-31 16:42:37,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:40,117 INFO L124 PetriNetUnfolderBase]: 28355/43911 cut-off events. [2024-01-31 16:42:40,117 INFO L125 PetriNetUnfolderBase]: For 5784/5784 co-relation queries the response was YES. [2024-01-31 16:42:40,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86812 conditions, 43911 events. 28355/43911 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 322631 event pairs, 11890 based on Foata normal form. 0/39933 useless extension candidates. Maximal degree in co-relation 86781. Up to 19626 conditions per place. [2024-01-31 16:42:40,541 INFO L140 encePairwiseOnDemand]: 57/61 looper letters, 76 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2024-01-31 16:42:40,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 423 flow [2024-01-31 16:42:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-01-31 16:42:40,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6721311475409836 [2024-01-31 16:42:40,557 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 182 flow. Second operand 3 states and 123 transitions. [2024-01-31 16:42:40,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 423 flow [2024-01-31 16:42:40,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:42:40,582 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 198 flow [2024-01-31 16:42:40,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-01-31 16:42:40,582 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-01-31 16:42:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 198 flow [2024-01-31 16:42:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:40,583 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:40,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:42:40,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:40,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1140634507, now seen corresponding path program 1 times [2024-01-31 16:42:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414315232] [2024-01-31 16:42:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:42:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:40,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414315232] [2024-01-31 16:42:40,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414315232] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:40,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:42:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6521563] [2024-01-31 16:42:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:40,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:40,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-01-31 16:42:40,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:40,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:40,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-01-31 16:42:40,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:42,704 INFO L124 PetriNetUnfolderBase]: 19866/32373 cut-off events. [2024-01-31 16:42:42,704 INFO L125 PetriNetUnfolderBase]: For 5638/5638 co-relation queries the response was YES. [2024-01-31 16:42:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65286 conditions, 32373 events. 19866/32373 cut-off events. For 5638/5638 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 245399 event pairs, 13596 based on Foata normal form. 564/30366 useless extension candidates. Maximal degree in co-relation 65254. Up to 22692 conditions per place. [2024-01-31 16:42:42,928 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 71 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-01-31 16:42:42,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 412 flow [2024-01-31 16:42:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-01-31 16:42:42,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557377049180327 [2024-01-31 16:42:42,930 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 198 flow. Second operand 3 states and 120 transitions. [2024-01-31 16:42:42,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 412 flow [2024-01-31 16:42:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 400 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-31 16:42:43,031 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 194 flow [2024-01-31 16:42:43,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-01-31 16:42:43,032 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2024-01-31 16:42:43,032 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 194 flow [2024-01-31 16:42:43,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:43,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:43,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:43,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:42:43,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:43,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1976085545, now seen corresponding path program 1 times [2024-01-31 16:42:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:43,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22490789] [2024-01-31 16:42:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:43,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:43,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:43,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22490789] [2024-01-31 16:42:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22490789] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:43,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147630817] [2024-01-31 16:42:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:43,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:43,083 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) [2024-01-31 16:42:43,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:42:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:43,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:42:43,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:43,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:42:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147630817] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:43,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-01-31 16:42:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201598351] [2024-01-31 16:42:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:42:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:43,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:42:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:42:43,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-01-31 16:42:43,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 194 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:43,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:43,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-01-31 16:42:43,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:45,027 INFO L124 PetriNetUnfolderBase]: 18446/30630 cut-off events. [2024-01-31 16:42:45,027 INFO L125 PetriNetUnfolderBase]: For 6735/6735 co-relation queries the response was YES. [2024-01-31 16:42:45,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62556 conditions, 30630 events. 18446/30630 cut-off events. For 6735/6735 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 233459 event pairs, 16009 based on Foata normal form. 2/27938 useless extension candidates. Maximal degree in co-relation 62515. Up to 24750 conditions per place. [2024-01-31 16:42:45,214 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 41 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-01-31 16:42:45,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 302 flow [2024-01-31 16:42:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:42:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:42:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-01-31 16:42:45,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057377049180328 [2024-01-31 16:42:45,216 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 194 flow. Second operand 8 states and 198 transitions. [2024-01-31 16:42:45,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 302 flow [2024-01-31 16:42:45,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 66 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:42:45,262 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 228 flow [2024-01-31 16:42:45,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=228, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-01-31 16:42:45,262 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-01-31 16:42:45,263 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 228 flow [2024-01-31 