./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c --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/chl-chromosome-symm.wvr.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/weaver/chl-chromosome-symm.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-chromosome-symm.wvr.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 16:46:42,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:46:42,465 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:46:42,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:46:42,469 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:46:42,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:46:42,491 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:46:42,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:46:42,491 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:46:42,494 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:46:42,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:46:42,495 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:46:42,495 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:46:42,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:46:42,496 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:46:42,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:46:42,497 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:46:42,497 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:46:42,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:46:42,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:46:42,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:46:42,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:46:42,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:46:42,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:46:42,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:46:42,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:46:42,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:46:42,499 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:46:42,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:46:42,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:46:42,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:46:42,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:46:42,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:42,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:46:42,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:46:42,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:46:42,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:46:42,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:46:42,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:46:42,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:46:42,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:46:42,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:46:42,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:46:42,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:46:42,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:46:42,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:46:42,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:46:42,749 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:46:42,749 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:46:42,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-01-31 16:46:43,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:46:43,913 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:46:43,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2024-01-31 16:46:43,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a965eac2/7a925299d96543c9a87aec299a6a37a1/FLAG7d8043ce3 [2024-01-31 16:46:43,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a965eac2/7a925299d96543c9a87aec299a6a37a1 [2024-01-31 16:46:43,934 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:46:43,935 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:46:43,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-chromosome-symm.wvr.yml/witness.yml [2024-01-31 16:46:44,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:46:44,045 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:46:44,046 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:44,046 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:46:44,049 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:46:44,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:43" (1/2) ... [2024-01-31 16:46:44,051 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c3af08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:44, skipping insertion in model container [2024-01-31 16:46:44,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:43" (1/2) ... [2024-01-31 16:46:44,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@409bb866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:44, skipping insertion in model container [2024-01-31 16:46:44,052 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:44" (2/2) ... [2024-01-31 16:46:44,052 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c3af08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:44, skipping insertion in model container [2024-01-31 16:46:44,053 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:44" (2/2) ... [2024-01-31 16:46:44,053 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:46:44,104 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:46:44,108 INFO L98 nessWitnessExtractor]: Location invariant after [L50-L50] ((((((2147483648LL + (long long )i) + (long long )stop >= 0LL) && ((2147483647LL - (long long )i) + (long long )stop >= 0LL)) && ((2147483649LL + (long long )i) - (long long )stop >= 0LL)) && ((2147483648LL - (long long )i) - (long long )stop >= 0LL)) && ((unsigned long )_argptr == 0UL)) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:46:44,108 INFO L98 nessWitnessExtractor]: Location invariant after [L64-L64] ((((((2147483648LL + (long long )i) + (long long )stop >= 0LL) && ((2147483647LL - (long long )i) + (long long )stop >= 0LL)) && ((2147483649LL + (long long )i) - (long long )stop >= 0LL)) && ((2147483648LL - (long long )i) - (long long )stop >= 0LL)) && ((unsigned long )_argptr == 0UL)) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:46:44,108 INFO L98 nessWitnessExtractor]: Location invariant after [L66-L66] ((unsigned long )_argptr == 0UL) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:46:44,108 INFO L98 nessWitnessExtractor]: Location invariant after [L52-L52] ((unsigned long )_argptr == 0UL) && (stop == (_Bool)0 || stop == (_Bool)1) [2024-01-31 16:46:44,128 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:46:44,291 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-01-31 16:46:44,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:44,315 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:46:44,325 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:46:44,326 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:44,327 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:46:44,328 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:44,333 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-01-31 16:46:44,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:44,350 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:46:44,351 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:44 WrapperNode [2024-01-31 16:46:44,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:44,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:44,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:46:44,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:46:44,357 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,366 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,386 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 201 [2024-01-31 16:46:44,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:44,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:46:44,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:46:44,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:46:44,397 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,397 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,402 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,414 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 6, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-31 16:46:44,415 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,415 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,423 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,426 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,427 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,429 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:46:44,431 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:46:44,431 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:46:44,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:46:44,432 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 04:46:44" (1/1) ... [2024-01-31 16:46:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:44,463 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 16:46:44,477 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 16:46:44,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:46:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:46:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:46:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:46:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:46:44,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:46:44,527 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:46:44,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:46:44,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:46:44,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:46:44,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:46:44,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:46:44,530 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 16:46:44,637 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:46:44,639 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:46:44,939 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:46:44,939 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:46:45,140 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:46:45,140 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 16:46:45,141 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:45 BoogieIcfgContainer [2024-01-31 16:46:45,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:46:45,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:46:45,145 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:46:45,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:46:45,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:43" (1/4) ... [2024-01-31 16:46:45,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3a73db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:45, skipping insertion in model container [2024-01-31 16:46:45,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:44" (2/4) ... [2024-01-31 16:46:45,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3a73db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:45, skipping insertion in model container [2024-01-31 16:46:45,149 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 04:46:44" (3/4) ... [2024-01-31 16:46:45,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3a73db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:45, skipping insertion in model container [2024-01-31 16:46:45,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:45" (4/4) ... [2024-01-31 16:46:45,151 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-01-31 16:46:45,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:46:45,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:46:45,165 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:46:45,201 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:46:45,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 23 transitions, 60 flow [2024-01-31 16:46:45,259 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-01-31 16:46:45,260 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:45,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 4/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-01-31 16:46:45,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 23 transitions, 60 flow [2024-01-31 16:46:45,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 20 transitions, 52 flow [2024-01-31 16:46:45,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:46:45,285 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;@3b9c5005, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:46:45,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 16:46:45,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:46:45,296 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2024-01-31 16:46:45,296 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:45,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:45,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:45,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:45,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1874240486, now seen corresponding path program 1 times [2024-01-31 16:46:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:45,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060814054] [2024-01-31 16:46:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:45,553 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 16:46:45,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:45,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060814054] [2024-01-31 16:46:45,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060814054] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:45,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:45,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:46:45,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989807399] [2024-01-31 16:46:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:46:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:46:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:46:45,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:45,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 16:46:45,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:45,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:45,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:45,693 INFO L124 PetriNetUnfolderBase]: 42/80 cut-off events. [2024-01-31 16:46:45,693 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-31 16:46:45,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 80 events. 42/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 120. Up to 78 conditions per place. [2024-01-31 16:46:45,695 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2024-01-31 16:46:45,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2024-01-31 16:46:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:46:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:46:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 32 transitions. [2024-01-31 16:46:45,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-01-31 16:46:45,706 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 32 transitions. [2024-01-31 16:46:45,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 98 flow [2024-01-31 16:46:45,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:45,709 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2024-01-31 16:46:45,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2024-01-31 16:46:45,714 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-01-31 16:46:45,714 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2024-01-31 16:46:45,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 16:46:45,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:45,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:46:45,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:45,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:45,716 INFO L85 PathProgramCache]: Analyzing trace with hash 391187536, now seen corresponding path program 1 times [2024-01-31 16:46:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:45,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112051904] [2024-01-31 16:46:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:45,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:45,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:45,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112051904] [2024-01-31 16:46:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112051904] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:45,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635834840] [2024-01-31 16:46:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:45,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:45,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:45,837 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 16:46:45,869 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 16:46:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:46:45,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:45,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635834840] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:45,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:45,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-01-31 16:46:45,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157108448] [2024-01-31 16:46:45,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:45,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:46:45,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:45,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 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 16:46:45,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:45,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:45,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:46,045 INFO L124 PetriNetUnfolderBase]: 42/86 cut-off events. [2024-01-31 16:46:46,045 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:46:46,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 86 events. 42/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 129 event pairs, 24 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 164. Up to 78 conditions per place. [2024-01-31 16:46:46,046 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 17 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2024-01-31 16:46:46,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 144 flow [2024-01-31 16:46:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 51 transitions. [2024-01-31 16:46:46,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-01-31 16:46:46,048 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 51 transitions. [2024-01-31 16:46:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 144 flow [2024-01-31 16:46:46,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:46,049 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2024-01-31 16:46:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2024-01-31 16:46:46,050 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2024-01-31 16:46:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2024-01-31 16:46:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 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 16:46:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:46,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:46,261 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 16:46:46,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:46,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash -355590994, now seen corresponding path program 2 times [2024-01-31 16:46:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907290107] [2024-01-31 16:46:46,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907290107] [2024-01-31 16:46:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907290107] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552601295] [2024-01-31 16:46:46,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:46,381 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 16:46:46,408 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 16:46:46,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:46,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:46:46,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:46:46,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:46,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552601295] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:46,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:46,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-31 16:46:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277126474] [2024-01-31 16:46:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:46:46,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:46,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:46,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:46,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:46,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:46,570 INFO L124 PetriNetUnfolderBase]: 66/135 cut-off events. [2024-01-31 16:46:46,571 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:46:46,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 135 events. 66/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 318 event pairs, 24 based on Foata normal form. 4/108 useless extension candidates. Maximal degree in co-relation 254. Up to 86 conditions per place. [2024-01-31 16:46:46,572 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 39 selfloop transitions, 3 changer transitions 2/45 dead transitions. [2024-01-31 16:46:46,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 254 flow [2024-01-31 16:46:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-01-31 16:46:46,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-31 16:46:46,573 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 49 transitions. [2024-01-31 16:46:46,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 254 flow [2024-01-31 16:46:46,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 45 transitions, 238 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:46,575 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2024-01-31 16:46:46,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-31 16:46:46,576 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2024-01-31 16:46:46,576 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2024-01-31 16:46:46,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:46,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,577 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:46,590 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 16:46:46,788 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 16:46:46,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash 207705142, now seen corresponding path program 3 times [2024-01-31 16:46:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027156795] [2024-01-31 16:46:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:46,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027156795] [2024-01-31 16:46:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027156795] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646048642] [2024-01-31 16:46:46,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:46,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:46,974 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 16:46:46,975 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 16:46:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:46:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:47,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-31 16:46:47,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-31 16:46:47,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:47,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646048642] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:47,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:47,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-01-31 16:46:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30202598] [2024-01-31 16:46:47,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-31 16:46:47,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:47,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:47,162 INFO L124 PetriNetUnfolderBase]: 102/205 cut-off events. [2024-01-31 16:46:47,162 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-01-31 16:46:47,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 205 events. 102/205 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 605 event pairs, 42 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 484. Up to 138 conditions per place. [2024-01-31 16:46:47,164 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 45 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-01-31 16:46:47,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 294 flow [2024-01-31 16:46:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-01-31 16:46:47,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-01-31 16:46:47,165 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 47 transitions. [2024-01-31 16:46:47,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 294 flow [2024-01-31 16:46:47,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 283 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:47,167 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 148 flow [2024-01-31 16:46:47,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-31 16:46:47,168 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2024-01-31 16:46:47,168 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 148 flow [2024-01-31 16:46:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:47,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:47,168 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:47,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:47,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 810424690, now seen corresponding path program 4 times [2024-01-31 16:46:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:47,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053242973] [2024-01-31 16:46:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053242973] [2024-01-31 16:46:47,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053242973] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:47,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80133655] [2024-01-31 16:46:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:46:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:47,500 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 16:46:47,525 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 16:46:47,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:46:47,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:47,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:46:47,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:47,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:46:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80133655] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:47,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:47,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 16:46:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083628851] [2024-01-31 16:46:47,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:47,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:46:47,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:46:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:47,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:47,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 148 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 16:46:47,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:47,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:47,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:47,757 INFO L124 PetriNetUnfolderBase]: 102/207 cut-off events. [2024-01-31 16:46:47,758 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-01-31 16:46:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 207 events. 102/207 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 574 event pairs, 74 based on Foata normal form. 1/181 useless extension candidates. Maximal degree in co-relation 564. Up to 194 conditions per place. [2024-01-31 16:46:47,759 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 21 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2024-01-31 16:46:47,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 226 flow [2024-01-31 16:46:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2024-01-31 16:46:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-01-31 16:46:47,761 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 148 flow. Second operand 7 states and 52 transitions. [2024-01-31 16:46:47,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 226 flow [2024-01-31 16:46:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:47,763 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 190 flow [2024-01-31 16:46:47,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-01-31 16:46:47,763 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2024-01-31 16:46:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 190 flow [2024-01-31 16:46:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 16:46:47,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:47,764 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:47,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:47,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:47,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:47,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 916282052, now seen corresponding path program 5 times [2024-01-31 16:46:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:47,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381253889] [2024-01-31 16:46:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:47,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381253889] [2024-01-31 16:46:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381253889] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:48,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18051262] [2024-01-31 16:46:48,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:48,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:48,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:48,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:48,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:48,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:48,217 INFO L124 PetriNetUnfolderBase]: 118/235 cut-off events. [2024-01-31 16:46:48,217 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-01-31 16:46:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 235 events. 118/235 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 772 event pairs, 14 based on Foata normal form. 12/219 useless extension candidates. Maximal degree in co-relation 606. Up to 188 conditions per place. [2024-01-31 16:46:48,220 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 43 selfloop transitions, 5 changer transitions 1/50 dead transitions. [2024-01-31 16:46:48,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 342 flow [2024-01-31 16:46:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-01-31 16:46:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-01-31 16:46:48,221 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 190 flow. Second operand 4 states and 44 transitions. [2024-01-31 16:46:48,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 342 flow [2024-01-31 16:46:48,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 318 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:48,223 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 197 flow [2024-01-31 16:46:48,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-01-31 16:46:48,224 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2024-01-31 16:46:48,224 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 197 flow [2024-01-31 16:46:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:48,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:48,224 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:48,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:46:48,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:48,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -220250244, now seen corresponding path program 6 times [2024-01-31 16:46:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549328215] [2024-01-31 16:46:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549328215] [2024-01-31 16:46:48,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549328215] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:48,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:48,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577691380] [2024-01-31 16:46:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:48,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:48,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:48,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:48,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:48,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:48,391 INFO L124 PetriNetUnfolderBase]: 114/224 cut-off events. [2024-01-31 16:46:48,391 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2024-01-31 16:46:48,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 224 events. 114/224 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 652 event pairs, 24 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 647. Up to 162 conditions per place. [2024-01-31 16:46:48,393 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 42 selfloop transitions, 6 changer transitions 1/50 dead transitions. [2024-01-31 16:46:48,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 351 flow [2024-01-31 16:46:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-01-31 16:46:48,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45652173913043476 [2024-01-31 16:46:48,394 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 197 flow. Second operand 4 states and 42 transitions. [2024-01-31 16:46:48,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 351 flow [2024-01-31 16:46:48,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 50 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:48,396 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 230 flow [2024-01-31 16:46:48,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-01-31 16:46:48,396 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2024-01-31 16:46:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 230 flow [2024-01-31 16:46:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 16:46:48,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:48,397 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:46:48,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:48,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -957448498, now seen corresponding path program 1 times [2024-01-31 16:46:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:48,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574262799] [2024-01-31 16:46:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:48,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-31 16:46:48,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:48,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574262799] [2024-01-31 16:46:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574262799] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:48,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530045766] [2024-01-31 16:46:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:48,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:48,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 16:46:48,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:48,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:48,584 INFO L124 PetriNetUnfolderBase]: 99/194 cut-off events. [2024-01-31 16:46:48,584 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2024-01-31 16:46:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 194 events. 99/194 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 517 event pairs, 36 based on Foata normal form. 6/174 useless extension candidates. Maximal degree in co-relation 617. Up to 148 conditions per place. [2024-01-31 16:46:48,586 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 43 selfloop transitions, 6 changer transitions 3/53 dead transitions. [2024-01-31 16:46:48,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 399 flow [2024-01-31 16:46:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-01-31 16:46:48,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 16:46:48,587 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 230 flow. Second operand 4 states and 46 transitions. [2024-01-31 16:46:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 399 flow [2024-01-31 16:46:48,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:48,589 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 251 flow [2024-01-31 16:46:48,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-01-31 16:46:48,590 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-01-31 16:46:48,590 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 251 flow [2024-01-31 16:46:48,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 16:46:48,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:48,590 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:48,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:46:48,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:48,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1695590835, now seen corresponding path program 1 times [2024-01-31 16:46:48,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016665345] [2024-01-31 16:46:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-31 16:46:48,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:48,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016665345] [2024-01-31 16:46:48,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016665345] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:48,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:48,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006739594] [2024-01-31 16:46:48,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:48,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:48,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 16:46:48,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:48,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:48,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:48,810 INFO L124 PetriNetUnfolderBase]: 85/163 cut-off events. [2024-01-31 16:46:48,810 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-01-31 16:46:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 163 events. 85/163 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 376 event pairs, 29 based on Foata normal form. 8/147 useless extension candidates. Maximal degree in co-relation 554. Up to 125 conditions per place. [2024-01-31 16:46:48,812 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 44 selfloop transitions, 7 changer transitions 1/53 dead transitions. [2024-01-31 16:46:48,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 419 flow [2024-01-31 16:46:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-01-31 16:46:48,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 16:46:48,813 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 251 flow. Second operand 4 states and 46 transitions. [2024-01-31 16:46:48,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 419 flow [2024-01-31 16:46:48,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 393 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:48,815 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 264 flow [2024-01-31 16:46:48,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-01-31 16:46:48,815 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2024-01-31 16:46:48,816 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 264 flow [2024-01-31 16:46:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 16:46:48,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:48,816 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:48,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:46:48,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:48,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:48,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1557131379, now seen corresponding path program 1 times [2024-01-31 16:46:48,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:48,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564175942] [2024-01-31 16:46:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:48,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564175942] [2024-01-31 16:46:49,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564175942] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873389552] [2024-01-31 16:46:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:49,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:49,405 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 16:46:49,446 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 16:46:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:49,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:46:49,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:49,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:49,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-31 16:46:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:49,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:49,997 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:46:49,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-01-31 16:46:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:50,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873389552] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:50,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-01-31 16:46:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351576497] [2024-01-31 16:46:50,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:50,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:46:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:46:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:46:50,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:50,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 264 flow. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:46:50,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:50,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:50,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:50,495 INFO L124 PetriNetUnfolderBase]: 152/284 cut-off events. [2024-01-31 16:46:50,495 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-01-31 16:46:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 284 events. 152/284 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 900 event pairs, 15 based on Foata normal form. 1/231 useless extension candidates. Maximal degree in co-relation 949. Up to 109 conditions per place. [2024-01-31 16:46:50,497 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 59 selfloop transitions, 20 changer transitions 4/84 dead transitions. [2024-01-31 16:46:50,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 604 flow [2024-01-31 16:46:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:46:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:46:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 101 transitions. [2024-01-31 16:46:50,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36594202898550726 [2024-01-31 16:46:50,499 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 264 flow. Second operand 12 states and 101 transitions. [2024-01-31 16:46:50,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 604 flow [2024-01-31 16:46:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 570 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:50,501 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 374 flow [2024-01-31 16:46:50,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=374, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2024-01-31 16:46:50,502 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 40 predicate places. [2024-01-31 16:46:50,502 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 374 flow [2024-01-31 16:46:50,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:46:50,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:50,502 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:50,522 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 16:46:50,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-31 16:46:50,714 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:50,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash 63224523, now seen corresponding path program 2 times [2024-01-31 16:46:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:50,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764548480] [2024-01-31 16:46:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:50,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764548480] [2024-01-31 16:46:51,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764548480] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:51,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461604777] [2024-01-31 16:46:51,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:51,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:51,254 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 16:46:51,294 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 16:46:51,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:51,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:46:51,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:51,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:51,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:46:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:51,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:51,791 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:46:51,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:46:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:51,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461604777] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:51,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:51,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-01-31 16:46:51,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074359453] [2024-01-31 16:46:51,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:51,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:46:51,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:46:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:46:51,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:51,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 374 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:46:51,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:51,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:51,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:52,222 INFO L124 PetriNetUnfolderBase]: 174/323 cut-off events. [2024-01-31 16:46:52,223 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2024-01-31 16:46:52,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1279 conditions, 323 events. 174/323 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1072 event pairs, 30 based on Foata normal form. 1/298 useless extension candidates. Maximal degree in co-relation 1199. Up to 246 conditions per place. [2024-01-31 16:46:52,225 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 52 selfloop transitions, 23 changer transitions 4/80 dead transitions. [2024-01-31 16:46:52,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 652 flow [2024-01-31 16:46:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:46:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:46:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 94 transitions. [2024-01-31 16:46:52,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31438127090301005 [2024-01-31 16:46:52,226 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 374 flow. Second operand 13 states and 94 transitions. [2024-01-31 16:46:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 652 flow [2024-01-31 16:46:52,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 623 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:52,229 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 480 flow [2024-01-31 16:46:52,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=480, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-01-31 16:46:52,230 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 53 predicate places. [2024-01-31 16:46:52,230 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 480 flow [2024-01-31 16:46:52,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:46:52,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:52,230 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:52,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-31 16:46:52,437 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 16:46:52,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:52,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 774167091, now seen corresponding path program 3 times [2024-01-31 16:46:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:52,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849325837] [2024-01-31 16:46:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849325837] [2024-01-31 16:46:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849325837] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433731120] [2024-01-31 16:46:52,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:52,921 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 16:46:52,933 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 16:46:53,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:46:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:53,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:46:53,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:53,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:53,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:46:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:53,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:53,433 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:46:53,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:46:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:53,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433731120] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:53,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:53,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-01-31 16:46:53,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858366051] [2024-01-31 16:46:53,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:53,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:46:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:46:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:46:53,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:53,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 480 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:46:53,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:53,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:53,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:53,914 INFO L124 PetriNetUnfolderBase]: 176/332 cut-off events. [2024-01-31 16:46:53,914 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2024-01-31 16:46:53,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 332 events. 176/332 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1157 event pairs, 34 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1378. Up to 242 conditions per place. [2024-01-31 16:46:53,916 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 52 selfloop transitions, 23 changer transitions 5/81 dead transitions. [2024-01-31 16:46:53,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 716 flow [2024-01-31 16:46:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:46:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:46:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-01-31 16:46:53,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-31 16:46:53,917 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 480 flow. Second operand 12 states and 90 transitions. [2024-01-31 16:46:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 716 flow [2024-01-31 16:46:53,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 666 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:53,921 INFO L231 Difference]: Finished difference. Result has 82 places, 61 transitions, 491 flow [2024-01-31 16:46:53,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=491, PETRI_PLACES=82, PETRI_TRANSITIONS=61} [2024-01-31 16:46:53,922 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2024-01-31 16:46:53,922 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 61 transitions, 491 flow [2024-01-31 16:46:53,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:46:53,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:53,923 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:53,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 16:46:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:54,137 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:54,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:54,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1452210005, now seen corresponding path program 4 times [2024-01-31 16:46:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063128602] [2024-01-31 16:46:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:46:55,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063128602] [2024-01-31 16:46:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063128602] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347214050] [2024-01-31 16:46:55,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:46:55,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:55,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:55,082 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 16:46:55,122 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 16:46:55,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:46:55,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:55,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:46:55,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:55,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:55,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-31 16:46:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:55,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:55,594 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:46:55,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:46:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:55,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347214050] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:55,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:55,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-01-31 16:46:55,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433363734] [2024-01-31 16:46:55,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:55,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:46:55,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:46:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:46:55,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:55,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 61 transitions, 491 flow. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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 16:46:55,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:55,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:55,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:56,348 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-01-31 16:46:56,348 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-01-31 16:46:56,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 361 events. 192/361 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1303 event pairs, 36 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 1511. Up to 272 conditions per place. [2024-01-31 16:46:56,351 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 50 selfloop transitions, 35 changer transitions 3/89 dead transitions. [2024-01-31 16:46:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 803 flow [2024-01-31 16:46:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:46:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:46:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 116 transitions. [2024-01-31 16:46:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2966751918158568 [2024-01-31 16:46:56,352 INFO L175 Difference]: Start difference. First operand has 82 places, 61 transitions, 491 flow. Second operand 17 states and 116 transitions. [2024-01-31 16:46:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 803 flow [2024-01-31 16:46:56,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 757 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-01-31 16:46:56,356 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 611 flow [2024-01-31 16:46:56,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=611, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2024-01-31 16:46:56,357 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 68 predicate places. [2024-01-31 16:46:56,357 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 611 flow [2024-01-31 16:46:56,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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 16:46:56,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:56,357 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:56,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:46:56,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 16:46:56,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:56,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:56,570 INFO L85 PathProgramCache]: Analyzing trace with hash 258403303, now seen corresponding path program 5 times [2024-01-31 16:46:56,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:56,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255315642] [2024-01-31 16:46:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:56,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:46:57,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255315642] [2024-01-31 16:46:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255315642] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972727396] [2024-01-31 16:46:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:57,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:57,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:46:57,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:46:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:57,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:46:57,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:57,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:46:57,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-31 16:46:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:57,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:58,018 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:46:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:46:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:46:58,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972727396] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:58,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:58,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 29 [2024-01-31 16:46:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524850876] [2024-01-31 16:46:58,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:58,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:46:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:46:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:46:58,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:46:58,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 611 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 16:46:58,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:58,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:46:58,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:58,729 INFO L124 PetriNetUnfolderBase]: 198/376 cut-off events. [2024-01-31 16:46:58,730 INFO L125 PetriNetUnfolderBase]: For 1328/1328 co-relation queries the response was YES. [2024-01-31 16:46:58,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 376 events. 198/376 cut-off events. For 1328/1328 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1387 event pairs, 38 based on Foata normal form. 1/355 useless extension candidates. Maximal degree in co-relation 1753. Up to 272 conditions per place. [2024-01-31 16:46:58,732 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 50 selfloop transitions, 35 changer transitions 5/91 dead transitions. [2024-01-31 16:46:58,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 91 transitions, 888 flow [2024-01-31 16:46:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:46:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:46:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 119 transitions. [2024-01-31 16:46:58,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28743961352657005 [2024-01-31 16:46:58,734 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 611 flow. Second operand 18 states and 119 transitions. [2024-01-31 16:46:58,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 91 transitions, 888 flow [2024-01-31 16:46:58,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 779 flow, removed 25 selfloop flow, removed 15 redundant places. [2024-01-31 16:46:58,739 INFO L231 Difference]: Finished difference. Result has 95 places, 69 transitions, 592 flow [2024-01-31 16:46:58,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=592, PETRI_PLACES=95, PETRI_TRANSITIONS=69} [2024-01-31 16:46:58,741 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2024-01-31 16:46:58,741 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 69 transitions, 592 flow [2024-01-31 16:46:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 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 16:46:58,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:58,741 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:58,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 16:46:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 16:46:58,953 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:46:58,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2099588897, now seen corresponding path program 6 times [2024-01-31 16:46:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617274620] [2024-01-31 16:46:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:46:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617274620] [2024-01-31 16:46:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617274620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263434297] [2024-01-31 16:46:59,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:46:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:59,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:46:59,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:46:59,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:46:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:59,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:46:59,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:00,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:00,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:47:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:00,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:00,330 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:00,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-01-31 16:47:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263434297] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:00,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 27 [2024-01-31 16:47:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104419544] [2024-01-31 16:47:00,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:47:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:47:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:47:00,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 69 transitions, 592 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:47:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:00,983 INFO L124 PetriNetUnfolderBase]: 259/487 cut-off events. [2024-01-31 16:47:00,983 INFO L125 PetriNetUnfolderBase]: For 2152/2152 co-relation queries the response was YES. [2024-01-31 16:47:00,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 487 events. 259/487 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1977 event pairs, 32 based on Foata normal form. 1/446 useless extension candidates. Maximal degree in co-relation 2430. Up to 181 conditions per place. [2024-01-31 16:47:00,987 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 69 selfloop transitions, 43 changer transitions 4/117 dead transitions. [2024-01-31 16:47:00,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 117 transitions, 1191 flow [2024-01-31 16:47:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:47:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:47:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 124 transitions. [2024-01-31 16:47:00,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3171355498721228 [2024-01-31 16:47:00,989 INFO L175 Difference]: Start difference. First operand has 95 places, 69 transitions, 592 flow. Second operand 17 states and 124 transitions. [2024-01-31 16:47:00,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 117 transitions, 1191 flow [2024-01-31 16:47:00,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 117 transitions, 1092 flow, removed 7 selfloop flow, removed 18 redundant places. [2024-01-31 16:47:00,996 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 787 flow [2024-01-31 16:47:00,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=787, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2024-01-31 16:47:00,997 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 74 predicate places. [2024-01-31 16:47:00,997 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 787 flow [2024-01-31 16:47:00,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:47:00,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:00,999 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:01,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:47:01,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:01,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash -339272003, now seen corresponding path program 7 times [2024-01-31 16:47:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11103561] [2024-01-31 16:47:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:01,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:01,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11103561] [2024-01-31 16:47:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11103561] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:01,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378486943] [2024-01-31 16:47:01,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:01,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:01,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:47:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:01,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:47:01,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:01,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:01,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-31 16:47:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:01,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:02,221 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:47:02,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:47:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:02,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378486943] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:02,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:02,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-01-31 16:47:02,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694874696] [2024-01-31 16:47:02,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:02,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:47:02,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:47:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:47:02,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:02,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 787 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:02,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:02,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:02,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:02,653 INFO L124 PetriNetUnfolderBase]: 275/516 cut-off events. [2024-01-31 16:47:02,653 INFO L125 PetriNetUnfolderBase]: For 2870/2870 co-relation queries the response was YES. [2024-01-31 16:47:02,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2879 conditions, 516 events. 275/516 cut-off events. For 2870/2870 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2125 event pairs, 83 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 2793. Up to 407 conditions per place. [2024-01-31 16:47:02,656 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 79 selfloop transitions, 24 changer transitions 1/105 dead transitions. [2024-01-31 16:47:02,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 105 transitions, 1144 flow [2024-01-31 16:47:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2024-01-31 16:47:02,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33201581027667987 [2024-01-31 16:47:02,658 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 787 flow. Second operand 11 states and 84 transitions. [2024-01-31 16:47:02,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 105 transitions, 1144 flow [2024-01-31 16:47:02,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 105 transitions, 989 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-01-31 16:47:02,665 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 780 flow [2024-01-31 16:47:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=780, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2024-01-31 16:47:02,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 75 predicate places. [2024-01-31 16:47:02,666 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 780 flow [2024-01-31 16:47:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:02,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:02,666 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:02,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 16:47:02,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:47:02,877 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:02,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 618036669, now seen corresponding path program 8 times [2024-01-31 16:47:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918151218] [2024-01-31 16:47:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:03,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918151218] [2024-01-31 16:47:03,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918151218] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:03,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15503841] [2024-01-31 16:47:03,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:03,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:03,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:03,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:47:03,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:03,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:03,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:47:03,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:03,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:03,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:47:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:03,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:03,759 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:47:03,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:47:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15503841] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:03,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:03,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-01-31 16:47:03,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779228346] [2024-01-31 16:47:03,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:03,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:47:03,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:47:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:47:03,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:03,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 780 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:47:03,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:03,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:03,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:04,193 INFO L124 PetriNetUnfolderBase]: 284/536 cut-off events. [2024-01-31 16:47:04,193 INFO L125 PetriNetUnfolderBase]: For 2888/2888 co-relation queries the response was YES. [2024-01-31 16:47:04,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2735 conditions, 536 events. 284/536 cut-off events. For 2888/2888 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2247 event pairs, 79 based on Foata normal form. 1/519 useless extension candidates. Maximal degree in co-relation 2655. Up to 425 conditions per place. [2024-01-31 16:47:04,197 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 82 selfloop transitions, 28 changer transitions 4/115 dead transitions. [2024-01-31 16:47:04,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 1206 flow [2024-01-31 16:47:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 94 transitions. [2024-01-31 16:47:04,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31438127090301005 [2024-01-31 16:47:04,199 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 780 flow. Second operand 13 states and 94 transitions. [2024-01-31 16:47:04,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 1206 flow [2024-01-31 16:47:04,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 115 transitions, 1165 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-01-31 16:47:04,208 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 935 flow [2024-01-31 16:47:04,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=935, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2024-01-31 16:47:04,208 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2024-01-31 16:47:04,208 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 935 flow [2024-01-31 16:47:04,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:47:04,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:04,209 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:04,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:47:04,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1491777349, now seen corresponding path program 9 times [2024-01-31 16:47:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685965913] [2024-01-31 16:47:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685965913] [2024-01-31 16:47:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685965913] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902609604] [2024-01-31 16:47:05,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:05,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:05,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:05,126 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:47:05,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:05,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:05,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:47:05,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:05,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:05,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:47:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:05,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:05,628 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:47:05,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:47:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902609604] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:05,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 26 [2024-01-31 16:47:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888857118] [2024-01-31 16:47:05,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:05,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:47:05,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:47:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:47:05,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:05,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 935 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:47:05,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:05,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:05,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:06,254 INFO L124 PetriNetUnfolderBase]: 283/540 cut-off events. [2024-01-31 16:47:06,255 INFO L125 PetriNetUnfolderBase]: For 3194/3194 co-relation queries the response was YES. [2024-01-31 16:47:06,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 540 events. 283/540 cut-off events. For 3194/3194 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2305 event pairs, 81 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2751. Up to 416 conditions per place. [2024-01-31 16:47:06,259 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 76 selfloop transitions, 34 changer transitions 5/116 dead transitions. [2024-01-31 16:47:06,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 116 transitions, 1257 flow [2024-01-31 16:47:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:47:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:47:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 104 transitions. [2024-01-31 16:47:06,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30144927536231886 [2024-01-31 16:47:06,260 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 935 flow. Second operand 15 states and 104 transitions. [2024-01-31 16:47:06,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 116 transitions, 1257 flow [2024-01-31 16:47:06,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 116 transitions, 1151 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:06,270 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 924 flow [2024-01-31 16:47:06,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=924, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-01-31 16:47:06,270 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 90 predicate places. [2024-01-31 16:47:06,270 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 924 flow [2024-01-31 16:47:06,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:47:06,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:06,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:06,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:06,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:47:06,482 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:06,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash -742330145, now seen corresponding path program 10 times [2024-01-31 16:47:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202140416] [2024-01-31 16:47:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:06,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:06,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:06,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202140416] [2024-01-31 16:47:06,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202140416] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:06,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389779591] [2024-01-31 16:47:06,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:06,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:06,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:47:06,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:06,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:06,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:47:06,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:07,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:07,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-01-31 16:47:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:07,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:07,356 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:47:07,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:47:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389779591] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:07,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-01-31 16:47:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376534577] [2024-01-31 16:47:07,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:07,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:47:07,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:47:07,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:47:07,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:07,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 924 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:07,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:07,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:07,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:07,812 INFO L124 PetriNetUnfolderBase]: 283/538 cut-off events. [2024-01-31 16:47:07,812 INFO L125 PetriNetUnfolderBase]: For 2985/2985 co-relation queries the response was YES. [2024-01-31 16:47:07,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 538 events. 283/538 cut-off events. For 2985/2985 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2310 event pairs, 79 based on Foata normal form. 1/521 useless extension candidates. Maximal degree in co-relation 2704. Up to 415 conditions per place. [2024-01-31 16:47:07,816 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 89 selfloop transitions, 26 changer transitions 4/120 dead transitions. [2024-01-31 16:47:07,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 120 transitions, 1272 flow [2024-01-31 16:47:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2024-01-31 16:47:07,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32971014492753625 [2024-01-31 16:47:07,817 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 924 flow. Second operand 12 states and 91 transitions. [2024-01-31 16:47:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 120 transitions, 1272 flow [2024-01-31 16:47:07,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 120 transitions, 1192 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-01-31 16:47:07,826 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 949 flow [2024-01-31 16:47:07,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=949, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2024-01-31 16:47:07,827 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 90 predicate places. [2024-01-31 16:47:07,827 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 949 flow [2024-01-31 16:47:07,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:07,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:07,828 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:07,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:08,037 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash 813297526, now seen corresponding path program 11 times [2024-01-31 16:47:08,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:08,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876964627] [2024-01-31 16:47:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:08,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876964627] [2024-01-31 16:47:08,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876964627] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874769431] [2024-01-31 16:47:08,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:08,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:08,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:08,504 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:08,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:47:08,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:08,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:08,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:08,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:08,909 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:08,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874769431] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:08,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:47:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99152616] [2024-01-31 16:47:08,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:08,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:47:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:47:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:47:08,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:08,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 949 flow. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:08,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:08,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:08,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:09,349 INFO L124 PetriNetUnfolderBase]: 299/566 cut-off events. [2024-01-31 16:47:09,349 INFO L125 PetriNetUnfolderBase]: For 3526/3526 co-relation queries the response was YES. [2024-01-31 16:47:09,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3000 conditions, 566 events. 299/566 cut-off events. For 3526/3526 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2456 event pairs, 58 based on Foata normal form. 6/554 useless extension candidates. Maximal degree in co-relation 2917. Up to 292 conditions per place. [2024-01-31 16:47:09,354 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 91 selfloop transitions, 41 changer transitions 0/133 dead transitions. [2024-01-31 16:47:09,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 133 transitions, 1425 flow [2024-01-31 16:47:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:47:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:47:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 88 transitions. [2024-01-31 16:47:09,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3826086956521739 [2024-01-31 16:47:09,355 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 949 flow. Second operand 10 states and 88 transitions. [2024-01-31 16:47:09,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 133 transitions, 1425 flow [2024-01-31 16:47:09,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 133 transitions, 1350 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:09,395 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 1000 flow [2024-01-31 16:47:09,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1000, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2024-01-31 16:47:09,395 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 92 predicate places. [2024-01-31 16:47:09,396 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 1000 flow [2024-01-31 16:47:09,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:09,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:09,396 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:09,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:09,608 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:09,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash -508290375, now seen corresponding path program 12 times [2024-01-31 16:47:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:09,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765936901] [2024-01-31 16:47:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:10,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:10,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765936901] [2024-01-31 16:47:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765936901] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:10,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306500392] [2024-01-31 16:47:10,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:10,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:10,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:10,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:47:10,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:47:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:10,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:10,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:10,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:10,743 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:10,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:10,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306500392] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:10,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 22 [2024-01-31 16:47:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436625626] [2024-01-31 16:47:10,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:47:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:47:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:47:10,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 1000 flow. Second operand has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:11,131 INFO L124 PetriNetUnfolderBase]: 304/584 cut-off events. [2024-01-31 16:47:11,131 INFO L125 PetriNetUnfolderBase]: For 3338/3338 co-relation queries the response was YES. [2024-01-31 16:47:11,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 584 events. 304/584 cut-off events. For 3338/3338 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2647 event pairs, 55 based on Foata normal form. 4/570 useless extension candidates. Maximal degree in co-relation 2954. Up to 202 conditions per place. [2024-01-31 16:47:11,135 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 77 selfloop transitions, 51 changer transitions 18/147 dead transitions. [2024-01-31 16:47:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 147 transitions, 1574 flow [2024-01-31 16:47:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:47:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:47:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 106 transitions. [2024-01-31 16:47:11,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32919254658385094 [2024-01-31 16:47:11,136 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 1000 flow. Second operand 14 states and 106 transitions. [2024-01-31 16:47:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 147 transitions, 1574 flow [2024-01-31 16:47:11,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1450 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:11,147 INFO L231 Difference]: Finished difference. Result has 124 places, 103 transitions, 1033 flow [2024-01-31 16:47:11,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1033, PETRI_PLACES=124, PETRI_TRANSITIONS=103} [2024-01-31 16:47:11,147 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 101 predicate places. [2024-01-31 16:47:11,148 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 103 transitions, 1033 flow [2024-01-31 16:47:11,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.136363636363637) internal successors, (113), 22 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:11,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:11,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:11,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:11,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:11,359 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1607179207, now seen corresponding path program 13 times [2024-01-31 16:47:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:11,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743683782] [2024-01-31 16:47:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:11,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:11,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743683782] [2024-01-31 16:47:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743683782] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:11,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007036421] [2024-01-31 16:47:11,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:11,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:11,837 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:11,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:47:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:12,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:12,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:12,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:12,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-31 16:47:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:12,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:12,205 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:12,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007036421] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:12,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:12,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289241356] [2024-01-31 16:47:12,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:12,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:12,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:12,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 103 transitions, 1033 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 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 16:47:12,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:12,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:12,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:12,602 INFO L124 PetriNetUnfolderBase]: 307/589 cut-off events. [2024-01-31 16:47:12,603 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-01-31 16:47:12,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3159 conditions, 589 events. 307/589 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2605 event pairs, 80 based on Foata normal form. 4/569 useless extension candidates. Maximal degree in co-relation 3063. Up to 249 conditions per place. [2024-01-31 16:47:12,607 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 91 selfloop transitions, 41 changer transitions 1/134 dead transitions. [2024-01-31 16:47:12,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 134 transitions, 1482 flow [2024-01-31 16:47:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-01-31 16:47:12,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-01-31 16:47:12,608 INFO L175 Difference]: Start difference. First operand has 124 places, 103 transitions, 1033 flow. Second operand 9 states and 88 transitions. [2024-01-31 16:47:12,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 134 transitions, 1482 flow [2024-01-31 16:47:12,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 134 transitions, 1336 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-01-31 16:47:12,636 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 1003 flow [2024-01-31 16:47:12,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2024-01-31 16:47:12,636 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 97 predicate places. [2024-01-31 16:47:12,636 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 1003 flow [2024-01-31 16:47:12,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 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 16:47:12,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:12,637 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:12,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:12,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:12,849 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:12,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 883146762, now seen corresponding path program 14 times [2024-01-31 16:47:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563357013] [2024-01-31 16:47:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563357013] [2024-01-31 16:47:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563357013] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229472868] [2024-01-31 16:47:13,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:13,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:13,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:13,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:47:13,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:13,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:13,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:13,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:13,724 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:13,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229472868] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:13,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897582966] [2024-01-31 16:47:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:13,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:13,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 1003 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 16:47:13,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:13,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:13,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:14,058 INFO L124 PetriNetUnfolderBase]: 339/645 cut-off events. [2024-01-31 16:47:14,059 INFO L125 PetriNetUnfolderBase]: For 4102/4102 co-relation queries the response was YES. [2024-01-31 16:47:14,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3427 conditions, 645 events. 339/645 cut-off events. For 4102/4102 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2941 event pairs, 62 based on Foata normal form. 6/627 useless extension candidates. Maximal degree in co-relation 3342. Up to 302 conditions per place. [2024-01-31 16:47:14,063 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 98 selfloop transitions, 48 changer transitions 0/147 dead transitions. [2024-01-31 16:47:14,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1574 flow [2024-01-31 16:47:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 106 transitions. [2024-01-31 16:47:14,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38405797101449274 [2024-01-31 16:47:14,064 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 1003 flow. Second operand 12 states and 106 transitions. [2024-01-31 16:47:14,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1574 flow [2024-01-31 16:47:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 147 transitions, 1482 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:14,075 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 1091 flow [2024-01-31 16:47:14,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1091, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2024-01-31 16:47:14,075 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 104 predicate places. [2024-01-31 16:47:14,075 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 1091 flow [2024-01-31 16:47:14,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 16:47:14,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:14,076 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:14,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:14,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:14,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:14,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1702911717, now seen corresponding path program 15 times [2024-01-31 16:47:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:14,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213235791] [2024-01-31 16:47:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:14,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213235791] [2024-01-31 16:47:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213235791] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278600001] [2024-01-31 16:47:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:14,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:14,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:14,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:47:14,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:14,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:14,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:15,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:15,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:15,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:15,237 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:15,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278600001] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:15,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:47:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067278034] [2024-01-31 16:47:15,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:15,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:15,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 1091 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 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 16:47:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:15,671 INFO L124 PetriNetUnfolderBase]: 341/656 cut-off events. [2024-01-31 16:47:15,672 INFO L125 PetriNetUnfolderBase]: For 4389/4389 co-relation queries the response was YES. [2024-01-31 16:47:15,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 656 events. 341/656 cut-off events. For 4389/4389 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3064 event pairs, 90 based on Foata normal form. 4/636 useless extension candidates. Maximal degree in co-relation 3474. Up to 262 conditions per place. [2024-01-31 16:47:15,676 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 95 selfloop transitions, 41 changer transitions 7/144 dead transitions. [2024-01-31 16:47:15,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 144 transitions, 1552 flow [2024-01-31 16:47:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:47:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:47:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-01-31 16:47:15,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41739130434782606 [2024-01-31 16:47:15,677 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 1091 flow. Second operand 10 states and 96 transitions. [2024-01-31 16:47:15,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 144 transitions, 1552 flow [2024-01-31 16:47:15,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 144 transitions, 1469 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:15,687 INFO L231 Difference]: Finished difference. Result has 130 places, 109 transitions, 1096 flow [2024-01-31 16:47:15,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1096, PETRI_PLACES=130, PETRI_TRANSITIONS=109} [2024-01-31 16:47:15,688 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 107 predicate places. [2024-01-31 16:47:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 109 transitions, 1096 flow [2024-01-31 16:47:15,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 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 16:47:15,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:15,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:15,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 16:47:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:15,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:15,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1388311070, now seen corresponding path program 16 times [2024-01-31 16:47:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046041235] [2024-01-31 16:47:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046041235] [2024-01-31 16:47:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046041235] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121894380] [2024-01-31 16:47:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:16,284 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:16,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:47:16,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:16,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:16,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:16,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:16,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:16,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:16,666 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:16,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:16,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121894380] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:16,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:16,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-31 16:47:16,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019488126] [2024-01-31 16:47:16,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:16,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:16,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:16,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 109 transitions, 1096 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:16,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:16,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:16,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:17,303 INFO L124 PetriNetUnfolderBase]: 369/708 cut-off events. [2024-01-31 16:47:17,304 INFO L125 PetriNetUnfolderBase]: For 4796/4796 co-relation queries the response was YES. [2024-01-31 16:47:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 708 events. 369/708 cut-off events. For 4796/4796 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3353 event pairs, 52 based on Foata normal form. 6/690 useless extension candidates. Maximal degree in co-relation 3822. Up to 277 conditions per place. [2024-01-31 16:47:17,309 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 107 selfloop transitions, 55 changer transitions 3/166 dead transitions. [2024-01-31 16:47:17,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 166 transitions, 1783 flow [2024-01-31 16:47:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 16:47:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 16:47:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2024-01-31 16:47:17,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855072463768116 [2024-01-31 16:47:17,311 INFO L175 Difference]: Start difference. First operand has 130 places, 109 transitions, 1096 flow. Second operand 15 states and 133 transitions. [2024-01-31 16:47:17,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 166 transitions, 1783 flow [2024-01-31 16:47:17,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1701 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:17,322 INFO L231 Difference]: Finished difference. Result has 137 places, 114 transitions, 1207 flow [2024-01-31 16:47:17,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1207, PETRI_PLACES=137, PETRI_TRANSITIONS=114} [2024-01-31 16:47:17,323 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-01-31 16:47:17,323 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 114 transitions, 1207 flow [2024-01-31 16:47:17,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:17,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:17,323 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:17,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-31 16:47:17,535 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:17,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 244370699, now seen corresponding path program 17 times [2024-01-31 16:47:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868635696] [2024-01-31 16:47:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868635696] [2024-01-31 16:47:17,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868635696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:17,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953902519] [2024-01-31 16:47:17,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:17,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:17,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:17,949 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:17,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:47:18,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:18,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:18,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:18,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:18,352 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:18,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953902519] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:18,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-01-31 16:47:18,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569676593] [2024-01-31 16:47:18,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:18,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:47:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:18,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:47:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:47:18,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:18,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 114 transitions, 1207 flow. Second operand has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 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 16:47:18,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:18,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:18,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:18,653 INFO L124 PetriNetUnfolderBase]: 359/687 cut-off events. [2024-01-31 16:47:18,653 INFO L125 PetriNetUnfolderBase]: For 5332/5332 co-relation queries the response was YES. [2024-01-31 16:47:18,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 687 events. 359/687 cut-off events. For 5332/5332 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3232 event pairs, 98 based on Foata normal form. 4/671 useless extension candidates. Maximal degree in co-relation 3912. Up to 328 conditions per place. [2024-01-31 16:47:18,658 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 88 selfloop transitions, 40 changer transitions 10/139 dead transitions. [2024-01-31 16:47:18,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1613 flow [2024-01-31 16:47:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2024-01-31 16:47:18,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38164251207729466 [2024-01-31 16:47:18,659 INFO L175 Difference]: Start difference. First operand has 137 places, 114 transitions, 1207 flow. Second operand 9 states and 79 transitions. [2024-01-31 16:47:18,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1613 flow [2024-01-31 16:47:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 139 transitions, 1467 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-31 16:47:18,671 INFO L231 Difference]: Finished difference. Result has 135 places, 114 transitions, 1152 flow [2024-01-31 16:47:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1152, PETRI_PLACES=135, PETRI_TRANSITIONS=114} [2024-01-31 16:47:18,672 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 112 predicate places. [2024-01-31 16:47:18,672 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 114 transitions, 1152 flow [2024-01-31 16:47:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 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 16:47:18,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:18,672 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:18,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:18,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 16:47:18,883 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1912194196, now seen corresponding path program 18 times [2024-01-31 16:47:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746985526] [2024-01-31 16:47:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:19,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746985526] [2024-01-31 16:47:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746985526] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958550906] [2024-01-31 16:47:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:19,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:19,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:47:19,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:47:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:19,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:19,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:19,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:19,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:19,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:19,685 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:19,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:19,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958550906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:19,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:19,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:47:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858402614] [2024-01-31 16:47:19,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:19,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:19,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:19,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 114 transitions, 1152 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:19,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:19,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:19,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:20,054 INFO L124 PetriNetUnfolderBase]: 348/654 cut-off events. [2024-01-31 16:47:20,054 INFO L125 PetriNetUnfolderBase]: For 4598/4598 co-relation queries the response was YES. [2024-01-31 16:47:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3709 conditions, 654 events. 348/654 cut-off events. For 4598/4598 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2950 event pairs, 50 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 3617. Up to 257 conditions per place. [2024-01-31 16:47:20,059 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 91 selfloop transitions, 52 changer transitions 2/146 dead transitions. [2024-01-31 16:47:20,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 146 transitions, 1631 flow [2024-01-31 16:47:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 105 transitions. [2024-01-31 16:47:20,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511705685618729 [2024-01-31 16:47:20,060 INFO L175 Difference]: Start difference. First operand has 135 places, 114 transitions, 1152 flow. Second operand 13 states and 105 transitions. [2024-01-31 16:47:20,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 146 transitions, 1631 flow [2024-01-31 16:47:20,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 146 transitions, 1546 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:20,072 INFO L231 Difference]: Finished difference. Result has 136 places, 112 transitions, 1157 flow [2024-01-31 16:47:20,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1157, PETRI_PLACES=136, PETRI_TRANSITIONS=112} [2024-01-31 16:47:20,073 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 113 predicate places. [2024-01-31 16:47:20,073 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 112 transitions, 1157 flow [2024-01-31 16:47:20,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:20,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:20,073 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:20,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:20,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 16:47:20,285 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:20,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1346450949, now seen corresponding path program 19 times [2024-01-31 16:47:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276880737] [2024-01-31 16:47:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:20,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:20,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276880737] [2024-01-31 16:47:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276880737] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:20,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187605942] [2024-01-31 16:47:20,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:20,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:20,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:20,685 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:20,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:47:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:20,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:20,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:20,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:21,024 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:21,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:21,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187605942] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:21,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:21,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:21,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249357283] [2024-01-31 16:47:21,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:21,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:21,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:21,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 112 transitions, 1157 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 16:47:21,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:21,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:21,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:21,352 INFO L124 PetriNetUnfolderBase]: 343/647 cut-off events. [2024-01-31 16:47:21,352 INFO L125 PetriNetUnfolderBase]: For 5031/5031 co-relation queries the response was YES. [2024-01-31 16:47:21,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3739 conditions, 647 events. 343/647 cut-off events. For 5031/5031 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2941 event pairs, 127 based on Foata normal form. 4/631 useless extension candidates. Maximal degree in co-relation 3647. Up to 552 conditions per place. [2024-01-31 16:47:21,356 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 95 selfloop transitions, 23 changer transitions 10/129 dead transitions. [2024-01-31 16:47:21,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 129 transitions, 1497 flow [2024-01-31 16:47:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-01-31 16:47:21,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33816425120772947 [2024-01-31 16:47:21,358 INFO L175 Difference]: Start difference. First operand has 136 places, 112 transitions, 1157 flow. Second operand 9 states and 70 transitions. [2024-01-31 16:47:21,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 129 transitions, 1497 flow [2024-01-31 16:47:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 129 transitions, 1393 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-01-31 16:47:21,369 INFO L231 Difference]: Finished difference. Result has 133 places, 112 transitions, 1106 flow [2024-01-31 16:47:21,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=133, PETRI_TRANSITIONS=112} [2024-01-31 16:47:21,370 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2024-01-31 16:47:21,370 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 112 transitions, 1106 flow [2024-01-31 16:47:21,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 16:47:21,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:21,370 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:21,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 16:47:21,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:21,574 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:21,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1561320415, now seen corresponding path program 20 times [2024-01-31 16:47:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:21,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838458830] [2024-01-31 16:47:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:21,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838458830] [2024-01-31 16:47:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838458830] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984445851] [2024-01-31 16:47:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:21,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:21,995 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:22,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 16:47:22,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:22,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:22,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:22,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:22,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:47:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:22,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:22,465 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:22,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984445851] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:22,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492242908] [2024-01-31 16:47:22,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:22,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:22,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 112 transitions, 1106 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:22,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:22,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:22,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:22,781 INFO L124 PetriNetUnfolderBase]: 348/654 cut-off events. [2024-01-31 16:47:22,781 INFO L125 PetriNetUnfolderBase]: For 5231/5231 co-relation queries the response was YES. [2024-01-31 16:47:22,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3689 conditions, 654 events. 348/654 cut-off events. For 5231/5231 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2954 event pairs, 129 based on Foata normal form. 4/632 useless extension candidates. Maximal degree in co-relation 3596. Up to 539 conditions per place. [2024-01-31 16:47:22,785 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 101 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-01-31 16:47:22,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 130 transitions, 1457 flow [2024-01-31 16:47:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-31 16:47:22,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2024-01-31 16:47:22,787 INFO L175 Difference]: Start difference. First operand has 133 places, 112 transitions, 1106 flow. Second operand 9 states and 75 transitions. [2024-01-31 16:47:22,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 130 transitions, 1457 flow [2024-01-31 16:47:22,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 1405 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:22,797 INFO L231 Difference]: Finished difference. Result has 133 places, 113 transitions, 1140 flow [2024-01-31 16:47:22,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1140, PETRI_PLACES=133, PETRI_TRANSITIONS=113} [2024-01-31 16:47:22,798 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 110 predicate places. [2024-01-31 16:47:22,798 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 113 transitions, 1140 flow [2024-01-31 16:47:22,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:22,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:22,799 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:22,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 16:47:23,009 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1373195543, now seen corresponding path program 21 times [2024-01-31 16:47:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723837884] [2024-01-31 16:47:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723837884] [2024-01-31 16:47:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723837884] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115007516] [2024-01-31 16:47:23,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:23,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:23,386 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:23,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 16:47:23,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:47:23,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:23,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:23,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:23,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:23,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:23,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:23,756 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:23,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:23,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115007516] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:23,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:23,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:23,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102124576] [2024-01-31 16:47:23,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:23,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:23,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:23,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 113 transitions, 1140 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:23,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:23,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:24,059 INFO L124 PetriNetUnfolderBase]: 356/677 cut-off events. [2024-01-31 16:47:24,060 INFO L125 PetriNetUnfolderBase]: For 5711/5711 co-relation queries the response was YES. [2024-01-31 16:47:24,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 677 events. 356/677 cut-off events. For 5711/5711 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3105 event pairs, 128 based on Foata normal form. 4/653 useless extension candidates. Maximal degree in co-relation 3786. Up to 545 conditions per place. [2024-01-31 16:47:24,063 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 106 selfloop transitions, 28 changer transitions 6/141 dead transitions. [2024-01-31 16:47:24,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 141 transitions, 1593 flow [2024-01-31 16:47:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2024-01-31 16:47:24,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-31 16:47:24,064 INFO L175 Difference]: Start difference. First operand has 133 places, 113 transitions, 1140 flow. Second operand 12 states and 96 transitions. [2024-01-31 16:47:24,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 141 transitions, 1593 flow [2024-01-31 16:47:24,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 141 transitions, 1528 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:24,077 INFO L231 Difference]: Finished difference. Result has 140 places, 115 transitions, 1195 flow [2024-01-31 16:47:24,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1195, PETRI_PLACES=140, PETRI_TRANSITIONS=115} [2024-01-31 16:47:24,078 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 117 predicate places. [2024-01-31 16:47:24,078 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 115 transitions, 1195 flow [2024-01-31 16:47:24,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:24,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:24,079 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:24,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:24,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:24,295 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:24,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:24,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1957410820, now seen corresponding path program 22 times [2024-01-31 16:47:24,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646773485] [2024-01-31 16:47:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646773485] [2024-01-31 16:47:24,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646773485] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:24,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164637287] [2024-01-31 16:47:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:24,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:24,992 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:25,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 16:47:25,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:25,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:25,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:25,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:25,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:25,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:25,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:25,375 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:25,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:25,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164637287] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:25,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:25,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 23 [2024-01-31 16:47:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960842901] [2024-01-31 16:47:25,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:47:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:47:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:47:25,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:25,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 115 transitions, 1195 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:25,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:25,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:25,749 INFO L124 PetriNetUnfolderBase]: 359/681 cut-off events. [2024-01-31 16:47:25,749 INFO L125 PetriNetUnfolderBase]: For 6479/6479 co-relation queries the response was YES. [2024-01-31 16:47:25,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3960 conditions, 681 events. 359/681 cut-off events. For 6479/6479 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3112 event pairs, 138 based on Foata normal form. 6/687 useless extension candidates. Maximal degree in co-relation 3864. Up to 573 conditions per place. [2024-01-31 16:47:25,754 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 96 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-01-31 16:47:25,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 131 transitions, 1554 flow [2024-01-31 16:47:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-01-31 16:47:25,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3188405797101449 [2024-01-31 16:47:25,755 INFO L175 Difference]: Start difference. First operand has 140 places, 115 transitions, 1195 flow. Second operand 12 states and 88 transitions. [2024-01-31 16:47:25,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 131 transitions, 1554 flow [2024-01-31 16:47:25,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 1442 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:25,770 INFO L231 Difference]: Finished difference. Result has 141 places, 116 transitions, 1187 flow [2024-01-31 16:47:25,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1187, PETRI_PLACES=141, PETRI_TRANSITIONS=116} [2024-01-31 16:47:25,771 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-01-31 16:47:25,771 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 116 transitions, 1187 flow [2024-01-31 16:47:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:25,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:25,771 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:25,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-01-31 16:47:25,974 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:25,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash 358718724, now seen corresponding path program 23 times [2024-01-31 16:47:25,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:25,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942886795] [2024-01-31 16:47:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942886795] [2024-01-31 16:47:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942886795] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44520501] [2024-01-31 16:47:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:26,385 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 16:47:26,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:26,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:26,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:47:26,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:26,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:26,803 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:26,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44520501] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:26,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:26,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:47:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998529981] [2024-01-31 16:47:26,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:26,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:47:26,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:47:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:47:26,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:26,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 116 transitions, 1187 flow. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:47:26,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:26,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:26,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:27,171 INFO L124 PetriNetUnfolderBase]: 367/695 cut-off events. [2024-01-31 16:47:27,171 INFO L125 PetriNetUnfolderBase]: For 6490/6490 co-relation queries the response was YES. [2024-01-31 16:47:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 695 events. 367/695 cut-off events. For 6490/6490 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3201 event pairs, 139 based on Foata normal form. 6/701 useless extension candidates. Maximal degree in co-relation 3916. Up to 593 conditions per place. [2024-01-31 16:47:27,176 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 108 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-01-31 16:47:27,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 134 transitions, 1560 flow [2024-01-31 16:47:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-01-31 16:47:27,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-31 16:47:27,182 INFO L175 Difference]: Start difference. First operand has 141 places, 116 transitions, 1187 flow. Second operand 9 states and 72 transitions. [2024-01-31 16:47:27,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 134 transitions, 1560 flow [2024-01-31 16:47:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 134 transitions, 1476 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:27,198 INFO L231 Difference]: Finished difference. Result has 140 places, 117 transitions, 1185 flow [2024-01-31 16:47:27,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1185, PETRI_PLACES=140, PETRI_TRANSITIONS=117} [2024-01-31 16:47:27,199 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 117 predicate places. [2024-01-31 16:47:27,200 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 117 transitions, 1185 flow [2024-01-31 16:47:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:47:27,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:27,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:27,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:27,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:27,412 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:27,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 197965666, now seen corresponding path program 24 times [2024-01-31 16:47:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188990891] [2024-01-31 16:47:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:27,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:27,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:27,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188990891] [2024-01-31 16:47:27,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188990891] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:27,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058299609] [2024-01-31 16:47:27,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:27,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:27,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:27,872 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:27,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 16:47:28,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:47:28,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:28,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:28,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:28,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:28,272 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:28,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058299609] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:28,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:28,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474243563] [2024-01-31 16:47:28,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:28,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:28,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:28,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:28,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 117 transitions, 1185 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:28,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:28,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:28,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:28,546 INFO L124 PetriNetUnfolderBase]: 365/693 cut-off events. [2024-01-31 16:47:28,546 INFO L125 PetriNetUnfolderBase]: For 5923/5923 co-relation queries the response was YES. [2024-01-31 16:47:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 693 events. 365/693 cut-off events. For 5923/5923 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3192 event pairs, 147 based on Foata normal form. 2/695 useless extension candidates. Maximal degree in co-relation 3872. Up to 615 conditions per place. [2024-01-31 16:47:28,551 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 99 selfloop transitions, 21 changer transitions 4/125 dead transitions. [2024-01-31 16:47:28,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 125 transitions, 1454 flow [2024-01-31 16:47:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 64 transitions. [2024-01-31 16:47:28,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2024-01-31 16:47:28,552 INFO L175 Difference]: Start difference. First operand has 140 places, 117 transitions, 1185 flow. Second operand 9 states and 64 transitions. [2024-01-31 16:47:28,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 125 transitions, 1454 flow [2024-01-31 16:47:28,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 125 transitions, 1355 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-01-31 16:47:28,570 INFO L231 Difference]: Finished difference. Result has 137 places, 114 transitions, 1103 flow [2024-01-31 16:47:28,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=137, PETRI_TRANSITIONS=114} [2024-01-31 16:47:28,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-01-31 16:47:28,570 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 114 transitions, 1103 flow [2024-01-31 16:47:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:28,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:28,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:28,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:28,782 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1824393350, now seen corresponding path program 25 times [2024-01-31 16:47:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850115221] [2024-01-31 16:47:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:29,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850115221] [2024-01-31 16:47:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850115221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:29,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462734220] [2024-01-31 16:47:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:29,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:29,179 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:29,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 16:47:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:29,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:29,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:29,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:29,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:29,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:29,667 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:29,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:29,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462734220] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:29,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:29,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72824193] [2024-01-31 16:47:29,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:29,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:29,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:29,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:29,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 114 transitions, 1103 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:47:29,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:29,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:29,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:30,072 INFO L124 PetriNetUnfolderBase]: 359/674 cut-off events. [2024-01-31 16:47:30,073 INFO L125 PetriNetUnfolderBase]: For 5189/5189 co-relation queries the response was YES. [2024-01-31 16:47:30,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3751 conditions, 674 events. 359/674 cut-off events. For 5189/5189 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3055 event pairs, 142 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 3658. Up to 587 conditions per place. [2024-01-31 16:47:30,077 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 100 selfloop transitions, 24 changer transitions 2/127 dead transitions. [2024-01-31 16:47:30,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 127 transitions, 1403 flow [2024-01-31 16:47:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:47:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:47:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-01-31 16:47:30,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-01-31 16:47:30,078 INFO L175 Difference]: Start difference. First operand has 137 places, 114 transitions, 1103 flow. Second operand 10 states and 74 transitions. [2024-01-31 16:47:30,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 127 transitions, 1403 flow [2024-01-31 16:47:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 127 transitions, 1361 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:30,092 INFO L231 Difference]: Finished difference. Result has 136 places, 112 transitions, 1090 flow [2024-01-31 16:47:30,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1090, PETRI_PLACES=136, PETRI_TRANSITIONS=112} [2024-01-31 16:47:30,092 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 113 predicate places. [2024-01-31 16:47:30,092 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 112 transitions, 1090 flow [2024-01-31 16:47:30,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:47:30,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:30,093 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:30,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:30,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:30,297 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:30,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash -988335804, now seen corresponding path program 26 times [2024-01-31 16:47:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012579555] [2024-01-31 16:47:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:30,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012579555] [2024-01-31 16:47:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012579555] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138269049] [2024-01-31 16:47:30,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:30,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:30,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:30,874 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:30,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 16:47:31,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:31,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:31,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:31,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:31,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:31,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:31,287 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:31,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138269049] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:31,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 23 [2024-01-31 16:47:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430774839] [2024-01-31 16:47:31,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:31,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:47:31,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:47:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:47:31,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:31,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 112 transitions, 1090 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:47:31,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:31,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:31,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:31,829 INFO L124 PetriNetUnfolderBase]: 376/710 cut-off events. [2024-01-31 16:47:31,829 INFO L125 PetriNetUnfolderBase]: For 6449/6449 co-relation queries the response was YES. [2024-01-31 16:47:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 710 events. 376/710 cut-off events. For 6449/6449 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3278 event pairs, 132 based on Foata normal form. 6/716 useless extension candidates. Maximal degree in co-relation 3880. Up to 570 conditions per place. [2024-01-31 16:47:31,834 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 107 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-01-31 16:47:31,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 147 transitions, 1577 flow [2024-01-31 16:47:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:47:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:47:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 121 transitions. [2024-01-31 16:47:31,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.328804347826087 [2024-01-31 16:47:31,835 INFO L175 Difference]: Start difference. First operand has 136 places, 112 transitions, 1090 flow. Second operand 16 states and 121 transitions. [2024-01-31 16:47:31,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 147 transitions, 1577 flow [2024-01-31 16:47:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 147 transitions, 1527 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:31,851 INFO L231 Difference]: Finished difference. Result has 142 places, 115 transitions, 1177 flow [2024-01-31 16:47:31,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1177, PETRI_PLACES=142, PETRI_TRANSITIONS=115} [2024-01-31 16:47:31,851 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 119 predicate places. [2024-01-31 16:47:31,851 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 115 transitions, 1177 flow [2024-01-31 16:47:31,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:47:31,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:31,852 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:31,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:32,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-31 16:47:32,064 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:32,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:32,065 INFO L85 PathProgramCache]: Analyzing trace with hash -208346081, now seen corresponding path program 27 times [2024-01-31 16:47:32,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:32,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135811307] [2024-01-31 16:47:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:32,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135811307] [2024-01-31 16:47:32,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135811307] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156083168] [2024-01-31 16:47:32,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:32,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:32,485 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 16:47:32,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:32,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:32,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:32,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:32,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:47:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:32,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:32,975 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:32,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156083168] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:33,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:33,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662791724] [2024-01-31 16:47:33,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:33,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:33,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:33,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:33,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 115 transitions, 1177 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 16:47:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:33,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:33,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:33,382 INFO L124 PetriNetUnfolderBase]: 366/689 cut-off events. [2024-01-31 16:47:33,382 INFO L125 PetriNetUnfolderBase]: For 6229/6229 co-relation queries the response was YES. [2024-01-31 16:47:33,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 689 events. 366/689 cut-off events. For 6229/6229 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3145 event pairs, 137 based on Foata normal form. 4/693 useless extension candidates. Maximal degree in co-relation 3892. Up to 596 conditions per place. [2024-01-31 16:47:33,386 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 97 selfloop transitions, 26 changer transitions 4/128 dead transitions. [2024-01-31 16:47:33,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 128 transitions, 1473 flow [2024-01-31 16:47:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:47:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:47:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 75 transitions. [2024-01-31 16:47:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-31 16:47:33,405 INFO L175 Difference]: Start difference. First operand has 142 places, 115 transitions, 1177 flow. Second operand 10 states and 75 transitions. [2024-01-31 16:47:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 128 transitions, 1473 flow [2024-01-31 16:47:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 1371 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-01-31 16:47:33,421 INFO L231 Difference]: Finished difference. Result has 138 places, 113 transitions, 1108 flow [2024-01-31 16:47:33,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=138, PETRI_TRANSITIONS=113} [2024-01-31 16:47:33,422 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 115 predicate places. [2024-01-31 16:47:33,422 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 113 transitions, 1108 flow [2024-01-31 16:47:33,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 16:47:33,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:33,422 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:33,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-31 16:47:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-31 16:47:33,634 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:33,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1939873960, now seen corresponding path program 28 times [2024-01-31 16:47:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822100286] [2024-01-31 16:47:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822100286] [2024-01-31 16:47:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822100286] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303404667] [2024-01-31 16:47:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:33,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:33,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:33,996 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:34,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 16:47:34,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:34,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:34,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:34,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:34,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:34,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:34,430 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:34,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:34,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303404667] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:34,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:34,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133972075] [2024-01-31 16:47:34,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:34,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:34,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:34,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 113 transitions, 1108 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:34,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:34,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:34,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:34,811 INFO L124 PetriNetUnfolderBase]: 361/671 cut-off events. [2024-01-31 16:47:34,812 INFO L125 PetriNetUnfolderBase]: For 5563/5563 co-relation queries the response was YES. [2024-01-31 16:47:34,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3820 conditions, 671 events. 361/671 cut-off events. For 5563/5563 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3008 event pairs, 127 based on Foata normal form. 2/673 useless extension candidates. Maximal degree in co-relation 3726. Up to 550 conditions per place. [2024-01-31 16:47:34,815 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 100 selfloop transitions, 28 changer transitions 2/131 dead transitions. [2024-01-31 16:47:34,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 131 transitions, 1446 flow [2024-01-31 16:47:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2024-01-31 16:47:34,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32806324110671936 [2024-01-31 16:47:34,816 INFO L175 Difference]: Start difference. First operand has 138 places, 113 transitions, 1108 flow. Second operand 11 states and 83 transitions. [2024-01-31 16:47:34,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 131 transitions, 1446 flow [2024-01-31 16:47:34,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 131 transitions, 1388 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:34,830 INFO L231 Difference]: Finished difference. Result has 137 places, 111 transitions, 1087 flow [2024-01-31 16:47:34,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1087, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2024-01-31 16:47:34,831 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 114 predicate places. [2024-01-31 16:47:34,831 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 1087 flow [2024-01-31 16:47:34,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:34,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:34,831 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:34,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-01-31 16:47:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:35,045 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:35,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash -350473401, now seen corresponding path program 29 times [2024-01-31 16:47:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:35,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280944120] [2024-01-31 16:47:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:35,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:35,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280944120] [2024-01-31 16:47:35,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280944120] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:35,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796688100] [2024-01-31 16:47:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:35,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:35,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:35,393 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:35,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 16:47:35,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:35,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:35,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:35,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:35,841 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:35,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:35,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796688100] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:35,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:35,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:47:35,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418685572] [2024-01-31 16:47:35,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:35,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:47:35,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:47:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:47:35,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:35,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 1087 flow. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:35,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:35,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:35,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:36,075 INFO L124 PetriNetUnfolderBase]: 366/678 cut-off events. [2024-01-31 16:47:36,075 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2024-01-31 16:47:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 678 events. 366/678 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3015 event pairs, 139 based on Foata normal form. 4/682 useless extension candidates. Maximal degree in co-relation 3754. Up to 598 conditions per place. [2024-01-31 16:47:36,079 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 102 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-01-31 16:47:36,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1401 flow [2024-01-31 16:47:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-01-31 16:47:36,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3285024154589372 [2024-01-31 16:47:36,105 INFO L175 Difference]: Start difference. First operand has 137 places, 111 transitions, 1087 flow. Second operand 9 states and 68 transitions. [2024-01-31 16:47:36,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1401 flow [2024-01-31 16:47:36,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 125 transitions, 1343 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:36,119 INFO L231 Difference]: Finished difference. Result has 134 places, 112 transitions, 1086 flow [2024-01-31 16:47:36,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1086, PETRI_PLACES=134, PETRI_TRANSITIONS=112} [2024-01-31 16:47:36,119 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2024-01-31 16:47:36,120 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 112 transitions, 1086 flow [2024-01-31 16:47:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:47:36,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:36,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:36,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:36,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 16:47:36,332 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:36,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash -663369557, now seen corresponding path program 30 times [2024-01-31 16:47:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:36,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620515725] [2024-01-31 16:47:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:36,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:36,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620515725] [2024-01-31 16:47:36,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620515725] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:36,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598772313] [2024-01-31 16:47:36,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:36,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:36,728 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 16:47:36,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:47:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:36,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:36,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:37,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:37,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:47:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:37,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:37,192 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:37,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:37,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598772313] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:37,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:37,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:47:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950441370] [2024-01-31 16:47:37,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:47:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:47:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:47:37,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:37,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 112 transitions, 1086 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 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 16:47:37,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:37,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:37,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:37,476 INFO L124 PetriNetUnfolderBase]: 366/671 cut-off events. [2024-01-31 16:47:37,477 INFO L125 PetriNetUnfolderBase]: For 5145/5145 co-relation queries the response was YES. [2024-01-31 16:47:37,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3793 conditions, 671 events. 366/671 cut-off events. For 5145/5145 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2960 event pairs, 130 based on Foata normal form. 4/675 useless extension candidates. Maximal degree in co-relation 3700. Up to 575 conditions per place. [2024-01-31 16:47:37,482 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 101 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-01-31 16:47:37,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1415 flow [2024-01-31 16:47:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-01-31 16:47:37,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201581027667984 [2024-01-31 16:47:37,509 INFO L175 Difference]: Start difference. First operand has 134 places, 112 transitions, 1086 flow. Second operand 11 states and 81 transitions. [2024-01-31 16:47:37,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1415 flow [2024-01-31 16:47:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 129 transitions, 1362 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:37,524 INFO L231 Difference]: Finished difference. Result has 136 places, 113 transitions, 1102 flow [2024-01-31 16:47:37,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=136, PETRI_TRANSITIONS=113} [2024-01-31 16:47:37,525 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 113 predicate places. [2024-01-31 16:47:37,525 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 113 transitions, 1102 flow [2024-01-31 16:47:37,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 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 16:47:37,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:37,526 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:37,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:37,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 16:47:37,738 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:37,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:37,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1918639301, now seen corresponding path program 31 times [2024-01-31 16:47:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858015881] [2024-01-31 16:47:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:38,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:38,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858015881] [2024-01-31 16:47:38,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858015881] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:38,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182105085] [2024-01-31 16:47:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:38,285 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:38,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 16:47:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:38,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:38,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:38,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:38,679 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:38,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182105085] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:38,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:38,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 23 [2024-01-31 16:47:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177010714] [2024-01-31 16:47:38,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:38,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:47:38,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:47:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:47:38,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:38,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 113 transitions, 1102 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:47:38,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:38,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:38,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:39,076 INFO L124 PetriNetUnfolderBase]: 378/691 cut-off events. [2024-01-31 16:47:39,076 INFO L125 PetriNetUnfolderBase]: For 5416/5416 co-relation queries the response was YES. [2024-01-31 16:47:39,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3955 conditions, 691 events. 378/691 cut-off events. For 5416/5416 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3081 event pairs, 27 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 3862. Up to 283 conditions per place. [2024-01-31 16:47:39,096 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 91 selfloop transitions, 49 changer transitions 1/142 dead transitions. [2024-01-31 16:47:39,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 142 transitions, 1654 flow [2024-01-31 16:47:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:47:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:47:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 96 transitions. [2024-01-31 16:47:39,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3210702341137124 [2024-01-31 16:47:39,098 INFO L175 Difference]: Start difference. First operand has 136 places, 113 transitions, 1102 flow. Second operand 13 states and 96 transitions. [2024-01-31 16:47:39,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 142 transitions, 1654 flow [2024-01-31 16:47:39,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 142 transitions, 1600 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:39,126 INFO L231 Difference]: Finished difference. Result has 141 places, 115 transitions, 1197 flow [2024-01-31 16:47:39,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1197, PETRI_PLACES=141, PETRI_TRANSITIONS=115} [2024-01-31 16:47:39,128 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-01-31 16:47:39,128 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 115 transitions, 1197 flow [2024-01-31 16:47:39,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:47:39,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:39,128 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:39,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:47:39,340 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:39,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 969960062, now seen corresponding path program 32 times [2024-01-31 16:47:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924257799] [2024-01-31 16:47:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:39,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924257799] [2024-01-31 16:47:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924257799] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247992167] [2024-01-31 16:47:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:39,853 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 16:47:40,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:40,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:40,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:40,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:40,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:40,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:40,309 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:40,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247992167] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:40,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:40,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:47:40,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058344746] [2024-01-31 16:47:40,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:40,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:40,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:40,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 115 transitions, 1197 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:40,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:40,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:40,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:40,628 INFO L124 PetriNetUnfolderBase]: 388/716 cut-off events. [2024-01-31 16:47:40,628 INFO L125 PetriNetUnfolderBase]: For 7200/7200 co-relation queries the response was YES. [2024-01-31 16:47:40,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4290 conditions, 716 events. 388/716 cut-off events. For 7200/7200 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3240 event pairs, 71 based on Foata normal form. 6/722 useless extension candidates. Maximal degree in co-relation 4188. Up to 322 conditions per place. [2024-01-31 16:47:40,632 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 95 selfloop transitions, 46 changer transitions 1/143 dead transitions. [2024-01-31 16:47:40,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 143 transitions, 1718 flow [2024-01-31 16:47:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 84 transitions. [2024-01-31 16:47:40,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-01-31 16:47:40,633 INFO L175 Difference]: Start difference. First operand has 141 places, 115 transitions, 1197 flow. Second operand 9 states and 84 transitions. [2024-01-31 16:47:40,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 143 transitions, 1718 flow [2024-01-31 16:47:40,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 143 transitions, 1623 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:40,650 INFO L231 Difference]: Finished difference. Result has 141 places, 116 transitions, 1229 flow [2024-01-31 16:47:40,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=141, PETRI_TRANSITIONS=116} [2024-01-31 16:47:40,651 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 118 predicate places. [2024-01-31 16:47:40,651 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 116 transitions, 1229 flow [2024-01-31 16:47:40,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:40,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:40,654 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:40,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:40,865 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:40,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1007023925, now seen corresponding path program 33 times [2024-01-31 16:47:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891435953] [2024-01-31 16:47:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:41,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891435953] [2024-01-31 16:47:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891435953] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047369847] [2024-01-31 16:47:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:41,256 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:41,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 16:47:41,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:47:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:41,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:41,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:41,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:41,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:41,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:41,765 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:41,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047369847] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:41,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:47:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493878773] [2024-01-31 16:47:41,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:41,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 116 transitions, 1229 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:41,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:41,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:42,317 INFO L124 PetriNetUnfolderBase]: 428/794 cut-off events. [2024-01-31 16:47:42,317 INFO L125 PetriNetUnfolderBase]: For 7505/7505 co-relation queries the response was YES. [2024-01-31 16:47:42,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 794 events. 428/794 cut-off events. For 7505/7505 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3734 event pairs, 33 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 4724. Up to 309 conditions per place. [2024-01-31 16:47:42,322 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 111 selfloop transitions, 59 changer transitions 3/174 dead transitions. [2024-01-31 16:47:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 174 transitions, 2058 flow [2024-01-31 16:47:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:47:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:47:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-01-31 16:47:42,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641304347826087 [2024-01-31 16:47:42,326 INFO L175 Difference]: Start difference. First operand has 141 places, 116 transitions, 1229 flow. Second operand 16 states and 134 transitions. [2024-01-31 16:47:42,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 174 transitions, 2058 flow [2024-01-31 16:47:42,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 174 transitions, 1978 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:42,347 INFO L231 Difference]: Finished difference. Result has 155 places, 125 transitions, 1457 flow [2024-01-31 16:47:42,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1457, PETRI_PLACES=155, PETRI_TRANSITIONS=125} [2024-01-31 16:47:42,348 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 132 predicate places. [2024-01-31 16:47:42,348 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 125 transitions, 1457 flow [2024-01-31 16:47:42,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:42,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:42,348 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:42,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-31 16:47:42,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:42,559 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:42,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1219937922, now seen corresponding path program 34 times [2024-01-31 16:47:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:42,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426638031] [2024-01-31 16:47:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:42,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:43,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426638031] [2024-01-31 16:47:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426638031] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:43,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130572511] [2024-01-31 16:47:43,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:43,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:43,025 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:43,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 16:47:43,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:43,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:43,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:43,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:43,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:43,464 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:43,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130572511] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:43,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995400344] [2024-01-31 16:47:43,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:43,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:43,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 125 transitions, 1457 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:43,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:43,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:43,793 INFO L124 PetriNetUnfolderBase]: 429/804 cut-off events. [2024-01-31 16:47:43,793 INFO L125 PetriNetUnfolderBase]: For 8659/8659 co-relation queries the response was YES. [2024-01-31 16:47:43,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5110 conditions, 804 events. 429/804 cut-off events. For 8659/8659 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3849 event pairs, 93 based on Foata normal form. 2/806 useless extension candidates. Maximal degree in co-relation 5008. Up to 398 conditions per place. [2024-01-31 16:47:43,798 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 93 selfloop transitions, 45 changer transitions 8/147 dead transitions. [2024-01-31 16:47:43,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 147 transitions, 1946 flow [2024-01-31 16:47:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-31 16:47:43,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2024-01-31 16:47:43,799 INFO L175 Difference]: Start difference. First operand has 155 places, 125 transitions, 1457 flow. Second operand 9 states and 75 transitions. [2024-01-31 16:47:43,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 147 transitions, 1946 flow [2024-01-31 16:47:43,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 147 transitions, 1752 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-01-31 16:47:43,821 INFO L231 Difference]: Finished difference. Result has 156 places, 124 transitions, 1368 flow [2024-01-31 16:47:43,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1368, PETRI_PLACES=156, PETRI_TRANSITIONS=124} [2024-01-31 16:47:43,822 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 133 predicate places. [2024-01-31 16:47:43,822 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 124 transitions, 1368 flow [2024-01-31 16:47:43,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:43,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:43,823 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:43,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-31 16:47:44,034 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:44,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1942004905, now seen corresponding path program 35 times [2024-01-31 16:47:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331366191] [2024-01-31 16:47:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:44,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:44,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331366191] [2024-01-31 16:47:44,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331366191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:44,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921496177] [2024-01-31 16:47:44,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:44,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:44,399 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:44,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 16:47:44,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:44,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:44,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:44,789 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:47:44,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:47:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:44,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:44,895 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:44,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:44,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921496177] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:44,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:44,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517796627] [2024-01-31 16:47:44,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:44,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:44,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:44,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 124 transitions, 1368 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:44,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:44,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:44,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:45,235 INFO L124 PetriNetUnfolderBase]: 432/802 cut-off events. [2024-01-31 16:47:45,235 INFO L125 PetriNetUnfolderBase]: For 8405/8405 co-relation queries the response was YES. [2024-01-31 16:47:45,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4956 conditions, 802 events. 432/802 cut-off events. For 8405/8405 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3778 event pairs, 159 based on Foata normal form. 4/806 useless extension candidates. Maximal degree in co-relation 4854. Up to 683 conditions per place. [2024-01-31 16:47:45,240 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 114 selfloop transitions, 24 changer transitions 0/139 dead transitions. [2024-01-31 16:47:45,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 139 transitions, 1778 flow [2024-01-31 16:47:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-01-31 16:47:45,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-01-31 16:47:45,241 INFO L175 Difference]: Start difference. First operand has 156 places, 124 transitions, 1368 flow. Second operand 9 states and 69 transitions. [2024-01-31 16:47:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 139 transitions, 1778 flow [2024-01-31 16:47:45,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 139 transitions, 1686 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-01-31 16:47:45,261 INFO L231 Difference]: Finished difference. Result has 156 places, 125 transitions, 1359 flow [2024-01-31 16:47:45,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1359, PETRI_PLACES=156, PETRI_TRANSITIONS=125} [2024-01-31 16:47:45,262 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 133 predicate places. [2024-01-31 16:47:45,262 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 125 transitions, 1359 flow [2024-01-31 16:47:45,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 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 16:47:45,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:45,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:45,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:45,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-31 16:47:45,474 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:45,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 719779027, now seen corresponding path program 36 times [2024-01-31 16:47:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:45,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566467073] [2024-01-31 16:47:45,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:45,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566467073] [2024-01-31 16:47:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566467073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940603660] [2024-01-31 16:47:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:45,856 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 16:47:46,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:47:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:46,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:47:46,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:46,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:46,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:47:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:46,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:46,281 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:46,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940603660] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:46,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781660660] [2024-01-31 16:47:46,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:46,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:46,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 125 transitions, 1359 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 16:47:46,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:46,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:46,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:46,631 INFO L124 PetriNetUnfolderBase]: 440/825 cut-off events. [2024-01-31 16:47:46,631 INFO L125 PetriNetUnfolderBase]: For 8892/8892 co-relation queries the response was YES. [2024-01-31 16:47:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 825 events. 440/825 cut-off events. For 8892/8892 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3961 event pairs, 145 based on Foata normal form. 8/833 useless extension candidates. Maximal degree in co-relation 4956. Up to 651 conditions per place. [2024-01-31 16:47:46,636 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 117 selfloop transitions, 30 changer transitions 6/154 dead transitions. [2024-01-31 16:47:46,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 154 transitions, 1921 flow [2024-01-31 16:47:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 96 transitions. [2024-01-31 16:47:46,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-31 16:47:46,637 INFO L175 Difference]: Start difference. First operand has 156 places, 125 transitions, 1359 flow. Second operand 12 states and 96 transitions. [2024-01-31 16:47:46,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 154 transitions, 1921 flow [2024-01-31 16:47:46,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 154 transitions, 1826 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:46,659 INFO L231 Difference]: Finished difference. Result has 160 places, 127 transitions, 1409 flow [2024-01-31 16:47:46,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1409, PETRI_PLACES=160, PETRI_TRANSITIONS=127} [2024-01-31 16:47:46,659 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2024-01-31 16:47:46,659 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 127 transitions, 1409 flow [2024-01-31 16:47:46,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 16:47:46,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:46,660 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:46,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:46,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 16:47:46,872 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:46,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1615537325, now seen corresponding path program 37 times [2024-01-31 16:47:46,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:46,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245434408] [2024-01-31 16:47:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:46,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:47:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245434408] [2024-01-31 16:47:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245434408] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339847282] [2024-01-31 16:47:47,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:47,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:47,567 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:47,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 16:47:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:47,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:47:47,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:47,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:47,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-31 16:47:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:47,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:48,038 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:48,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339847282] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:48,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-01-31 16:47:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997184014] [2024-01-31 16:47:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:47:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:47:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:47:48,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:48,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 127 transitions, 1409 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:47:48,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:48,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:48,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:48,564 INFO L124 PetriNetUnfolderBase]: 429/800 cut-off events. [2024-01-31 16:47:48,564 INFO L125 PetriNetUnfolderBase]: For 8473/8473 co-relation queries the response was YES. [2024-01-31 16:47:48,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 800 events. 429/800 cut-off events. For 8473/8473 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3784 event pairs, 148 based on Foata normal form. 4/804 useless extension candidates. Maximal degree in co-relation 4750. Up to 636 conditions per place. [2024-01-31 16:47:48,568 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 110 selfloop transitions, 36 changer transitions 2/149 dead transitions. [2024-01-31 16:47:48,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 149 transitions, 1866 flow [2024-01-31 16:47:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:47:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:47:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-01-31 16:47:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-01-31 16:47:48,569 INFO L175 Difference]: Start difference. First operand has 160 places, 127 transitions, 1409 flow. Second operand 14 states and 104 transitions. [2024-01-31 16:47:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 149 transitions, 1866 flow [2024-01-31 16:47:48,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 149 transitions, 1744 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:48,590 INFO L231 Difference]: Finished difference. Result has 164 places, 128 transitions, 1405 flow [2024-01-31 16:47:48,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1405, PETRI_PLACES=164, PETRI_TRANSITIONS=128} [2024-01-31 16:47:48,591 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2024-01-31 16:47:48,591 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 128 transitions, 1405 flow [2024-01-31 16:47:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:47:48,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:48,591 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:48,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:48,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 16:47:48,803 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:48,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash 161283064, now seen corresponding path program 38 times [2024-01-31 16:47:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098011681] [2024-01-31 16:47:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:48,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:47:49,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098011681] [2024-01-31 16:47:49,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098011681] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:49,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474052400] [2024-01-31 16:47:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:49,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:49,390 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:49,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 16:47:49,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:49,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:49,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:49,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:49,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:49,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:49,855 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:49,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474052400] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:49,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 23 [2024-01-31 16:47:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984286099] [2024-01-31 16:47:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:47:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:47:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:47:49,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:49,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 128 transitions, 1405 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:47:49,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:49,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:49,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:50,362 INFO L124 PetriNetUnfolderBase]: 439/825 cut-off events. [2024-01-31 16:47:50,362 INFO L125 PetriNetUnfolderBase]: For 8318/8318 co-relation queries the response was YES. [2024-01-31 16:47:50,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 825 events. 439/825 cut-off events. For 8318/8318 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3981 event pairs, 159 based on Foata normal form. 6/831 useless extension candidates. Maximal degree in co-relation 4813. Up to 689 conditions per place. [2024-01-31 16:47:50,367 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 109 selfloop transitions, 34 changer transitions 1/145 dead transitions. [2024-01-31 16:47:50,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 145 transitions, 1836 flow [2024-01-31 16:47:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-01-31 16:47:50,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3188405797101449 [2024-01-31 16:47:50,368 INFO L175 Difference]: Start difference. First operand has 164 places, 128 transitions, 1405 flow. Second operand 12 states and 88 transitions. [2024-01-31 16:47:50,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 145 transitions, 1836 flow [2024-01-31 16:47:50,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 145 transitions, 1745 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-31 16:47:50,390 INFO L231 Difference]: Finished difference. Result has 164 places, 129 transitions, 1420 flow [2024-01-31 16:47:50,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1420, PETRI_PLACES=164, PETRI_TRANSITIONS=129} [2024-01-31 16:47:50,391 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 141 predicate places. [2024-01-31 16:47:50,391 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 129 transitions, 1420 flow [2024-01-31 16:47:50,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:47:50,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:50,392 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:50,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-31 16:47:50,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:50,603 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:50,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash 309223316, now seen corresponding path program 39 times [2024-01-31 16:47:50,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:50,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229749750] [2024-01-31 16:47:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:50,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:47:51,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:51,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229749750] [2024-01-31 16:47:51,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229749750] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:51,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714059568] [2024-01-31 16:47:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:47:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:51,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:51,347 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:51,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 16:47:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:47:51,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:51,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:51,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:51,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:51,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:47:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:51,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:51,863 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:51,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:51,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714059568] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:51,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 7] total 26 [2024-01-31 16:47:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6565019] [2024-01-31 16:47:51,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:47:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:47:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:47:51,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:51,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 129 transitions, 1420 flow. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 16:47:51,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:51,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:51,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:52,695 INFO L124 PetriNetUnfolderBase]: 443/845 cut-off events. [2024-01-31 16:47:52,695 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2024-01-31 16:47:52,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 845 events. 443/845 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4093 event pairs, 97 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 4824. Up to 435 conditions per place. [2024-01-31 16:47:52,702 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 92 selfloop transitions, 71 changer transitions 8/172 dead transitions. [2024-01-31 16:47:52,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 172 transitions, 2046 flow [2024-01-31 16:47:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:47:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:47:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 153 transitions. [2024-01-31 16:47:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2892249527410208 [2024-01-31 16:47:52,710 INFO L175 Difference]: Start difference. First operand has 164 places, 129 transitions, 1420 flow. Second operand 23 states and 153 transitions. [2024-01-31 16:47:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 172 transitions, 2046 flow [2024-01-31 16:47:52,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 172 transitions, 1946 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-01-31 16:47:52,735 INFO L231 Difference]: Finished difference. Result has 178 places, 140 transitions, 1565 flow [2024-01-31 16:47:52,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1565, PETRI_PLACES=178, PETRI_TRANSITIONS=140} [2024-01-31 16:47:52,736 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 155 predicate places. [2024-01-31 16:47:52,736 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 140 transitions, 1565 flow [2024-01-31 16:47:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 0 states have call successors, (0), 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 16:47:52,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:52,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:47:52,948 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:52,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:52,949 INFO L85 PathProgramCache]: Analyzing trace with hash -482381071, now seen corresponding path program 40 times [2024-01-31 16:47:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357136816] [2024-01-31 16:47:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:53,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357136816] [2024-01-31 16:47:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357136816] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914696625] [2024-01-31 16:47:53,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:47:53,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:53,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:53,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:53,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 16:47:53,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:47:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:53,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:53,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:53,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:53,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:53,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:53,793 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:53,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:53,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914696625] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:53,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:53,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:47:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084447837] [2024-01-31 16:47:53,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:53,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:53,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:53,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 140 transitions, 1565 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:53,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:53,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:53,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:54,161 INFO L124 PetriNetUnfolderBase]: 423/807 cut-off events. [2024-01-31 16:47:54,161 INFO L125 PetriNetUnfolderBase]: For 6920/6920 co-relation queries the response was YES. [2024-01-31 16:47:54,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4889 conditions, 807 events. 423/807 cut-off events. For 6920/6920 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3833 event pairs, 29 based on Foata normal form. 8/815 useless extension candidates. Maximal degree in co-relation 4796. Up to 292 conditions per place. [2024-01-31 16:47:54,167 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 108 selfloop transitions, 59 changer transitions 6/174 dead transitions. [2024-01-31 16:47:54,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 174 transitions, 2111 flow [2024-01-31 16:47:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:47:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:47:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 113 transitions. [2024-01-31 16:47:54,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35093167701863354 [2024-01-31 16:47:54,168 INFO L175 Difference]: Start difference. First operand has 178 places, 140 transitions, 1565 flow. Second operand 14 states and 113 transitions. [2024-01-31 16:47:54,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 174 transitions, 2111 flow [2024-01-31 16:47:54,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 174 transitions, 1943 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-01-31 16:47:54,190 INFO L231 Difference]: Finished difference. Result has 177 places, 137 transitions, 1488 flow [2024-01-31 16:47:54,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1488, PETRI_PLACES=177, PETRI_TRANSITIONS=137} [2024-01-31 16:47:54,191 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 154 predicate places. [2024-01-31 16:47:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 137 transitions, 1488 flow [2024-01-31 16:47:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:54,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:54,192 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:54,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-01-31 16:47:54,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 16:47:54,403 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:54,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1031176711, now seen corresponding path program 41 times [2024-01-31 16:47:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:54,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060677707] [2024-01-31 16:47:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:54,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060677707] [2024-01-31 16:47:54,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060677707] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076691641] [2024-01-31 16:47:54,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:47:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:54,788 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:54,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-31 16:47:55,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:47:55,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:55,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:47:55,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:55,237 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:47:55,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:47:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:55,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:55,350 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-01-31 16:47:55,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-01-31 16:47:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:55,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076691641] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:55,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:55,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-01-31 16:47:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299514126] [2024-01-31 16:47:55,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:55,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 16:47:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 16:47:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-31 16:47:55,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:55,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 137 transitions, 1488 flow. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:47:55,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:55,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:55,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:55,726 INFO L124 PetriNetUnfolderBase]: 439/819 cut-off events. [2024-01-31 16:47:55,726 INFO L125 PetriNetUnfolderBase]: For 7140/7140 co-relation queries the response was YES. [2024-01-31 16:47:55,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5026 conditions, 819 events. 439/819 cut-off events. For 7140/7140 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3828 event pairs, 31 based on Foata normal form. 4/823 useless extension candidates. Maximal degree in co-relation 4941. Up to 328 conditions per place. [2024-01-31 16:47:55,731 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 109 selfloop transitions, 58 changer transitions 1/169 dead transitions. [2024-01-31 16:47:55,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 169 transitions, 2076 flow [2024-01-31 16:47:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:47:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:47:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-01-31 16:47:55,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-01-31 16:47:55,732 INFO L175 Difference]: Start difference. First operand has 177 places, 137 transitions, 1488 flow. Second operand 12 states and 95 transitions. [2024-01-31 16:47:55,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 169 transitions, 2076 flow [2024-01-31 16:47:55,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 169 transitions, 1935 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-01-31 16:47:55,755 INFO L231 Difference]: Finished difference. Result has 173 places, 141 transitions, 1538 flow [2024-01-31 16:47:55,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1538, PETRI_PLACES=173, PETRI_TRANSITIONS=141} [2024-01-31 16:47:55,756 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 150 predicate places. [2024-01-31 16:47:55,756 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 141 transitions, 1538 flow [2024-01-31 16:47:55,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:47:55,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:55,756 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:55,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-31 16:47:55,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 16:47:55,960 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1755167724, now seen corresponding path program 42 times [2024-01-31 16:47:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142043713] [2024-01-31 16:47:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142043713] [2024-01-31 16:47:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142043713] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959497465] [2024-01-31 16:47:56,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:47:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:56,355 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:56,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-31 16:47:56,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:47:56,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:56,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:56,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:56,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:56,829 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-01-31 16:47:56,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-01-31 16:47:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:56,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959497465] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:56,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:56,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-01-31 16:47:56,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697785757] [2024-01-31 16:47:56,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:56,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:47:56,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:56,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:47:56,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:47:56,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:56,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 141 transitions, 1538 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:56,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:56,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:56,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:57,176 INFO L124 PetriNetUnfolderBase]: 435/806 cut-off events. [2024-01-31 16:47:57,177 INFO L125 PetriNetUnfolderBase]: For 7319/7319 co-relation queries the response was YES. [2024-01-31 16:47:57,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4978 conditions, 806 events. 435/806 cut-off events. For 7319/7319 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3747 event pairs, 89 based on Foata normal form. 2/808 useless extension candidates. Maximal degree in co-relation 4892. Up to 435 conditions per place. [2024-01-31 16:47:57,181 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 106 selfloop transitions, 48 changer transitions 6/161 dead transitions. [2024-01-31 16:47:57,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 161 transitions, 1996 flow [2024-01-31 16:47:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:47:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:47:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 73 transitions. [2024-01-31 16:47:57,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526570048309179 [2024-01-31 16:47:57,182 INFO L175 Difference]: Start difference. First operand has 173 places, 141 transitions, 1538 flow. Second operand 9 states and 73 transitions. [2024-01-31 16:47:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 161 transitions, 1996 flow [2024-01-31 16:47:57,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 161 transitions, 1880 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:47:57,203 INFO L231 Difference]: Finished difference. Result has 172 places, 138 transitions, 1481 flow [2024-01-31 16:47:57,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1481, PETRI_PLACES=172, PETRI_TRANSITIONS=138} [2024-01-31 16:47:57,204 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-01-31 16:47:57,204 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 138 transitions, 1481 flow [2024-01-31 16:47:57,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 16:47:57,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:57,204 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:57,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-01-31 16:47:57,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:57,415 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:57,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:57,416 INFO L85 PathProgramCache]: Analyzing trace with hash 81131104, now seen corresponding path program 43 times [2024-01-31 16:47:57,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:57,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021465404] [2024-01-31 16:47:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021465404] [2024-01-31 16:47:57,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021465404] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:57,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354539476] [2024-01-31 16:47:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:47:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:57,764 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:57,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-31 16:47:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:58,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:47:58,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:58,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:47:58,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-01-31 16:47:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:58,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:58,209 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:58,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:47:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354539476] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:58,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:58,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-01-31 16:47:58,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22324133] [2024-01-31 16:47:58,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:58,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:58,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 138 transitions, 1481 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:58,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:58,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:58,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:58,697 INFO L124 PetriNetUnfolderBase]: 443/825 cut-off events. [2024-01-31 16:47:58,697 INFO L125 PetriNetUnfolderBase]: For 8475/8475 co-relation queries the response was YES. [2024-01-31 16:47:58,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5108 conditions, 825 events. 443/825 cut-off events. For 8475/8475 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3864 event pairs, 134 based on Foata normal form. 6/831 useless extension candidates. Maximal degree in co-relation 5022. Up to 632 conditions per place. [2024-01-31 16:47:58,702 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 148 selfloop transitions, 33 changer transitions 6/188 dead transitions. [2024-01-31 16:47:58,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 188 transitions, 2224 flow [2024-01-31 16:47:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:47:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:47:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 124 transitions. [2024-01-31 16:47:58,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38509316770186336 [2024-01-31 16:47:58,703 INFO L175 Difference]: Start difference. First operand has 172 places, 138 transitions, 1481 flow. Second operand 14 states and 124 transitions. [2024-01-31 16:47:58,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 188 transitions, 2224 flow [2024-01-31 16:47:58,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 188 transitions, 2125 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-01-31 16:47:58,724 INFO L231 Difference]: Finished difference. Result has 177 places, 142 transitions, 1553 flow [2024-01-31 16:47:58,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1553, PETRI_PLACES=177, PETRI_TRANSITIONS=142} [2024-01-31 16:47:58,725 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 154 predicate places. [2024-01-31 16:47:58,725 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 142 transitions, 1553 flow [2024-01-31 16:47:58,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:47:58,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:58,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:58,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-01-31 16:47:58,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:58,952 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:47:58,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash 886846198, now seen corresponding path program 44 times [2024-01-31 16:47:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391537573] [2024-01-31 16:47:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:59,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391537573] [2024-01-31 16:47:59,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391537573] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:47:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214823045] [2024-01-31 16:47:59,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:47:59,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:47:59,380 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:47:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-31 16:47:59,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:47:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:47:59,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:47:59,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:47:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:59,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:47:59,819 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:47:59,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:47:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:47:59,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214823045] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:47:59,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:47:59,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:47:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188235267] [2024-01-31 16:47:59,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:47:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:47:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:47:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:47:59,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:47:59,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 142 transitions, 1553 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 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 16:47:59,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:59,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:47:59,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:00,181 INFO L124 PetriNetUnfolderBase]: 440/820 cut-off events. [2024-01-31 16:48:00,182 INFO L125 PetriNetUnfolderBase]: For 7966/7966 co-relation queries the response was YES. [2024-01-31 16:48:00,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 820 events. 440/820 cut-off events. For 7966/7966 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3843 event pairs, 156 based on Foata normal form. 2/822 useless extension candidates. Maximal degree in co-relation 4998. Up to 706 conditions per place. [2024-01-31 16:48:00,188 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 121 selfloop transitions, 24 changer transitions 5/151 dead transitions. [2024-01-31 16:48:00,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 151 transitions, 1922 flow [2024-01-31 16:48:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:48:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:48:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 64 transitions. [2024-01-31 16:48:00,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2024-01-31 16:48:00,190 INFO L175 Difference]: Start difference. First operand has 177 places, 142 transitions, 1553 flow. Second operand 9 states and 64 transitions. [2024-01-31 16:48:00,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 151 transitions, 1922 flow [2024-01-31 16:48:00,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 151 transitions, 1772 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-01-31 16:48:00,216 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1422 flow [2024-01-31 16:48:00,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-01-31 16:48:00,216 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 151 predicate places. [2024-01-31 16:48:00,216 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1422 flow [2024-01-31 16:48:00,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 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 16:48:00,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:00,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:00,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:00,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:00,430 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:00,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2091963794, now seen corresponding path program 45 times [2024-01-31 16:48:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424633075] [2024-01-31 16:48:00,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:00,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424633075] [2024-01-31 16:48:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424633075] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237309539] [2024-01-31 16:48:00,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:00,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:00,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:00,964 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:00,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-31 16:48:01,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:01,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:01,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:48:01,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:01,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:01,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:48:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:01,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:01,454 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:01,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:48:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237309539] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:01,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:48:01,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81037900] [2024-01-31 16:48:01,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:48:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:48:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:48:01,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:01,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1422 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 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 16:48:01,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:01,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:01,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:01,933 INFO L124 PetriNetUnfolderBase]: 434/801 cut-off events. [2024-01-31 16:48:01,934 INFO L125 PetriNetUnfolderBase]: For 5886/5886 co-relation queries the response was YES. [2024-01-31 16:48:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4746 conditions, 801 events. 434/801 cut-off events. For 5886/5886 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3705 event pairs, 150 based on Foata normal form. 2/803 useless extension candidates. Maximal degree in co-relation 4659. Up to 678 conditions per place. [2024-01-31 16:48:01,938 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 122 selfloop transitions, 27 changer transitions 3/153 dead transitions. [2024-01-31 16:48:01,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 1828 flow [2024-01-31 16:48:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:48:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:48:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-01-31 16:48:01,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-01-31 16:48:01,939 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1422 flow. Second operand 10 states and 74 transitions. [2024-01-31 16:48:01,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 1828 flow [2024-01-31 16:48:01,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 153 transitions, 1780 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:48:01,956 INFO L231 Difference]: Finished difference. Result has 173 places, 137 transitions, 1409 flow [2024-01-31 16:48:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1409, PETRI_PLACES=173, PETRI_TRANSITIONS=137} [2024-01-31 16:48:01,957 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 150 predicate places. [2024-01-31 16:48:01,958 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 137 transitions, 1409 flow [2024-01-31 16:48:01,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 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 16:48:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:01,958 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:01,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:02,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-01-31 16:48:02,171 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:02,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash -846118124, now seen corresponding path program 46 times [2024-01-31 16:48:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:02,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892466521] [2024-01-31 16:48:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892466521] [2024-01-31 16:48:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892466521] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344480196] [2024-01-31 16:48:02,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:02,549 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:02,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-31 16:48:02,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:02,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:02,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:02,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:02,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-31 16:48:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:02,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:02,979 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:02,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:48:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344480196] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:03,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-01-31 16:48:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711469019] [2024-01-31 16:48:03,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:03,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:48:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:48:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:48:03,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:03,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 137 transitions, 1409 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:48:03,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:03,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:03,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:03,407 INFO L124 PetriNetUnfolderBase]: 427/783 cut-off events. [2024-01-31 16:48:03,408 INFO L125 PetriNetUnfolderBase]: For 5716/5716 co-relation queries the response was YES. [2024-01-31 16:48:03,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 783 events. 427/783 cut-off events. For 5716/5716 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3571 event pairs, 128 based on Foata normal form. 4/787 useless extension candidates. Maximal degree in co-relation 4584. Up to 606 conditions per place. [2024-01-31 16:48:03,414 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 132 selfloop transitions, 29 changer transitions 7/169 dead transitions. [2024-01-31 16:48:03,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 169 transitions, 1927 flow [2024-01-31 16:48:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:48:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:48:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 104 transitions. [2024-01-31 16:48:03,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37681159420289856 [2024-01-31 16:48:03,415 INFO L175 Difference]: Start difference. First operand has 173 places, 137 transitions, 1409 flow. Second operand 12 states and 104 transitions. [2024-01-31 16:48:03,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 169 transitions, 1927 flow [2024-01-31 16:48:03,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 169 transitions, 1871 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:03,434 INFO L231 Difference]: Finished difference. Result has 172 places, 134 transitions, 1383 flow [2024-01-31 16:48:03,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1383, PETRI_PLACES=172, PETRI_TRANSITIONS=134} [2024-01-31 16:48:03,435 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 149 predicate places. [2024-01-31 16:48:03,435 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 134 transitions, 1383 flow [2024-01-31 16:48:03,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:48:03,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:03,435 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:03,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:03,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-01-31 16:48:03,647 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:03,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -623596933, now seen corresponding path program 47 times [2024-01-31 16:48:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506746061] [2024-01-31 16:48:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:03,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506746061] [2024-01-31 16:48:04,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506746061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143511729] [2024-01-31 16:48:04,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:04,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:04,035 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:04,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-31 16:48:04,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:48:04,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:04,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:48:04,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:04,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:04,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-01-31 16:48:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:04,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:04,633 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:04,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:48:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:04,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143511729] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:04,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:04,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-01-31 16:48:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211372952] [2024-01-31 16:48:04,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:04,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:48:04,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:48:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:48:04,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:04,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 134 transitions, 1383 flow. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:48:04,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:04,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:04,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:05,011 INFO L124 PetriNetUnfolderBase]: 418/755 cut-off events. [2024-01-31 16:48:05,011 INFO L125 PetriNetUnfolderBase]: For 5626/5626 co-relation queries the response was YES. [2024-01-31 16:48:05,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 755 events. 418/755 cut-off events. For 5626/5626 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3327 event pairs, 127 based on Foata normal form. 4/759 useless extension candidates. Maximal degree in co-relation 4507. Up to 615 conditions per place. [2024-01-31 16:48:05,017 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 119 selfloop transitions, 31 changer transitions 1/152 dead transitions. [2024-01-31 16:48:05,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 152 transitions, 1823 flow [2024-01-31 16:48:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:48:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:48:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-01-31 16:48:05,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201581027667984 [2024-01-31 16:48:05,018 INFO L175 Difference]: Start difference. First operand has 172 places, 134 transitions, 1383 flow. Second operand 11 states and 81 transitions. [2024-01-31 16:48:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 152 transitions, 1823 flow [2024-01-31 16:48:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 152 transitions, 1750 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-01-31 16:48:05,036 INFO L231 Difference]: Finished difference. Result has 169 places, 135 transitions, 1390 flow [2024-01-31 16:48:05,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1390, PETRI_PLACES=169, PETRI_TRANSITIONS=135} [2024-01-31 16:48:05,037 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 146 predicate places. [2024-01-31 16:48:05,037 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 135 transitions, 1390 flow [2024-01-31 16:48:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 21 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:48:05,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:05,037 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:05,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:05,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-31 16:48:05,250 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:05,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:05,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2141990906, now seen corresponding path program 48 times [2024-01-31 16:48:05,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:05,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608012376] [2024-01-31 16:48:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:05,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:05,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:05,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608012376] [2024-01-31 16:48:05,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608012376] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:05,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844654056] [2024-01-31 16:48:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:48:05,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:05,588 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:05,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-31 16:48:05,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:48:05,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:05,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:48:05,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:05,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:06,065 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:06,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:48:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844654056] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:06,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-01-31 16:48:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262498148] [2024-01-31 16:48:06,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:48:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:48:06,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:48:06,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:06,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 135 transitions, 1390 flow. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:48:06,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:06,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:06,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:06,403 INFO L124 PetriNetUnfolderBase]: 420/754 cut-off events. [2024-01-31 16:48:06,404 INFO L125 PetriNetUnfolderBase]: For 5525/5525 co-relation queries the response was YES. [2024-01-31 16:48:06,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4567 conditions, 754 events. 420/754 cut-off events. For 5525/5525 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3307 event pairs, 131 based on Foata normal form. 6/760 useless extension candidates. Maximal degree in co-relation 4482. Up to 631 conditions per place. [2024-01-31 16:48:06,410 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 128 selfloop transitions, 25 changer transitions 1/155 dead transitions. [2024-01-31 16:48:06,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 155 transitions, 1842 flow [2024-01-31 16:48:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:48:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:48:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-01-31 16:48:06,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2024-01-31 16:48:06,411 INFO L175 Difference]: Start difference. First operand has 169 places, 135 transitions, 1390 flow. Second operand 9 states and 75 transitions. [2024-01-31 16:48:06,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 155 transitions, 1842 flow [2024-01-31 16:48:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 155 transitions, 1726 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-01-31 16:48:06,430 INFO L231 Difference]: Finished difference. Result has 163 places, 135 transitions, 1333 flow [2024-01-31 16:48:06,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1333, PETRI_PLACES=163, PETRI_TRANSITIONS=135} [2024-01-31 16:48:06,431 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2024-01-31 16:48:06,431 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 135 transitions, 1333 flow [2024-01-31 16:48:06,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 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 16:48:06,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:06,432 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:06,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:06,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-01-31 16:48:06,644 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:06,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1307481547, now seen corresponding path program 49 times [2024-01-31 16:48:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:06,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920351453] [2024-01-31 16:48:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:06,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:48:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920351453] [2024-01-31 16:48:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920351453] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804640242] [2024-01-31 16:48:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:48:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:07,332 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:07,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-31 16:48:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:07,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 16:48:07,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:07,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:07,798 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:07,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:48:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:07,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804640242] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:07,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:07,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-01-31 16:48:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485135400] [2024-01-31 16:48:07,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:48:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:48:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:48:07,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:07,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 135 transitions, 1333 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:48:07,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:07,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:08,261 INFO L124 PetriNetUnfolderBase]: 416/750 cut-off events. [2024-01-31 16:48:08,261 INFO L125 PetriNetUnfolderBase]: For 5012/5012 co-relation queries the response was YES. [2024-01-31 16:48:08,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 750 events. 416/750 cut-off events. For 5012/5012 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3326 event pairs, 134 based on Foata normal form. 4/754 useless extension candidates. Maximal degree in co-relation 4362. Up to 642 conditions per place. [2024-01-31 16:48:08,267 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 100 selfloop transitions, 40 changer transitions 9/150 dead transitions. [2024-01-31 16:48:08,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 150 transitions, 1726 flow [2024-01-31 16:48:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:48:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:48:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 93 transitions. [2024-01-31 16:48:08,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2888198757763975 [2024-01-31 16:48:08,268 INFO L175 Difference]: Start difference. First operand has 163 places, 135 transitions, 1333 flow. Second operand 14 states and 93 transitions. [2024-01-31 16:48:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 150 transitions, 1726 flow [2024-01-31 16:48:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 150 transitions, 1677 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-01-31 16:48:08,285 INFO L231 Difference]: Finished difference. Result has 170 places, 134 transitions, 1330 flow [2024-01-31 16:48:08,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1330, PETRI_PLACES=170, PETRI_TRANSITIONS=134} [2024-01-31 16:48:08,286 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 147 predicate places. [2024-01-31 16:48:08,286 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 134 transitions, 1330 flow [2024-01-31 16:48:08,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:48:08,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:08,286 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:08,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-01-31 16:48:08,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-01-31 16:48:08,498 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:08,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1364144407, now seen corresponding path program 50 times [2024-01-31 16:48:08,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:08,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663353629] [2024-01-31 16:48:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:08,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:08,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663353629] [2024-01-31 16:48:08,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663353629] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:08,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264921617] [2024-01-31 16:48:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:08,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:08,912 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:08,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-31 16:48:09,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:09,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:09,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 16:48:09,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:09,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:09,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:48:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:09,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:09,421 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:48:09,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:48:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264921617] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:09,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:09,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-01-31 16:48:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648129232] [2024-01-31 16:48:09,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 16:48:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 16:48:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-31 16:48:09,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 134 transitions, 1330 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:48:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:09,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:09,829 INFO L124 PetriNetUnfolderBase]: 399/708 cut-off events. [2024-01-31 16:48:09,830 INFO L125 PetriNetUnfolderBase]: For 3999/3999 co-relation queries the response was YES. [2024-01-31 16:48:09,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4204 conditions, 708 events. 399/708 cut-off events. For 3999/3999 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3049 event pairs, 121 based on Foata normal form. 4/712 useless extension candidates. Maximal degree in co-relation 4117. Up to 597 conditions per place. [2024-01-31 16:48:09,835 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 116 selfloop transitions, 26 changer transitions 4/147 dead transitions. [2024-01-31 16:48:09,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 147 transitions, 1679 flow [2024-01-31 16:48:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:48:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:48:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 74 transitions. [2024-01-31 16:48:09,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3217391304347826 [2024-01-31 16:48:09,836 INFO L175 Difference]: Start difference. First operand has 170 places, 134 transitions, 1330 flow. Second operand 10 states and 74 transitions. [2024-01-31 16:48:09,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 147 transitions, 1679 flow [2024-01-31 16:48:09,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 147 transitions, 1571 flow, removed 2 selfloop flow, removed 21 redundant places. [2024-01-31 16:48:09,850 INFO L231 Difference]: Finished difference. Result has 156 places, 132 transitions, 1257 flow [2024-01-31 16:48:09,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1257, PETRI_PLACES=156, PETRI_TRANSITIONS=132} [2024-01-31 16:48:09,850 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 133 predicate places. [2024-01-31 16:48:09,851 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 132 transitions, 1257 flow [2024-01-31 16:48:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 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 16:48:09,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:09,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:09,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:10,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-01-31 16:48:10,064 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:10,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1812951658, now seen corresponding path program 51 times [2024-01-31 16:48:10,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:10,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006422561] [2024-01-31 16:48:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:10,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:10,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:10,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006422561] [2024-01-31 16:48:10,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006422561] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:10,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456288423] [2024-01-31 16:48:10,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:10,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:10,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:10,760 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-31 16:48:11,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:48:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:11,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:48:11,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:11,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:11,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:11,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:11,489 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:48:11,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-01-31 16:48:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:11,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456288423] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:11,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:11,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 28 [2024-01-31 16:48:11,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277433518] [2024-01-31 16:48:11,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:11,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:48:11,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:48:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:48:11,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:11,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 132 transitions, 1257 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:48:11,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:11,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:11,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:12,466 INFO L124 PetriNetUnfolderBase]: 554/981 cut-off events. [2024-01-31 16:48:12,466 INFO L125 PetriNetUnfolderBase]: For 5056/5056 co-relation queries the response was YES. [2024-01-31 16:48:12,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5699 conditions, 981 events. 554/981 cut-off events. For 5056/5056 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4619 event pairs, 56 based on Foata normal form. 1/982 useless extension candidates. Maximal degree in co-relation 5622. Up to 400 conditions per place. [2024-01-31 16:48:12,473 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 112 selfloop transitions, 79 changer transitions 4/196 dead transitions. [2024-01-31 16:48:12,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 196 transitions, 2115 flow [2024-01-31 16:48:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:48:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:48:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 147 transitions. [2024-01-31 16:48:12,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31956521739130433 [2024-01-31 16:48:12,475 INFO L175 Difference]: Start difference. First operand has 156 places, 132 transitions, 1257 flow. Second operand 20 states and 147 transitions. [2024-01-31 16:48:12,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 196 transitions, 2115 flow [2024-01-31 16:48:12,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2016 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-01-31 16:48:12,492 INFO L231 Difference]: Finished difference. Result has 169 places, 145 transitions, 1536 flow [2024-01-31 16:48:12,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1536, PETRI_PLACES=169, PETRI_TRANSITIONS=145} [2024-01-31 16:48:12,494 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 146 predicate places. [2024-01-31 16:48:12,494 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 145 transitions, 1536 flow [2024-01-31 16:48:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:48:12,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:12,494 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:12,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-01-31 16:48:12,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:12,707 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:12,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash -917257212, now seen corresponding path program 52 times [2024-01-31 16:48:12,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:12,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134947544] [2024-01-31 16:48:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:12,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:13,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:13,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134947544] [2024-01-31 16:48:13,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134947544] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:13,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917972482] [2024-01-31 16:48:13,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:13,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:13,924 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-31 16:48:14,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:14,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:14,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:14,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:14,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:14,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:14,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:14,706 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:14,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917972482] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:14,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 35 [2024-01-31 16:48:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965018917] [2024-01-31 16:48:14,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:14,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:48:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:48:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:48:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:14,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 145 transitions, 1536 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:48:14,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:14,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:14,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:15,878 INFO L124 PetriNetUnfolderBase]: 573/1017 cut-off events. [2024-01-31 16:48:15,879 INFO L125 PetriNetUnfolderBase]: For 6066/6066 co-relation queries the response was YES. [2024-01-31 16:48:15,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6242 conditions, 1017 events. 573/1017 cut-off events. For 6066/6066 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4857 event pairs, 68 based on Foata normal form. 1/1018 useless extension candidates. Maximal degree in co-relation 6159. Up to 720 conditions per place. [2024-01-31 16:48:15,885 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 96 selfloop transitions, 79 changer transitions 1/177 dead transitions. [2024-01-31 16:48:15,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 177 transitions, 2100 flow [2024-01-31 16:48:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:48:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:48:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 154 transitions. [2024-01-31 16:48:15,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27898550724637683 [2024-01-31 16:48:15,886 INFO L175 Difference]: Start difference. First operand has 169 places, 145 transitions, 1536 flow. Second operand 24 states and 154 transitions. [2024-01-31 16:48:15,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 177 transitions, 2100 flow [2024-01-31 16:48:15,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 177 transitions, 1920 flow, removed 27 selfloop flow, removed 12 redundant places. [2024-01-31 16:48:15,905 INFO L231 Difference]: Finished difference. Result has 183 places, 152 transitions, 1637 flow [2024-01-31 16:48:15,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1637, PETRI_PLACES=183, PETRI_TRANSITIONS=152} [2024-01-31 16:48:15,906 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 160 predicate places. [2024-01-31 16:48:15,906 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 152 transitions, 1637 flow [2024-01-31 16:48:15,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:48:15,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:15,907 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:15,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:16,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:16,119 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:16,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1129665422, now seen corresponding path program 53 times [2024-01-31 16:48:16,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:16,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258586841] [2024-01-31 16:48:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258586841] [2024-01-31 16:48:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258586841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103992153] [2024-01-31 16:48:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:16,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:16,835 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:16,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-31 16:48:17,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:48:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:17,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:48:17,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:17,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:17,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-31 16:48:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:17,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:17,648 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:17,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:48:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103992153] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:17,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-01-31 16:48:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542327216] [2024-01-31 16:48:17,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:48:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:48:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:48:17,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:17,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 152 transitions, 1637 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:48:17,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:17,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:17,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:18,912 INFO L124 PetriNetUnfolderBase]: 659/1181 cut-off events. [2024-01-31 16:48:18,912 INFO L125 PetriNetUnfolderBase]: For 8050/8050 co-relation queries the response was YES. [2024-01-31 16:48:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 1181 events. 659/1181 cut-off events. For 8050/8050 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5759 event pairs, 73 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7274. Up to 769 conditions per place. [2024-01-31 16:48:18,921 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 130 selfloop transitions, 91 changer transitions 5/227 dead transitions. [2024-01-31 16:48:18,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 227 transitions, 2630 flow [2024-01-31 16:48:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:48:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:48:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 205 transitions. [2024-01-31 16:48:18,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33011272141706927 [2024-01-31 16:48:18,922 INFO L175 Difference]: Start difference. First operand has 183 places, 152 transitions, 1637 flow. Second operand 27 states and 205 transitions. [2024-01-31 16:48:18,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 227 transitions, 2630 flow [2024-01-31 16:48:18,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 227 transitions, 2466 flow, removed 23 selfloop flow, removed 20 redundant places. [2024-01-31 16:48:18,948 INFO L231 Difference]: Finished difference. Result has 194 places, 172 transitions, 2009 flow [2024-01-31 16:48:18,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2009, PETRI_PLACES=194, PETRI_TRANSITIONS=172} [2024-01-31 16:48:18,949 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 171 predicate places. [2024-01-31 16:48:18,949 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 172 transitions, 2009 flow [2024-01-31 16:48:18,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:48:18,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:18,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:18,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:19,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:19,162 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:19,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash -217389106, now seen corresponding path program 54 times [2024-01-31 16:48:19,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:19,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529185604] [2024-01-31 16:48:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:19,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:20,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529185604] [2024-01-31 16:48:20,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529185604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46137459] [2024-01-31 16:48:20,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:48:20,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:20,490 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:20,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-31 16:48:20,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:48:20,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:20,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 16:48:20,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:21,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:21,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:21,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:21,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:21,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 117 [2024-01-31 16:48:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:21,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46137459] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:21,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:21,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 38 [2024-01-31 16:48:21,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951251995] [2024-01-31 16:48:21,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:48:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:48:21,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:48:21,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:21,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 172 transitions, 2009 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 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 16:48:21,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:21,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:21,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:22,861 INFO L124 PetriNetUnfolderBase]: 762/1368 cut-off events. [2024-01-31 16:48:22,861 INFO L125 PetriNetUnfolderBase]: For 11935/11935 co-relation queries the response was YES. [2024-01-31 16:48:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9029 conditions, 1368 events. 762/1368 cut-off events. For 11935/11935 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7039 event pairs, 197 based on Foata normal form. 9/1377 useless extension candidates. Maximal degree in co-relation 8938. Up to 899 conditions per place. [2024-01-31 16:48:22,873 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 129 selfloop transitions, 105 changer transitions 11/246 dead transitions. [2024-01-31 16:48:22,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 246 transitions, 3096 flow [2024-01-31 16:48:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:48:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:48:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 231 transitions. [2024-01-31 16:48:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-31 16:48:22,879 INFO L175 Difference]: Start difference. First operand has 194 places, 172 transitions, 2009 flow. Second operand 33 states and 231 transitions. [2024-01-31 16:48:22,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 246 transitions, 3096 flow [2024-01-31 16:48:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 246 transitions, 2776 flow, removed 119 selfloop flow, removed 16 redundant places. [2024-01-31 16:48:22,920 INFO L231 Difference]: Finished difference. Result has 216 places, 193 transitions, 2272 flow [2024-01-31 16:48:22,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2272, PETRI_PLACES=216, PETRI_TRANSITIONS=193} [2024-01-31 16:48:22,921 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 193 predicate places. [2024-01-31 16:48:22,921 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 193 transitions, 2272 flow [2024-01-31 16:48:22,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 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 16:48:22,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:22,922 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:22,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-01-31 16:48:23,135 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:23,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1809022614, now seen corresponding path program 55 times [2024-01-31 16:48:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:23,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967295844] [2024-01-31 16:48:23,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:23,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:23,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:23,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967295844] [2024-01-31 16:48:23,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967295844] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:23,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390297585] [2024-01-31 16:48:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:48:23,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:23,921 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:23,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-31 16:48:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:24,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:24,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:24,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:24,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:24,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:24,694 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:24,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-31 16:48:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390297585] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:24,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2024-01-31 16:48:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799640203] [2024-01-31 16:48:24,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:48:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:48:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:48:24,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:24,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 193 transitions, 2272 flow. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:48:24,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:24,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:24,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:25,713 INFO L124 PetriNetUnfolderBase]: 759/1363 cut-off events. [2024-01-31 16:48:25,713 INFO L125 PetriNetUnfolderBase]: For 11976/11976 co-relation queries the response was YES. [2024-01-31 16:48:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9115 conditions, 1363 events. 759/1363 cut-off events. For 11976/11976 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7003 event pairs, 114 based on Foata normal form. 1/1364 useless extension candidates. Maximal degree in co-relation 9017. Up to 997 conditions per place. [2024-01-31 16:48:25,725 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 137 selfloop transitions, 85 changer transitions 3/226 dead transitions. [2024-01-31 16:48:25,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 226 transitions, 2879 flow [2024-01-31 16:48:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:48:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:48:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 143 transitions. [2024-01-31 16:48:25,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3108695652173913 [2024-01-31 16:48:25,728 INFO L175 Difference]: Start difference. First operand has 216 places, 193 transitions, 2272 flow. Second operand 20 states and 143 transitions. [2024-01-31 16:48:25,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 226 transitions, 2879 flow [2024-01-31 16:48:25,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 226 transitions, 2621 flow, removed 59 selfloop flow, removed 23 redundant places. [2024-01-31 16:48:25,772 INFO L231 Difference]: Finished difference. Result has 213 places, 195 transitions, 2224 flow [2024-01-31 16:48:25,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2224, PETRI_PLACES=213, PETRI_TRANSITIONS=195} [2024-01-31 16:48:25,775 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2024-01-31 16:48:25,775 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 195 transitions, 2224 flow [2024-01-31 16:48:25,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 32 states have internal predecessors, (153), 0 states have call successors, (0), 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 16:48:25,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:25,775 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:25,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-01-31 16:48:25,988 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:25,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1305615118, now seen corresponding path program 56 times [2024-01-31 16:48:25,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060048029] [2024-01-31 16:48:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:26,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:26,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060048029] [2024-01-31 16:48:26,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060048029] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:26,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113506795] [2024-01-31 16:48:26,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:26,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:26,457 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:26,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-31 16:48:26,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:26,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-31 16:48:26,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:26,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:26,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:48:26,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:27,194 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:27,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:27,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113506795] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:27,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-01-31 16:48:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221096578] [2024-01-31 16:48:27,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:48:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:48:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:48:27,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:27,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 195 transitions, 2224 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:48:27,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:27,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:27,983 INFO L124 PetriNetUnfolderBase]: 765/1378 cut-off events. [2024-01-31 16:48:27,983 INFO L125 PetriNetUnfolderBase]: For 11708/11708 co-relation queries the response was YES. [2024-01-31 16:48:27,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9046 conditions, 1378 events. 765/1378 cut-off events. For 11708/11708 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7120 event pairs, 116 based on Foata normal form. 1/1379 useless extension candidates. Maximal degree in co-relation 8946. Up to 997 conditions per place. [2024-01-31 16:48:27,994 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 146 selfloop transitions, 74 changer transitions 3/224 dead transitions. [2024-01-31 16:48:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 224 transitions, 2806 flow [2024-01-31 16:48:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:48:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:48:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2024-01-31 16:48:27,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233695652173913 [2024-01-31 16:48:27,996 INFO L175 Difference]: Start difference. First operand has 213 places, 195 transitions, 2224 flow. Second operand 16 states and 119 transitions. [2024-01-31 16:48:27,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 224 transitions, 2806 flow [2024-01-31 16:48:28,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 224 transitions, 2626 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-01-31 16:48:28,036 INFO L231 Difference]: Finished difference. Result has 212 places, 196 transitions, 2214 flow [2024-01-31 16:48:28,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2214, PETRI_PLACES=212, PETRI_TRANSITIONS=196} [2024-01-31 16:48:28,036 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 189 predicate places. [2024-01-31 16:48:28,037 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 196 transitions, 2214 flow [2024-01-31 16:48:28,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:48:28,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:28,037 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:28,250 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:28,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash 663528464, now seen corresponding path program 57 times [2024-01-31 16:48:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656991764] [2024-01-31 16:48:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:28,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:28,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656991764] [2024-01-31 16:48:28,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656991764] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115619866] [2024-01-31 16:48:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:28,742 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:28,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-31 16:48:29,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:48:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:29,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:48:29,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:29,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:29,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:48:29,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:29,384 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:29,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:48:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115619866] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:29,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-01-31 16:48:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491948736] [2024-01-31 16:48:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:29,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:48:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:48:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:48:29,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:29,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 196 transitions, 2214 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:48:29,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:29,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:29,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:30,296 INFO L124 PetriNetUnfolderBase]: 845/1527 cut-off events. [2024-01-31 16:48:30,296 INFO L125 PetriNetUnfolderBase]: For 13795/13795 co-relation queries the response was YES. [2024-01-31 16:48:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 1527 events. 845/1527 cut-off events. For 13795/13795 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8014 event pairs, 136 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 9981. Up to 1290 conditions per place. [2024-01-31 16:48:30,308 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 198 selfloop transitions, 49 changer transitions 4/252 dead transitions. [2024-01-31 16:48:30,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 252 transitions, 3219 flow [2024-01-31 16:48:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:48:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:48:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 155 transitions. [2024-01-31 16:48:30,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-01-31 16:48:30,309 INFO L175 Difference]: Start difference. First operand has 212 places, 196 transitions, 2214 flow. Second operand 20 states and 155 transitions. [2024-01-31 16:48:30,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 252 transitions, 3219 flow [2024-01-31 16:48:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 252 transitions, 3065 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-01-31 16:48:30,351 INFO L231 Difference]: Finished difference. Result has 221 places, 208 transitions, 2406 flow [2024-01-31 16:48:30,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2406, PETRI_PLACES=221, PETRI_TRANSITIONS=208} [2024-01-31 16:48:30,352 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 198 predicate places. [2024-01-31 16:48:30,352 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 208 transitions, 2406 flow [2024-01-31 16:48:30,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:48:30,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:30,352 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:30,566 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:30,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1340494292, now seen corresponding path program 58 times [2024-01-31 16:48:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318020066] [2024-01-31 16:48:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:30,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:31,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:31,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318020066] [2024-01-31 16:48:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318020066] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:31,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159560145] [2024-01-31 16:48:31,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:31,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:31,310 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:31,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-31 16:48:31,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:31,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:31,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:31,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:31,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:31,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:32,113 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:32,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:32,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159560145] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:32,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:32,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-01-31 16:48:32,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120658398] [2024-01-31 16:48:32,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:32,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:48:32,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:32,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:48:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:48:32,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:32,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 208 transitions, 2406 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:48:32,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:32,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:32,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:33,438 INFO L124 PetriNetUnfolderBase]: 920/1666 cut-off events. [2024-01-31 16:48:33,438 INFO L125 PetriNetUnfolderBase]: For 17355/17355 co-relation queries the response was YES. [2024-01-31 16:48:33,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 1666 events. 920/1666 cut-off events. For 17355/17355 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8996 event pairs, 165 based on Foata normal form. 2/1668 useless extension candidates. Maximal degree in co-relation 11123. Up to 1433 conditions per place. [2024-01-31 16:48:33,454 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 195 selfloop transitions, 72 changer transitions 4/272 dead transitions. [2024-01-31 16:48:33,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 272 transitions, 3534 flow [2024-01-31 16:48:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:48:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:48:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 179 transitions. [2024-01-31 16:48:33,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242753623188406 [2024-01-31 16:48:33,455 INFO L175 Difference]: Start difference. First operand has 221 places, 208 transitions, 2406 flow. Second operand 24 states and 179 transitions. [2024-01-31 16:48:33,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 272 transitions, 3534 flow [2024-01-31 16:48:33,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 272 transitions, 3353 flow, removed 64 selfloop flow, removed 11 redundant places. [2024-01-31 16:48:33,523 INFO L231 Difference]: Finished difference. Result has 240 places, 232 transitions, 2873 flow [2024-01-31 16:48:33,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2873, PETRI_PLACES=240, PETRI_TRANSITIONS=232} [2024-01-31 16:48:33,524 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 217 predicate places. [2024-01-31 16:48:33,524 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 232 transitions, 2873 flow [2024-01-31 16:48:33,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:48:33,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:33,525 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:33,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-01-31 16:48:33,738 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 180420016, now seen corresponding path program 59 times [2024-01-31 16:48:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:33,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482069052] [2024-01-31 16:48:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:34,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482069052] [2024-01-31 16:48:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482069052] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263611198] [2024-01-31 16:48:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:34,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:34,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:34,390 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:34,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-01-31 16:48:34,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:48:34,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:34,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-31 16:48:34,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:34,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:34,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-31 16:48:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-01-31 16:48:35,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:35,278 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:35,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:48:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263611198] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:35,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:35,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 10] total 38 [2024-01-31 16:48:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142282092] [2024-01-31 16:48:35,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:48:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:48:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:48:35,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:35,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 232 transitions, 2873 flow. Second operand has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 0 states have call successors, (0), 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 16:48:35,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:35,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:35,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:36,348 INFO L124 PetriNetUnfolderBase]: 968/1755 cut-off events. [2024-01-31 16:48:36,348 INFO L125 PetriNetUnfolderBase]: For 20880/20880 co-relation queries the response was YES. [2024-01-31 16:48:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 1755 events. 968/1755 cut-off events. For 20880/20880 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9601 event pairs, 172 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 12244. Up to 1534 conditions per place. [2024-01-31 16:48:36,363 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 211 selfloop transitions, 68 changer transitions 4/284 dead transitions. [2024-01-31 16:48:36,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 284 transitions, 3925 flow [2024-01-31 16:48:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:48:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:48:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 173 transitions. [2024-01-31 16:48:36,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134057971014493 [2024-01-31 16:48:36,364 INFO L175 Difference]: Start difference. First operand has 240 places, 232 transitions, 2873 flow. Second operand 24 states and 173 transitions. [2024-01-31 16:48:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 284 transitions, 3925 flow [2024-01-31 16:48:36,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 284 transitions, 3549 flow, removed 150 selfloop flow, removed 14 redundant places. [2024-01-31 16:48:36,442 INFO L231 Difference]: Finished difference. Result has 251 places, 246 transitions, 2958 flow [2024-01-31 16:48:36,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2958, PETRI_PLACES=251, PETRI_TRANSITIONS=246} [2024-01-31 16:48:36,442 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 228 predicate places. [2024-01-31 16:48:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 246 transitions, 2958 flow [2024-01-31 16:48:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 states have internal predecessors, (183), 0 states have call successors, (0), 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 16:48:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:36,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-01-31 16:48:36,656 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash -150531832, now seen corresponding path program 60 times [2024-01-31 16:48:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26833667] [2024-01-31 16:48:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:48:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26833667] [2024-01-31 16:48:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26833667] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516235129] [2024-01-31 16:48:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:48:37,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:37,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:37,384 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:37,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-01-31 16:48:37,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:48:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:37,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:48:37,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:37,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:37,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:37,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:38,210 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:38,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-31 16:48:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516235129] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:38,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 31 [2024-01-31 16:48:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067976696] [2024-01-31 16:48:38,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 16:48:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 16:48:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2024-01-31 16:48:38,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:38,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 246 transitions, 2958 flow. Second operand has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 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 16:48:38,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:38,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:38,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:39,335 INFO L124 PetriNetUnfolderBase]: 1024/1863 cut-off events. [2024-01-31 16:48:39,335 INFO L125 PetriNetUnfolderBase]: For 23582/23582 co-relation queries the response was YES. [2024-01-31 16:48:39,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13077 conditions, 1863 events. 1024/1863 cut-off events. For 23582/23582 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10436 event pairs, 178 based on Foata normal form. 2/1863 useless extension candidates. Maximal degree in co-relation 12963. Up to 1655 conditions per place. [2024-01-31 16:48:39,354 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 224 selfloop transitions, 64 changer transitions 3/292 dead transitions. [2024-01-31 16:48:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 292 transitions, 4004 flow [2024-01-31 16:48:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:48:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:48:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 162 transitions. [2024-01-31 16:48:39,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30623818525519847 [2024-01-31 16:48:39,356 INFO L175 Difference]: Start difference. First operand has 251 places, 246 transitions, 2958 flow. Second operand 23 states and 162 transitions. [2024-01-31 16:48:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 292 transitions, 4004 flow [2024-01-31 16:48:39,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 292 transitions, 3721 flow, removed 97 selfloop flow, removed 17 redundant places. [2024-01-31 16:48:39,448 INFO L231 Difference]: Finished difference. Result has 259 places, 257 transitions, 3052 flow [2024-01-31 16:48:39,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3052, PETRI_PLACES=259, PETRI_TRANSITIONS=257} [2024-01-31 16:48:39,448 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 236 predicate places. [2024-01-31 16:48:39,449 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 257 transitions, 3052 flow [2024-01-31 16:48:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 0 states have call successors, (0), 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 16:48:39,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:39,449 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:39,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-01-31 16:48:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:39,662 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1947844656, now seen corresponding path program 61 times [2024-01-31 16:48:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481724070] [2024-01-31 16:48:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481724070] [2024-01-31 16:48:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481724070] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756546789] [2024-01-31 16:48:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:48:40,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:40,136 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-01-31 16:48:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:40,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:40,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:40,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:40,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:40,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:40,895 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:40,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756546789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:40,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:40,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-31 16:48:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691873564] [2024-01-31 16:48:40,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:48:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:48:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:48:40,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:40,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 257 transitions, 3052 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:48:40,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:40,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:40,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:41,753 INFO L124 PetriNetUnfolderBase]: 1028/1881 cut-off events. [2024-01-31 16:48:41,754 INFO L125 PetriNetUnfolderBase]: For 24484/24484 co-relation queries the response was YES. [2024-01-31 16:48:41,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13445 conditions, 1881 events. 1028/1881 cut-off events. For 24484/24484 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10624 event pairs, 186 based on Foata normal form. 2/1881 useless extension candidates. Maximal degree in co-relation 13329. Up to 1634 conditions per place. [2024-01-31 16:48:41,768 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 241 selfloop transitions, 50 changer transitions 6/298 dead transitions. [2024-01-31 16:48:41,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 298 transitions, 4004 flow [2024-01-31 16:48:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:48:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:48:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 147 transitions. [2024-01-31 16:48:41,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33638443935926776 [2024-01-31 16:48:41,769 INFO L175 Difference]: Start difference. First operand has 259 places, 257 transitions, 3052 flow. Second operand 19 states and 147 transitions. [2024-01-31 16:48:41,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 298 transitions, 4004 flow [2024-01-31 16:48:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 298 transitions, 3818 flow, removed 50 selfloop flow, removed 17 redundant places. [2024-01-31 16:48:41,842 INFO L231 Difference]: Finished difference. Result has 262 places, 259 transitions, 3038 flow [2024-01-31 16:48:41,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3038, PETRI_PLACES=262, PETRI_TRANSITIONS=259} [2024-01-31 16:48:41,843 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 239 predicate places. [2024-01-31 16:48:41,843 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 259 transitions, 3038 flow [2024-01-31 16:48:41,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:48:41,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:41,843 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:41,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:42,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-01-31 16:48:42,056 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash 862715978, now seen corresponding path program 62 times [2024-01-31 16:48:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:42,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541822284] [2024-01-31 16:48:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:42,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:42,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541822284] [2024-01-31 16:48:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541822284] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737372207] [2024-01-31 16:48:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:48:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:42,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:42,460 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:42,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-01-31 16:48:42,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:48:42,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:42,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:48:42,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:42,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:42,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:48:42,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:43,271 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:43,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:43,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737372207] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:43,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:43,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-01-31 16:48:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235978663] [2024-01-31 16:48:43,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:48:43,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:48:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:48:43,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:43,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 259 transitions, 3038 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:48:43,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:43,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:43,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:44,468 INFO L124 PetriNetUnfolderBase]: 1052/1943 cut-off events. [2024-01-31 16:48:44,468 INFO L125 PetriNetUnfolderBase]: For 25953/25953 co-relation queries the response was YES. [2024-01-31 16:48:44,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13816 conditions, 1943 events. 1052/1943 cut-off events. For 25953/25953 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11186 event pairs, 197 based on Foata normal form. 2/1943 useless extension candidates. Maximal degree in co-relation 13699. Up to 1633 conditions per place. [2024-01-31 16:48:44,486 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 237 selfloop transitions, 61 changer transitions 6/305 dead transitions. [2024-01-31 16:48:44,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 305 transitions, 3948 flow [2024-01-31 16:48:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-31 16:48:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-31 16:48:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2024-01-31 16:48:44,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-01-31 16:48:44,487 INFO L175 Difference]: Start difference. First operand has 262 places, 259 transitions, 3038 flow. Second operand 21 states and 162 transitions. [2024-01-31 16:48:44,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 305 transitions, 3948 flow [2024-01-31 16:48:44,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 305 transitions, 3855 flow, removed 15 selfloop flow, removed 16 redundant places. [2024-01-31 16:48:44,582 INFO L231 Difference]: Finished difference. Result has 270 places, 263 transitions, 3206 flow [2024-01-31 16:48:44,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3206, PETRI_PLACES=270, PETRI_TRANSITIONS=263} [2024-01-31 16:48:44,585 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2024-01-31 16:48:44,585 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 263 transitions, 3206 flow [2024-01-31 16:48:44,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:48:44,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:44,585 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:44,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:44,798 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:44,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash -824118416, now seen corresponding path program 63 times [2024-01-31 16:48:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:44,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105078667] [2024-01-31 16:48:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:45,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105078667] [2024-01-31 16:48:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105078667] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733690520] [2024-01-31 16:48:45,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:48:45,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:45,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:45,333 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:45,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-01-31 16:48:45,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:48:45,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:45,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:48:45,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:45,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:45,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:45,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:46,097 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:46,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:48:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:46,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733690520] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:46,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:46,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 26 [2024-01-31 16:48:46,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535717560] [2024-01-31 16:48:46,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:48:46,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:48:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:48:46,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:46,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 263 transitions, 3206 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 16:48:46,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:46,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:46,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:47,157 INFO L124 PetriNetUnfolderBase]: 1059/1963 cut-off events. [2024-01-31 16:48:47,158 INFO L125 PetriNetUnfolderBase]: For 28814/28814 co-relation queries the response was YES. [2024-01-31 16:48:47,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14407 conditions, 1963 events. 1059/1963 cut-off events. For 28814/28814 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11373 event pairs, 208 based on Foata normal form. 2/1965 useless extension candidates. Maximal degree in co-relation 14287. Up to 1701 conditions per place. [2024-01-31 16:48:47,178 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 247 selfloop transitions, 53 changer transitions 5/306 dead transitions. [2024-01-31 16:48:47,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 306 transitions, 4113 flow [2024-01-31 16:48:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:48:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:48:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 152 transitions. [2024-01-31 16:48:47,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-31 16:48:47,179 INFO L175 Difference]: Start difference. First operand has 270 places, 263 transitions, 3206 flow. Second operand 19 states and 152 transitions. [2024-01-31 16:48:47,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 306 transitions, 4113 flow [2024-01-31 16:48:47,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 306 transitions, 3968 flow, removed 36 selfloop flow, removed 17 redundant places. [2024-01-31 16:48:47,283 INFO L231 Difference]: Finished difference. Result has 273 places, 265 transitions, 3249 flow [2024-01-31 16:48:47,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3249, PETRI_PLACES=273, PETRI_TRANSITIONS=265} [2024-01-31 16:48:47,285 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 250 predicate places. [2024-01-31 16:48:47,286 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 265 transitions, 3249 flow [2024-01-31 16:48:47,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 16:48:47,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:47,286 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:47,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-01-31 16:48:47,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:47,500 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:47,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1088196286, now seen corresponding path program 64 times [2024-01-31 16:48:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:47,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753270604] [2024-01-31 16:48:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:48,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753270604] [2024-01-31 16:48:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753270604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579837978] [2024-01-31 16:48:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:48:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:48,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:48,712 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:48,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-01-31 16:48:49,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:48:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:49,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:49,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:49,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:49,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:49,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:49,561 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:48:49,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:48:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:49,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579837978] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:49,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 38 [2024-01-31 16:48:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201410195] [2024-01-31 16:48:49,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:48:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:48:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:48:49,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:49,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 265 transitions, 3249 flow. Second operand has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 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 16:48:49,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:49,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:51,109 INFO L124 PetriNetUnfolderBase]: 1134/2102 cut-off events. [2024-01-31 16:48:51,109 INFO L125 PetriNetUnfolderBase]: For 31940/31940 co-relation queries the response was YES. [2024-01-31 16:48:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15514 conditions, 2102 events. 1134/2102 cut-off events. For 31940/31940 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12450 event pairs, 411 based on Foata normal form. 3/2103 useless extension candidates. Maximal degree in co-relation 15394. Up to 1836 conditions per place. [2024-01-31 16:48:51,132 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 253 selfloop transitions, 71 changer transitions 4/329 dead transitions. [2024-01-31 16:48:51,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 329 transitions, 4704 flow [2024-01-31 16:48:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:48:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:48:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 179 transitions. [2024-01-31 16:48:51,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242753623188406 [2024-01-31 16:48:51,133 INFO L175 Difference]: Start difference. First operand has 273 places, 265 transitions, 3249 flow. Second operand 24 states and 179 transitions. [2024-01-31 16:48:51,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 329 transitions, 4704 flow [2024-01-31 16:48:51,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 329 transitions, 4585 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-01-31 16:48:51,251 INFO L231 Difference]: Finished difference. Result has 287 places, 287 transitions, 3857 flow [2024-01-31 16:48:51,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3857, PETRI_PLACES=287, PETRI_TRANSITIONS=287} [2024-01-31 16:48:51,252 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 264 predicate places. [2024-01-31 16:48:51,252 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 287 transitions, 3857 flow [2024-01-31 16:48:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.605263157894737) internal successors, (175), 38 states have internal predecessors, (175), 0 states have call successors, (0), 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 16:48:51,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:51,252 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:51,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:51,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-01-31 16:48:51,465 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:51,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash -823682054, now seen corresponding path program 65 times [2024-01-31 16:48:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:51,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714424716] [2024-01-31 16:48:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:48:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714424716] [2024-01-31 16:48:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714424716] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755353846] [2024-01-31 16:48:52,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:48:52,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:52,698 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-01-31 16:48:53,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:48:53,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:53,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:48:53,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:53,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:53,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-31 16:48:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-31 16:48:53,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:53,639 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:53,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:48:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:53,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755353846] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:53,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:53,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 10] total 43 [2024-01-31 16:48:53,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968024451] [2024-01-31 16:48:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-01-31 16:48:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-01-31 16:48:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2024-01-31 16:48:53,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:53,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 287 transitions, 3857 flow. Second operand has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 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 16:48:53,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:53,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:53,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:55,510 INFO L124 PetriNetUnfolderBase]: 1194/2218 cut-off events. [2024-01-31 16:48:55,510 INFO L125 PetriNetUnfolderBase]: For 46429/46429 co-relation queries the response was YES. [2024-01-31 16:48:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17865 conditions, 2218 events. 1194/2218 cut-off events. For 46429/46429 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13308 event pairs, 425 based on Foata normal form. 2/2218 useless extension candidates. Maximal degree in co-relation 17739. Up to 1940 conditions per place. [2024-01-31 16:48:55,535 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 264 selfloop transitions, 75 changer transitions 2/342 dead transitions. [2024-01-31 16:48:55,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 342 transitions, 5342 flow [2024-01-31 16:48:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:48:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:48:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 201 transitions. [2024-01-31 16:48:55,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29130434782608694 [2024-01-31 16:48:55,537 INFO L175 Difference]: Start difference. First operand has 287 places, 287 transitions, 3857 flow. Second operand 30 states and 201 transitions. [2024-01-31 16:48:55,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 342 transitions, 5342 flow [2024-01-31 16:48:55,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 342 transitions, 4858 flow, removed 213 selfloop flow, removed 13 redundant places. [2024-01-31 16:48:55,704 INFO L231 Difference]: Finished difference. Result has 308 places, 302 transitions, 3995 flow [2024-01-31 16:48:55,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3995, PETRI_PLACES=308, PETRI_TRANSITIONS=302} [2024-01-31 16:48:55,705 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 285 predicate places. [2024-01-31 16:48:55,705 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 302 transitions, 3995 flow [2024-01-31 16:48:55,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 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 16:48:55,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:55,706 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:55,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:55,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:55,924 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:55,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1341174952, now seen corresponding path program 66 times [2024-01-31 16:48:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:55,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668084757] [2024-01-31 16:48:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:55,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:56,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:56,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668084757] [2024-01-31 16:48:56,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668084757] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:56,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610563352] [2024-01-31 16:48:56,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:48:56,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:56,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:56,417 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:56,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-01-31 16:48:56,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:48:56,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:48:56,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:48:56,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:56,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:56,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:48:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:56,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:57,193 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:48:57,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-01-31 16:48:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610563352] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:48:57,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:48:57,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2024-01-31 16:48:57,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347789022] [2024-01-31 16:48:57,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:48:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:48:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:48:57,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:48:57,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:48:57,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:48:57,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 302 transitions, 3995 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:48:57,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:48:57,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:48:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:48:58,251 INFO L124 PetriNetUnfolderBase]: 1296/2399 cut-off events. [2024-01-31 16:48:58,252 INFO L125 PetriNetUnfolderBase]: For 60973/60973 co-relation queries the response was YES. [2024-01-31 16:48:58,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20277 conditions, 2399 events. 1296/2399 cut-off events. For 60973/60973 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14725 event pairs, 256 based on Foata normal form. 1/2398 useless extension candidates. Maximal degree in co-relation 20145. Up to 1070 conditions per place. [2024-01-31 16:48:58,280 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 237 selfloop transitions, 117 changer transitions 2/357 dead transitions. [2024-01-31 16:48:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 357 transitions, 5610 flow [2024-01-31 16:48:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:48:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:48:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 111 transitions. [2024-01-31 16:48:58,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447204968944099 [2024-01-31 16:48:58,282 INFO L175 Difference]: Start difference. First operand has 308 places, 302 transitions, 3995 flow. Second operand 14 states and 111 transitions. [2024-01-31 16:48:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 357 transitions, 5610 flow [2024-01-31 16:48:58,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 357 transitions, 5272 flow, removed 124 selfloop flow, removed 22 redundant places. [2024-01-31 16:48:58,493 INFO L231 Difference]: Finished difference. Result has 304 places, 316 transitions, 4320 flow [2024-01-31 16:48:58,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4320, PETRI_PLACES=304, PETRI_TRANSITIONS=316} [2024-01-31 16:48:58,494 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 281 predicate places. [2024-01-31 16:48:58,494 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 316 transitions, 4320 flow [2024-01-31 16:48:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:48:58,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:48:58,495 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:48:58,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-01-31 16:48:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:58,707 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:48:58,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:48:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1121832024, now seen corresponding path program 67 times [2024-01-31 16:48:58,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:48:58,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446504927] [2024-01-31 16:48:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:48:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:48:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:48:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446504927] [2024-01-31 16:48:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446504927] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:48:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683153580] [2024-01-31 16:48:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:48:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:48:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:48:59,203 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:48:59,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-01-31 16:48:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:48:59,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:48:59,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:48:59,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:48:59,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:48:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:48:59,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:48:59,981 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:48:59,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:49:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:00,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683153580] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:00,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:00,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-31 16:49:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289882491] [2024-01-31 16:49:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:49:00,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:49:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:49:00,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:00,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 316 transitions, 4320 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:49:00,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:00,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:00,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:01,253 INFO L124 PetriNetUnfolderBase]: 1360/2519 cut-off events. [2024-01-31 16:49:01,254 INFO L125 PetriNetUnfolderBase]: For 70214/70214 co-relation queries the response was YES. [2024-01-31 16:49:01,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 2519 events. 1360/2519 cut-off events. For 70214/70214 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15629 event pairs, 399 based on Foata normal form. 2/2519 useless extension candidates. Maximal degree in co-relation 22054. Up to 1920 conditions per place. [2024-01-31 16:49:01,282 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 280 selfloop transitions, 99 changer transitions 3/383 dead transitions. [2024-01-31 16:49:01,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 383 transitions, 6155 flow [2024-01-31 16:49:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 172 transitions. [2024-01-31 16:49:01,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33992094861660077 [2024-01-31 16:49:01,284 INFO L175 Difference]: Start difference. First operand has 304 places, 316 transitions, 4320 flow. Second operand 22 states and 172 transitions. [2024-01-31 16:49:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 383 transitions, 6155 flow [2024-01-31 16:49:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 383 transitions, 5940 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-01-31 16:49:01,517 INFO L231 Difference]: Finished difference. Result has 324 places, 335 transitions, 4897 flow [2024-01-31 16:49:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4897, PETRI_PLACES=324, PETRI_TRANSITIONS=335} [2024-01-31 16:49:01,526 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 301 predicate places. [2024-01-31 16:49:01,527 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 335 transitions, 4897 flow [2024-01-31 16:49:01,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:49:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:01,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:01,740 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:01,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2108330046, now seen corresponding path program 68 times [2024-01-31 16:49:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:01,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184962406] [2024-01-31 16:49:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184962406] [2024-01-31 16:49:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184962406] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967696486] [2024-01-31 16:49:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:02,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:02,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:02,367 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:02,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-01-31 16:49:02,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:02,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:02,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:49:02,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:02,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:02,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:49:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:49:02,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:03,177 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:03,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-31 16:49:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:03,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967696486] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:03,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:03,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 27 [2024-01-31 16:49:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974752208] [2024-01-31 16:49:03,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:03,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:49:03,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:49:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:49:03,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:03,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 335 transitions, 4897 flow. Second operand has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:49:03,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:03,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:03,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:04,367 INFO L124 PetriNetUnfolderBase]: 1431/2650 cut-off events. [2024-01-31 16:49:04,368 INFO L125 PetriNetUnfolderBase]: For 89335/89335 co-relation queries the response was YES. [2024-01-31 16:49:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24659 conditions, 2650 events. 1431/2650 cut-off events. For 89335/89335 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 16656 event pairs, 477 based on Foata normal form. 3/2651 useless extension candidates. Maximal degree in co-relation 24518. Up to 2392 conditions per place. [2024-01-31 16:49:04,403 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 323 selfloop transitions, 59 changer transitions 2/385 dead transitions. [2024-01-31 16:49:04,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 385 transitions, 6546 flow [2024-01-31 16:49:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:49:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:49:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 142 transitions. [2024-01-31 16:49:04,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32494279176201374 [2024-01-31 16:49:04,404 INFO L175 Difference]: Start difference. First operand has 324 places, 335 transitions, 4897 flow. Second operand 19 states and 142 transitions. [2024-01-31 16:49:04,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 385 transitions, 6546 flow [2024-01-31 16:49:04,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 385 transitions, 6074 flow, removed 207 selfloop flow, removed 11 redundant places. [2024-01-31 16:49:04,737 INFO L231 Difference]: Finished difference. Result has 338 places, 353 transitions, 5117 flow [2024-01-31 16:49:04,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5117, PETRI_PLACES=338, PETRI_TRANSITIONS=353} [2024-01-31 16:49:04,738 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 315 predicate places. [2024-01-31 16:49:04,738 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 353 transitions, 5117 flow [2024-01-31 16:49:04,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.962962962962963) internal successors, (134), 27 states have internal predecessors, (134), 0 states have call successors, (0), 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 16:49:04,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:04,739 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:04,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-01-31 16:49:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-01-31 16:49:04,948 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:04,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 50058626, now seen corresponding path program 69 times [2024-01-31 16:49:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509710726] [2024-01-31 16:49:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:49:05,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509710726] [2024-01-31 16:49:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509710726] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555323259] [2024-01-31 16:49:05,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:05,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:05,714 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:05,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-01-31 16:49:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:49:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:06,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-31 16:49:06,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:06,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:06,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:49:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:49:06,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:06,464 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:49:06,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:49:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555323259] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:06,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 10] total 30 [2024-01-31 16:49:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279297993] [2024-01-31 16:49:06,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:49:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:49:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:49:06,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:06,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 353 transitions, 5117 flow. Second operand has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 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 16:49:06,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:06,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:06,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:07,712 INFO L124 PetriNetUnfolderBase]: 1435/2668 cut-off events. [2024-01-31 16:49:07,712 INFO L125 PetriNetUnfolderBase]: For 102529/102529 co-relation queries the response was YES. [2024-01-31 16:49:07,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25682 conditions, 2668 events. 1435/2668 cut-off events. For 102529/102529 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 16869 event pairs, 481 based on Foata normal form. 2/2668 useless extension candidates. Maximal degree in co-relation 25534. Up to 2359 conditions per place. [2024-01-31 16:49:07,749 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 319 selfloop transitions, 71 changer transitions 4/395 dead transitions. [2024-01-31 16:49:07,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 395 transitions, 6511 flow [2024-01-31 16:49:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:49:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:49:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 168 transitions. [2024-01-31 16:49:07,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31758034026465026 [2024-01-31 16:49:07,751 INFO L175 Difference]: Start difference. First operand has 338 places, 353 transitions, 5117 flow. Second operand 23 states and 168 transitions. [2024-01-31 16:49:07,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 395 transitions, 6511 flow [2024-01-31 16:49:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 395 transitions, 6224 flow, removed 116 selfloop flow, removed 10 redundant places. [2024-01-31 16:49:08,167 INFO L231 Difference]: Finished difference. Result has 353 places, 354 transitions, 5066 flow [2024-01-31 16:49:08,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5066, PETRI_PLACES=353, PETRI_TRANSITIONS=354} [2024-01-31 16:49:08,168 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 330 predicate places. [2024-01-31 16:49:08,168 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 354 transitions, 5066 flow [2024-01-31 16:49:08,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.9) internal successors, (147), 30 states have internal predecessors, (147), 0 states have call successors, (0), 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 16:49:08,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:08,169 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:08,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:08,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:08,382 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:08,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1918777734, now seen corresponding path program 70 times [2024-01-31 16:49:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:08,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334332915] [2024-01-31 16:49:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:08,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:49:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334332915] [2024-01-31 16:49:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334332915] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862298714] [2024-01-31 16:49:09,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:09,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:09,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:09,403 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:09,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-01-31 16:49:09,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:09,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:09,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:09,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:09,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:49:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:09,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:10,288 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:10,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:49:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:10,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862298714] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:10,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:10,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-01-31 16:49:10,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031064471] [2024-01-31 16:49:10,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:10,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 16:49:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 16:49:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 16:49:10,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:10,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 354 transitions, 5066 flow. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:49:10,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:10,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:10,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:12,204 INFO L124 PetriNetUnfolderBase]: 1438/2696 cut-off events. [2024-01-31 16:49:12,205 INFO L125 PetriNetUnfolderBase]: For 107434/107434 co-relation queries the response was YES. [2024-01-31 16:49:12,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25905 conditions, 2696 events. 1438/2696 cut-off events. For 107434/107434 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17256 event pairs, 505 based on Foata normal form. 3/2697 useless extension candidates. Maximal degree in co-relation 25753. Up to 2377 conditions per place. [2024-01-31 16:49:12,257 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 315 selfloop transitions, 75 changer transitions 3/394 dead transitions. [2024-01-31 16:49:12,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 394 transitions, 6450 flow [2024-01-31 16:49:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:49:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:49:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 172 transitions. [2024-01-31 16:49:12,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991304347826087 [2024-01-31 16:49:12,272 INFO L175 Difference]: Start difference. First operand has 353 places, 354 transitions, 5066 flow. Second operand 25 states and 172 transitions. [2024-01-31 16:49:12,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 394 transitions, 6450 flow [2024-01-31 16:49:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 394 transitions, 6283 flow, removed 34 selfloop flow, removed 20 redundant places. [2024-01-31 16:49:12,669 INFO L231 Difference]: Finished difference. Result has 361 places, 361 transitions, 5306 flow [2024-01-31 16:49:12,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5306, PETRI_PLACES=361, PETRI_TRANSITIONS=361} [2024-01-31 16:49:12,669 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 338 predicate places. [2024-01-31 16:49:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 361 transitions, 5306 flow [2024-01-31 16:49:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:49:12,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:12,670 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:12,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:12,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:12,882 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:12,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:12,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2079140696, now seen corresponding path program 71 times [2024-01-31 16:49:12,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:12,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064640239] [2024-01-31 16:49:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:12,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:49:13,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:13,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064640239] [2024-01-31 16:49:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064640239] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:13,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13010349] [2024-01-31 16:49:13,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:13,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:13,571 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:13,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-01-31 16:49:14,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:49:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:14,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:49:14,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:14,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:14,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-31 16:49:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:14,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:14,483 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:49:14,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:49:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:14,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13010349] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:14,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:14,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-01-31 16:49:14,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201783402] [2024-01-31 16:49:14,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:14,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:49:14,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:49:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:49:14,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:14,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 361 transitions, 5306 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:49:14,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:14,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:14,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:16,199 INFO L124 PetriNetUnfolderBase]: 1504/2823 cut-off events. [2024-01-31 16:49:16,199 INFO L125 PetriNetUnfolderBase]: For 122746/122746 co-relation queries the response was YES. [2024-01-31 16:49:16,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28122 conditions, 2823 events. 1504/2823 cut-off events. For 122746/122746 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 18217 event pairs, 427 based on Foata normal form. 4/2825 useless extension candidates. Maximal degree in co-relation 27967. Up to 2163 conditions per place. [2024-01-31 16:49:16,242 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 302 selfloop transitions, 120 changer transitions 7/430 dead transitions. [2024-01-31 16:49:16,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 430 transitions, 7444 flow [2024-01-31 16:49:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:49:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:49:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 202 transitions. [2024-01-31 16:49:16,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252818035426731 [2024-01-31 16:49:16,244 INFO L175 Difference]: Start difference. First operand has 361 places, 361 transitions, 5306 flow. Second operand 27 states and 202 transitions. [2024-01-31 16:49:16,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 430 transitions, 7444 flow [2024-01-31 16:49:16,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 430 transitions, 7203 flow, removed 75 selfloop flow, removed 18 redundant places. [2024-01-31 16:49:16,704 INFO L231 Difference]: Finished difference. Result has 375 places, 376 transitions, 5861 flow [2024-01-31 16:49:16,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5861, PETRI_PLACES=375, PETRI_TRANSITIONS=376} [2024-01-31 16:49:16,705 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 352 predicate places. [2024-01-31 16:49:16,705 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 376 transitions, 5861 flow [2024-01-31 16:49:16,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:49:16,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:16,717 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:16,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:16,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-01-31 16:49:16,930 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:16,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:16,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1300838970, now seen corresponding path program 72 times [2024-01-31 16:49:16,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:16,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353640882] [2024-01-31 16:49:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:16,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:18,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353640882] [2024-01-31 16:49:18,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353640882] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:18,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756778742] [2024-01-31 16:49:18,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:18,153 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:18,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-01-31 16:49:18,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:49:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:18,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:49:18,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:18,651 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:18,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:49:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:18,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:19,028 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:19,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-31 16:49:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756778742] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:19,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 37 [2024-01-31 16:49:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890985221] [2024-01-31 16:49:19,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-31 16:49:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-31 16:49:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2024-01-31 16:49:19,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:19,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 376 transitions, 5861 flow. Second operand has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 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 16:49:19,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:19,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:19,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:20,710 INFO L124 PetriNetUnfolderBase]: 1514/2846 cut-off events. [2024-01-31 16:49:20,710 INFO L125 PetriNetUnfolderBase]: For 136002/136002 co-relation queries the response was YES. [2024-01-31 16:49:20,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29407 conditions, 2846 events. 1514/2846 cut-off events. For 136002/136002 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18453 event pairs, 445 based on Foata normal form. 1/2845 useless extension candidates. Maximal degree in co-relation 29246. Up to 2327 conditions per place. [2024-01-31 16:49:20,752 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 296 selfloop transitions, 106 changer transitions 1/404 dead transitions. [2024-01-31 16:49:20,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 404 transitions, 7163 flow [2024-01-31 16:49:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:49:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:49:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 155 transitions. [2024-01-31 16:49:20,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26956521739130435 [2024-01-31 16:49:20,754 INFO L175 Difference]: Start difference. First operand has 375 places, 376 transitions, 5861 flow. Second operand 25 states and 155 transitions. [2024-01-31 16:49:20,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 404 transitions, 7163 flow [2024-01-31 16:49:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 404 transitions, 6793 flow, removed 133 selfloop flow, removed 18 redundant places. [2024-01-31 16:49:21,311 INFO L231 Difference]: Finished difference. Result has 385 places, 386 transitions, 6094 flow [2024-01-31 16:49:21,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6094, PETRI_PLACES=385, PETRI_TRANSITIONS=386} [2024-01-31 16:49:21,312 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 362 predicate places. [2024-01-31 16:49:21,312 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 386 transitions, 6094 flow [2024-01-31 16:49:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 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 16:49:21,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:21,312 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:21,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-01-31 16:49:21,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:21,513 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:21,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -804230342, now seen corresponding path program 73 times [2024-01-31 16:49:21,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:21,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93373540] [2024-01-31 16:49:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:21,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:21,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93373540] [2024-01-31 16:49:21,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93373540] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:21,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736673444] [2024-01-31 16:49:21,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:21,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:21,903 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:21,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-01-31 16:49:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:22,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:22,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:22,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:22,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:49:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:22,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:22,727 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:22,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:49:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:22,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736673444] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:22,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:22,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-31 16:49:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014539437] [2024-01-31 16:49:22,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:22,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:49:22,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:49:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:49:22,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:22,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 386 transitions, 6094 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:49:22,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:22,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:22,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:23,839 INFO L124 PetriNetUnfolderBase]: 1513/2850 cut-off events. [2024-01-31 16:49:23,839 INFO L125 PetriNetUnfolderBase]: For 141183/141183 co-relation queries the response was YES. [2024-01-31 16:49:23,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29547 conditions, 2850 events. 1513/2850 cut-off events. For 141183/141183 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18545 event pairs, 451 based on Foata normal form. 1/2849 useless extension candidates. Maximal degree in co-relation 29381. Up to 2313 conditions per place. [2024-01-31 16:49:23,882 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 317 selfloop transitions, 86 changer transitions 3/407 dead transitions. [2024-01-31 16:49:23,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 407 transitions, 7163 flow [2024-01-31 16:49:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:49:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:49:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-01-31 16:49:23,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32298136645962733 [2024-01-31 16:49:23,883 INFO L175 Difference]: Start difference. First operand has 385 places, 386 transitions, 6094 flow. Second operand 14 states and 104 transitions. [2024-01-31 16:49:23,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 407 transitions, 7163 flow [2024-01-31 16:49:24,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 407 transitions, 6703 flow, removed 159 selfloop flow, removed 20 redundant places. [2024-01-31 16:49:24,445 INFO L231 Difference]: Finished difference. Result has 381 places, 387 transitions, 5886 flow [2024-01-31 16:49:24,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5886, PETRI_PLACES=381, PETRI_TRANSITIONS=387} [2024-01-31 16:49:24,446 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 358 predicate places. [2024-01-31 16:49:24,446 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 387 transitions, 5886 flow [2024-01-31 16:49:24,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:49:24,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:24,446 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:24,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-01-31 16:49:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:24,659 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:24,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 718773882, now seen corresponding path program 74 times [2024-01-31 16:49:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935769938] [2024-01-31 16:49:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:25,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935769938] [2024-01-31 16:49:25,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935769938] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670758743] [2024-01-31 16:49:25,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:25,132 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:25,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-01-31 16:49:25,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:25,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:49:25,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:25,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:25,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:49:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:49:25,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:25,906 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:49:25,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:49:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670758743] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:25,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:25,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 26 [2024-01-31 16:49:25,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068975225] [2024-01-31 16:49:25,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:25,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:49:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:49:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:49:25,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:25,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 387 transitions, 5886 flow. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:49:25,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:25,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:25,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:27,186 INFO L124 PetriNetUnfolderBase]: 1520/2870 cut-off events. [2024-01-31 16:49:27,186 INFO L125 PetriNetUnfolderBase]: For 145667/145667 co-relation queries the response was YES. [2024-01-31 16:49:27,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29807 conditions, 2870 events. 1520/2870 cut-off events. For 145667/145667 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18768 event pairs, 433 based on Foata normal form. 2/2870 useless extension candidates. Maximal degree in co-relation 29641. Up to 2198 conditions per place. [2024-01-31 16:49:27,227 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 320 selfloop transitions, 111 changer transitions 5/437 dead transitions. [2024-01-31 16:49:27,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 437 transitions, 7431 flow [2024-01-31 16:49:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 172 transitions. [2024-01-31 16:49:27,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33992094861660077 [2024-01-31 16:49:27,228 INFO L175 Difference]: Start difference. First operand has 381 places, 387 transitions, 5886 flow. Second operand 22 states and 172 transitions. [2024-01-31 16:49:27,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 437 transitions, 7431 flow [2024-01-31 16:49:27,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 437 transitions, 7205 flow, removed 31 selfloop flow, removed 12 redundant places. [2024-01-31 16:49:27,746 INFO L231 Difference]: Finished difference. Result has 392 places, 389 transitions, 5991 flow [2024-01-31 16:49:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5670, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5991, PETRI_PLACES=392, PETRI_TRANSITIONS=389} [2024-01-31 16:49:27,747 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 369 predicate places. [2024-01-31 16:49:27,747 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 389 transitions, 5991 flow [2024-01-31 16:49:27,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 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 16:49:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:27,747 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:27,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-01-31 16:49:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:27,959 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:27,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1580793248, now seen corresponding path program 75 times [2024-01-31 16:49:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:27,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801681433] [2024-01-31 16:49:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:29,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:29,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801681433] [2024-01-31 16:49:29,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801681433] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:29,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326724366] [2024-01-31 16:49:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:29,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:29,112 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:29,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-01-31 16:49:29,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:49:29,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:29,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:49:29,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:29,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:29,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-31 16:49:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:29,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:29,961 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:29,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 113 [2024-01-31 16:49:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:30,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326724366] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:30,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:30,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 10] total 38 [2024-01-31 16:49:30,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870743218] [2024-01-31 16:49:30,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:30,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:49:30,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:30,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:49:30,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:49:30,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:30,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 389 transitions, 5991 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 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 16:49:30,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:30,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:30,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:31,854 INFO L124 PetriNetUnfolderBase]: 1538/2917 cut-off events. [2024-01-31 16:49:31,854 INFO L125 PetriNetUnfolderBase]: For 146548/146548 co-relation queries the response was YES. [2024-01-31 16:49:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30319 conditions, 2917 events. 1538/2917 cut-off events. For 146548/146548 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 19299 event pairs, 517 based on Foata normal form. 2/2917 useless extension candidates. Maximal degree in co-relation 30152. Up to 2590 conditions per place. [2024-01-31 16:49:31,899 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 358 selfloop transitions, 77 changer transitions 4/440 dead transitions. [2024-01-31 16:49:31,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 440 transitions, 7524 flow [2024-01-31 16:49:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:49:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:49:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 214 transitions. [2024-01-31 16:49:31,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30014025245441794 [2024-01-31 16:49:31,901 INFO L175 Difference]: Start difference. First operand has 392 places, 389 transitions, 5991 flow. Second operand 31 states and 214 transitions. [2024-01-31 16:49:31,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 440 transitions, 7524 flow [2024-01-31 16:49:32,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 440 transitions, 7311 flow, removed 30 selfloop flow, removed 17 redundant places. [2024-01-31 16:49:32,479 INFO L231 Difference]: Finished difference. Result has 408 places, 393 transitions, 6112 flow [2024-01-31 16:49:32,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5779, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6112, PETRI_PLACES=408, PETRI_TRANSITIONS=393} [2024-01-31 16:49:32,479 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 385 predicate places. [2024-01-31 16:49:32,479 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 393 transitions, 6112 flow [2024-01-31 16:49:32,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 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 16:49:32,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:32,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:32,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2024-01-31 16:49:32,692 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:32,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash -465705162, now seen corresponding path program 76 times [2024-01-31 16:49:32,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:32,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459584665] [2024-01-31 16:49:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:33,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:33,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459584665] [2024-01-31 16:49:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459584665] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390296555] [2024-01-31 16:49:33,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:33,234 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:33,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-01-31 16:49:33,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:33,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 16:49:33,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:33,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:33,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-01-31 16:49:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:33,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:33,985 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-01-31 16:49:33,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-01-31 16:49:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:34,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390296555] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:34,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:34,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-01-31 16:49:34,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148392697] [2024-01-31 16:49:34,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:34,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:49:34,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:49:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:49:34,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:34,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 393 transitions, 6112 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:49:34,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:34,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:34,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:35,550 INFO L124 PetriNetUnfolderBase]: 1602/3035 cut-off events. [2024-01-31 16:49:35,550 INFO L125 PetriNetUnfolderBase]: For 158363/158363 co-relation queries the response was YES. [2024-01-31 16:49:35,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32361 conditions, 3035 events. 1602/3035 cut-off events. For 158363/158363 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20138 event pairs, 535 based on Foata normal form. 3/3036 useless extension candidates. Maximal degree in co-relation 32189. Up to 2727 conditions per place. [2024-01-31 16:49:35,597 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 394 selfloop transitions, 50 changer transitions 6/451 dead transitions. [2024-01-31 16:49:35,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 451 transitions, 8163 flow [2024-01-31 16:49:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:49:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:49:35,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 155 transitions. [2024-01-31 16:49:35,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35469107551487417 [2024-01-31 16:49:35,598 INFO L175 Difference]: Start difference. First operand has 408 places, 393 transitions, 6112 flow. Second operand 19 states and 155 transitions. [2024-01-31 16:49:35,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 451 transitions, 8163 flow [2024-01-31 16:49:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 451 transitions, 7969 flow, removed 46 selfloop flow, removed 25 redundant places. [2024-01-31 16:49:36,278 INFO L231 Difference]: Finished difference. Result has 406 places, 403 transitions, 6455 flow [2024-01-31 16:49:36,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5918, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6455, PETRI_PLACES=406, PETRI_TRANSITIONS=403} [2024-01-31 16:49:36,279 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 383 predicate places. [2024-01-31 16:49:36,279 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 403 transitions, 6455 flow [2024-01-31 16:49:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:49:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:36,280 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:36,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:36,492 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1003560740, now seen corresponding path program 77 times [2024-01-31 16:49:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117608633] [2024-01-31 16:49:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:49:37,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117608633] [2024-01-31 16:49:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117608633] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271762131] [2024-01-31 16:49:37,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:49:37,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:37,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:37,186 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-01-31 16:49:37,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:49:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:37,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:49:37,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:37,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:37,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-01-31 16:49:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:37,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:38,175 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-01-31 16:49:38,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-01-31 16:49:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271762131] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:38,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:38,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 35 [2024-01-31 16:49:38,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72965796] [2024-01-31 16:49:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:38,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:49:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:49:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:49:38,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:38,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 403 transitions, 6455 flow. Second operand has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:49:38,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:38,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:39,944 INFO L124 PetriNetUnfolderBase]: 1608/3048 cut-off events. [2024-01-31 16:49:39,944 INFO L125 PetriNetUnfolderBase]: For 167540/167540 co-relation queries the response was YES. [2024-01-31 16:49:39,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32956 conditions, 3048 events. 1608/3048 cut-off events. For 167540/167540 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20202 event pairs, 547 based on Foata normal form. 2/3048 useless extension candidates. Maximal degree in co-relation 32781. Up to 2676 conditions per place. [2024-01-31 16:49:39,991 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 365 selfloop transitions, 76 changer transitions 6/448 dead transitions. [2024-01-31 16:49:39,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 448 transitions, 7950 flow [2024-01-31 16:49:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:49:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:49:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 182 transitions. [2024-01-31 16:49:39,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165217391304348 [2024-01-31 16:49:39,993 INFO L175 Difference]: Start difference. First operand has 406 places, 403 transitions, 6455 flow. Second operand 25 states and 182 transitions. [2024-01-31 16:49:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 448 transitions, 7950 flow [2024-01-31 16:49:40,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 448 transitions, 7667 flow, removed 115 selfloop flow, removed 11 redundant places. [2024-01-31 16:49:40,702 INFO L231 Difference]: Finished difference. Result has 422 places, 404 transitions, 6445 flow [2024-01-31 16:49:40,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6445, PETRI_PLACES=422, PETRI_TRANSITIONS=404} [2024-01-31 16:49:40,703 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 399 predicate places. [2024-01-31 16:49:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 404 transitions, 6445 flow [2024-01-31 16:49:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.857142857142857) internal successors, (170), 35 states have internal predecessors, (170), 0 states have call successors, (0), 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 16:49:40,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:40,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:40,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:40,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:40,917 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:40,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1173899565, now seen corresponding path program 78 times [2024-01-31 16:49:40,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:40,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907174425] [2024-01-31 16:49:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:40,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:41,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907174425] [2024-01-31 16:49:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907174425] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591565276] [2024-01-31 16:49:41,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:49:41,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:41,406 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:41,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-01-31 16:49:41,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:49:41,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:41,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:49:41,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:42,073 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:49:42,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:49:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:42,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:42,228 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:49:42,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:49:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:42,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591565276] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:42,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:42,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2024-01-31 16:49:42,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791991338] [2024-01-31 16:49:42,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:42,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:49:42,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:42,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:49:42,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:49:42,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:42,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 404 transitions, 6445 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:49:42,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:42,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:43,513 INFO L124 PetriNetUnfolderBase]: 1836/3450 cut-off events. [2024-01-31 16:49:43,514 INFO L125 PetriNetUnfolderBase]: For 199865/199865 co-relation queries the response was YES. [2024-01-31 16:49:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38565 conditions, 3450 events. 1836/3450 cut-off events. For 199865/199865 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23253 event pairs, 304 based on Foata normal form. 12/3460 useless extension candidates. Maximal degree in co-relation 38386. Up to 1441 conditions per place. [2024-01-31 16:49:43,570 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 337 selfloop transitions, 169 changer transitions 0/507 dead transitions. [2024-01-31 16:49:43,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 507 transitions, 9621 flow [2024-01-31 16:49:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:49:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:49:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 150 transitions. [2024-01-31 16:49:43,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076086956521739 [2024-01-31 16:49:43,572 INFO L175 Difference]: Start difference. First operand has 422 places, 404 transitions, 6445 flow. Second operand 16 states and 150 transitions. [2024-01-31 16:49:43,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 507 transitions, 9621 flow [2024-01-31 16:49:44,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 507 transitions, 9408 flow, removed 51 selfloop flow, removed 24 redundant places. [2024-01-31 16:49:44,377 INFO L231 Difference]: Finished difference. Result has 420 places, 422 transitions, 7196 flow [2024-01-31 16:49:44,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6251, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7196, PETRI_PLACES=420, PETRI_TRANSITIONS=422} [2024-01-31 16:49:44,378 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 397 predicate places. [2024-01-31 16:49:44,378 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 422 transitions, 7196 flow [2024-01-31 16:49:44,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:49:44,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:44,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:44,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:44,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-01-31 16:49:44,579 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:44,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -622920456, now seen corresponding path program 79 times [2024-01-31 16:49:44,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:44,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677174431] [2024-01-31 16:49:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:45,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677174431] [2024-01-31 16:49:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677174431] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456589215] [2024-01-31 16:49:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:49:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:45,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:45,867 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:45,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-01-31 16:49:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:46,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:49:46,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:46,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:46,511 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-31 16:49:46,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-31 16:49:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456589215] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:46,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:46,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-01-31 16:49:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638617601] [2024-01-31 16:49:46,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:49:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:49:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:49:46,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:46,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 422 transitions, 7196 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:49:46,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:46,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:48,364 INFO L124 PetriNetUnfolderBase]: 1844/3475 cut-off events. [2024-01-31 16:49:48,364 INFO L125 PetriNetUnfolderBase]: For 214902/214902 co-relation queries the response was YES. [2024-01-31 16:49:48,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40111 conditions, 3475 events. 1844/3475 cut-off events. For 214902/214902 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23734 event pairs, 515 based on Foata normal form. 4/3479 useless extension candidates. Maximal degree in co-relation 39929. Up to 1900 conditions per place. [2024-01-31 16:49:48,427 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 311 selfloop transitions, 163 changer transitions 24/499 dead transitions. [2024-01-31 16:49:48,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 499 transitions, 9437 flow [2024-01-31 16:49:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:49:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:49:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 150 transitions. [2024-01-31 16:49:48,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2964426877470356 [2024-01-31 16:49:48,428 INFO L175 Difference]: Start difference. First operand has 420 places, 422 transitions, 7196 flow. Second operand 22 states and 150 transitions. [2024-01-31 16:49:48,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 499 transitions, 9437 flow [2024-01-31 16:49:49,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 499 transitions, 9086 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-01-31 16:49:49,445 INFO L231 Difference]: Finished difference. Result has 438 places, 426 transitions, 7410 flow [2024-01-31 16:49:49,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7410, PETRI_PLACES=438, PETRI_TRANSITIONS=426} [2024-01-31 16:49:49,446 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 415 predicate places. [2024-01-31 16:49:49,446 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 426 transitions, 7410 flow [2024-01-31 16:49:49,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:49:49,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:49,447 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:49,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:49,660 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:49,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 878108259, now seen corresponding path program 80 times [2024-01-31 16:49:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744297128] [2024-01-31 16:49:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:50,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:50,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744297128] [2024-01-31 16:49:50,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744297128] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:50,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540523285] [2024-01-31 16:49:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:49:50,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:50,179 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:50,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-01-31 16:49:50,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:49:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:50,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:49:50,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:49:50,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:50,840 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:49:50,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:49:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540523285] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:50,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:49:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185673382] [2024-01-31 16:49:50,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:50,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:49:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:49:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:49:50,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:50,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 426 transitions, 7410 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:49:50,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:50,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:50,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:52,121 INFO L124 PetriNetUnfolderBase]: 1856/3488 cut-off events. [2024-01-31 16:49:52,121 INFO L125 PetriNetUnfolderBase]: For 221004/221004 co-relation queries the response was YES. [2024-01-31 16:49:52,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41092 conditions, 3488 events. 1856/3488 cut-off events. For 221004/221004 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23624 event pairs, 332 based on Foata normal form. 12/3500 useless extension candidates. Maximal degree in co-relation 40904. Up to 1748 conditions per place. [2024-01-31 16:49:52,279 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 336 selfloop transitions, 144 changer transitions 0/481 dead transitions. [2024-01-31 16:49:52,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 481 transitions, 9455 flow [2024-01-31 16:49:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:49:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:49:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-01-31 16:49:52,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36141304347826086 [2024-01-31 16:49:52,281 INFO L175 Difference]: Start difference. First operand has 438 places, 426 transitions, 7410 flow. Second operand 16 states and 133 transitions. [2024-01-31 16:49:52,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 481 transitions, 9455 flow [2024-01-31 16:49:53,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 481 transitions, 9055 flow, removed 106 selfloop flow, removed 19 redundant places. [2024-01-31 16:49:53,289 INFO L231 Difference]: Finished difference. Result has 432 places, 428 transitions, 7451 flow [2024-01-31 16:49:53,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7451, PETRI_PLACES=432, PETRI_TRANSITIONS=428} [2024-01-31 16:49:53,290 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 409 predicate places. [2024-01-31 16:49:53,290 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 428 transitions, 7451 flow [2024-01-31 16:49:53,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:49:53,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:53,290 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:53,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:53,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:53,503 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:53,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 998523606, now seen corresponding path program 81 times [2024-01-31 16:49:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779510630] [2024-01-31 16:49:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:53,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:53,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779510630] [2024-01-31 16:49:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779510630] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440472478] [2024-01-31 16:49:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:49:53,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:53,986 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:53,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-01-31 16:49:54,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:49:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:54,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:49:54,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:54,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:54,727 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-31 16:49:54,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-31 16:49:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:54,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440472478] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:54,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:54,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-31 16:49:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021746602] [2024-01-31 16:49:54,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:54,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:49:54,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:49:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:49:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:54,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 428 transitions, 7451 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:49:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:49:56,101 INFO L124 PetriNetUnfolderBase]: 1861/3506 cut-off events. [2024-01-31 16:49:56,101 INFO L125 PetriNetUnfolderBase]: For 200402/200402 co-relation queries the response was YES. [2024-01-31 16:49:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39966 conditions, 3506 events. 1861/3506 cut-off events. For 200402/200402 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23888 event pairs, 612 based on Foata normal form. 4/3510 useless extension candidates. Maximal degree in co-relation 39782. Up to 1942 conditions per place. [2024-01-31 16:49:56,160 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 330 selfloop transitions, 125 changer transitions 10/466 dead transitions. [2024-01-31 16:49:56,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 466 transitions, 8904 flow [2024-01-31 16:49:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:49:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:49:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2024-01-31 16:49:56,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952569169960474 [2024-01-31 16:49:56,161 INFO L175 Difference]: Start difference. First operand has 432 places, 428 transitions, 7451 flow. Second operand 11 states and 100 transitions. [2024-01-31 16:49:56,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 466 transitions, 8904 flow [2024-01-31 16:49:57,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 466 transitions, 8638 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-01-31 16:49:57,147 INFO L231 Difference]: Finished difference. Result has 431 places, 428 transitions, 7442 flow [2024-01-31 16:49:57,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7442, PETRI_PLACES=431, PETRI_TRANSITIONS=428} [2024-01-31 16:49:57,148 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 408 predicate places. [2024-01-31 16:49:57,148 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 428 transitions, 7442 flow [2024-01-31 16:49:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:49:57,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:49:57,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:49:57,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-01-31 16:49:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-01-31 16:49:57,360 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:49:57,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:49:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash 209093633, now seen corresponding path program 82 times [2024-01-31 16:49:57,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:49:57,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131206691] [2024-01-31 16:49:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:49:57,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:49:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:49:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:49:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:49:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131206691] [2024-01-31 16:49:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131206691] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:49:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700422153] [2024-01-31 16:49:58,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:49:58,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:49:58,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:49:58,404 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:49:58,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-01-31 16:49:58,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:49:58,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:49:58,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:49:58,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:49:58,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:49:58,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:49:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:58,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:49:59,099 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:49:59,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:49:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:49:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700422153] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:49:59,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:49:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-01-31 16:49:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300757330] [2024-01-31 16:49:59,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:49:59,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:49:59,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:49:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:49:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:49:59,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:49:59,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 428 transitions, 7442 flow. Second operand has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 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 16:49:59,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:49:59,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:49:59,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:00,998 INFO L124 PetriNetUnfolderBase]: 1930/3640 cut-off events. [2024-01-31 16:50:00,999 INFO L125 PetriNetUnfolderBase]: For 216681/216681 co-relation queries the response was YES. [2024-01-31 16:50:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42351 conditions, 3640 events. 1930/3640 cut-off events. For 216681/216681 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24985 event pairs, 304 based on Foata normal form. 12/3652 useless extension candidates. Maximal degree in co-relation 42166. Up to 1686 conditions per place. [2024-01-31 16:50:01,057 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 340 selfloop transitions, 173 changer transitions 4/518 dead transitions. [2024-01-31 16:50:01,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 518 transitions, 10373 flow [2024-01-31 16:50:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:50:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:50:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 200 transitions. [2024-01-31 16:50:01,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2024-01-31 16:50:01,059 INFO L175 Difference]: Start difference. First operand has 431 places, 428 transitions, 7442 flow. Second operand 25 states and 200 transitions. [2024-01-31 16:50:01,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 518 transitions, 10373 flow [2024-01-31 16:50:02,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 518 transitions, 10117 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:50:02,079 INFO L231 Difference]: Finished difference. Result has 447 places, 438 transitions, 7989 flow [2024-01-31 16:50:02,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7989, PETRI_PLACES=447, PETRI_TRANSITIONS=438} [2024-01-31 16:50:02,080 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 424 predicate places. [2024-01-31 16:50:02,080 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 438 transitions, 7989 flow [2024-01-31 16:50:02,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.606060606060606) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 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 16:50:02,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:02,080 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:02,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-01-31 16:50:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:02,293 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:02,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1209759668, now seen corresponding path program 83 times [2024-01-31 16:50:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:02,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011074238] [2024-01-31 16:50:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:02,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:50:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011074238] [2024-01-31 16:50:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011074238] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500985066] [2024-01-31 16:50:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:50:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:03,330 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:03,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-01-31 16:50:03,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:50:03,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:03,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-31 16:50:03,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:03,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:03,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-31 16:50:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:50:04,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:04,185 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-31 16:50:04,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-31 16:50:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:04,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500985066] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:04,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:04,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 38 [2024-01-31 16:50:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608359701] [2024-01-31 16:50:04,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:50:04,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:50:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:50:04,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:04,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 438 transitions, 7989 flow. Second operand has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:04,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:04,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:04,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:05,920 INFO L124 PetriNetUnfolderBase]: 1942/3667 cut-off events. [2024-01-31 16:50:05,920 INFO L125 PetriNetUnfolderBase]: For 241943/241943 co-relation queries the response was YES. [2024-01-31 16:50:05,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43994 conditions, 3667 events. 1942/3667 cut-off events. For 241943/241943 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25244 event pairs, 662 based on Foata normal form. 4/3671 useless extension candidates. Maximal degree in co-relation 43806. Up to 2096 conditions per place. [2024-01-31 16:50:05,978 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 333 selfloop transitions, 144 changer transitions 1/479 dead transitions. [2024-01-31 16:50:05,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 479 transitions, 9700 flow [2024-01-31 16:50:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:50:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:50:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2024-01-31 16:50:05,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35597826086956524 [2024-01-31 16:50:05,979 INFO L175 Difference]: Start difference. First operand has 447 places, 438 transitions, 7989 flow. Second operand 16 states and 131 transitions. [2024-01-31 16:50:05,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 479 transitions, 9700 flow [2024-01-31 16:50:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 479 transitions, 9160 flow, removed 111 selfloop flow, removed 20 redundant places. [2024-01-31 16:50:07,245 INFO L231 Difference]: Finished difference. Result has 443 places, 439 transitions, 7791 flow [2024-01-31 16:50:07,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7451, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7791, PETRI_PLACES=443, PETRI_TRANSITIONS=439} [2024-01-31 16:50:07,245 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 420 predicate places. [2024-01-31 16:50:07,246 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 439 transitions, 7791 flow [2024-01-31 16:50:07,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:50:07,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:07,246 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:07,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:07,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:07,459 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:07,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash -314789493, now seen corresponding path program 84 times [2024-01-31 16:50:07,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:07,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036604642] [2024-01-31 16:50:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:07,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:50:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036604642] [2024-01-31 16:50:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036604642] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421970482] [2024-01-31 16:50:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:50:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:08,268 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-01-31 16:50:08,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:50:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:08,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 16:50:08,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:08,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:08,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:50:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:08,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:09,029 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:50:09,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:50:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421970482] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:09,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 30 [2024-01-31 16:50:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587316899] [2024-01-31 16:50:09,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:09,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:50:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:50:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:50:09,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:09,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 439 transitions, 7791 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 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 16:50:09,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:09,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:10,554 INFO L124 PetriNetUnfolderBase]: 1932/3639 cut-off events. [2024-01-31 16:50:10,554 INFO L125 PetriNetUnfolderBase]: For 225498/225498 co-relation queries the response was YES. [2024-01-31 16:50:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42661 conditions, 3639 events. 1932/3639 cut-off events. For 225498/225498 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24956 event pairs, 324 based on Foata normal form. 6/3645 useless extension candidates. Maximal degree in co-relation 42472. Up to 1690 conditions per place. [2024-01-31 16:50:10,718 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 330 selfloop transitions, 167 changer transitions 6/504 dead transitions. [2024-01-31 16:50:10,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 504 transitions, 9966 flow [2024-01-31 16:50:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:50:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:50:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 180 transitions. [2024-01-31 16:50:10,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34026465028355385 [2024-01-31 16:50:10,720 INFO L175 Difference]: Start difference. First operand has 443 places, 439 transitions, 7791 flow. Second operand 23 states and 180 transitions. [2024-01-31 16:50:10,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 504 transitions, 9966 flow [2024-01-31 16:50:11,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 504 transitions, 9660 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-01-31 16:50:11,782 INFO L231 Difference]: Finished difference. Result has 450 places, 435 transitions, 7742 flow [2024-01-31 16:50:11,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7416, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7742, PETRI_PLACES=450, PETRI_TRANSITIONS=435} [2024-01-31 16:50:11,783 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 427 predicate places. [2024-01-31 16:50:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 435 transitions, 7742 flow [2024-01-31 16:50:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 0 states have call successors, (0), 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 16:50:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:11,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-01-31 16:50:11,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:11,996 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:11,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:11,997 INFO L85 PathProgramCache]: Analyzing trace with hash 958274704, now seen corresponding path program 85 times [2024-01-31 16:50:11,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:11,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548927457] [2024-01-31 16:50:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:11,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:50:12,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:12,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548927457] [2024-01-31 16:50:12,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548927457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:12,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378882506] [2024-01-31 16:50:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:50:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:12,847 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-01-31 16:50:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:13,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:50:13,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:13,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:13,559 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-31 16:50:13,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-31 16:50:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378882506] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:13,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-31 16:50:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071375185] [2024-01-31 16:50:13,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:13,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:50:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:50:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:50:13,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:13,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 435 transitions, 7742 flow. Second operand has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:50:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:15,093 INFO L124 PetriNetUnfolderBase]: 1925/3629 cut-off events. [2024-01-31 16:50:15,094 INFO L125 PetriNetUnfolderBase]: For 227038/227038 co-relation queries the response was YES. [2024-01-31 16:50:15,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42719 conditions, 3629 events. 1925/3629 cut-off events. For 227038/227038 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24888 event pairs, 654 based on Foata normal form. 4/3633 useless extension candidates. Maximal degree in co-relation 42530. Up to 2070 conditions per place. [2024-01-31 16:50:15,150 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 315 selfloop transitions, 141 changer transitions 12/469 dead transitions. [2024-01-31 16:50:15,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 469 transitions, 9179 flow [2024-01-31 16:50:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:50:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:50:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2024-01-31 16:50:15,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233695652173913 [2024-01-31 16:50:15,151 INFO L175 Difference]: Start difference. First operand has 450 places, 435 transitions, 7742 flow. Second operand 16 states and 119 transitions. [2024-01-31 16:50:15,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 469 transitions, 9179 flow [2024-01-31 16:50:16,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 469 transitions, 8838 flow, removed 2 selfloop flow, removed 21 redundant places. [2024-01-31 16:50:16,261 INFO L231 Difference]: Finished difference. Result has 445 places, 435 transitions, 7698 flow [2024-01-31 16:50:16,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7698, PETRI_PLACES=445, PETRI_TRANSITIONS=435} [2024-01-31 16:50:16,261 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2024-01-31 16:50:16,261 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 435 transitions, 7698 flow [2024-01-31 16:50:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.689655172413793) internal successors, (136), 29 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:50:16,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:16,262 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:16,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-01-31 16:50:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2024-01-31 16:50:16,474 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:16,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash -837269857, now seen corresponding path program 86 times [2024-01-31 16:50:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:16,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634796092] [2024-01-31 16:50:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:50:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:17,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634796092] [2024-01-31 16:50:17,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634796092] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:17,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683504035] [2024-01-31 16:50:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:50:17,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:17,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:17,493 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:17,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-01-31 16:50:17,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:50:17,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:17,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:50:17,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:50:18,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:18,293 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:50:18,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:50:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:18,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683504035] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:18,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:18,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 35 [2024-01-31 16:50:18,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677430200] [2024-01-31 16:50:18,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:50:18,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:50:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:50:18,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:18,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 435 transitions, 7698 flow. Second operand has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:50:18,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:18,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:18,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:20,021 INFO L124 PetriNetUnfolderBase]: 1962/3678 cut-off events. [2024-01-31 16:50:20,021 INFO L125 PetriNetUnfolderBase]: For 224340/224340 co-relation queries the response was YES. [2024-01-31 16:50:20,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43230 conditions, 3678 events. 1962/3678 cut-off events. For 224340/224340 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25138 event pairs, 326 based on Foata normal form. 12/3690 useless extension candidates. Maximal degree in co-relation 43039. Up to 1844 conditions per place. [2024-01-31 16:50:20,080 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 323 selfloop transitions, 170 changer transitions 0/494 dead transitions. [2024-01-31 16:50:20,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 494 transitions, 9771 flow [2024-01-31 16:50:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:50:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:50:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 182 transitions. [2024-01-31 16:50:20,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29307568438003223 [2024-01-31 16:50:20,081 INFO L175 Difference]: Start difference. First operand has 445 places, 435 transitions, 7698 flow. Second operand 27 states and 182 transitions. [2024-01-31 16:50:20,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 494 transitions, 9771 flow [2024-01-31 16:50:21,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 494 transitions, 9479 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-01-31 16:50:21,202 INFO L231 Difference]: Finished difference. Result has 453 places, 443 transitions, 7953 flow [2024-01-31 16:50:21,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7953, PETRI_PLACES=453, PETRI_TRANSITIONS=443} [2024-01-31 16:50:21,203 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 430 predicate places. [2024-01-31 16:50:21,203 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 443 transitions, 7953 flow [2024-01-31 16:50:21,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:50:21,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:21,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:21,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:21,415 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:21,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1651055974, now seen corresponding path program 87 times [2024-01-31 16:50:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:21,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836514064] [2024-01-31 16:50:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:21,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836514064] [2024-01-31 16:50:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836514064] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771076452] [2024-01-31 16:50:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:50:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:21,940 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:21,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-01-31 16:50:22,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:50:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:22,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:50:22,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:22,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:22,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:50:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:22,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:22,650 INFO L349 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2024-01-31 16:50:22,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 71 [2024-01-31 16:50:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771076452] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:22,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:22,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-01-31 16:50:22,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792896629] [2024-01-31 16:50:22,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:22,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:50:22,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:50:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:50:22,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:22,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 443 transitions, 7953 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:50:22,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:22,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:22,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:24,101 INFO L124 PetriNetUnfolderBase]: 1952/3657 cut-off events. [2024-01-31 16:50:24,101 INFO L125 PetriNetUnfolderBase]: For 225083/225083 co-relation queries the response was YES. [2024-01-31 16:50:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43205 conditions, 3657 events. 1952/3657 cut-off events. For 225083/225083 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25000 event pairs, 668 based on Foata normal form. 4/3661 useless extension candidates. Maximal degree in co-relation 43014. Up to 2140 conditions per place. [2024-01-31 16:50:24,157 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 343 selfloop transitions, 126 changer transitions 4/474 dead transitions. [2024-01-31 16:50:24,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 474 transitions, 9445 flow [2024-01-31 16:50:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:50:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:50:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2024-01-31 16:50:24,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-01-31 16:50:24,159 INFO L175 Difference]: Start difference. First operand has 453 places, 443 transitions, 7953 flow. Second operand 12 states and 99 transitions. [2024-01-31 16:50:24,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 474 transitions, 9445 flow [2024-01-31 16:50:25,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 474 transitions, 9111 flow, removed 3 selfloop flow, removed 25 redundant places. [2024-01-31 16:50:25,326 INFO L231 Difference]: Finished difference. Result has 440 places, 443 transitions, 7876 flow [2024-01-31 16:50:25,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7619, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7876, PETRI_PLACES=440, PETRI_TRANSITIONS=443} [2024-01-31 16:50:25,340 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 417 predicate places. [2024-01-31 16:50:25,340 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 443 transitions, 7876 flow [2024-01-31 16:50:25,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:50:25,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:25,341 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:25,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:25,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:25,554 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:25,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:25,555 INFO L85 PathProgramCache]: Analyzing trace with hash 340910853, now seen corresponding path program 88 times [2024-01-31 16:50:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277425433] [2024-01-31 16:50:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:50:26,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:26,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277425433] [2024-01-31 16:50:26,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277425433] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:26,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936737821] [2024-01-31 16:50:26,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:26,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:26,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:26,308 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:26,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-01-31 16:50:26,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:26,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:26,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:50:26,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:26,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:26,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:50:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:26,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:26,994 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:50:26,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:50:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:27,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936737821] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:27,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:27,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-31 16:50:27,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596907435] [2024-01-31 16:50:27,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:27,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:50:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:50:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:50:27,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:27,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 443 transitions, 7876 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:50:27,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:27,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:28,647 INFO L124 PetriNetUnfolderBase]: 1981/3727 cut-off events. [2024-01-31 16:50:28,647 INFO L125 PetriNetUnfolderBase]: For 240188/240188 co-relation queries the response was YES. [2024-01-31 16:50:28,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44338 conditions, 3727 events. 1981/3727 cut-off events. For 240188/240188 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25637 event pairs, 795 based on Foata normal form. 18/3745 useless extension candidates. Maximal degree in co-relation 44148. Up to 3073 conditions per place. [2024-01-31 16:50:28,717 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 377 selfloop transitions, 126 changer transitions 4/508 dead transitions. [2024-01-31 16:50:28,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 508 transitions, 10173 flow [2024-01-31 16:50:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:50:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:50:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 200 transitions. [2024-01-31 16:50:28,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33444816053511706 [2024-01-31 16:50:28,719 INFO L175 Difference]: Start difference. First operand has 440 places, 443 transitions, 7876 flow. Second operand 26 states and 200 transitions. [2024-01-31 16:50:28,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 508 transitions, 10173 flow [2024-01-31 16:50:30,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 508 transitions, 9919 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-01-31 16:50:30,095 INFO L231 Difference]: Finished difference. Result has 458 places, 449 transitions, 8122 flow [2024-01-31 16:50:30,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7622, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8122, PETRI_PLACES=458, PETRI_TRANSITIONS=449} [2024-01-31 16:50:30,096 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 435 predicate places. [2024-01-31 16:50:30,096 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 449 transitions, 8122 flow [2024-01-31 16:50:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:50:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:30,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:30,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:30,309 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:30,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:30,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1683367486, now seen corresponding path program 89 times [2024-01-31 16:50:30,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:30,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940499146] [2024-01-31 16:50:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:30,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940499146] [2024-01-31 16:50:30,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940499146] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:30,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413460179] [2024-01-31 16:50:30,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:50:30,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:30,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:30,873 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:30,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-01-31 16:50:31,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:50:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:31,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:50:31,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:31,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:31,672 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:50:31,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:50:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:31,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413460179] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:31,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:31,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:50:31,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192472766] [2024-01-31 16:50:31,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:31,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:50:31,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:50:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:50:31,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:31,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 449 transitions, 8122 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 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 16:50:31,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:31,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:33,259 INFO L124 PetriNetUnfolderBase]: 1977/3723 cut-off events. [2024-01-31 16:50:33,259 INFO L125 PetriNetUnfolderBase]: For 255449/255449 co-relation queries the response was YES. [2024-01-31 16:50:33,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45205 conditions, 3723 events. 1977/3723 cut-off events. For 255449/255449 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25588 event pairs, 857 based on Foata normal form. 4/3727 useless extension candidates. Maximal degree in co-relation 45010. Up to 3288 conditions per place. [2024-01-31 16:50:33,327 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 384 selfloop transitions, 74 changer transitions 14/473 dead transitions. [2024-01-31 16:50:33,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 473 transitions, 9385 flow [2024-01-31 16:50:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:50:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:50:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2024-01-31 16:50:33,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3438735177865613 [2024-01-31 16:50:33,328 INFO L175 Difference]: Start difference. First operand has 458 places, 449 transitions, 8122 flow. Second operand 11 states and 87 transitions. [2024-01-31 16:50:33,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 473 transitions, 9385 flow [2024-01-31 16:50:34,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 473 transitions, 9071 flow, removed 45 selfloop flow, removed 20 redundant places. [2024-01-31 16:50:34,638 INFO L231 Difference]: Finished difference. Result has 451 places, 449 transitions, 7965 flow [2024-01-31 16:50:34,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7808, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7965, PETRI_PLACES=451, PETRI_TRANSITIONS=449} [2024-01-31 16:50:34,639 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 428 predicate places. [2024-01-31 16:50:34,639 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 449 transitions, 7965 flow [2024-01-31 16:50:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 0 states have call successors, (0), 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 16:50:34,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:34,639 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:34,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:34,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:34,852 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:34,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1140460296, now seen corresponding path program 90 times [2024-01-31 16:50:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:34,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23307467] [2024-01-31 16:50:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:34,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23307467] [2024-01-31 16:50:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23307467] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:35,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57001429] [2024-01-31 16:50:35,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:50:35,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:35,364 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-01-31 16:50:35,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:50:35,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:35,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:50:35,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:36,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:36,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:50:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:36,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:36,171 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:50:36,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:50:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:36,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57001429] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:36,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:36,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-01-31 16:50:36,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137355721] [2024-01-31 16:50:36,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:36,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:50:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:36,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:50:36,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:50:36,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:36,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 449 transitions, 7965 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 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 16:50:36,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:36,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:36,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:37,682 INFO L124 PetriNetUnfolderBase]: 1979/3723 cut-off events. [2024-01-31 16:50:37,682 INFO L125 PetriNetUnfolderBase]: For 256263/256263 co-relation queries the response was YES. [2024-01-31 16:50:37,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45014 conditions, 3723 events. 1979/3723 cut-off events. For 256263/256263 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25549 event pairs, 838 based on Foata normal form. 4/3727 useless extension candidates. Maximal degree in co-relation 44817. Up to 3238 conditions per place. [2024-01-31 16:50:37,751 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 391 selfloop transitions, 82 changer transitions 1/475 dead transitions. [2024-01-31 16:50:37,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 475 transitions, 9376 flow [2024-01-31 16:50:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:50:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:50:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-01-31 16:50:37,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37549407114624506 [2024-01-31 16:50:37,752 INFO L175 Difference]: Start difference. First operand has 451 places, 449 transitions, 7965 flow. Second operand 11 states and 95 transitions. [2024-01-31 16:50:37,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 475 transitions, 9376 flow [2024-01-31 16:50:39,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 475 transitions, 9220 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:50:39,284 INFO L231 Difference]: Finished difference. Result has 450 places, 450 transitions, 8031 flow [2024-01-31 16:50:39,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7811, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8031, PETRI_PLACES=450, PETRI_TRANSITIONS=450} [2024-01-31 16:50:39,285 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 427 predicate places. [2024-01-31 16:50:39,285 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 450 transitions, 8031 flow [2024-01-31 16:50:39,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 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 16:50:39,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:39,285 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:39,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-01-31 16:50:39,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2024-01-31 16:50:39,498 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:39,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1671372062, now seen corresponding path program 91 times [2024-01-31 16:50:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:39,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364157145] [2024-01-31 16:50:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:39,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:50:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364157145] [2024-01-31 16:50:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364157145] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267615105] [2024-01-31 16:50:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:50:40,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:40,259 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:40,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-01-31 16:50:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:40,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:50:40,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:40,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:40,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 45 [2024-01-31 16:50:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:40,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:41,015 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:50:41,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:50:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:41,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267615105] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:41,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:41,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-01-31 16:50:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907428853] [2024-01-31 16:50:41,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:41,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:50:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:50:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:50:41,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:41,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 450 transitions, 8031 flow. Second operand has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:50:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:43,246 INFO L124 PetriNetUnfolderBase]: 2019/3828 cut-off events. [2024-01-31 16:50:43,246 INFO L125 PetriNetUnfolderBase]: For 276555/276555 co-relation queries the response was YES. [2024-01-31 16:50:43,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46849 conditions, 3828 events. 2019/3828 cut-off events. For 276555/276555 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26580 event pairs, 796 based on Foata normal form. 16/3844 useless extension candidates. Maximal degree in co-relation 46653. Up to 3083 conditions per place. [2024-01-31 16:50:43,319 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 401 selfloop transitions, 123 changer transitions 2/527 dead transitions. [2024-01-31 16:50:43,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 527 transitions, 10805 flow [2024-01-31 16:50:43,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:50:43,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:50:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 214 transitions. [2024-01-31 16:50:43,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35785953177257523 [2024-01-31 16:50:43,321 INFO L175 Difference]: Start difference. First operand has 450 places, 450 transitions, 8031 flow. Second operand 26 states and 214 transitions. [2024-01-31 16:50:43,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 527 transitions, 10805 flow [2024-01-31 16:50:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 527 transitions, 10611 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-01-31 16:50:45,041 INFO L231 Difference]: Finished difference. Result has 470 places, 456 transitions, 8381 flow [2024-01-31 16:50:45,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8381, PETRI_PLACES=470, PETRI_TRANSITIONS=456} [2024-01-31 16:50:45,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 447 predicate places. [2024-01-31 16:50:45,042 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 456 transitions, 8381 flow [2024-01-31 16:50:45,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.724137931034483) internal successors, (137), 29 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:50:45,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:45,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:45,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-01-31 16:50:45,256 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:45,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash -780924601, now seen corresponding path program 92 times [2024-01-31 16:50:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570166949] [2024-01-31 16:50:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:45,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570166949] [2024-01-31 16:50:45,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570166949] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:45,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534989665] [2024-01-31 16:50:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:50:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:45,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:45,747 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:45,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-01-31 16:50:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:50:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:46,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:50:46,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:50:46,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:46,447 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:50:46,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:50:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534989665] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:46,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:46,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 23 [2024-01-31 16:50:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366065549] [2024-01-31 16:50:46,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:46,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:50:46,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:50:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:50:46,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:46,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 456 transitions, 8381 flow. Second operand has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:50:46,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:46,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:46,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:48,333 INFO L124 PetriNetUnfolderBase]: 2048/3874 cut-off events. [2024-01-31 16:50:48,333 INFO L125 PetriNetUnfolderBase]: For 307156/307156 co-relation queries the response was YES. [2024-01-31 16:50:48,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48800 conditions, 3874 events. 2048/3874 cut-off events. For 307156/307156 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26959 event pairs, 787 based on Foata normal form. 28/3902 useless extension candidates. Maximal degree in co-relation 48599. Up to 3122 conditions per place. [2024-01-31 16:50:48,394 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 404 selfloop transitions, 115 changer transitions 3/523 dead transitions. [2024-01-31 16:50:48,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 523 transitions, 10782 flow [2024-01-31 16:50:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:50:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:50:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 171 transitions. [2024-01-31 16:50:48,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717391304347826 [2024-01-31 16:50:48,396 INFO L175 Difference]: Start difference. First operand has 470 places, 456 transitions, 8381 flow. Second operand 20 states and 171 transitions. [2024-01-31 16:50:48,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 523 transitions, 10782 flow [2024-01-31 16:50:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 523 transitions, 10460 flow, removed 72 selfloop flow, removed 21 redundant places. [2024-01-31 16:50:49,857 INFO L231 Difference]: Finished difference. Result has 470 places, 459 transitions, 8491 flow [2024-01-31 16:50:49,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8059, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8491, PETRI_PLACES=470, PETRI_TRANSITIONS=459} [2024-01-31 16:50:49,858 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 447 predicate places. [2024-01-31 16:50:49,858 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 459 transitions, 8491 flow [2024-01-31 16:50:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.260869565217392) internal successors, (121), 23 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:50:49,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:49,858 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:49,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-01-31 16:50:50,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-01-31 16:50:50,072 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:50,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1904756729, now seen corresponding path program 93 times [2024-01-31 16:50:50,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:50,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972344724] [2024-01-31 16:50:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972344724] [2024-01-31 16:50:50,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972344724] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:50,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779097711] [2024-01-31 16:50:50,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:50:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:50,589 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:50,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-01-31 16:50:51,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:50:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:51,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 16:50:51,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:51,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:51,430 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:50:51,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:50:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779097711] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:51,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 25 [2024-01-31 16:50:51,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951238016] [2024-01-31 16:50:51,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:51,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:50:51,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:50:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:50:51,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:51,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 459 transitions, 8491 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 16:50:51,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:51,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:51,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:53,222 INFO L124 PetriNetUnfolderBase]: 2075/3923 cut-off events. [2024-01-31 16:50:53,222 INFO L125 PetriNetUnfolderBase]: For 331705/331705 co-relation queries the response was YES. [2024-01-31 16:50:53,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50415 conditions, 3923 events. 2075/3923 cut-off events. For 331705/331705 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27358 event pairs, 877 based on Foata normal form. 16/3939 useless extension candidates. Maximal degree in co-relation 50214. Up to 3378 conditions per place. [2024-01-31 16:50:53,293 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 424 selfloop transitions, 91 changer transitions 2/518 dead transitions. [2024-01-31 16:50:53,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 518 transitions, 10480 flow [2024-01-31 16:50:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:50:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:50:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 154 transitions. [2024-01-31 16:50:53,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524027459954233 [2024-01-31 16:50:53,294 INFO L175 Difference]: Start difference. First operand has 470 places, 459 transitions, 8491 flow. Second operand 19 states and 154 transitions. [2024-01-31 16:50:53,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 518 transitions, 10480 flow [2024-01-31 16:50:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 518 transitions, 10246 flow, removed 46 selfloop flow, removed 14 redundant places. [2024-01-31 16:50:54,953 INFO L231 Difference]: Finished difference. Result has 477 places, 466 transitions, 8726 flow [2024-01-31 16:50:54,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8257, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8726, PETRI_PLACES=477, PETRI_TRANSITIONS=466} [2024-01-31 16:50:54,954 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2024-01-31 16:50:54,954 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 466 transitions, 8726 flow [2024-01-31 16:50:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 16:50:54,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:50:54,955 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:50:54,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-01-31 16:50:55,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:55,167 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:50:55,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:50:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash -901952861, now seen corresponding path program 94 times [2024-01-31 16:50:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:50:55,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101175951] [2024-01-31 16:50:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:50:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:50:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:50:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:55,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:50:55,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101175951] [2024-01-31 16:50:55,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101175951] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:50:55,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802719760] [2024-01-31 16:50:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:50:55,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:50:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:50:55,662 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:50:55,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-01-31 16:50:56,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:50:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:50:56,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:50:56,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:50:56,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:50:56,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:50:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:56,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:50:56,381 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:50:56,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:50:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:50:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802719760] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:50:56,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:50:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:50:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557161090] [2024-01-31 16:50:56,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:50:56,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:50:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:50:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:50:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:50:56,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:50:56,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 466 transitions, 8726 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:50:56,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:50:56,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:50:56,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:50:58,664 INFO L124 PetriNetUnfolderBase]: 2059/3897 cut-off events. [2024-01-31 16:50:58,664 INFO L125 PetriNetUnfolderBase]: For 352133/352133 co-relation queries the response was YES. [2024-01-31 16:50:58,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51317 conditions, 3897 events. 2059/3897 cut-off events. For 352133/352133 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27203 event pairs, 743 based on Foata normal form. 32/3929 useless extension candidates. Maximal degree in co-relation 51111. Up to 3015 conditions per place. [2024-01-31 16:50:58,740 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 429 selfloop transitions, 117 changer transitions 24/571 dead transitions. [2024-01-31 16:50:58,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 571 transitions, 12085 flow [2024-01-31 16:50:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:50:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:50:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 252 transitions. [2024-01-31 16:50:58,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652173913043478 [2024-01-31 16:50:58,741 INFO L175 Difference]: Start difference. First operand has 477 places, 466 transitions, 8726 flow. Second operand 30 states and 252 transitions. [2024-01-31 16:50:58,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 571 transitions, 12085 flow [2024-01-31 16:51:00,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 571 transitions, 11679 flow, removed 118 selfloop flow, removed 16 redundant places. [2024-01-31 16:51:00,503 INFO L231 Difference]: Finished difference. Result has 498 places, 466 transitions, 8881 flow [2024-01-31 16:51:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8881, PETRI_PLACES=498, PETRI_TRANSITIONS=466} [2024-01-31 16:51:00,503 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 475 predicate places. [2024-01-31 16:51:00,503 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 466 transitions, 8881 flow [2024-01-31 16:51:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:51:00,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:00,504 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:00,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-01-31 16:51:00,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-01-31 16:51:00,709 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:00,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1199822621, now seen corresponding path program 95 times [2024-01-31 16:51:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:00,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805184146] [2024-01-31 16:51:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:00,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:51:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805184146] [2024-01-31 16:51:01,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805184146] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:01,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215030310] [2024-01-31 16:51:01,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:51:01,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:01,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:01,398 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:01,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-01-31 16:51:01,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:51:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:01,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:51:01,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:02,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:02,162 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:02,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:51:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215030310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:02,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:02,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 32 [2024-01-31 16:51:02,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883434649] [2024-01-31 16:51:02,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:02,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 16:51:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 16:51:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-01-31 16:51:02,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:02,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 466 transitions, 8881 flow. Second operand has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:51:02,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:02,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:02,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:03,880 INFO L124 PetriNetUnfolderBase]: 2052/3858 cut-off events. [2024-01-31 16:51:03,880 INFO L125 PetriNetUnfolderBase]: For 413055/413055 co-relation queries the response was YES. [2024-01-31 16:51:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53111 conditions, 3858 events. 2052/3858 cut-off events. For 413055/413055 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26539 event pairs, 857 based on Foata normal form. 12/3870 useless extension candidates. Maximal degree in co-relation 52899. Up to 3351 conditions per place. [2024-01-31 16:51:03,958 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 398 selfloop transitions, 96 changer transitions 0/495 dead transitions. [2024-01-31 16:51:03,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 495 transitions, 10473 flow [2024-01-31 16:51:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:51:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:51:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2024-01-31 16:51:03,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31521739130434784 [2024-01-31 16:51:03,959 INFO L175 Difference]: Start difference. First operand has 498 places, 466 transitions, 8881 flow. Second operand 16 states and 116 transitions. [2024-01-31 16:51:03,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 495 transitions, 10473 flow [2024-01-31 16:51:06,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 495 transitions, 9842 flow, removed 205 selfloop flow, removed 21 redundant places. [2024-01-31 16:51:06,214 INFO L231 Difference]: Finished difference. Result has 487 places, 468 transitions, 8543 flow [2024-01-31 16:51:06,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8543, PETRI_PLACES=487, PETRI_TRANSITIONS=468} [2024-01-31 16:51:06,215 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2024-01-31 16:51:06,215 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 468 transitions, 8543 flow [2024-01-31 16:51:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.0) internal successors, (160), 32 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:51:06,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:06,215 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:06,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-01-31 16:51:06,429 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:06,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1418534301, now seen corresponding path program 96 times [2024-01-31 16:51:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490435911] [2024-01-31 16:51:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:06,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490435911] [2024-01-31 16:51:06,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490435911] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:06,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877070911] [2024-01-31 16:51:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:51:06,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:06,941 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:06,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-01-31 16:51:07,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:51:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:07,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:51:07,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:51:07,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:07,646 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:51:07,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:51:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877070911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:07,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-01-31 16:51:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776763639] [2024-01-31 16:51:07,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:07,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:51:07,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:51:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:51:07,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:07,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 468 transitions, 8543 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:51:07,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:07,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:07,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:09,327 INFO L124 PetriNetUnfolderBase]: 2046/3841 cut-off events. [2024-01-31 16:51:09,327 INFO L125 PetriNetUnfolderBase]: For 393159/393159 co-relation queries the response was YES. [2024-01-31 16:51:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51730 conditions, 3841 events. 2046/3841 cut-off events. For 393159/393159 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26347 event pairs, 873 based on Foata normal form. 4/3845 useless extension candidates. Maximal degree in co-relation 51519. Up to 3401 conditions per place. [2024-01-31 16:51:09,404 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 389 selfloop transitions, 94 changer transitions 13/497 dead transitions. [2024-01-31 16:51:09,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 497 transitions, 9956 flow [2024-01-31 16:51:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:51:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:51:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 130 transitions. [2024-01-31 16:51:09,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974828375286041 [2024-01-31 16:51:09,405 INFO L175 Difference]: Start difference. First operand has 487 places, 468 transitions, 8543 flow. Second operand 19 states and 130 transitions. [2024-01-31 16:51:09,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 497 transitions, 9956 flow [2024-01-31 16:51:11,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 497 transitions, 9698 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-01-31 16:51:11,724 INFO L231 Difference]: Finished difference. Result has 495 places, 468 transitions, 8502 flow [2024-01-31 16:51:11,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8297, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8502, PETRI_PLACES=495, PETRI_TRANSITIONS=468} [2024-01-31 16:51:11,725 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 472 predicate places. [2024-01-31 16:51:11,725 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 468 transitions, 8502 flow [2024-01-31 16:51:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:51:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:11,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:11,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:11,939 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:11,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash -871086587, now seen corresponding path program 97 times [2024-01-31 16:51:11,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:11,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644866537] [2024-01-31 16:51:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:51:12,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644866537] [2024-01-31 16:51:12,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644866537] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565198822] [2024-01-31 16:51:12,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:51:12,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:12,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:12,753 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:12,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-01-31 16:51:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:13,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:51:13,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:13,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:13,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:51:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:13,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:13,470 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:51:13,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:51:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:13,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565198822] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:13,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:13,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-31 16:51:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381057741] [2024-01-31 16:51:13,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:51:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:51:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:51:13,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:13,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 468 transitions, 8502 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 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 16:51:13,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:13,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:13,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:15,458 INFO L124 PetriNetUnfolderBase]: 2051/3837 cut-off events. [2024-01-31 16:51:15,458 INFO L125 PetriNetUnfolderBase]: For 402632/402632 co-relation queries the response was YES. [2024-01-31 16:51:15,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51954 conditions, 3837 events. 2051/3837 cut-off events. For 402632/402632 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26241 event pairs, 750 based on Foata normal form. 30/3867 useless extension candidates. Maximal degree in co-relation 51740. Up to 3067 conditions per place. [2024-01-31 16:51:15,526 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 404 selfloop transitions, 143 changer transitions 3/551 dead transitions. [2024-01-31 16:51:15,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 551 transitions, 11310 flow [2024-01-31 16:51:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:51:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:51:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 238 transitions. [2024-01-31 16:51:15,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3338008415147265 [2024-01-31 16:51:15,527 INFO L175 Difference]: Start difference. First operand has 495 places, 468 transitions, 8502 flow. Second operand 31 states and 238 transitions. [2024-01-31 16:51:15,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 551 transitions, 11310 flow [2024-01-31 16:51:17,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 551 transitions, 11084 flow, removed 19 selfloop flow, removed 17 redundant places. [2024-01-31 16:51:17,839 INFO L231 Difference]: Finished difference. Result has 504 places, 473 transitions, 8950 flow [2024-01-31 16:51:17,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8227, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8950, PETRI_PLACES=504, PETRI_TRANSITIONS=473} [2024-01-31 16:51:17,840 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 481 predicate places. [2024-01-31 16:51:17,840 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 473 transitions, 8950 flow [2024-01-31 16:51:17,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 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 16:51:17,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:17,841 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:17,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:18,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:18,054 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:18,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -947448057, now seen corresponding path program 98 times [2024-01-31 16:51:18,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:18,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99732808] [2024-01-31 16:51:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:18,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:18,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99732808] [2024-01-31 16:51:18,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99732808] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655014694] [2024-01-31 16:51:18,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:51:18,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:18,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:18,503 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-01-31 16:51:18,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:51:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:18,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:51:18,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:19,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:19,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:51:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:51:19,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:19,250 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:19,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:51:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:19,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655014694] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:19,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:19,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:51:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642686520] [2024-01-31 16:51:19,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:19,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:51:19,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:51:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:51:19,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:19,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 473 transitions, 8950 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:51:19,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:19,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:19,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:20,818 INFO L124 PetriNetUnfolderBase]: 2073/3889 cut-off events. [2024-01-31 16:51:20,818 INFO L125 PetriNetUnfolderBase]: For 446601/446601 co-relation queries the response was YES. [2024-01-31 16:51:20,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54214 conditions, 3889 events. 2073/3889 cut-off events. For 446601/446601 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 26707 event pairs, 818 based on Foata normal form. 6/3895 useless extension candidates. Maximal degree in co-relation 53999. Up to 3251 conditions per place. [2024-01-31 16:51:20,890 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 415 selfloop transitions, 98 changer transitions 6/520 dead transitions. [2024-01-31 16:51:20,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 520 transitions, 10937 flow [2024-01-31 16:51:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:51:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:51:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-01-31 16:51:20,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641304347826087 [2024-01-31 16:51:20,892 INFO L175 Difference]: Start difference. First operand has 504 places, 473 transitions, 8950 flow. Second operand 16 states and 134 transitions. [2024-01-31 16:51:20,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 520 transitions, 10937 flow [2024-01-31 16:51:22,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 520 transitions, 10444 flow, removed 123 selfloop flow, removed 24 redundant places. [2024-01-31 16:51:22,947 INFO L231 Difference]: Finished difference. Result has 498 places, 475 transitions, 8835 flow [2024-01-31 16:51:22,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8457, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8835, PETRI_PLACES=498, PETRI_TRANSITIONS=475} [2024-01-31 16:51:22,947 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 475 predicate places. [2024-01-31 16:51:22,947 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 475 transitions, 8835 flow [2024-01-31 16:51:22,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:51:22,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:22,948 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:22,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-01-31 16:51:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-01-31 16:51:23,162 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash 986986310, now seen corresponding path program 99 times [2024-01-31 16:51:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212240330] [2024-01-31 16:51:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:51:24,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212240330] [2024-01-31 16:51:24,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212240330] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:24,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753593824] [2024-01-31 16:51:24,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:51:24,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:24,396 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:24,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-01-31 16:51:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:51:24,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:24,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:51:24,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:25,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:25,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:51:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:25,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:25,237 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:25,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:51:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:25,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753593824] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:25,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:25,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 35 [2024-01-31 16:51:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644733382] [2024-01-31 16:51:25,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:25,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:51:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:25,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:51:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:51:25,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:25,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 475 transitions, 8835 flow. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:51:25,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:25,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:25,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:27,257 INFO L124 PetriNetUnfolderBase]: 2060/3864 cut-off events. [2024-01-31 16:51:27,257 INFO L125 PetriNetUnfolderBase]: For 457918/457918 co-relation queries the response was YES. [2024-01-31 16:51:27,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53871 conditions, 3864 events. 2060/3864 cut-off events. For 457918/457918 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26424 event pairs, 875 based on Foata normal form. 4/3868 useless extension candidates. Maximal degree in co-relation 53654. Up to 3410 conditions per place. [2024-01-31 16:51:27,325 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 394 selfloop transitions, 101 changer transitions 4/500 dead transitions. [2024-01-31 16:51:27,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 500 transitions, 10276 flow [2024-01-31 16:51:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:51:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:51:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 151 transitions. [2024-01-31 16:51:27,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28544423440453687 [2024-01-31 16:51:27,327 INFO L175 Difference]: Start difference. First operand has 498 places, 475 transitions, 8835 flow. Second operand 23 states and 151 transitions. [2024-01-31 16:51:27,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 500 transitions, 10276 flow [2024-01-31 16:51:29,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 500 transitions, 9945 flow, removed 75 selfloop flow, removed 12 redundant places. [2024-01-31 16:51:29,235 INFO L231 Difference]: Finished difference. Result has 507 places, 473 transitions, 8699 flow [2024-01-31 16:51:29,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8508, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8699, PETRI_PLACES=507, PETRI_TRANSITIONS=473} [2024-01-31 16:51:29,235 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 484 predicate places. [2024-01-31 16:51:29,236 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 473 transitions, 8699 flow [2024-01-31 16:51:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 0 states have call successors, (0), 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 16:51:29,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:29,236 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:29,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-01-31 16:51:29,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:29,449 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:29,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash -517011729, now seen corresponding path program 100 times [2024-01-31 16:51:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:29,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886512349] [2024-01-31 16:51:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:29,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:51:30,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886512349] [2024-01-31 16:51:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886512349] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501084976] [2024-01-31 16:51:30,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:51:30,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:30,662 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:30,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-01-31 16:51:31,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:51:31,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:31,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:51:31,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:31,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:31,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:51:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:31,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:31,484 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:31,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:51:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501084976] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:31,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:31,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-01-31 16:51:31,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487356583] [2024-01-31 16:51:31,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:31,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:51:31,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:51:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:51:31,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:31,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 473 transitions, 8699 flow. Second operand has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:31,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:31,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:31,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:33,592 INFO L124 PetriNetUnfolderBase]: 2071/3871 cut-off events. [2024-01-31 16:51:33,593 INFO L125 PetriNetUnfolderBase]: For 406191/406191 co-relation queries the response was YES. [2024-01-31 16:51:33,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52410 conditions, 3871 events. 2071/3871 cut-off events. For 406191/406191 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26434 event pairs, 823 based on Foata normal form. 12/3883 useless extension candidates. Maximal degree in co-relation 52191. Up to 3265 conditions per place. [2024-01-31 16:51:33,675 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 397 selfloop transitions, 116 changer transitions 0/514 dead transitions. [2024-01-31 16:51:33,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 514 transitions, 10487 flow [2024-01-31 16:51:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:51:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:51:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 169 transitions. [2024-01-31 16:51:33,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29391304347826086 [2024-01-31 16:51:33,676 INFO L175 Difference]: Start difference. First operand has 507 places, 473 transitions, 8699 flow. Second operand 25 states and 169 transitions. [2024-01-31 16:51:33,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 514 transitions, 10487 flow [2024-01-31 16:51:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 514 transitions, 10204 flow, removed 36 selfloop flow, removed 25 redundant places. [2024-01-31 16:51:35,785 INFO L231 Difference]: Finished difference. Result has 504 places, 477 transitions, 8827 flow [2024-01-31 16:51:35,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8392, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8827, PETRI_PLACES=504, PETRI_TRANSITIONS=477} [2024-01-31 16:51:35,786 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 481 predicate places. [2024-01-31 16:51:35,786 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 477 transitions, 8827 flow [2024-01-31 16:51:35,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.666666666666667) internal successors, (154), 33 states have internal predecessors, (154), 0 states have call successors, (0), 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 16:51:35,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:35,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:35,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-01-31 16:51:36,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:36,000 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:36,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2060071690, now seen corresponding path program 101 times [2024-01-31 16:51:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:36,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001900943] [2024-01-31 16:51:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:51:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001900943] [2024-01-31 16:51:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001900943] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707312456] [2024-01-31 16:51:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:51:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:37,142 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:37,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-01-31 16:51:37,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:51:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:37,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:51:37,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:37,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:37,991 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:37,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:51:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707312456] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:38,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:38,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 38 [2024-01-31 16:51:38,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453282974] [2024-01-31 16:51:38,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:38,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:51:38,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:38,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:51:38,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:51:38,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:38,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 477 transitions, 8827 flow. Second operand has 38 states, 38 states have (on average 4.631578947368421) internal successors, (176), 38 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:51:38,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:38,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:38,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:39,918 INFO L124 PetriNetUnfolderBase]: 2061/3850 cut-off events. [2024-01-31 16:51:39,918 INFO L125 PetriNetUnfolderBase]: For 397188/397188 co-relation queries the response was YES. [2024-01-31 16:51:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51923 conditions, 3850 events. 2061/3850 cut-off events. For 397188/397188 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 26217 event pairs, 885 based on Foata normal form. 4/3854 useless extension candidates. Maximal degree in co-relation 51707. Up to 3435 conditions per place. [2024-01-31 16:51:39,991 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 388 selfloop transitions, 96 changer transitions 8/493 dead transitions. [2024-01-31 16:51:39,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 493 transitions, 10002 flow [2024-01-31 16:51:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:51:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:51:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 136 transitions. [2024-01-31 16:51:39,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26877470355731226 [2024-01-31 16:51:39,993 INFO L175 Difference]: Start difference. First operand has 504 places, 477 transitions, 8827 flow. Second operand 22 states and 136 transitions. [2024-01-31 16:51:39,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 493 transitions, 10002 flow [2024-01-31 16:51:42,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 493 transitions, 9668 flow, removed 54 selfloop flow, removed 23 redundant places. [2024-01-31 16:51:42,104 INFO L231 Difference]: Finished difference. Result has 502 places, 474 transitions, 8646 flow [2024-01-31 16:51:42,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8646, PETRI_PLACES=502, PETRI_TRANSITIONS=474} [2024-01-31 16:51:42,105 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 479 predicate places. [2024-01-31 16:51:42,105 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 474 transitions, 8646 flow [2024-01-31 16:51:42,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.631578947368421) internal successors, (176), 38 states have internal predecessors, (176), 0 states have call successors, (0), 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 16:51:42,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:42,106 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:42,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-01-31 16:51:42,319 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2141178494, now seen corresponding path program 102 times [2024-01-31 16:51:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:42,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559747884] [2024-01-31 16:51:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:51:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559747884] [2024-01-31 16:51:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559747884] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115545826] [2024-01-31 16:51:43,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:51:43,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:43,428 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:43,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-01-31 16:51:44,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:51:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:44,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:51:44,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:44,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:44,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:51:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:44,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:44,405 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:44,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:51:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:44,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115545826] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:44,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:44,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 34 [2024-01-31 16:51:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966004320] [2024-01-31 16:51:44,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:44,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 16:51:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 16:51:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 16:51:44,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:44,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 474 transitions, 8646 flow. Second operand has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 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 16:51:44,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:44,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:44,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:46,719 INFO L124 PetriNetUnfolderBase]: 2090/3907 cut-off events. [2024-01-31 16:51:46,719 INFO L125 PetriNetUnfolderBase]: For 414451/414451 co-relation queries the response was YES. [2024-01-31 16:51:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52789 conditions, 3907 events. 2090/3907 cut-off events. For 414451/414451 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26708 event pairs, 920 based on Foata normal form. 8/3915 useless extension candidates. Maximal degree in co-relation 52573. Up to 3546 conditions per place. [2024-01-31 16:51:46,797 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 442 selfloop transitions, 80 changer transitions 2/525 dead transitions. [2024-01-31 16:51:46,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 525 transitions, 10571 flow [2024-01-31 16:51:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:51:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:51:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 199 transitions. [2024-01-31 16:51:46,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090062111801242 [2024-01-31 16:51:46,799 INFO L175 Difference]: Start difference. First operand has 502 places, 474 transitions, 8646 flow. Second operand 28 states and 199 transitions. [2024-01-31 16:51:46,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 525 transitions, 10571 flow [2024-01-31 16:51:48,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 525 transitions, 10377 flow, removed 1 selfloop flow, removed 20 redundant places. [2024-01-31 16:51:48,839 INFO L231 Difference]: Finished difference. Result has 507 places, 478 transitions, 8786 flow [2024-01-31 16:51:48,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8452, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8786, PETRI_PLACES=507, PETRI_TRANSITIONS=478} [2024-01-31 16:51:48,839 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 484 predicate places. [2024-01-31 16:51:48,840 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 478 transitions, 8786 flow [2024-01-31 16:51:48,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.676470588235294) internal successors, (159), 34 states have internal predecessors, (159), 0 states have call successors, (0), 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 16:51:48,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:48,840 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:48,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-01-31 16:51:49,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:49,053 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:49,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2088494178, now seen corresponding path program 103 times [2024-01-31 16:51:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:49,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788761110] [2024-01-31 16:51:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:49,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788761110] [2024-01-31 16:51:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788761110] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:49,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525041280] [2024-01-31 16:51:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:51:49,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:49,589 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:49,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-01-31 16:51:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:50,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:51:50,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:50,183 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:51:50,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-01-31 16:51:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:50,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:50,339 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:51:50,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:51:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525041280] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:50,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:50,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:51:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174129578] [2024-01-31 16:51:50,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:50,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:51:50,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:51:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:51:50,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:50,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 478 transitions, 8786 flow. Second operand has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 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 16:51:50,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:50,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:50,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:52,114 INFO L124 PetriNetUnfolderBase]: 2110/3936 cut-off events. [2024-01-31 16:51:52,115 INFO L125 PetriNetUnfolderBase]: For 433687/433687 co-relation queries the response was YES. [2024-01-31 16:51:52,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53914 conditions, 3936 events. 2110/3936 cut-off events. For 433687/433687 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26905 event pairs, 954 based on Foata normal form. 20/3956 useless extension candidates. Maximal degree in co-relation 53697. Up to 3682 conditions per place. [2024-01-31 16:51:52,197 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 473 selfloop transitions, 52 changer transitions 4/530 dead transitions. [2024-01-31 16:51:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 530 transitions, 11558 flow [2024-01-31 16:51:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:51:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:51:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 161 transitions. [2024-01-31 16:51:52,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-01-31 16:51:52,198 INFO L175 Difference]: Start difference. First operand has 507 places, 478 transitions, 8786 flow. Second operand 22 states and 161 transitions. [2024-01-31 16:51:52,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 530 transitions, 11558 flow [2024-01-31 16:51:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 530 transitions, 11361 flow, removed 25 selfloop flow, removed 25 redundant places. [2024-01-31 16:51:54,393 INFO L231 Difference]: Finished difference. Result has 509 places, 487 transitions, 9144 flow [2024-01-31 16:51:54,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8589, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9144, PETRI_PLACES=509, PETRI_TRANSITIONS=487} [2024-01-31 16:51:54,393 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 486 predicate places. [2024-01-31 16:51:54,393 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 487 transitions, 9144 flow [2024-01-31 16:51:54,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.0) internal successors, (120), 24 states have internal predecessors, (120), 0 states have call successors, (0), 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 16:51:54,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:51:54,394 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:51:54,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-01-31 16:51:54,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-01-31 16:51:54,607 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:51:54,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:51:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash 931826820, now seen corresponding path program 104 times [2024-01-31 16:51:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:51:54,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038160685] [2024-01-31 16:51:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:51:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:51:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:51:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:55,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:51:55,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038160685] [2024-01-31 16:51:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038160685] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:51:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915467633] [2024-01-31 16:51:55,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:51:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:51:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:51:55,090 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:51:55,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-01-31 16:51:55,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:51:55,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:51:55,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:51:55,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:51:55,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:51:55,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:51:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:51:55,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:51:55,873 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:51:55,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:51:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:51:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915467633] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:51:55,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:51:55,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:51:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783486530] [2024-01-31 16:51:55,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:51:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:51:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:51:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:51:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:51:55,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:51:55,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 487 transitions, 9144 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:51:55,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:51:55,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:51:55,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:51:57,952 INFO L124 PetriNetUnfolderBase]: 2140/4007 cut-off events. [2024-01-31 16:51:57,953 INFO L125 PetriNetUnfolderBase]: For 471538/471538 co-relation queries the response was YES. [2024-01-31 16:51:58,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56226 conditions, 4007 events. 2140/4007 cut-off events. For 471538/471538 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27638 event pairs, 945 based on Foata normal form. 8/4015 useless extension candidates. Maximal degree in co-relation 56005. Up to 3616 conditions per place. [2024-01-31 16:51:58,039 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 474 selfloop transitions, 71 changer transitions 9/555 dead transitions. [2024-01-31 16:51:58,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 555 transitions, 11601 flow [2024-01-31 16:51:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:51:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:51:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 190 transitions. [2024-01-31 16:51:58,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591682419659735 [2024-01-31 16:51:58,041 INFO L175 Difference]: Start difference. First operand has 509 places, 487 transitions, 9144 flow. Second operand 23 states and 190 transitions. [2024-01-31 16:51:58,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 555 transitions, 11601 flow [2024-01-31 16:52:00,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 555 transitions, 11261 flow, removed 129 selfloop flow, removed 15 redundant places. [2024-01-31 16:52:00,641 INFO L231 Difference]: Finished difference. Result has 519 places, 492 transitions, 9132 flow [2024-01-31 16:52:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8804, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9132, PETRI_PLACES=519, PETRI_TRANSITIONS=492} [2024-01-31 16:52:00,642 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 496 predicate places. [2024-01-31 16:52:00,642 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 492 transitions, 9132 flow [2024-01-31 16:52:00,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:52:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:00,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:00,857 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:00,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1131185506, now seen corresponding path program 105 times [2024-01-31 16:52:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460877183] [2024-01-31 16:52:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:00,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:01,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460877183] [2024-01-31 16:52:01,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460877183] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797444880] [2024-01-31 16:52:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:01,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:01,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:01,415 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:01,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-01-31 16:52:01,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:52:01,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:01,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:52:01,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:02,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:02,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:52:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:52:02,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:02,250 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:02,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:52:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:02,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797444880] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:02,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:02,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:52:02,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829706589] [2024-01-31 16:52:02,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:52:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:52:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:52:02,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:02,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 492 transitions, 9132 flow. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 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 16:52:02,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:02,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:02,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:04,299 INFO L124 PetriNetUnfolderBase]: 2164/4094 cut-off events. [2024-01-31 16:52:04,299 INFO L125 PetriNetUnfolderBase]: For 505916/505916 co-relation queries the response was YES. [2024-01-31 16:52:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58324 conditions, 4094 events. 2164/4094 cut-off events. For 505916/505916 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 28642 event pairs, 943 based on Foata normal form. 28/4122 useless extension candidates. Maximal degree in co-relation 58100. Up to 3627 conditions per place. [2024-01-31 16:52:04,390 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 476 selfloop transitions, 67 changer transitions 10/554 dead transitions. [2024-01-31 16:52:04,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 554 transitions, 12243 flow [2024-01-31 16:52:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:52:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:52:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 173 transitions. [2024-01-31 16:52:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3270321361058601 [2024-01-31 16:52:04,391 INFO L175 Difference]: Start difference. First operand has 519 places, 492 transitions, 9132 flow. Second operand 23 states and 173 transitions. [2024-01-31 16:52:04,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 554 transitions, 12243 flow [2024-01-31 16:52:07,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 554 transitions, 12046 flow, removed 38 selfloop flow, removed 16 redundant places. [2024-01-31 16:52:07,111 INFO L231 Difference]: Finished difference. Result has 528 places, 496 transitions, 9463 flow [2024-01-31 16:52:07,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8930, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9463, PETRI_PLACES=528, PETRI_TRANSITIONS=496} [2024-01-31 16:52:07,111 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 505 predicate places. [2024-01-31 16:52:07,112 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 496 transitions, 9463 flow [2024-01-31 16:52:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 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 16:52:07,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:07,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:07,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:07,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-01-31 16:52:07,326 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:07,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:07,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1701246021, now seen corresponding path program 106 times [2024-01-31 16:52:07,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:07,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863739108] [2024-01-31 16:52:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:07,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:52:08,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863739108] [2024-01-31 16:52:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863739108] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994920080] [2024-01-31 16:52:08,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:08,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:08,516 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:08,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-01-31 16:52:09,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:09,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:09,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:52:09,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:09,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:09,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:52:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:09,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:09,280 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:52:09,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:52:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994920080] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:09,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:09,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 35 [2024-01-31 16:52:09,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721417324] [2024-01-31 16:52:09,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:09,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:52:09,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:52:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:52:09,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:09,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 496 transitions, 9463 flow. Second operand has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:09,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:09,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:09,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:11,652 INFO L124 PetriNetUnfolderBase]: 2204/4166 cut-off events. [2024-01-31 16:52:11,653 INFO L125 PetriNetUnfolderBase]: For 550867/550867 co-relation queries the response was YES. [2024-01-31 16:52:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61203 conditions, 4166 events. 2204/4166 cut-off events. For 550867/550867 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29265 event pairs, 929 based on Foata normal form. 10/4176 useless extension candidates. Maximal degree in co-relation 60976. Up to 3622 conditions per place. [2024-01-31 16:52:11,729 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 469 selfloop transitions, 87 changer transitions 7/564 dead transitions. [2024-01-31 16:52:11,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 564 transitions, 12296 flow [2024-01-31 16:52:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:52:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:52:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 214 transitions. [2024-01-31 16:52:11,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3101449275362319 [2024-01-31 16:52:11,730 INFO L175 Difference]: Start difference. First operand has 528 places, 496 transitions, 9463 flow. Second operand 30 states and 214 transitions. [2024-01-31 16:52:11,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 564 transitions, 12296 flow [2024-01-31 16:52:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 564 transitions, 11915 flow, removed 148 selfloop flow, removed 19 redundant places. [2024-01-31 16:52:14,080 INFO L231 Difference]: Finished difference. Result has 541 places, 501 transitions, 9691 flow [2024-01-31 16:52:14,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9108, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9691, PETRI_PLACES=541, PETRI_TRANSITIONS=501} [2024-01-31 16:52:14,089 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 518 predicate places. [2024-01-31 16:52:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 501 transitions, 9691 flow [2024-01-31 16:52:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 0 states have call successors, (0), 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 16:52:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:14,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:14,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-01-31 16:52:14,303 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:14,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1598044633, now seen corresponding path program 107 times [2024-01-31 16:52:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:14,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571020752] [2024-01-31 16:52:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571020752] [2024-01-31 16:52:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571020752] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868124773] [2024-01-31 16:52:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:14,762 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:14,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-01-31 16:52:15,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:52:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:15,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:52:15,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:15,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:15,607 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:15,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:52:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868124773] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:15,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:15,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:52:15,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318452844] [2024-01-31 16:52:15,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:15,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:52:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:52:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:52:15,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:15,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 501 transitions, 9691 flow. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:52:15,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:15,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:15,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:17,479 INFO L124 PetriNetUnfolderBase]: 2243/4229 cut-off events. [2024-01-31 16:52:17,479 INFO L125 PetriNetUnfolderBase]: For 592923/592923 co-relation queries the response was YES. [2024-01-31 16:52:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62827 conditions, 4229 events. 2243/4229 cut-off events. For 592923/592923 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29723 event pairs, 1007 based on Foata normal form. 18/4247 useless extension candidates. Maximal degree in co-relation 62593. Up to 3868 conditions per place. [2024-01-31 16:52:17,559 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 511 selfloop transitions, 55 changer transitions 0/567 dead transitions. [2024-01-31 16:52:17,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 567 transitions, 12136 flow [2024-01-31 16:52:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:52:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:52:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 166 transitions. [2024-01-31 16:52:17,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36086956521739133 [2024-01-31 16:52:17,560 INFO L175 Difference]: Start difference. First operand has 541 places, 501 transitions, 9691 flow. Second operand 20 states and 166 transitions. [2024-01-31 16:52:17,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 567 transitions, 12136 flow [2024-01-31 16:52:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 567 transitions, 11782 flow, removed 125 selfloop flow, removed 24 redundant places. [2024-01-31 16:52:20,226 INFO L231 Difference]: Finished difference. Result has 539 places, 507 transitions, 9710 flow [2024-01-31 16:52:20,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9710, PETRI_PLACES=539, PETRI_TRANSITIONS=507} [2024-01-31 16:52:20,227 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2024-01-31 16:52:20,227 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 507 transitions, 9710 flow [2024-01-31 16:52:20,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:52:20,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:20,227 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:20,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-01-31 16:52:20,438 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:20,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1048522677, now seen corresponding path program 108 times [2024-01-31 16:52:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096924405] [2024-01-31 16:52:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:20,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:20,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096924405] [2024-01-31 16:52:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096924405] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:20,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145161558] [2024-01-31 16:52:20,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:52:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:20,907 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:20,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-01-31 16:52:21,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:52:21,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:21,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:52:21,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:21,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:21,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:52:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:21,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:21,827 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:52:21,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:52:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:21,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145161558] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:21,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:21,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-31 16:52:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834904955] [2024-01-31 16:52:21,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:52:21,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:52:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:52:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 507 transitions, 9710 flow. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 16:52:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:21,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:23,730 INFO L124 PetriNetUnfolderBase]: 2267/4271 cut-off events. [2024-01-31 16:52:23,730 INFO L125 PetriNetUnfolderBase]: For 592900/592900 co-relation queries the response was YES. [2024-01-31 16:52:23,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63159 conditions, 4271 events. 2267/4271 cut-off events. For 592900/592900 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30048 event pairs, 934 based on Foata normal form. 18/4289 useless extension candidates. Maximal degree in co-relation 62923. Up to 3716 conditions per place. [2024-01-31 16:52:23,817 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 497 selfloop transitions, 78 changer transitions 1/577 dead transitions. [2024-01-31 16:52:23,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 577 transitions, 12463 flow [2024-01-31 16:52:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:52:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:52:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-01-31 16:52:23,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2024-01-31 16:52:23,818 INFO L175 Difference]: Start difference. First operand has 539 places, 507 transitions, 9710 flow. Second operand 20 states and 170 transitions. [2024-01-31 16:52:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 577 transitions, 12463 flow [2024-01-31 16:52:27,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 577 transitions, 12229 flow, removed 57 selfloop flow, removed 18 redundant places. [2024-01-31 16:52:27,187 INFO L231 Difference]: Finished difference. Result has 542 places, 512 transitions, 9908 flow [2024-01-31 16:52:27,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9476, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9908, PETRI_PLACES=542, PETRI_TRANSITIONS=512} [2024-01-31 16:52:27,188 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 519 predicate places. [2024-01-31 16:52:27,188 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 512 transitions, 9908 flow [2024-01-31 16:52:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 16:52:27,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:27,188 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:27,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:27,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2024-01-31 16:52:27,402 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:27,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1398877861, now seen corresponding path program 109 times [2024-01-31 16:52:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535284620] [2024-01-31 16:52:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535284620] [2024-01-31 16:52:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535284620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731043504] [2024-01-31 16:52:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:52:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:27,853 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:27,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-01-31 16:52:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:28,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:52:28,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:28,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:28,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:52:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:28,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:28,624 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:28,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:52:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731043504] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:28,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:52:28,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884658891] [2024-01-31 16:52:28,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:52:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:52:28,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:52:28,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:28,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 512 transitions, 9908 flow. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:52:28,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:28,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:28,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:30,852 INFO L124 PetriNetUnfolderBase]: 2377/4495 cut-off events. [2024-01-31 16:52:30,853 INFO L125 PetriNetUnfolderBase]: For 657433/657433 co-relation queries the response was YES. [2024-01-31 16:52:30,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67696 conditions, 4495 events. 2377/4495 cut-off events. For 657433/657433 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32160 event pairs, 1004 based on Foata normal form. 18/4513 useless extension candidates. Maximal degree in co-relation 67461. Up to 3869 conditions per place. [2024-01-31 16:52:30,945 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 538 selfloop transitions, 83 changer transitions 4/626 dead transitions. [2024-01-31 16:52:30,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 626 transitions, 13965 flow [2024-01-31 16:52:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:52:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:52:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 227 transitions. [2024-01-31 16:52:30,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3795986622073579 [2024-01-31 16:52:30,946 INFO L175 Difference]: Start difference. First operand has 542 places, 512 transitions, 9908 flow. Second operand 26 states and 227 transitions. [2024-01-31 16:52:30,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 626 transitions, 13965 flow [2024-01-31 16:52:34,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 626 transitions, 13626 flow, removed 101 selfloop flow, removed 14 redundant places. [2024-01-31 16:52:34,163 INFO L231 Difference]: Finished difference. Result has 559 places, 530 transitions, 10765 flow [2024-01-31 16:52:34,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9569, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10765, PETRI_PLACES=559, PETRI_TRANSITIONS=530} [2024-01-31 16:52:34,164 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 536 predicate places. [2024-01-31 16:52:34,164 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 530 transitions, 10765 flow [2024-01-31 16:52:34,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 16:52:34,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:34,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:34,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:34,378 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:34,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 541668866, now seen corresponding path program 110 times [2024-01-31 16:52:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351539428] [2024-01-31 16:52:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:34,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:34,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351539428] [2024-01-31 16:52:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351539428] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:34,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383347486] [2024-01-31 16:52:34,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:52:34,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:34,891 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:34,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-01-31 16:52:35,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:52:35,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:35,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:52:35,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:52:35,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:35,645 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:35,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:52:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:35,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383347486] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:35,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:35,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:52:35,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105677490] [2024-01-31 16:52:35,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:52:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:52:35,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:52:35,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:35,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 530 transitions, 10765 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:52:35,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:35,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:35,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:37,602 INFO L124 PetriNetUnfolderBase]: 2369/4487 cut-off events. [2024-01-31 16:52:37,603 INFO L125 PetriNetUnfolderBase]: For 706291/706291 co-relation queries the response was YES. [2024-01-31 16:52:37,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69150 conditions, 4487 events. 2369/4487 cut-off events. For 706291/706291 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32044 event pairs, 1130 based on Foata normal form. 8/4495 useless extension candidates. Maximal degree in co-relation 68909. Up to 4260 conditions per place. [2024-01-31 16:52:37,689 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 494 selfloop transitions, 43 changer transitions 24/562 dead transitions. [2024-01-31 16:52:37,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 562 transitions, 12263 flow [2024-01-31 16:52:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:52:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:52:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 121 transitions. [2024-01-31 16:52:37,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.309462915601023 [2024-01-31 16:52:37,690 INFO L175 Difference]: Start difference. First operand has 559 places, 530 transitions, 10765 flow. Second operand 17 states and 121 transitions. [2024-01-31 16:52:37,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 562 transitions, 12263 flow [2024-01-31 16:52:41,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 562 transitions, 11474 flow, removed 349 selfloop flow, removed 17 redundant places. [2024-01-31 16:52:41,549 INFO L231 Difference]: Finished difference. Result has 561 places, 528 transitions, 10145 flow [2024-01-31 16:52:41,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10063, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10145, PETRI_PLACES=561, PETRI_TRANSITIONS=528} [2024-01-31 16:52:41,550 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 538 predicate places. [2024-01-31 16:52:41,550 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 528 transitions, 10145 flow [2024-01-31 16:52:41,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:52:41,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:41,550 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:41,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:41,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:41,764 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:41,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash -155782091, now seen corresponding path program 111 times [2024-01-31 16:52:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:41,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338364259] [2024-01-31 16:52:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:52:42,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:42,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338364259] [2024-01-31 16:52:42,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338364259] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:42,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429011706] [2024-01-31 16:52:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:52:42,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:42,467 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:42,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-01-31 16:52:42,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:52:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:43,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:52:43,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:43,124 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:52:43,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:52:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:43,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:43,254 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:43,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:52:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:43,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429011706] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:43,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:43,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 28 [2024-01-31 16:52:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677068238] [2024-01-31 16:52:43,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 16:52:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 16:52:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-01-31 16:52:43,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:43,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 528 transitions, 10145 flow. Second operand has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:52:43,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:43,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:43,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:45,182 INFO L124 PetriNetUnfolderBase]: 2381/4480 cut-off events. [2024-01-31 16:52:45,182 INFO L125 PetriNetUnfolderBase]: For 664585/664585 co-relation queries the response was YES. [2024-01-31 16:52:45,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67174 conditions, 4480 events. 2381/4480 cut-off events. For 664585/664585 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31789 event pairs, 1072 based on Foata normal form. 18/4498 useless extension candidates. Maximal degree in co-relation 66928. Up to 4122 conditions per place. [2024-01-31 16:52:45,271 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 505 selfloop transitions, 69 changer transitions 0/575 dead transitions. [2024-01-31 16:52:45,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 575 transitions, 12231 flow [2024-01-31 16:52:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:52:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:52:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 158 transitions. [2024-01-31 16:52:45,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225296442687744 [2024-01-31 16:52:45,273 INFO L175 Difference]: Start difference. First operand has 561 places, 528 transitions, 10145 flow. Second operand 22 states and 158 transitions. [2024-01-31 16:52:45,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 575 transitions, 12231 flow [2024-01-31 16:52:48,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 575 transitions, 12103 flow, removed 19 selfloop flow, removed 17 redundant places. [2024-01-31 16:52:48,843 INFO L231 Difference]: Finished difference. Result has 562 places, 531 transitions, 10253 flow [2024-01-31 16:52:48,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9913, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10253, PETRI_PLACES=562, PETRI_TRANSITIONS=531} [2024-01-31 16:52:48,843 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 539 predicate places. [2024-01-31 16:52:48,843 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 531 transitions, 10253 flow [2024-01-31 16:52:48,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.0) internal successors, (140), 28 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:52:48,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:48,844 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:48,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-01-31 16:52:49,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:49,053 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:49,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1899732967, now seen corresponding path program 112 times [2024-01-31 16:52:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:49,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214629273] [2024-01-31 16:52:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214629273] [2024-01-31 16:52:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214629273] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817086043] [2024-01-31 16:52:49,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:52:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:49,560 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:49,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-01-31 16:52:50,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:52:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:50,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:52:50,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:50,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:50,347 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:50,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:52:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817086043] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:50,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-31 16:52:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069454911] [2024-01-31 16:52:50,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:50,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:52:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:52:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:52:50,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:50,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 531 transitions, 10253 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:52:50,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:50,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:50,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:52:52,477 INFO L124 PetriNetUnfolderBase]: 2376/4470 cut-off events. [2024-01-31 16:52:52,477 INFO L125 PetriNetUnfolderBase]: For 657391/657391 co-relation queries the response was YES. [2024-01-31 16:52:52,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66935 conditions, 4470 events. 2376/4470 cut-off events. For 657391/657391 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31691 event pairs, 1114 based on Foata normal form. 6/4476 useless extension candidates. Maximal degree in co-relation 66691. Up to 4269 conditions per place. [2024-01-31 16:52:52,569 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 501 selfloop transitions, 40 changer transitions 14/556 dead transitions. [2024-01-31 16:52:52,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 556 transitions, 11958 flow [2024-01-31 16:52:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:52:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:52:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 118 transitions. [2024-01-31 16:52:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30179028132992325 [2024-01-31 16:52:52,570 INFO L175 Difference]: Start difference. First operand has 562 places, 531 transitions, 10253 flow. Second operand 17 states and 118 transitions. [2024-01-31 16:52:52,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 556 transitions, 11958 flow [2024-01-31 16:52:55,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 556 transitions, 11819 flow, removed 6 selfloop flow, removed 19 redundant places. [2024-01-31 16:52:55,887 INFO L231 Difference]: Finished difference. Result has 562 places, 528 transitions, 10158 flow [2024-01-31 16:52:55,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10093, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10158, PETRI_PLACES=562, PETRI_TRANSITIONS=528} [2024-01-31 16:52:55,888 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 539 predicate places. [2024-01-31 16:52:55,888 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 528 transitions, 10158 flow [2024-01-31 16:52:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:52:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:52:55,888 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:52:55,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-01-31 16:52:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:56,099 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:52:56,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:52:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1728534687, now seen corresponding path program 113 times [2024-01-31 16:52:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:52:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370615049] [2024-01-31 16:52:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:52:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:52:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:52:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:52:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:52:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370615049] [2024-01-31 16:52:56,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370615049] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:52:56,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226372178] [2024-01-31 16:52:56,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:52:56,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:52:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:52:56,816 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:52:56,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-01-31 16:52:57,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:52:57,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:52:57,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:52:57,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:52:57,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:52:57,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:52:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:57,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:52:57,688 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:52:57,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:52:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:52:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226372178] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:52:57,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:52:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 29 [2024-01-31 16:52:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659458435] [2024-01-31 16:52:57,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:52:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:52:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:52:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:52:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:52:57,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:52:57,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 528 transitions, 10158 flow. Second operand has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 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 16:52:57,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:52:57,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:52:57,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:00,083 INFO L124 PetriNetUnfolderBase]: 2359/4409 cut-off events. [2024-01-31 16:53:00,083 INFO L125 PetriNetUnfolderBase]: For 680144/680144 co-relation queries the response was YES. [2024-01-31 16:53:00,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66610 conditions, 4409 events. 2359/4409 cut-off events. For 680144/680144 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31018 event pairs, 993 based on Foata normal form. 4/4413 useless extension candidates. Maximal degree in co-relation 66365. Up to 3865 conditions per place. [2024-01-31 16:53:00,177 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 483 selfloop transitions, 90 changer transitions 8/582 dead transitions. [2024-01-31 16:53:00,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 582 transitions, 12247 flow [2024-01-31 16:53:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 16:53:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 16:53:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 184 transitions. [2024-01-31 16:53:00,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-01-31 16:53:00,179 INFO L175 Difference]: Start difference. First operand has 562 places, 528 transitions, 10158 flow. Second operand 25 states and 184 transitions. [2024-01-31 16:53:00,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 582 transitions, 12247 flow [2024-01-31 16:53:03,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 582 transitions, 12151 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-01-31 16:53:03,876 INFO L231 Difference]: Finished difference. Result has 566 places, 524 transitions, 10193 flow [2024-01-31 16:53:03,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10040, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10193, PETRI_PLACES=566, PETRI_TRANSITIONS=524} [2024-01-31 16:53:03,877 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 543 predicate places. [2024-01-31 16:53:03,877 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 524 transitions, 10193 flow [2024-01-31 16:53:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.758620689655173) internal successors, (138), 29 states have internal predecessors, (138), 0 states have call successors, (0), 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 16:53:03,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:03,877 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:03,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2024-01-31 16:53:04,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:04,091 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:04,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:04,091 INFO L85 PathProgramCache]: Analyzing trace with hash 562675074, now seen corresponding path program 114 times [2024-01-31 16:53:04,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:04,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194758727] [2024-01-31 16:53:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:04,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194758727] [2024-01-31 16:53:04,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194758727] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977023993] [2024-01-31 16:53:04,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:04,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:04,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:04,526 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:04,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-01-31 16:53:05,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:53:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:05,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:53:05,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:05,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:05,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:53:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:05,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:05,273 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:53:05,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:53:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977023993] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:05,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-01-31 16:53:05,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401807935] [2024-01-31 16:53:05,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:53:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:53:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:53:05,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:05,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 524 transitions, 10193 flow. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 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 16:53:05,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:05,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:05,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:07,241 INFO L124 PetriNetUnfolderBase]: 2350/4399 cut-off events. [2024-01-31 16:53:07,241 INFO L125 PetriNetUnfolderBase]: For 680617/680617 co-relation queries the response was YES. [2024-01-31 16:53:07,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66710 conditions, 4399 events. 2350/4399 cut-off events. For 680617/680617 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30900 event pairs, 1076 based on Foata normal form. 8/4407 useless extension candidates. Maximal degree in co-relation 66465. Up to 4101 conditions per place. [2024-01-31 16:53:07,334 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 502 selfloop transitions, 59 changer transitions 8/570 dead transitions. [2024-01-31 16:53:07,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 570 transitions, 12047 flow [2024-01-31 16:53:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-01-31 16:53:07,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34096109839816935 [2024-01-31 16:53:07,335 INFO L175 Difference]: Start difference. First operand has 566 places, 524 transitions, 10193 flow. Second operand 19 states and 149 transitions. [2024-01-31 16:53:07,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 570 transitions, 12047 flow [2024-01-31 16:53:10,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 570 transitions, 11855 flow, removed 6 selfloop flow, removed 22 redundant places. [2024-01-31 16:53:10,947 INFO L231 Difference]: Finished difference. Result has 558 places, 522 transitions, 10108 flow [2024-01-31 16:53:10,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10005, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10108, PETRI_PLACES=558, PETRI_TRANSITIONS=522} [2024-01-31 16:53:10,948 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 535 predicate places. [2024-01-31 16:53:10,948 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 522 transitions, 10108 flow [2024-01-31 16:53:10,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 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 16:53:10,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:10,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:10,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2024-01-31 16:53:11,163 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:11,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1675230825, now seen corresponding path program 115 times [2024-01-31 16:53:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:11,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588352405] [2024-01-31 16:53:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:11,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:11,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588352405] [2024-01-31 16:53:11,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588352405] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:11,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931038879] [2024-01-31 16:53:11,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:11,622 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:11,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-01-31 16:53:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:12,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:12,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:12,261 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 16:53:12,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 9 [2024-01-31 16:53:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:12,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:12,376 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:53:12,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:53:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931038879] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:12,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:12,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:53:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224960182] [2024-01-31 16:53:12,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:53:12,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:53:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:53:12,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:12,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 522 transitions, 10108 flow. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 16:53:12,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:12,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:14,514 INFO L124 PetriNetUnfolderBase]: 2346/4372 cut-off events. [2024-01-31 16:53:14,514 INFO L125 PetriNetUnfolderBase]: For 678241/678241 co-relation queries the response was YES. [2024-01-31 16:53:14,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66410 conditions, 4372 events. 2346/4372 cut-off events. For 678241/678241 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30612 event pairs, 995 based on Foata normal form. 18/4390 useless extension candidates. Maximal degree in co-relation 66166. Up to 3991 conditions per place. [2024-01-31 16:53:14,608 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 515 selfloop transitions, 57 changer transitions 1/574 dead transitions. [2024-01-31 16:53:14,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 574 transitions, 12454 flow [2024-01-31 16:53:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:53:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:53:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 149 transitions. [2024-01-31 16:53:14,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35990338164251207 [2024-01-31 16:53:14,610 INFO L175 Difference]: Start difference. First operand has 558 places, 522 transitions, 10108 flow. Second operand 18 states and 149 transitions. [2024-01-31 16:53:14,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 574 transitions, 12454 flow [2024-01-31 16:53:18,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 574 transitions, 12309 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-01-31 16:53:18,358 INFO L231 Difference]: Finished difference. Result has 555 places, 522 transitions, 10120 flow [2024-01-31 16:53:18,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9956, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10120, PETRI_PLACES=555, PETRI_TRANSITIONS=522} [2024-01-31 16:53:18,359 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 532 predicate places. [2024-01-31 16:53:18,359 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 522 transitions, 10120 flow [2024-01-31 16:53:18,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 0 states have call successors, (0), 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 16:53:18,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:18,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:18,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:18,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-01-31 16:53:18,572 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:18,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:18,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1513007361, now seen corresponding path program 116 times [2024-01-31 16:53:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:18,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677159124] [2024-01-31 16:53:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:53:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677159124] [2024-01-31 16:53:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677159124] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744917873] [2024-01-31 16:53:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:53:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:19,263 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-01-31 16:53:19,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:53:19,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:19,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:53:19,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:19,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:19,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:53:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:53:19,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:20,057 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:53:20,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:53:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744917873] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:20,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 29 [2024-01-31 16:53:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113789642] [2024-01-31 16:53:20,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 16:53:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 16:53:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-01-31 16:53:20,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:20,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 522 transitions, 10120 flow. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:53:20,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:20,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:22,099 INFO L124 PetriNetUnfolderBase]: 2355/4414 cut-off events. [2024-01-31 16:53:22,099 INFO L125 PetriNetUnfolderBase]: For 714312/714312 co-relation queries the response was YES. [2024-01-31 16:53:22,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67107 conditions, 4414 events. 2355/4414 cut-off events. For 714312/714312 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31141 event pairs, 1032 based on Foata normal form. 30/4444 useless extension candidates. Maximal degree in co-relation 66863. Up to 4063 conditions per place. [2024-01-31 16:53:22,185 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 482 selfloop transitions, 74 changer transitions 4/561 dead transitions. [2024-01-31 16:53:22,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 561 transitions, 12278 flow [2024-01-31 16:53:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:53:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:53:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 158 transitions. [2024-01-31 16:53:22,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225296442687744 [2024-01-31 16:53:22,189 INFO L175 Difference]: Start difference. First operand has 555 places, 522 transitions, 10120 flow. Second operand 22 states and 158 transitions. [2024-01-31 16:53:22,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 561 transitions, 12278 flow [2024-01-31 16:53:25,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 561 transitions, 12122 flow, removed 26 selfloop flow, removed 15 redundant places. [2024-01-31 16:53:25,578 INFO L231 Difference]: Finished difference. Result has 561 places, 524 transitions, 10282 flow [2024-01-31 16:53:25,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9972, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10282, PETRI_PLACES=561, PETRI_TRANSITIONS=524} [2024-01-31 16:53:25,579 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 538 predicate places. [2024-01-31 16:53:25,579 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 524 transitions, 10282 flow [2024-01-31 16:53:25,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 29 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:53:25,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:25,579 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:25,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:25,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-01-31 16:53:25,792 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1232733766, now seen corresponding path program 117 times [2024-01-31 16:53:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745935767] [2024-01-31 16:53:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745935767] [2024-01-31 16:53:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745935767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877000930] [2024-01-31 16:53:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:53:26,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:26,285 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:26,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-01-31 16:53:26,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:53:26,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:26,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 52 conjunts are in the unsatisfiable core [2024-01-31 16:53:26,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:26,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:26,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:53:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:53:27,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:27,173 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:53:27,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:53:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:27,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877000930] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:27,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:27,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2024-01-31 16:53:27,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525389009] [2024-01-31 16:53:27,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:27,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:53:27,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:53:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:53:27,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:27,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 524 transitions, 10282 flow. Second operand has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:53:27,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:27,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:27,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:29,193 INFO L124 PetriNetUnfolderBase]: 2341/4389 cut-off events. [2024-01-31 16:53:29,193 INFO L125 PetriNetUnfolderBase]: For 698992/698992 co-relation queries the response was YES. [2024-01-31 16:53:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67255 conditions, 4389 events. 2341/4389 cut-off events. For 698992/698992 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 30879 event pairs, 450 based on Foata normal form. 8/4397 useless extension candidates. Maximal degree in co-relation 67008. Up to 4065 conditions per place. [2024-01-31 16:53:29,284 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 510 selfloop transitions, 63 changer transitions 5/579 dead transitions. [2024-01-31 16:53:29,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 579 transitions, 12476 flow [2024-01-31 16:53:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:53:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:53:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 174 transitions. [2024-01-31 16:53:29,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3438735177865613 [2024-01-31 16:53:29,285 INFO L175 Difference]: Start difference. First operand has 561 places, 524 transitions, 10282 flow. Second operand 22 states and 174 transitions. [2024-01-31 16:53:29,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 579 transitions, 12476 flow [2024-01-31 16:53:33,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 579 transitions, 12247 flow, removed 41 selfloop flow, removed 21 redundant places. [2024-01-31 16:53:33,014 INFO L231 Difference]: Finished difference. Result has 563 places, 523 transitions, 10245 flow [2024-01-31 16:53:33,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10028, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10245, PETRI_PLACES=563, PETRI_TRANSITIONS=523} [2024-01-31 16:53:33,015 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 540 predicate places. [2024-01-31 16:53:33,015 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 523 transitions, 10245 flow [2024-01-31 16:53:33,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.037037037037037) internal successors, (136), 27 states have internal predecessors, (136), 0 states have call successors, (0), 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 16:53:33,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:33,016 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:33,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:33,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-01-31 16:53:33,229 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:33,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:33,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1145842932, now seen corresponding path program 118 times [2024-01-31 16:53:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730409308] [2024-01-31 16:53:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730409308] [2024-01-31 16:53:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730409308] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146899169] [2024-01-31 16:53:33,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:53:33,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:33,698 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-01-31 16:53:34,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:53:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:34,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:34,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:34,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:34,523 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:53:34,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:53:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146899169] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:34,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:34,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-31 16:53:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189962362] [2024-01-31 16:53:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:53:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:53:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:53:34,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:34,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 523 transitions, 10245 flow. Second operand has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 16:53:34,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:34,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:34,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:36,314 INFO L124 PetriNetUnfolderBase]: 2319/4337 cut-off events. [2024-01-31 16:53:36,314 INFO L125 PetriNetUnfolderBase]: For 675493/675493 co-relation queries the response was YES. [2024-01-31 16:53:36,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65961 conditions, 4337 events. 2319/4337 cut-off events. For 675493/675493 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 30342 event pairs, 1063 based on Foata normal form. 8/4345 useless extension candidates. Maximal degree in co-relation 65715. Up to 4145 conditions per place. [2024-01-31 16:53:36,405 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 486 selfloop transitions, 42 changer transitions 13/542 dead transitions. [2024-01-31 16:53:36,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 542 transitions, 11458 flow [2024-01-31 16:53:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 112 transitions. [2024-01-31 16:53:36,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-31 16:53:36,407 INFO L175 Difference]: Start difference. First operand has 563 places, 523 transitions, 10245 flow. Second operand 16 states and 112 transitions. [2024-01-31 16:53:36,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 542 transitions, 11458 flow [2024-01-31 16:53:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 542 transitions, 11236 flow, removed 42 selfloop flow, removed 20 redundant places. [2024-01-31 16:53:40,119 INFO L231 Difference]: Finished difference. Result has 556 places, 517 transitions, 10027 flow [2024-01-31 16:53:40,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9998, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10027, PETRI_PLACES=556, PETRI_TRANSITIONS=517} [2024-01-31 16:53:40,120 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 533 predicate places. [2024-01-31 16:53:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 517 transitions, 10027 flow [2024-01-31 16:53:40,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.0) internal successors, (125), 25 states have internal predecessors, (125), 0 states have call successors, (0), 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 16:53:40,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:40,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:40,334 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1274884981, now seen corresponding path program 119 times [2024-01-31 16:53:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482044174] [2024-01-31 16:53:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:40,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:40,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482044174] [2024-01-31 16:53:40,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482044174] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143358126] [2024-01-31 16:53:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:53:40,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:40,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:40,827 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:40,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-01-31 16:53:41,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:53:41,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:41,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 16:53:41,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:41,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:41,672 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:53:41,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:53:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143358126] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:41,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:53:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326569336] [2024-01-31 16:53:41,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:41,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:53:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:53:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:53:41,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:41,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 517 transitions, 10027 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 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 16:53:41,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:41,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:43,389 INFO L124 PetriNetUnfolderBase]: 2307/4309 cut-off events. [2024-01-31 16:53:43,389 INFO L125 PetriNetUnfolderBase]: For 673652/673652 co-relation queries the response was YES. [2024-01-31 16:53:43,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65488 conditions, 4309 events. 2307/4309 cut-off events. For 673652/673652 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 30028 event pairs, 1063 based on Foata normal form. 4/4313 useless extension candidates. Maximal degree in co-relation 65242. Up to 4132 conditions per place. [2024-01-31 16:53:43,485 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 490 selfloop transitions, 36 changer transitions 15/542 dead transitions. [2024-01-31 16:53:43,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 542 transitions, 11586 flow [2024-01-31 16:53:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 108 transitions. [2024-01-31 16:53:43,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29347826086956524 [2024-01-31 16:53:43,487 INFO L175 Difference]: Start difference. First operand has 556 places, 517 transitions, 10027 flow. Second operand 16 states and 108 transitions. [2024-01-31 16:53:43,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 542 transitions, 11586 flow [2024-01-31 16:53:46,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 542 transitions, 11446 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-01-31 16:53:46,957 INFO L231 Difference]: Finished difference. Result has 556 places, 517 transitions, 9980 flow [2024-01-31 16:53:46,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9890, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9980, PETRI_PLACES=556, PETRI_TRANSITIONS=517} [2024-01-31 16:53:46,957 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 533 predicate places. [2024-01-31 16:53:46,957 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 517 transitions, 9980 flow [2024-01-31 16:53:46,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 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 16:53:46,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:46,958 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:46,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2024-01-31 16:53:47,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:47,171 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:47,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:47,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1079077025, now seen corresponding path program 120 times [2024-01-31 16:53:47,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:47,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926701701] [2024-01-31 16:53:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:47,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:47,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926701701] [2024-01-31 16:53:47,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926701701] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:47,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951256447] [2024-01-31 16:53:47,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:53:47,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:47,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:47,696 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-01-31 16:53:48,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:53:48,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:53:48,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:53:48,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:48,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:53:48,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:53:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:48,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:48,612 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:53:48,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:53:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:48,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951256447] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:48,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:48,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-31 16:53:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376815293] [2024-01-31 16:53:48,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:48,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:53:48,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:53:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:53:48,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:48,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 517 transitions, 9980 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:53:48,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:48,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:48,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:50,593 INFO L124 PetriNetUnfolderBase]: 2284/4224 cut-off events. [2024-01-31 16:53:50,593 INFO L125 PetriNetUnfolderBase]: For 692336/692336 co-relation queries the response was YES. [2024-01-31 16:53:50,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64742 conditions, 4224 events. 2284/4224 cut-off events. For 692336/692336 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29047 event pairs, 997 based on Foata normal form. 6/4230 useless extension candidates. Maximal degree in co-relation 64493. Up to 3965 conditions per place. [2024-01-31 16:53:50,680 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 482 selfloop transitions, 54 changer transitions 12/549 dead transitions. [2024-01-31 16:53:50,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 549 transitions, 11613 flow [2024-01-31 16:53:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:53:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:53:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 138 transitions. [2024-01-31 16:53:50,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2024-01-31 16:53:50,682 INFO L175 Difference]: Start difference. First operand has 556 places, 517 transitions, 9980 flow. Second operand 19 states and 138 transitions. [2024-01-31 16:53:50,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 549 transitions, 11613 flow [2024-01-31 16:53:54,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 549 transitions, 11473 flow, removed 27 selfloop flow, removed 16 redundant places. [2024-01-31 16:53:54,216 INFO L231 Difference]: Finished difference. Result has 553 places, 510 transitions, 9863 flow [2024-01-31 16:53:54,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9781, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9863, PETRI_PLACES=553, PETRI_TRANSITIONS=510} [2024-01-31 16:53:54,216 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 530 predicate places. [2024-01-31 16:53:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 510 transitions, 9863 flow [2024-01-31 16:53:54,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:53:54,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:53:54,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:53:54,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2024-01-31 16:53:54,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-01-31 16:53:54,418 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:53:54,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:53:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash 591454728, now seen corresponding path program 121 times [2024-01-31 16:53:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:53:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536768952] [2024-01-31 16:53:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:53:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:53:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:53:54,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536768952] [2024-01-31 16:53:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536768952] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:53:54,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343651209] [2024-01-31 16:53:54,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:53:54,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:53:54,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:53:54,916 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:53:54,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-01-31 16:53:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:53:55,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:53:55,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:53:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:55,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:53:55,689 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:53:55,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:53:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:53:55,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343651209] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:53:55,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:53:55,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-31 16:53:55,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553770321] [2024-01-31 16:53:55,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:53:55,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:53:55,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:53:55,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:53:55,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:53:55,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:53:55,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 510 transitions, 9863 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 16:53:55,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:53:55,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:53:55,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:53:57,396 INFO L124 PetriNetUnfolderBase]: 2256/4163 cut-off events. [2024-01-31 16:53:57,396 INFO L125 PetriNetUnfolderBase]: For 674004/674004 co-relation queries the response was YES. [2024-01-31 16:53:57,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63668 conditions, 4163 events. 2256/4163 cut-off events. For 674004/674004 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 28450 event pairs, 1020 based on Foata normal form. 8/4171 useless extension candidates. Maximal degree in co-relation 63423. Up to 3984 conditions per place. [2024-01-31 16:53:57,486 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 474 selfloop transitions, 41 changer transitions 13/529 dead transitions. [2024-01-31 16:53:57,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 529 transitions, 11062 flow [2024-01-31 16:53:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:53:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:53:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 112 transitions. [2024-01-31 16:53:57,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-31 16:53:57,487 INFO L175 Difference]: Start difference. First operand has 553 places, 510 transitions, 9863 flow. Second operand 16 states and 112 transitions. [2024-01-31 16:53:57,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 529 transitions, 11062 flow [2024-01-31 16:54:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 529 transitions, 10903 flow, removed 4 selfloop flow, removed 20 redundant places. [2024-01-31 16:54:01,541 INFO L231 Difference]: Finished difference. Result has 543 places, 504 transitions, 9730 flow [2024-01-31 16:54:01,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9687, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9730, PETRI_PLACES=543, PETRI_TRANSITIONS=504} [2024-01-31 16:54:01,542 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 520 predicate places. [2024-01-31 16:54:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 504 transitions, 9730 flow [2024-01-31 16:54:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 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 16:54:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:01,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2024-01-31 16:54:01,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-01-31 16:54:01,756 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:01,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 98369936, now seen corresponding path program 122 times [2024-01-31 16:54:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:01,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687102462] [2024-01-31 16:54:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:01,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687102462] [2024-01-31 16:54:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687102462] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741975702] [2024-01-31 16:54:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:54:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:02,903 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-01-31 16:54:03,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:54:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:03,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 16:54:03,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:03,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:03,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:54:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:54:03,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:03,798 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:54:03,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:54:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741975702] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:03,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:03,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 37 [2024-01-31 16:54:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43566029] [2024-01-31 16:54:03,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:03,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-31 16:54:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-31 16:54:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2024-01-31 16:54:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:03,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 504 transitions, 9730 flow. Second operand has 37 states, 37 states have (on average 4.675675675675675) internal successors, (173), 37 states have internal predecessors, (173), 0 states have call successors, (0), 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 16:54:03,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:03,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:03,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:06,235 INFO L124 PetriNetUnfolderBase]: 2297/4232 cut-off events. [2024-01-31 16:54:06,235 INFO L125 PetriNetUnfolderBase]: For 718310/718310 co-relation queries the response was YES. [2024-01-31 16:54:06,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66157 conditions, 4232 events. 2297/4232 cut-off events. For 718310/718310 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28788 event pairs, 953 based on Foata normal form. 24/4256 useless extension candidates. Maximal degree in co-relation 65913. Up to 3816 conditions per place. [2024-01-31 16:54:06,325 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 474 selfloop transitions, 89 changer transitions 3/567 dead transitions. [2024-01-31 16:54:06,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 567 transitions, 13484 flow [2024-01-31 16:54:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:54:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:54:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 224 transitions. [2024-01-31 16:54:06,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2951251646903821 [2024-01-31 16:54:06,327 INFO L175 Difference]: Start difference. First operand has 543 places, 504 transitions, 9730 flow. Second operand 33 states and 224 transitions. [2024-01-31 16:54:06,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 567 transitions, 13484 flow [2024-01-31 16:54:10,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 567 transitions, 13356 flow, removed 20 selfloop flow, removed 13 redundant places. [2024-01-31 16:54:10,100 INFO L231 Difference]: Finished difference. Result has 559 places, 516 transitions, 10501 flow [2024-01-31 16:54:10,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10501, PETRI_PLACES=559, PETRI_TRANSITIONS=516} [2024-01-31 16:54:10,101 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 536 predicate places. [2024-01-31 16:54:10,101 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 516 transitions, 10501 flow [2024-01-31 16:54:10,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.675675675675675) internal successors, (173), 37 states have internal predecessors, (173), 0 states have call successors, (0), 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 16:54:10,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:10,101 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:10,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2024-01-31 16:54:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:10,314 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:10,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1613014186, now seen corresponding path program 123 times [2024-01-31 16:54:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970843131] [2024-01-31 16:54:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970843131] [2024-01-31 16:54:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970843131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845206547] [2024-01-31 16:54:10,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:54:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:10,722 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:10,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-01-31 16:54:11,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:54:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:11,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:54:11,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:54:11,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:11,521 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:54:11,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:54:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:11,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845206547] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:11,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:11,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-01-31 16:54:11,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698593125] [2024-01-31 16:54:11,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:11,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:54:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:54:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:54:11,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:11,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 516 transitions, 10501 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:54:11,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:11,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:11,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:13,304 INFO L124 PetriNetUnfolderBase]: 2325/4280 cut-off events. [2024-01-31 16:54:13,304 INFO L125 PetriNetUnfolderBase]: For 762033/762033 co-relation queries the response was YES. [2024-01-31 16:54:13,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68313 conditions, 4280 events. 2325/4280 cut-off events. For 762033/762033 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29158 event pairs, 1028 based on Foata normal form. 8/4288 useless extension candidates. Maximal degree in co-relation 68065. Up to 4052 conditions per place. [2024-01-31 16:54:13,549 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 498 selfloop transitions, 50 changer transitions 0/549 dead transitions. [2024-01-31 16:54:13,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 549 transitions, 12873 flow [2024-01-31 16:54:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:54:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:54:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 126 transitions. [2024-01-31 16:54:13,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-01-31 16:54:13,551 INFO L175 Difference]: Start difference. First operand has 559 places, 516 transitions, 10501 flow. Second operand 18 states and 126 transitions. [2024-01-31 16:54:13,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 549 transitions, 12873 flow [2024-01-31 16:54:17,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 549 transitions, 12262 flow, removed 249 selfloop flow, removed 25 redundant places. [2024-01-31 16:54:17,723 INFO L231 Difference]: Finished difference. Result has 554 places, 521 transitions, 10174 flow [2024-01-31 16:54:17,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9891, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10174, PETRI_PLACES=554, PETRI_TRANSITIONS=521} [2024-01-31 16:54:17,724 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 531 predicate places. [2024-01-31 16:54:17,724 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 521 transitions, 10174 flow [2024-01-31 16:54:17,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 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 16:54:17,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:17,724 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:17,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:17,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:17,937 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:17,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 728127364, now seen corresponding path program 124 times [2024-01-31 16:54:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:17,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699501383] [2024-01-31 16:54:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 16:54:18,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699501383] [2024-01-31 16:54:18,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699501383] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360328900] [2024-01-31 16:54:18,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:54:18,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:18,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:18,762 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:18,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-01-31 16:54:19,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:54:19,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:19,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:54:19,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:19,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:19,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:54:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:19,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:19,635 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:54:19,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:54:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360328900] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:19,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 30 [2024-01-31 16:54:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432533335] [2024-01-31 16:54:19,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:19,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:54:19,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:54:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:54:19,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:19,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 521 transitions, 10174 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:54:19,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:19,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:19,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:22,010 INFO L124 PetriNetUnfolderBase]: 2349/4306 cut-off events. [2024-01-31 16:54:22,010 INFO L125 PetriNetUnfolderBase]: For 748305/748305 co-relation queries the response was YES. [2024-01-31 16:54:22,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68267 conditions, 4306 events. 2349/4306 cut-off events. For 748305/748305 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29285 event pairs, 983 based on Foata normal form. 8/4312 useless extension candidates. Maximal degree in co-relation 68016. Up to 3958 conditions per place. [2024-01-31 16:54:22,096 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 474 selfloop transitions, 89 changer transitions 4/568 dead transitions. [2024-01-31 16:54:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 568 transitions, 13221 flow [2024-01-31 16:54:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:54:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:54:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 187 transitions. [2024-01-31 16:54:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29037267080745344 [2024-01-31 16:54:22,097 INFO L175 Difference]: Start difference. First operand has 554 places, 521 transitions, 10174 flow. Second operand 28 states and 187 transitions. [2024-01-31 16:54:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 568 transitions, 13221 flow [2024-01-31 16:54:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 568 transitions, 13097 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-01-31 16:54:26,518 INFO L231 Difference]: Finished difference. Result has 566 places, 527 transitions, 10549 flow [2024-01-31 16:54:26,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10045, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10549, PETRI_PLACES=566, PETRI_TRANSITIONS=527} [2024-01-31 16:54:26,519 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 543 predicate places. [2024-01-31 16:54:26,519 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 527 transitions, 10549 flow [2024-01-31 16:54:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:54:26,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:26,520 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:26,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2024-01-31 16:54:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:26,724 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:26,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1476995828, now seen corresponding path program 125 times [2024-01-31 16:54:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:26,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703194920] [2024-01-31 16:54:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:27,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703194920] [2024-01-31 16:54:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703194920] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860930298] [2024-01-31 16:54:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:54:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:27,180 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:27,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-01-31 16:54:27,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:54:27,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:27,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:54:27,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:27,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:28,055 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:54:28,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:54:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:28,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860930298] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:28,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:28,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:54:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759243076] [2024-01-31 16:54:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:54:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:54:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:54:28,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:28,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 527 transitions, 10549 flow. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:54:28,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:28,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:28,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:30,082 INFO L124 PetriNetUnfolderBase]: 2376/4352 cut-off events. [2024-01-31 16:54:30,082 INFO L125 PetriNetUnfolderBase]: For 777016/777016 co-relation queries the response was YES. [2024-01-31 16:54:30,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69870 conditions, 4352 events. 2376/4352 cut-off events. For 777016/777016 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29682 event pairs, 976 based on Foata normal form. 8/4358 useless extension candidates. Maximal degree in co-relation 69618. Up to 3971 conditions per place. [2024-01-31 16:54:30,171 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 520 selfloop transitions, 56 changer transitions 4/581 dead transitions. [2024-01-31 16:54:30,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 581 transitions, 13515 flow [2024-01-31 16:54:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:54:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:54:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 154 transitions. [2024-01-31 16:54:30,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524027459954233 [2024-01-31 16:54:30,172 INFO L175 Difference]: Start difference. First operand has 566 places, 527 transitions, 10549 flow. Second operand 19 states and 154 transitions. [2024-01-31 16:54:30,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 581 transitions, 13515 flow [2024-01-31 16:54:34,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 581 transitions, 13165 flow, removed 90 selfloop flow, removed 25 redundant places. [2024-01-31 16:54:34,233 INFO L231 Difference]: Finished difference. Result has 559 places, 530 transitions, 10506 flow [2024-01-31 16:54:34,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10199, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10506, PETRI_PLACES=559, PETRI_TRANSITIONS=530} [2024-01-31 16:54:34,233 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 536 predicate places. [2024-01-31 16:54:34,234 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 530 transitions, 10506 flow [2024-01-31 16:54:34,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:54:34,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:34,234 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:34,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:34,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-01-31 16:54:34,444 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:34,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash -224377738, now seen corresponding path program 126 times [2024-01-31 16:54:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262289849] [2024-01-31 16:54:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262289849] [2024-01-31 16:54:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262289849] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281616379] [2024-01-31 16:54:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:54:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:34,921 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:34,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-01-31 16:54:35,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:54:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:35,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 16:54:35,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:35,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:35,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:54:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:54:35,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:35,647 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:54:35,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:54:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:35,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281616379] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:35,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-01-31 16:54:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992238227] [2024-01-31 16:54:35,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:54:35,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:54:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:54:35,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:35,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 530 transitions, 10506 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:54:35,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:35,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:35,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:37,866 INFO L124 PetriNetUnfolderBase]: 2414/4437 cut-off events. [2024-01-31 16:54:37,866 INFO L125 PetriNetUnfolderBase]: For 817380/817380 co-relation queries the response was YES. [2024-01-31 16:54:37,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72141 conditions, 4437 events. 2414/4437 cut-off events. For 817380/817380 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30495 event pairs, 954 based on Foata normal form. 8/4443 useless extension candidates. Maximal degree in co-relation 71889. Up to 3902 conditions per place. [2024-01-31 16:54:37,959 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 519 selfloop transitions, 84 changer transitions 6/610 dead transitions. [2024-01-31 16:54:37,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 610 transitions, 14319 flow [2024-01-31 16:54:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:54:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:54:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 195 transitions. [2024-01-31 16:54:37,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532608695652174 [2024-01-31 16:54:37,961 INFO L175 Difference]: Start difference. First operand has 559 places, 530 transitions, 10506 flow. Second operand 24 states and 195 transitions. [2024-01-31 16:54:37,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 610 transitions, 14319 flow [2024-01-31 16:54:42,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 610 transitions, 14117 flow, removed 69 selfloop flow, removed 14 redundant places. [2024-01-31 16:54:42,367 INFO L231 Difference]: Finished difference. Result has 572 places, 539 transitions, 11021 flow [2024-01-31 16:54:42,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10366, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11021, PETRI_PLACES=572, PETRI_TRANSITIONS=539} [2024-01-31 16:54:42,368 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 549 predicate places. [2024-01-31 16:54:42,368 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 539 transitions, 11021 flow [2024-01-31 16:54:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:54:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:42,369 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:42,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-01-31 16:54:42,583 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:42,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:42,583 INFO L85 PathProgramCache]: Analyzing trace with hash -856238704, now seen corresponding path program 127 times [2024-01-31 16:54:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:42,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835495531] [2024-01-31 16:54:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:54:43,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835495531] [2024-01-31 16:54:43,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835495531] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747898408] [2024-01-31 16:54:43,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:54:43,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:43,458 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:43,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-01-31 16:54:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:44,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:54:44,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:44,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:44,264 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:54:44,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:54:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:44,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747898408] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:44,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:44,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 35 [2024-01-31 16:54:44,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827896000] [2024-01-31 16:54:44,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:44,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:54:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:54:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:54:44,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:44,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 539 transitions, 11021 flow. Second operand has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 35 states have internal predecessors, (159), 0 states have call successors, (0), 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 16:54:44,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:44,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:44,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:46,360 INFO L124 PetriNetUnfolderBase]: 2448/4498 cut-off events. [2024-01-31 16:54:46,360 INFO L125 PetriNetUnfolderBase]: For 868031/868031 co-relation queries the response was YES. [2024-01-31 16:54:46,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74873 conditions, 4498 events. 2448/4498 cut-off events. For 868031/868031 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30995 event pairs, 1057 based on Foata normal form. 8/4504 useless extension candidates. Maximal degree in co-relation 74615. Up to 4190 conditions per place. [2024-01-31 16:54:46,456 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 514 selfloop transitions, 66 changer transitions 0/581 dead transitions. [2024-01-31 16:54:46,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 581 transitions, 13926 flow [2024-01-31 16:54:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:54:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:54:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 159 transitions. [2024-01-31 16:54:46,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3005671077504726 [2024-01-31 16:54:46,458 INFO L175 Difference]: Start difference. First operand has 572 places, 539 transitions, 11021 flow. Second operand 23 states and 159 transitions. [2024-01-31 16:54:46,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 581 transitions, 13926 flow [2024-01-31 16:54:50,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 581 transitions, 13526 flow, removed 137 selfloop flow, removed 16 redundant places. [2024-01-31 16:54:50,985 INFO L231 Difference]: Finished difference. Result has 582 places, 544 transitions, 10997 flow [2024-01-31 16:54:50,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10622, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10997, PETRI_PLACES=582, PETRI_TRANSITIONS=544} [2024-01-31 16:54:50,998 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 559 predicate places. [2024-01-31 16:54:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 544 transitions, 10997 flow [2024-01-31 16:54:51,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.542857142857143) internal successors, (159), 35 states have internal predecessors, (159), 0 states have call successors, (0), 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 16:54:51,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:54:51,008 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:54:51,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2024-01-31 16:54:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2024-01-31 16:54:51,221 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:54:51,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:54:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 635256208, now seen corresponding path program 128 times [2024-01-31 16:54:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:54:51,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196574305] [2024-01-31 16:54:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:54:51,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:54:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:54:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:51,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:54:51,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196574305] [2024-01-31 16:54:51,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196574305] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:54:51,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272942777] [2024-01-31 16:54:51,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:54:51,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:54:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:54:51,671 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:54:51,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-01-31 16:54:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:54:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:54:52,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 16:54:52,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:54:52,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:54:52,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:54:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:54:52,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:54:52,654 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:54:52,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:54:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:54:52,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272942777] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:54:52,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:54:52,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2024-01-31 16:54:52,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169138747] [2024-01-31 16:54:52,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:54:52,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 16:54:52,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:54:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 16:54:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2024-01-31 16:54:52,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:54:52,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 544 transitions, 10997 flow. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 16:54:52,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:54:52,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:54:52,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:54:55,563 INFO L124 PetriNetUnfolderBase]: 2578/4774 cut-off events. [2024-01-31 16:54:55,563 INFO L125 PetriNetUnfolderBase]: For 989239/989239 co-relation queries the response was YES. [2024-01-31 16:54:55,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81293 conditions, 4774 events. 2578/4774 cut-off events. For 989239/989239 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33689 event pairs, 820 based on Foata normal form. 10/4782 useless extension candidates. Maximal degree in co-relation 81030. Up to 4237 conditions per place. [2024-01-31 16:54:55,660 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 565 selfloop transitions, 85 changer transitions 11/662 dead transitions. [2024-01-31 16:54:55,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 662 transitions, 15714 flow [2024-01-31 16:54:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:54:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:54:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 241 transitions. [2024-01-31 16:54:55,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38808373590982287 [2024-01-31 16:54:55,676 INFO L175 Difference]: Start difference. First operand has 582 places, 544 transitions, 10997 flow. Second operand 27 states and 241 transitions. [2024-01-31 16:54:55,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 662 transitions, 15714 flow [2024-01-31 16:55:00,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 662 transitions, 15516 flow, removed 49 selfloop flow, removed 18 redundant places. [2024-01-31 16:55:00,936 INFO L231 Difference]: Finished difference. Result has 602 places, 570 transitions, 12277 flow [2024-01-31 16:55:00,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10799, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12277, PETRI_PLACES=602, PETRI_TRANSITIONS=570} [2024-01-31 16:55:00,937 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 579 predicate places. [2024-01-31 16:55:00,937 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 570 transitions, 12277 flow [2024-01-31 16:55:00,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 16:55:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:00,937 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:00,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2024-01-31 16:55:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2024-01-31 16:55:01,150 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:01,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 815134894, now seen corresponding path program 129 times [2024-01-31 16:55:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574518852] [2024-01-31 16:55:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:55:01,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:01,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574518852] [2024-01-31 16:55:01,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574518852] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:01,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212813461] [2024-01-31 16:55:01,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:55:01,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:01,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:01,788 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:01,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-01-31 16:55:02,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:55:02,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:02,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:55:02,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:02,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:02,592 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:55:02,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:55:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:02,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212813461] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:02,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:02,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 27 [2024-01-31 16:55:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746813048] [2024-01-31 16:55:02,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:02,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:55:02,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:55:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:55:02,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:55:02,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 570 transitions, 12277 flow. Second operand has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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 16:55:02,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:02,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:55:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:05,007 INFO L124 PetriNetUnfolderBase]: 2657/4916 cut-off events. [2024-01-31 16:55:05,007 INFO L125 PetriNetUnfolderBase]: For 1136452/1136452 co-relation queries the response was YES. [2024-01-31 16:55:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87251 conditions, 4916 events. 2657/4916 cut-off events. For 1136452/1136452 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34778 event pairs, 1116 based on Foata normal form. 22/4936 useless extension candidates. Maximal degree in co-relation 86978. Up to 4415 conditions per place. [2024-01-31 16:55:05,127 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 552 selfloop transitions, 84 changer transitions 10/647 dead transitions. [2024-01-31 16:55:05,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 647 transitions, 16233 flow [2024-01-31 16:55:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:55:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:55:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 190 transitions. [2024-01-31 16:55:05,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442028985507246 [2024-01-31 16:55:05,128 INFO L175 Difference]: Start difference. First operand has 602 places, 570 transitions, 12277 flow. Second operand 24 states and 190 transitions. [2024-01-31 16:55:05,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 647 transitions, 16233 flow [2024-01-31 16:55:12,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 647 transitions, 15470 flow, removed 353 selfloop flow, removed 10 redundant places. [2024-01-31 16:55:12,286 INFO L231 Difference]: Finished difference. Result has 621 places, 584 transitions, 12366 flow [2024-01-31 16:55:12,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11514, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12366, PETRI_PLACES=621, PETRI_TRANSITIONS=584} [2024-01-31 16:55:12,287 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 598 predicate places. [2024-01-31 16:55:12,287 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 584 transitions, 12366 flow [2024-01-31 16:55:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.888888888888889) internal successors, (132), 27 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 16:55:12,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:12,287 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:12,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2024-01-31 16:55:12,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:12,500 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:12,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1023177384, now seen corresponding path program 130 times [2024-01-31 16:55:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:12,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398889881] [2024-01-31 16:55:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:12,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398889881] [2024-01-31 16:55:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398889881] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832050461] [2024-01-31 16:55:12,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:55:12,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:12,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:12,959 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:12,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-01-31 16:55:13,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:55:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:13,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:55:13,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:13,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:13,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:55:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:13,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:13,817 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:55:13,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:55:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832050461] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:13,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:13,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-01-31 16:55:13,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805638936] [2024-01-31 16:55:13,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:55:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:55:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:55:13,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:55:13,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 584 transitions, 12366 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:55:13,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:13,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:55:13,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:16,193 INFO L124 PetriNetUnfolderBase]: 2685/4974 cut-off events. [2024-01-31 16:55:16,194 INFO L125 PetriNetUnfolderBase]: For 1169291/1169291 co-relation queries the response was YES. [2024-01-31 16:55:16,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88769 conditions, 4974 events. 2685/4974 cut-off events. For 1169291/1169291 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35516 event pairs, 996 based on Foata normal form. 4/4976 useless extension candidates. Maximal degree in co-relation 88487. Up to 4186 conditions per place. [2024-01-31 16:55:16,312 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 533 selfloop transitions, 97 changer transitions 1/632 dead transitions. [2024-01-31 16:55:16,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 632 transitions, 15434 flow [2024-01-31 16:55:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:55:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:55:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2024-01-31 16:55:16,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35038363171355497 [2024-01-31 16:55:16,313 INFO L175 Difference]: Start difference. First operand has 621 places, 584 transitions, 12366 flow. Second operand 17 states and 137 transitions. [2024-01-31 16:55:16,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 632 transitions, 15434 flow [2024-01-31 16:55:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 632 transitions, 15086 flow, removed 131 selfloop flow, removed 14 redundant places. [2024-01-31 16:55:22,732 INFO L231 Difference]: Finished difference. Result has 626 places, 589 transitions, 12608 flow [2024-01-31 16:55:22,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12018, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12608, PETRI_PLACES=626, PETRI_TRANSITIONS=589} [2024-01-31 16:55:22,733 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 603 predicate places. [2024-01-31 16:55:22,733 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 589 transitions, 12608 flow [2024-01-31 16:55:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:55:22,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:22,733 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:22,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2024-01-31 16:55:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2024-01-31 16:55:22,946 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:22,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -142173778, now seen corresponding path program 131 times [2024-01-31 16:55:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713916139] [2024-01-31 16:55:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:23,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713916139] [2024-01-31 16:55:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713916139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572270437] [2024-01-31 16:55:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:55:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:23,841 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:23,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-01-31 16:55:24,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:55:24,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:24,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:55:24,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:24,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:55:24,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-31 16:55:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:24,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:24,715 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:55:24,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:55:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:24,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572270437] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:24,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:24,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 37 [2024-01-31 16:55:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215103988] [2024-01-31 16:55:24,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-31 16:55:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-31 16:55:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2024-01-31 16:55:24,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:55:24,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 589 transitions, 12608 flow. Second operand has 37 states, 37 states have (on average 4.837837837837838) internal successors, (179), 37 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:55:24,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:24,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:55:24,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:27,619 INFO L124 PetriNetUnfolderBase]: 2684/5003 cut-off events. [2024-01-31 16:55:27,620 INFO L125 PetriNetUnfolderBase]: For 1194198/1194198 co-relation queries the response was YES. [2024-01-31 16:55:27,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89504 conditions, 5003 events. 2684/5003 cut-off events. For 1194198/1194198 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35940 event pairs, 1136 based on Foata normal form. 36/5037 useless extension candidates. Maximal degree in co-relation 89218. Up to 4467 conditions per place. [2024-01-31 16:55:27,739 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 560 selfloop transitions, 89 changer transitions 17/667 dead transitions. [2024-01-31 16:55:27,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 667 transitions, 16977 flow [2024-01-31 16:55:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:55:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:55:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 225 transitions. [2024-01-31 16:55:27,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-31 16:55:27,740 INFO L175 Difference]: Start difference. First operand has 626 places, 589 transitions, 12608 flow. Second operand 30 states and 225 transitions. [2024-01-31 16:55:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 667 transitions, 16977 flow [2024-01-31 16:55:34,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 667 transitions, 16567 flow, removed 142 selfloop flow, removed 12 redundant places. [2024-01-31 16:55:34,176 INFO L231 Difference]: Finished difference. Result has 649 places, 595 transitions, 13058 flow [2024-01-31 16:55:34,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12140, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=13058, PETRI_PLACES=649, PETRI_TRANSITIONS=595} [2024-01-31 16:55:34,176 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 626 predicate places. [2024-01-31 16:55:34,176 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 595 transitions, 13058 flow [2024-01-31 16:55:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.837837837837838) internal successors, (179), 37 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:55:34,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:34,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:34,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2024-01-31 16:55:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:34,390 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:34,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1924218858, now seen corresponding path program 132 times [2024-01-31 16:55:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607471374] [2024-01-31 16:55:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:55:35,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:35,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607471374] [2024-01-31 16:55:35,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607471374] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:35,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312622375] [2024-01-31 16:55:35,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:55:35,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:35,499 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:35,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2024-01-31 16:55:36,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:55:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:55:36,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:55:36,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:36,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:36,369 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:55:36,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:55:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:36,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312622375] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:36,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:36,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 35 [2024-01-31 16:55:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53862019] [2024-01-31 16:55:36,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:55:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:55:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:55:36,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:55:36,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 595 transitions, 13058 flow. Second operand has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:55:36,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:36,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:55:36,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:39,591 INFO L124 PetriNetUnfolderBase]: 2675/5015 cut-off events. [2024-01-31 16:55:39,591 INFO L125 PetriNetUnfolderBase]: For 1255220/1255220 co-relation queries the response was YES. [2024-01-31 16:55:39,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91501 conditions, 5015 events. 2675/5015 cut-off events. For 1255220/1255220 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 36113 event pairs, 1163 based on Foata normal form. 12/5025 useless extension candidates. Maximal degree in co-relation 91209. Up to 4616 conditions per place. [2024-01-31 16:55:39,701 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 575 selfloop transitions, 78 changer transitions 30/684 dead transitions. [2024-01-31 16:55:39,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 684 transitions, 16637 flow [2024-01-31 16:55:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:55:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:55:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 262 transitions. [2024-01-31 16:55:39,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3078730904817861 [2024-01-31 16:55:39,702 INFO L175 Difference]: Start difference. First operand has 649 places, 595 transitions, 13058 flow. Second operand 37 states and 262 transitions. [2024-01-31 16:55:39,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 684 transitions, 16637 flow [2024-01-31 16:55:46,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 664 places, 684 transitions, 15886 flow, removed 337 selfloop flow, removed 17 redundant places. [2024-01-31 16:55:46,456 INFO L231 Difference]: Finished difference. Result has 672 places, 606 transitions, 13281 flow [2024-01-31 16:55:46,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12313, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13281, PETRI_PLACES=672, PETRI_TRANSITIONS=606} [2024-01-31 16:55:46,457 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2024-01-31 16:55:46,457 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 606 transitions, 13281 flow [2024-01-31 16:55:46,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.771428571428571) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 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 16:55:46,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:46,457 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:46,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2024-01-31 16:55:46,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:46,670 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:55:46,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:55:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 308788628, now seen corresponding path program 133 times [2024-01-31 16:55:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:55:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064434599] [2024-01-31 16:55:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:55:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:55:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 16:55:47,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:55:47,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064434599] [2024-01-31 16:55:47,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064434599] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:55:47,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119928627] [2024-01-31 16:55:47,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:55:47,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:55:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:55:47,317 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:55:47,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2024-01-31 16:55:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:55:47,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 16:55:47,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:55:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:48,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:55:48,145 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:55:48,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:55:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:55:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119928627] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:55:48,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:55:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-01-31 16:55:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108698708] [2024-01-31 16:55:48,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:55:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 16:55:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:55:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 16:55:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-01-31 16:55:48,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:55:48,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 606 transitions, 13281 flow. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:55:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:55:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:55:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:55:50,707 INFO L124 PetriNetUnfolderBase]: 2686/5015 cut-off events. [2024-01-31 16:55:50,708 INFO L125 PetriNetUnfolderBase]: For 1378101/1378101 co-relation queries the response was YES. [2024-01-31 16:55:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93987 conditions, 5015 events. 2686/5015 cut-off events. For 1378101/1378101 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35869 event pairs, 1168 based on Foata normal form. 8/5021 useless extension candidates. Maximal degree in co-relation 93685. Up to 4661 conditions per place. [2024-01-31 16:55:50,829 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 568 selfloop transitions, 76 changer transitions 0/645 dead transitions. [2024-01-31 16:55:50,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 645 transitions, 16506 flow [2024-01-31 16:55:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:55:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:55:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 162 transitions. [2024-01-31 16:55:50,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29347826086956524 [2024-01-31 16:55:50,831 INFO L175 Difference]: Start difference. First operand has 672 places, 606 transitions, 13281 flow. Second operand 24 states and 162 transitions. [2024-01-31 16:55:50,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 645 transitions, 16506 flow [2024-01-31 16:55:59,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 666 places, 645 transitions, 15565 flow, removed 402 selfloop flow, removed 25 redundant places. [2024-01-31 16:55:59,862 INFO L231 Difference]: Finished difference. Result has 669 places, 612 transitions, 12847 flow [2024-01-31 16:55:59,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12342, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12847, PETRI_PLACES=669, PETRI_TRANSITIONS=612} [2024-01-31 16:55:59,863 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 646 predicate places. [2024-01-31 16:55:59,863 INFO L495 AbstractCegarLoop]: Abstraction has has 669 places, 612 transitions, 12847 flow [2024-01-31 16:55:59,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 16:55:59,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:55:59,863 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:55:59,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2024-01-31 16:56:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:00,076 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:00,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1832116682, now seen corresponding path program 134 times [2024-01-31 16:56:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895078910] [2024-01-31 16:56:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:00,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895078910] [2024-01-31 16:56:00,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895078910] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:00,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057044358] [2024-01-31 16:56:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:56:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:00,572 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:00,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2024-01-31 16:56:01,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:56:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:01,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 16:56:01,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:01,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:01,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:56:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:56:01,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:01,415 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:56:01,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:56:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057044358] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:01,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:56:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594300307] [2024-01-31 16:56:01,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:56:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:56:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:56:01,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:56:01,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 669 places, 612 transitions, 12847 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:56:01,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:01,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:56:01,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:04,190 INFO L124 PetriNetUnfolderBase]: 2721/5105 cut-off events. [2024-01-31 16:56:04,191 INFO L125 PetriNetUnfolderBase]: For 1446172/1446172 co-relation queries the response was YES. [2024-01-31 16:56:04,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96495 conditions, 5105 events. 2721/5105 cut-off events. For 1446172/1446172 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37027 event pairs, 872 based on Foata normal form. 36/5139 useless extension candidates. Maximal degree in co-relation 96192. Up to 3906 conditions per place. [2024-01-31 16:56:04,308 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 530 selfloop transitions, 154 changer transitions 17/702 dead transitions. [2024-01-31 16:56:04,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 702 transitions, 18374 flow [2024-01-31 16:56:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:56:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:56:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 234 transitions. [2024-01-31 16:56:04,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391304347826087 [2024-01-31 16:56:04,310 INFO L175 Difference]: Start difference. First operand has 669 places, 612 transitions, 12847 flow. Second operand 30 states and 234 transitions. [2024-01-31 16:56:04,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 702 transitions, 18374 flow [2024-01-31 16:56:11,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 702 transitions, 18007 flow, removed 106 selfloop flow, removed 21 redundant places. [2024-01-31 16:56:11,965 INFO L231 Difference]: Finished difference. Result has 684 places, 624 transitions, 14029 flow [2024-01-31 16:56:11,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12486, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=14029, PETRI_PLACES=684, PETRI_TRANSITIONS=624} [2024-01-31 16:56:11,966 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 661 predicate places. [2024-01-31 16:56:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 624 transitions, 14029 flow [2024-01-31 16:56:11,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:56:11,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:11,966 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:11,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:12,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:12,179 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:12,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1834111122, now seen corresponding path program 135 times [2024-01-31 16:56:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:12,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052590534] [2024-01-31 16:56:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:12,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052590534] [2024-01-31 16:56:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052590534] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436386134] [2024-01-31 16:56:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:56:12,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:12,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:12,599 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:12,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2024-01-31 16:56:13,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 16:56:13,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:13,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 16:56:13,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:13,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:13,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-01-31 16:56:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:56:13,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:13,469 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:56:13,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:56:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:13,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436386134] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:13,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:13,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2024-01-31 16:56:13,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767870470] [2024-01-31 16:56:13,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:13,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:56:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:56:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:56:13,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:56:13,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 624 transitions, 14029 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:56:13,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:13,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:56:13,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:16,007 INFO L124 PetriNetUnfolderBase]: 2720/5101 cut-off events. [2024-01-31 16:56:16,008 INFO L125 PetriNetUnfolderBase]: For 1571450/1571450 co-relation queries the response was YES. [2024-01-31 16:56:16,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99563 conditions, 5101 events. 2720/5101 cut-off events. For 1571450/1571450 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36949 event pairs, 930 based on Foata normal form. 12/5111 useless extension candidates. Maximal degree in co-relation 99254. Up to 4054 conditions per place. [2024-01-31 16:56:16,135 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 544 selfloop transitions, 127 changer transitions 2/674 dead transitions. [2024-01-31 16:56:16,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 674 transitions, 16885 flow [2024-01-31 16:56:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:56:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:56:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 165 transitions. [2024-01-31 16:56:16,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-01-31 16:56:16,136 INFO L175 Difference]: Start difference. First operand has 684 places, 624 transitions, 14029 flow. Second operand 20 states and 165 transitions. [2024-01-31 16:56:16,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 674 transitions, 16885 flow [2024-01-31 16:56:24,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 674 transitions, 15666 flow, removed 508 selfloop flow, removed 28 redundant places. [2024-01-31 16:56:24,634 INFO L231 Difference]: Finished difference. Result has 672 places, 624 transitions, 13209 flow [2024-01-31 16:56:24,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12784, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13209, PETRI_PLACES=672, PETRI_TRANSITIONS=624} [2024-01-31 16:56:24,634 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2024-01-31 16:56:24,635 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 624 transitions, 13209 flow [2024-01-31 16:56:24,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 16:56:24,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:24,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:24,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2024-01-31 16:56:24,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2024-01-31 16:56:24,844 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:24,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -155743434, now seen corresponding path program 136 times [2024-01-31 16:56:24,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:24,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853423229] [2024-01-31 16:56:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:24,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:25,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853423229] [2024-01-31 16:56:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853423229] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208589113] [2024-01-31 16:56:25,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:56:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:25,311 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:25,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2024-01-31 16:56:25,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:56:25,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:25,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:56:25,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:26,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:26,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:56:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:26,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:26,190 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:56:26,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:56:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:26,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208589113] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:26,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:26,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:56:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93555264] [2024-01-31 16:56:26,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:56:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:56:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:56:26,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:56:26,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 624 transitions, 13209 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:56:26,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:26,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:56:26,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:29,121 INFO L124 PetriNetUnfolderBase]: 2768/5181 cut-off events. [2024-01-31 16:56:29,121 INFO L125 PetriNetUnfolderBase]: For 1566285/1566285 co-relation queries the response was YES. [2024-01-31 16:56:29,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100738 conditions, 5181 events. 2768/5181 cut-off events. For 1566285/1566285 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37410 event pairs, 1139 based on Foata normal form. 16/5195 useless extension candidates. Maximal degree in co-relation 100437. Up to 4629 conditions per place. [2024-01-31 16:56:29,250 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 604 selfloop transitions, 86 changer transitions 4/695 dead transitions. [2024-01-31 16:56:29,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 695 transitions, 17747 flow [2024-01-31 16:56:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:56:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:56:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2024-01-31 16:56:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3311036789297659 [2024-01-31 16:56:29,251 INFO L175 Difference]: Start difference. First operand has 672 places, 624 transitions, 13209 flow. Second operand 26 states and 198 transitions. [2024-01-31 16:56:29,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 695 transitions, 17747 flow [2024-01-31 16:56:38,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 695 transitions, 17375 flow, removed 62 selfloop flow, removed 20 redundant places. [2024-01-31 16:56:38,554 INFO L231 Difference]: Finished difference. Result has 679 places, 633 transitions, 13667 flow [2024-01-31 16:56:38,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12820, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13667, PETRI_PLACES=679, PETRI_TRANSITIONS=633} [2024-01-31 16:56:38,555 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 656 predicate places. [2024-01-31 16:56:38,555 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 633 transitions, 13667 flow [2024-01-31 16:56:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:56:38,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:38,555 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:38,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2024-01-31 16:56:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2024-01-31 16:56:38,769 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:38,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash -847878730, now seen corresponding path program 137 times [2024-01-31 16:56:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:38,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811098734] [2024-01-31 16:56:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:39,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:39,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811098734] [2024-01-31 16:56:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811098734] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649669216] [2024-01-31 16:56:39,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:56:39,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:39,192 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:39,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2024-01-31 16:56:39,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:56:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:39,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 16:56:39,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:39,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:56:39,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 16:56:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:40,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:40,115 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:56:40,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:56:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649669216] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:40,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-31 16:56:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066084539] [2024-01-31 16:56:40,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:56:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:56:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:56:40,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:56:40,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 633 transitions, 13667 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:56:40,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:40,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:56:40,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:42,985 INFO L124 PetriNetUnfolderBase]: 2788/5249 cut-off events. [2024-01-31 16:56:42,985 INFO L125 PetriNetUnfolderBase]: For 1574731/1574731 co-relation queries the response was YES. [2024-01-31 16:56:43,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101938 conditions, 5249 events. 2788/5249 cut-off events. For 1574731/1574731 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 38232 event pairs, 1191 based on Foata normal form. 16/5263 useless extension candidates. Maximal degree in co-relation 101636. Up to 4756 conditions per place. [2024-01-31 16:56:43,114 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 626 selfloop transitions, 63 changer transitions 2/692 dead transitions. [2024-01-31 16:56:43,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 692 transitions, 17000 flow [2024-01-31 16:56:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:56:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:56:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-01-31 16:56:43,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938618925831202 [2024-01-31 16:56:43,115 INFO L175 Difference]: Start difference. First operand has 679 places, 633 transitions, 13667 flow. Second operand 17 states and 154 transitions. [2024-01-31 16:56:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 692 transitions, 17000 flow [2024-01-31 16:56:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 692 transitions, 16438 flow, removed 218 selfloop flow, removed 17 redundant places. [2024-01-31 16:56:52,477 INFO L231 Difference]: Finished difference. Result has 681 places, 639 transitions, 13655 flow [2024-01-31 16:56:52,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13105, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13655, PETRI_PLACES=681, PETRI_TRANSITIONS=639} [2024-01-31 16:56:52,477 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 658 predicate places. [2024-01-31 16:56:52,478 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 639 transitions, 13655 flow [2024-01-31 16:56:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:56:52,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:56:52,478 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:56:52,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2024-01-31 16:56:52,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:52,692 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:56:52,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:56:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash -211936620, now seen corresponding path program 138 times [2024-01-31 16:56:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:56:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080917111] [2024-01-31 16:56:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:56:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:56:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:56:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:56:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:56:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080917111] [2024-01-31 16:56:53,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080917111] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:56:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185487143] [2024-01-31 16:56:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:56:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:56:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:56:53,786 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:56:53,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2024-01-31 16:56:54,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:56:54,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:56:54,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 16:56:54,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:56:54,589 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:56:54,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:56:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:54,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:56:54,734 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:56:54,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:56:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:56:54,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185487143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:56:54,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:56:54,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 33 [2024-01-31 16:56:54,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151026354] [2024-01-31 16:56:54,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:56:54,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:56:54,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:56:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:56:54,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:56:54,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:56:54,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 639 transitions, 13655 flow. Second operand has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:56:54,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:56:54,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:56:54,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:56:57,674 INFO L124 PetriNetUnfolderBase]: 2794/5259 cut-off events. [2024-01-31 16:56:57,675 INFO L125 PetriNetUnfolderBase]: For 1593111/1593111 co-relation queries the response was YES. [2024-01-31 16:56:57,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102021 conditions, 5259 events. 2794/5259 cut-off events. For 1593111/1593111 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 38418 event pairs, 260 based on Foata normal form. 4/5261 useless extension candidates. Maximal degree in co-relation 101716. Up to 3147 conditions per place. [2024-01-31 16:56:57,808 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 470 selfloop transitions, 207 changer transitions 1/679 dead transitions. [2024-01-31 16:56:57,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 679 transitions, 16956 flow [2024-01-31 16:56:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 16:56:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 16:56:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 167 transitions. [2024-01-31 16:56:57,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2792642140468227 [2024-01-31 16:56:57,809 INFO L175 Difference]: Start difference. First operand has 681 places, 639 transitions, 13655 flow. Second operand 26 states and 167 transitions. [2024-01-31 16:56:57,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 679 transitions, 16956 flow [2024-01-31 16:57:07,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 679 transitions, 16681 flow, removed 111 selfloop flow, removed 9 redundant places. [2024-01-31 16:57:07,342 INFO L231 Difference]: Finished difference. Result has 698 places, 640 transitions, 13873 flow [2024-01-31 16:57:07,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13380, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13873, PETRI_PLACES=698, PETRI_TRANSITIONS=640} [2024-01-31 16:57:07,343 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 675 predicate places. [2024-01-31 16:57:07,343 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 640 transitions, 13873 flow [2024-01-31 16:57:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.7272727272727275) internal successors, (156), 33 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:57:07,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:07,343 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:57:07,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2024-01-31 16:57:07,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2024-01-31 16:57:07,557 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:57:07,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash 619982497, now seen corresponding path program 139 times [2024-01-31 16:57:07,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:07,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880635001] [2024-01-31 16:57:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:07,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880635001] [2024-01-31 16:57:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880635001] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566728124] [2024-01-31 16:57:08,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:57:08,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:08,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:08,695 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:08,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2024-01-31 16:57:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:09,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:57:09,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:09,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:09,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:57:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:09,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:09,659 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:57:09,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:57:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:09,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566728124] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:09,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:09,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 33 [2024-01-31 16:57:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699500167] [2024-01-31 16:57:09,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 16:57:09,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 16:57:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 16:57:09,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:57:09,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 640 transitions, 13873 flow. Second operand has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 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 16:57:09,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:09,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:57:09,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:12,313 INFO L124 PetriNetUnfolderBase]: 2814/5309 cut-off events. [2024-01-31 16:57:12,313 INFO L125 PetriNetUnfolderBase]: For 1631999/1631999 co-relation queries the response was YES. [2024-01-31 16:57:12,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103822 conditions, 5309 events. 2814/5309 cut-off events. For 1631999/1631999 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 38911 event pairs, 1054 based on Foata normal form. 12/5319 useless extension candidates. Maximal degree in co-relation 103512. Up to 4557 conditions per place. [2024-01-31 16:57:12,451 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 556 selfloop transitions, 106 changer transitions 1/664 dead transitions. [2024-01-31 16:57:12,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 664 transitions, 15797 flow [2024-01-31 16:57:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 16:57:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 16:57:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 119 transitions. [2024-01-31 16:57:12,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3233695652173913 [2024-01-31 16:57:12,453 INFO L175 Difference]: Start difference. First operand has 698 places, 640 transitions, 13873 flow. Second operand 16 states and 119 transitions. [2024-01-31 16:57:12,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 664 transitions, 15797 flow [2024-01-31 16:57:21,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 688 places, 664 transitions, 15410 flow, removed 29 selfloop flow, removed 25 redundant places. [2024-01-31 16:57:21,792 INFO L231 Difference]: Finished difference. Result has 689 places, 641 transitions, 13778 flow [2024-01-31 16:57:21,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13487, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13778, PETRI_PLACES=689, PETRI_TRANSITIONS=641} [2024-01-31 16:57:21,793 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 666 predicate places. [2024-01-31 16:57:21,793 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 641 transitions, 13778 flow [2024-01-31 16:57:21,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 0 states have call successors, (0), 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 16:57:21,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:21,794 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:57:21,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2024-01-31 16:57:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2024-01-31 16:57:22,005 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:57:22,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1974042356, now seen corresponding path program 140 times [2024-01-31 16:57:22,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:22,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102109190] [2024-01-31 16:57:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:22,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:22,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:22,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102109190] [2024-01-31 16:57:22,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102109190] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:22,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203137515] [2024-01-31 16:57:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:57:22,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:22,473 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:22,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2024-01-31 16:57:23,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:57:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:23,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 16:57:23,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:23,334 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:57:23,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:57:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:57:23,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:23,473 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:57:23,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:57:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:23,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203137515] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:23,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:23,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2024-01-31 16:57:23,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212480581] [2024-01-31 16:57:23,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:57:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:57:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:57:23,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:57:23,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 641 transitions, 13778 flow. Second operand has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:57:23,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:23,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:57:23,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:26,527 INFO L124 PetriNetUnfolderBase]: 2832/5339 cut-off events. [2024-01-31 16:57:26,527 INFO L125 PetriNetUnfolderBase]: For 1659324/1659324 co-relation queries the response was YES. [2024-01-31 16:57:26,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105141 conditions, 5339 events. 2832/5339 cut-off events. For 1659324/1659324 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39262 event pairs, 246 based on Foata normal form. 4/5341 useless extension candidates. Maximal degree in co-relation 104832. Up to 3155 conditions per place. [2024-01-31 16:57:26,649 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 487 selfloop transitions, 199 changer transitions 1/688 dead transitions. [2024-01-31 16:57:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 688 transitions, 17465 flow [2024-01-31 16:57:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:57:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:57:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 135 transitions. [2024-01-31 16:57:26,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2024-01-31 16:57:26,650 INFO L175 Difference]: Start difference. First operand has 689 places, 641 transitions, 13778 flow. Second operand 18 states and 135 transitions. [2024-01-31 16:57:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 688 transitions, 17465 flow [2024-01-31 16:57:35,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 688 transitions, 17212 flow, removed 22 selfloop flow, removed 14 redundant places. [2024-01-31 16:57:35,401 INFO L231 Difference]: Finished difference. Result has 694 places, 645 transitions, 14077 flow [2024-01-31 16:57:35,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13525, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14077, PETRI_PLACES=694, PETRI_TRANSITIONS=645} [2024-01-31 16:57:35,409 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 671 predicate places. [2024-01-31 16:57:35,409 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 645 transitions, 14077 flow [2024-01-31 16:57:35,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.041666666666667) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 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 16:57:35,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:35,409 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:57:35,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2024-01-31 16:57:35,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2024-01-31 16:57:35,622 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:57:35,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:35,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1035768201, now seen corresponding path program 141 times [2024-01-31 16:57:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:35,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566898239] [2024-01-31 16:57:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:57:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:36,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566898239] [2024-01-31 16:57:36,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566898239] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:36,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997169813] [2024-01-31 16:57:36,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:57:36,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:36,767 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:36,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2024-01-31 16:57:37,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:57:37,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:37,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-31 16:57:37,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:37,652 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 16:57:37,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 16:57:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:37,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:37,933 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:57:37,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 16:57:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997169813] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:38,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 11] total 38 [2024-01-31 16:57:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393252370] [2024-01-31 16:57:38,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-01-31 16:57:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-01-31 16:57:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2024-01-31 16:57:38,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:57:38,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 645 transitions, 14077 flow. Second operand has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:57:38,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:38,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:57:38,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:42,068 INFO L124 PetriNetUnfolderBase]: 2877/5415 cut-off events. [2024-01-31 16:57:42,069 INFO L125 PetriNetUnfolderBase]: For 1733300/1733300 co-relation queries the response was YES. [2024-01-31 16:57:42,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108217 conditions, 5415 events. 2877/5415 cut-off events. For 1733300/1733300 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39659 event pairs, 845 based on Foata normal form. 18/5431 useless extension candidates. Maximal degree in co-relation 107907. Up to 4818 conditions per place. [2024-01-31 16:57:42,195 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 639 selfloop transitions, 98 changer transitions 8/746 dead transitions. [2024-01-31 16:57:42,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 746 transitions, 18187 flow [2024-01-31 16:57:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:57:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:57:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 293 transitions. [2024-01-31 16:57:42,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.326644370122631 [2024-01-31 16:57:42,197 INFO L175 Difference]: Start difference. First operand has 694 places, 645 transitions, 14077 flow. Second operand 39 states and 293 transitions. [2024-01-31 16:57:42,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 746 transitions, 18187 flow [2024-01-31 16:57:51,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 746 transitions, 17804 flow, removed 44 selfloop flow, removed 14 redundant places. [2024-01-31 16:57:51,198 INFO L231 Difference]: Finished difference. Result has 724 places, 658 transitions, 14827 flow [2024-01-31 16:57:51,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13707, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14827, PETRI_PLACES=724, PETRI_TRANSITIONS=658} [2024-01-31 16:57:51,199 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 701 predicate places. [2024-01-31 16:57:51,199 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 658 transitions, 14827 flow [2024-01-31 16:57:51,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7105263157894735) internal successors, (179), 38 states have internal predecessors, (179), 0 states have call successors, (0), 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 16:57:51,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:57:51,199 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:57:51,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2024-01-31 16:57:51,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:51,412 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:57:51,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:57:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash -341532464, now seen corresponding path program 142 times [2024-01-31 16:57:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:57:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478970845] [2024-01-31 16:57:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:57:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:57:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:57:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:51,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:57:51,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478970845] [2024-01-31 16:57:51,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478970845] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:57:51,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074343283] [2024-01-31 16:57:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:57:51,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:57:51,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:57:51,955 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:57:51,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2024-01-31 16:57:52,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:57:52,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:57:52,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:57:52,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:57:52,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:57:52,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:57:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:52,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:57:52,881 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:57:52,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:57:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:57:52,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074343283] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:57:52,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:57:52,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-01-31 16:57:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405890013] [2024-01-31 16:57:52,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:57:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:57:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:57:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:57:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:57:52,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:57:52,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 658 transitions, 14827 flow. Second operand has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:57:52,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:57:52,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:57:52,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:57:56,111 INFO L124 PetriNetUnfolderBase]: 2892/5455 cut-off events. [2024-01-31 16:57:56,111 INFO L125 PetriNetUnfolderBase]: For 1882491/1882491 co-relation queries the response was YES. [2024-01-31 16:57:56,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112452 conditions, 5455 events. 2892/5455 cut-off events. For 1882491/1882491 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 40180 event pairs, 1234 based on Foata normal form. 8/5461 useless extension candidates. Maximal degree in co-relation 112135. Up to 4958 conditions per place. [2024-01-31 16:57:56,257 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 636 selfloop transitions, 65 changer transitions 3/705 dead transitions. [2024-01-31 16:57:56,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 705 transitions, 17463 flow [2024-01-31 16:57:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 16:57:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 16:57:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 147 transitions. [2024-01-31 16:57:56,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37595907928388744 [2024-01-31 16:57:56,259 INFO L175 Difference]: Start difference. First operand has 724 places, 658 transitions, 14827 flow. Second operand 17 states and 147 transitions. [2024-01-31 16:57:56,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 705 transitions, 17463 flow [2024-01-31 16:58:07,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 705 transitions, 16579 flow, removed 392 selfloop flow, removed 27 redundant places. [2024-01-31 16:58:07,174 INFO L231 Difference]: Finished difference. Result has 715 places, 660 transitions, 14375 flow [2024-01-31 16:58:07,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14063, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=14375, PETRI_PLACES=715, PETRI_TRANSITIONS=660} [2024-01-31 16:58:07,174 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 692 predicate places. [2024-01-31 16:58:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 715 places, 660 transitions, 14375 flow [2024-01-31 16:58:07,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.875) internal successors, (117), 24 states have internal predecessors, (117), 0 states have call successors, (0), 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 16:58:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:58:07,175 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:58:07,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2024-01-31 16:58:07,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:07,389 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:58:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:58:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 924341998, now seen corresponding path program 143 times [2024-01-31 16:58:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:58:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522446235] [2024-01-31 16:58:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:58:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:58:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:07,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:58:07,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522446235] [2024-01-31 16:58:07,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522446235] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:58:07,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465733798] [2024-01-31 16:58:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:58:07,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:07,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:58:07,905 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:58:07,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2024-01-31 16:58:08,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:58:08,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:58:08,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 16:58:08,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:58:08,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:58:08,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-31 16:58:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:08,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:58:09,092 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-01-31 16:58:09,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2024-01-31 16:58:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465733798] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:58:09,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:58:09,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:58:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100038876] [2024-01-31 16:58:09,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:58:09,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:58:09,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:58:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:58:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:58:09,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:58:09,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 660 transitions, 14375 flow. Second operand has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 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 16:58:09,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:58:09,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:58:09,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:58:12,472 INFO L124 PetriNetUnfolderBase]: 2938/5543 cut-off events. [2024-01-31 16:58:12,473 INFO L125 PetriNetUnfolderBase]: For 1928653/1928653 co-relation queries the response was YES. [2024-01-31 16:58:12,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114430 conditions, 5543 events. 2938/5543 cut-off events. For 1928653/1928653 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41010 event pairs, 252 based on Foata normal form. 4/5545 useless extension candidates. Maximal degree in co-relation 114113. Up to 3273 conditions per place. [2024-01-31 16:58:12,610 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 516 selfloop transitions, 208 changer transitions 3/728 dead transitions. [2024-01-31 16:58:12,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 728 transitions, 19266 flow [2024-01-31 16:58:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:58:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:58:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 158 transitions. [2024-01-31 16:58:12,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36155606407322655 [2024-01-31 16:58:12,611 INFO L175 Difference]: Start difference. First operand has 715 places, 660 transitions, 14375 flow. Second operand 19 states and 158 transitions. [2024-01-31 16:58:12,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 728 transitions, 19266 flow [2024-01-31 16:58:23,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 728 transitions, 19058 flow, removed 45 selfloop flow, removed 15 redundant places. [2024-01-31 16:58:23,631 INFO L231 Difference]: Finished difference. Result has 721 places, 668 transitions, 15140 flow [2024-01-31 16:58:23,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14167, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15140, PETRI_PLACES=721, PETRI_TRANSITIONS=668} [2024-01-31 16:58:23,638 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 698 predicate places. [2024-01-31 16:58:23,638 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 668 transitions, 15140 flow [2024-01-31 16:58:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.0) internal successors, (135), 27 states have internal predecessors, (135), 0 states have call successors, (0), 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 16:58:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:58:23,638 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:58:23,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2024-01-31 16:58:23,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:23,852 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:58:23,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:58:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 578881049, now seen corresponding path program 144 times [2024-01-31 16:58:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:58:23,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564234871] [2024-01-31 16:58:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:58:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:58:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:58:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564234871] [2024-01-31 16:58:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564234871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:58:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776134507] [2024-01-31 16:58:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:58:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:58:24,363 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:58:24,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2024-01-31 16:58:25,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 16:58:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:58:25,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:58:25,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:58:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:25,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:58:25,303 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:58:25,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:58:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776134507] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:58:25,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:58:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2024-01-31 16:58:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490633857] [2024-01-31 16:58:25,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:58:25,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:58:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:58:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:58:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:58:25,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:58:25,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 668 transitions, 15140 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:58:25,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:58:25,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:58:25,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:58:28,323 INFO L124 PetriNetUnfolderBase]: 2936/5541 cut-off events. [2024-01-31 16:58:28,323 INFO L125 PetriNetUnfolderBase]: For 1942993/1942993 co-relation queries the response was YES. [2024-01-31 16:58:28,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115580 conditions, 5541 events. 2936/5541 cut-off events. For 1942993/1942993 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 41106 event pairs, 1133 based on Foata normal form. 2/5541 useless extension candidates. Maximal degree in co-relation 115260. Up to 4847 conditions per place. [2024-01-31 16:58:28,459 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 594 selfloop transitions, 82 changer transitions 10/687 dead transitions. [2024-01-31 16:58:28,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 687 transitions, 16804 flow [2024-01-31 16:58:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:58:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:58:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2024-01-31 16:58:28,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32806324110671936 [2024-01-31 16:58:28,460 INFO L175 Difference]: Start difference. First operand has 721 places, 668 transitions, 15140 flow. Second operand 11 states and 83 transitions. [2024-01-31 16:58:28,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 687 transitions, 16804 flow [2024-01-31 16:58:39,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 687 transitions, 16076 flow, removed 188 selfloop flow, removed 14 redundant places. [2024-01-31 16:58:39,514 INFO L231 Difference]: Finished difference. Result has 719 places, 667 transitions, 14576 flow [2024-01-31 16:58:39,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14412, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14576, PETRI_PLACES=719, PETRI_TRANSITIONS=667} [2024-01-31 16:58:39,514 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 696 predicate places. [2024-01-31 16:58:39,514 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 667 transitions, 14576 flow [2024-01-31 16:58:39,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 16:58:39,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:58:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:58:39,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2024-01-31 16:58:39,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:39,729 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:58:39,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:58:39,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1849452773, now seen corresponding path program 145 times [2024-01-31 16:58:39,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:58:39,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870595478] [2024-01-31 16:58:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:58:39,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:58:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:58:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870595478] [2024-01-31 16:58:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870595478] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:58:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744939152] [2024-01-31 16:58:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:58:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:58:40,176 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:58:40,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2024-01-31 16:58:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:40,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:58:40,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:58:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:40,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:58:41,032 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:58:41,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:58:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:41,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744939152] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:58:41,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:58:41,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-01-31 16:58:41,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953361807] [2024-01-31 16:58:41,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:58:41,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:58:41,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:58:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:58:41,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:58:41,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:58:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 667 transitions, 14576 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:58:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:58:41,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:58:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:58:44,141 INFO L124 PetriNetUnfolderBase]: 2928/5522 cut-off events. [2024-01-31 16:58:44,141 INFO L125 PetriNetUnfolderBase]: For 1925033/1925033 co-relation queries the response was YES. [2024-01-31 16:58:44,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113665 conditions, 5522 events. 2928/5522 cut-off events. For 1925033/1925033 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40774 event pairs, 1313 based on Foata normal form. 4/5524 useless extension candidates. Maximal degree in co-relation 113343. Up to 5212 conditions per place. [2024-01-31 16:58:44,274 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 644 selfloop transitions, 47 changer transitions 17/709 dead transitions. [2024-01-31 16:58:44,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 709 transitions, 16845 flow [2024-01-31 16:58:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 16:58:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 16:58:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 144 transitions. [2024-01-31 16:58:44,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3130434782608696 [2024-01-31 16:58:44,275 INFO L175 Difference]: Start difference. First operand has 719 places, 667 transitions, 14576 flow. Second operand 20 states and 144 transitions. [2024-01-31 16:58:44,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 709 transitions, 16845 flow [2024-01-31 16:58:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 709 transitions, 16663 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-01-31 16:58:56,576 INFO L231 Difference]: Finished difference. Result has 729 places, 667 transitions, 14508 flow [2024-01-31 16:58:56,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14396, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=14508, PETRI_PLACES=729, PETRI_TRANSITIONS=667} [2024-01-31 16:58:56,577 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 706 predicate places. [2024-01-31 16:58:56,577 INFO L495 AbstractCegarLoop]: Abstraction has has 729 places, 667 transitions, 14508 flow [2024-01-31 16:58:56,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 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 16:58:56,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:58:56,578 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:58:56,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2024-01-31 16:58:56,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:56,791 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:58:56,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:58:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1420565193, now seen corresponding path program 146 times [2024-01-31 16:58:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:58:56,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393692547] [2024-01-31 16:58:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:58:56,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:58:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:58:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:58:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:58:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393692547] [2024-01-31 16:58:57,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393692547] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:58:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273135065] [2024-01-31 16:58:57,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:58:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:58:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:58:57,916 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:58:57,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2024-01-31 16:58:58,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:58:58,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:58:58,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 16:58:58,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:58:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 16:58:58,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:58:58,878 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:58:58,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 16:58:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:58:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273135065] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:58:58,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:58:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 9] total 34 [2024-01-31 16:58:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47467698] [2024-01-31 16:58:58,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:58:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 16:58:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:58:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 16:58:58,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 16:58:58,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:58:58,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 667 transitions, 14508 flow. Second operand has 34 states, 34 states have (on average 4.882352941176471) internal successors, (166), 34 states have internal predecessors, (166), 0 states have call successors, (0), 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 16:58:58,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:58:58,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:58:58,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:59:02,352 INFO L124 PetriNetUnfolderBase]: 2959/5560 cut-off events. [2024-01-31 16:59:02,353 INFO L125 PetriNetUnfolderBase]: For 2051117/2051117 co-relation queries the response was YES. [2024-01-31 16:59:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115832 conditions, 5560 events. 2959/5560 cut-off events. For 2051117/2051117 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 40909 event pairs, 1316 based on Foata normal form. 18/5576 useless extension candidates. Maximal degree in co-relation 115534. Up to 5213 conditions per place. [2024-01-31 16:59:02,487 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 651 selfloop transitions, 65 changer transitions 0/717 dead transitions. [2024-01-31 16:59:02,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 717 transitions, 17342 flow [2024-01-31 16:59:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:59:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:59:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 191 transitions. [2024-01-31 16:59:02,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296583850931677 [2024-01-31 16:59:02,488 INFO L175 Difference]: Start difference. First operand has 729 places, 667 transitions, 14508 flow. Second operand 28 states and 191 transitions. [2024-01-31 16:59:02,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 717 transitions, 17342 flow [2024-01-31 16:59:14,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 717 transitions, 17202 flow, removed 20 selfloop flow, removed 15 redundant places. [2024-01-31 16:59:14,616 INFO L231 Difference]: Finished difference. Result has 741 places, 671 transitions, 14751 flow [2024-01-31 16:59:14,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14368, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14751, PETRI_PLACES=741, PETRI_TRANSITIONS=671} [2024-01-31 16:59:14,616 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 718 predicate places. [2024-01-31 16:59:14,616 INFO L495 AbstractCegarLoop]: Abstraction has has 741 places, 671 transitions, 14751 flow [2024-01-31 16:59:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.882352941176471) internal successors, (166), 34 states have internal predecessors, (166), 0 states have call successors, (0), 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 16:59:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:59:14,617 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:59:14,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2024-01-31 16:59:14,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:59:14,830 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:59:14,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:59:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1263402175, now seen corresponding path program 147 times [2024-01-31 16:59:14,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:59:14,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118389823] [2024-01-31 16:59:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:59:14,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:59:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:59:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:59:15,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:59:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118389823] [2024-01-31 16:59:15,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118389823] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:59:15,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394114386] [2024-01-31 16:59:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:59:15,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:59:15,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:59:15,998 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:59:15,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2024-01-31 16:59:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:59:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:59:16,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 16:59:16,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:59:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:16,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:59:16,982 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:59:16,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:59:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394114386] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:59:17,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:59:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 9] total 35 [2024-01-31 16:59:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440743537] [2024-01-31 16:59:17,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:59:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-31 16:59:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:59:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-31 16:59:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2024-01-31 16:59:17,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:59:17,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 741 places, 671 transitions, 14751 flow. Second operand has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:59:17,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:59:17,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:59:17,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:59:20,293 INFO L124 PetriNetUnfolderBase]: 2958/5561 cut-off events. [2024-01-31 16:59:20,294 INFO L125 PetriNetUnfolderBase]: For 2097745/2097745 co-relation queries the response was YES. [2024-01-31 16:59:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117073 conditions, 5561 events. 2958/5561 cut-off events. For 2097745/2097745 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 41062 event pairs, 1134 based on Foata normal form. 2/5561 useless extension candidates. Maximal degree in co-relation 116745. Up to 4865 conditions per place. [2024-01-31 16:59:20,583 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 574 selfloop transitions, 105 changer transitions 4/684 dead transitions. [2024-01-31 16:59:20,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 684 transitions, 16337 flow [2024-01-31 16:59:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 16:59:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 16:59:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 132 transitions. [2024-01-31 16:59:20,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2608695652173913 [2024-01-31 16:59:20,584 INFO L175 Difference]: Start difference. First operand has 741 places, 671 transitions, 14751 flow. Second operand 22 states and 132 transitions. [2024-01-31 16:59:20,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 684 transitions, 16337 flow [2024-01-31 16:59:33,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 684 transitions, 16076 flow, removed 69 selfloop flow, removed 24 redundant places. [2024-01-31 16:59:33,347 INFO L231 Difference]: Finished difference. Result has 739 places, 669 transitions, 14674 flow [2024-01-31 16:59:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14490, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14674, PETRI_PLACES=739, PETRI_TRANSITIONS=669} [2024-01-31 16:59:33,347 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 716 predicate places. [2024-01-31 16:59:33,347 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 669 transitions, 14674 flow [2024-01-31 16:59:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.628571428571429) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 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 16:59:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:59:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:59:33,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2024-01-31 16:59:33,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2024-01-31 16:59:33,561 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:59:33,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:59:33,562 INFO L85 PathProgramCache]: Analyzing trace with hash -87903249, now seen corresponding path program 148 times [2024-01-31 16:59:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:59:33,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390278990] [2024-01-31 16:59:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:59:33,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:59:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:59:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:59:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:59:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390278990] [2024-01-31 16:59:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390278990] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:59:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481012033] [2024-01-31 16:59:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:59:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:59:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:59:34,665 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:59:34,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2024-01-31 16:59:35,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:59:35,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:59:35,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 16:59:35,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:59:35,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:59:35,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 16:59:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:35,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:59:35,682 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 16:59:35,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 94 [2024-01-31 16:59:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481012033] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:59:35,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:59:35,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 34 [2024-01-31 16:59:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677245808] [2024-01-31 16:59:35,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:59:35,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 16:59:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:59:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 16:59:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 16:59:35,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:59:35,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 669 transitions, 14674 flow. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:59:35,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:59:35,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:59:35,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:59:39,243 INFO L124 PetriNetUnfolderBase]: 2950/5531 cut-off events. [2024-01-31 16:59:39,244 INFO L125 PetriNetUnfolderBase]: For 2081070/2081070 co-relation queries the response was YES. [2024-01-31 16:59:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116255 conditions, 5531 events. 2950/5531 cut-off events. For 2081070/2081070 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 40611 event pairs, 1119 based on Foata normal form. 2/5531 useless extension candidates. Maximal degree in co-relation 115994. Up to 4814 conditions per place. [2024-01-31 16:59:39,377 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 577 selfloop transitions, 109 changer transitions 2/689 dead transitions. [2024-01-31 16:59:39,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 689 transitions, 16524 flow [2024-01-31 16:59:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 16:59:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 16:59:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 145 transitions. [2024-01-31 16:59:39,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2741020793950851 [2024-01-31 16:59:39,379 INFO L175 Difference]: Start difference. First operand has 739 places, 669 transitions, 14674 flow. Second operand 23 states and 145 transitions. [2024-01-31 16:59:39,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 689 transitions, 16524 flow [2024-01-31 16:59:51,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 689 transitions, 16293 flow, removed 3 selfloop flow, removed 23 redundant places. [2024-01-31 16:59:51,416 INFO L231 Difference]: Finished difference. Result has 736 places, 667 transitions, 14640 flow [2024-01-31 16:59:51,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14426, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14640, PETRI_PLACES=736, PETRI_TRANSITIONS=667} [2024-01-31 16:59:51,416 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 713 predicate places. [2024-01-31 16:59:51,416 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 667 transitions, 14640 flow [2024-01-31 16:59:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 states have internal predecessors, (156), 0 states have call successors, (0), 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 16:59:51,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:59:51,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:59:51,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2024-01-31 16:59:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2024-01-31 16:59:51,631 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 16:59:51,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:59:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1243486861, now seen corresponding path program 149 times [2024-01-31 16:59:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:59:51,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878833132] [2024-01-31 16:59:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:59:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:59:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:59:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:59:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878833132] [2024-01-31 16:59:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878833132] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:59:52,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300398747] [2024-01-31 16:59:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:59:52,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:59:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:59:52,144 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:59:52,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2024-01-31 16:59:52,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 16:59:52,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:59:52,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 16:59:52,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:59:52,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 16:59:52,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 45 [2024-01-31 16:59:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:53,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:59:53,123 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 16:59:53,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 16:59:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 16:59:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300398747] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:59:53,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:59:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 27 [2024-01-31 16:59:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396316183] [2024-01-31 16:59:53,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:59:53,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 16:59:53,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:59:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 16:59:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2024-01-31 16:59:53,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 16:59:53,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 667 transitions, 14640 flow. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 16:59:53,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:59:53,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 16:59:53,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:59:56,503 INFO L124 PetriNetUnfolderBase]: 2979/5603 cut-off events. [2024-01-31 16:59:56,503 INFO L125 PetriNetUnfolderBase]: For 2156175/2156175 co-relation queries the response was YES. [2024-01-31 16:59:56,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118222 conditions, 5603 events. 2979/5603 cut-off events. For 2156175/2156175 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 41280 event pairs, 1313 based on Foata normal form. 18/5619 useless extension candidates. Maximal degree in co-relation 117963. Up to 5221 conditions per place. [2024-01-31 16:59:56,641 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 652 selfloop transitions, 63 changer transitions 1/717 dead transitions. [2024-01-31 16:59:56,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 717 transitions, 17256 flow [2024-01-31 16:59:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 16:59:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 16:59:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 155 transitions. [2024-01-31 16:59:56,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35469107551487417 [2024-01-31 16:59:56,643 INFO L175 Difference]: Start difference. First operand has 736 places, 667 transitions, 14640 flow. Second operand 19 states and 155 transitions. [2024-01-31 16:59:56,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 717 transitions, 17256 flow [2024-01-31 17:00:09,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 717 transitions, 17038 flow, removed 0 selfloop flow, removed 21 redundant places. [2024-01-31 17:00:09,027 INFO L231 Difference]: Finished difference. Result has 735 places, 670 transitions, 14832 flow [2024-01-31 17:00:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14422, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14832, PETRI_PLACES=735, PETRI_TRANSITIONS=670} [2024-01-31 17:00:09,028 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 712 predicate places. [2024-01-31 17:00:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 670 transitions, 14832 flow [2024-01-31 17:00:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 17:00:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:00:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:00:09,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2024-01-31 17:00:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2024-01-31 17:00:09,232 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:00:09,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:00:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash -529421935, now seen corresponding path program 150 times [2024-01-31 17:00:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:00:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897840983] [2024-01-31 17:00:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:00:09,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:00:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:00:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:00:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:00:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897840983] [2024-01-31 17:00:09,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897840983] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:00:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280050370] [2024-01-31 17:00:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:00:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:00:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:00:09,884 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:00:09,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2024-01-31 17:00:10,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:00:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:00:10,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-31 17:00:10,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:00:11,029 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:00:11,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-01-31 17:00:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-01-31 17:00:11,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:00:11,171 INFO L349 Elim1Store]: treesize reduction 11, result has 86.7 percent of original size [2024-01-31 17:00:11,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 83 [2024-01-31 17:00:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 17:00:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280050370] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:00:11,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:00:11,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 9] total 30 [2024-01-31 17:00:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061469534] [2024-01-31 17:00:11,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:00:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:00:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:00:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:00:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:00:11,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:00:11,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 670 transitions, 14832 flow. Second operand has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 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 17:00:11,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:00:11,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:00:11,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:00:14,659 INFO L124 PetriNetUnfolderBase]: 3030/5693 cut-off events. [2024-01-31 17:00:14,660 INFO L125 PetriNetUnfolderBase]: For 2273870/2273870 co-relation queries the response was YES. [2024-01-31 17:00:14,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121632 conditions, 5693 events. 3030/5693 cut-off events. For 2273870/2273870 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42051 event pairs, 1308 based on Foata normal form. 18/5709 useless extension candidates. Maximal degree in co-relation 121370. Up to 5253 conditions per place. [2024-01-31 17:00:14,818 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 651 selfloop transitions, 84 changer transitions 0/736 dead transitions. [2024-01-31 17:00:14,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 736 transitions, 18148 flow [2024-01-31 17:00:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:00:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:00:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2024-01-31 17:00:14,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277591973244147 [2024-01-31 17:00:14,819 INFO L175 Difference]: Start difference. First operand has 735 places, 670 transitions, 14832 flow. Second operand 26 states and 196 transitions. [2024-01-31 17:00:14,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 736 transitions, 18148 flow [2024-01-31 17:00:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 736 transitions, 17877 flow, removed 76 selfloop flow, removed 14 redundant places. [2024-01-31 17:00:30,707 INFO L231 Difference]: Finished difference. Result has 750 places, 681 transitions, 15204 flow [2024-01-31 17:00:30,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14565, PETRI_DIFFERENCE_MINUEND_PLACES=721, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15204, PETRI_PLACES=750, PETRI_TRANSITIONS=681} [2024-01-31 17:00:30,708 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 727 predicate places. [2024-01-31 17:00:30,708 INFO L495 AbstractCegarLoop]: Abstraction has has 750 places, 681 transitions, 15204 flow [2024-01-31 17:00:30,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.833333333333333) internal successors, (145), 30 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 17:00:30,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:00:30,708 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:00:30,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2024-01-31 17:00:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:00:30,915 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:00:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:00:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1383022835, now seen corresponding path program 151 times [2024-01-31 17:00:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:00:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570549238] [2024-01-31 17:00:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:00:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:00:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:00:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:00:31,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:00:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570549238] [2024-01-31 17:00:31,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570549238] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:00:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482442351] [2024-01-31 17:00:31,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:00:31,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:00:31,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:00:31,666 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:00:31,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2024-01-31 17:00:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:00:32,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:00:32,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:00:32,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:00:32,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 34 [2024-01-31 17:00:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 17:00:32,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:00:32,597 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 17:00:32,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-01-31 17:00:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 17:00:32,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482442351] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:00:32,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:00:32,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2024-01-31 17:00:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124726138] [2024-01-31 17:00:32,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:00:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:00:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:00:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:00:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:00:32,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:00:32,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 681 transitions, 15204 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:00:32,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:00:32,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:00:32,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:00:36,467 INFO L124 PetriNetUnfolderBase]: 3034/5732 cut-off events. [2024-01-31 17:00:36,467 INFO L125 PetriNetUnfolderBase]: For 2368288/2368288 co-relation queries the response was YES. [2024-01-31 17:00:36,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122868 conditions, 5732 events. 3034/5732 cut-off events. For 2368288/2368288 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42600 event pairs, 1121 based on Foata normal form. 24/5754 useless extension candidates. Maximal degree in co-relation 122602. Up to 4771 conditions per place. [2024-01-31 17:00:36,613 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 598 selfloop transitions, 142 changer transitions 4/745 dead transitions. [2024-01-31 17:00:36,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 745 transitions, 18495 flow [2024-01-31 17:00:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:00:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:00:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 201 transitions. [2024-01-31 17:00:36,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33612040133779264 [2024