16:42:45,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:45,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:45,263 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:45,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 16:42:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:45,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 16:42:45,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1290298825, now seen corresponding path program 2 times [2024-01-31 16:42:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:45,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913353525] [2024-01-31 16:42:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:45,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 16:42:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 16:42:45,545 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 16:42:45,545 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 9 remaining) [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 9 remaining) [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2024-01-31 16:42:45,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 9 remaining) [2024-01-31 16:42:45,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2024-01-31 16:42:45,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 9 remaining) [2024-01-31 16:42:45,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2024-01-31 16:42:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:42:45,547 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-01-31 16:42:45,548 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-31 16:42:45,548 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-31 16:42:45,797 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:42:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 186 flow [2024-01-31 16:42:45,806 INFO L124 PetriNetUnfolderBase]: 13/90 cut-off events. [2024-01-31 16:42:45,807 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-31 16:42:45,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 13/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 267 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-01-31 16:42:45,807 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 186 flow [2024-01-31 16:42:45,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 186 flow [2024-01-31 16:42:45,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:42:45,812 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@357fd0de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:42:45,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-01-31 16:42:45,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:42:45,814 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 16:42:45,814 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:42:45,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:45,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:45,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:45,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1811717003, now seen corresponding path program 1 times [2024-01-31 16:42:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:45,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264362112] [2024-01-31 16:42:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:45,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:45,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264362112] [2024-01-31 16:42:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264362112] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:42:45,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:42:45,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:42:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810237673] [2024-01-31 16:42:45,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:42:45,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:42:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:42:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:42:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-01-31 16:42:45,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:45,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:45,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-01-31 16:42:45,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:42:56,653 INFO L124 PetriNetUnfolderBase]: 121435/178271 cut-off events. [2024-01-31 16:42:56,653 INFO L125 PetriNetUnfolderBase]: For 12016/12016 co-relation queries the response was YES. [2024-01-31 16:42:56,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336675 conditions, 178271 events. 121435/178271 cut-off events. For 12016/12016 co-relation queries the response was YES. Maximal size of possible extension queue 4329. Compared 1378019 event pairs, 106668 based on Foata normal form. 22090/177104 useless extension candidates. Maximal degree in co-relation 27005. Up to 152966 conditions per place. [2024-01-31 16:42:57,829 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-01-31 16:42:57,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 278 flow [2024-01-31 16:42:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:42:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:42:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-01-31 16:42:57,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2024-01-31 16:42:57,831 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 186 flow. Second operand 3 states and 131 transitions. [2024-01-31 16:42:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 278 flow [2024-01-31 16:42:57,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 272 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 16:42:57,848 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 182 flow [2024-01-31 16:42:57,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-01-31 16:42:57,850 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-01-31 16:42:57,850 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 182 flow [2024-01-31 16:42:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:57,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:42:57,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:42:57,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:42:57,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thr1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2024-01-31 16:42:57,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:42:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1123044243, now seen corresponding path program 1 times [2024-01-31 16:42:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:42:57,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030259604] [2024-01-31 16:42:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:42:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:57,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:42:57,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030259604] [2024-01-31 16:42:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030259604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:42:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661690088] [2024-01-31 16:42:57,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:42:57,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:42:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:42:57,900 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) [2024-01-31 16:42:57,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:42:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:42:57,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:42:57,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:42:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:58,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:42:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:42:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661690088] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:42:58,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:42:58,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-01-31 16:42:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006538934] [2024-01-31 16:42:58,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:42:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:42:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:42:58,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:42:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:42:58,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-01-31 16:42:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:42:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:42:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-01-31 16:42:58,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand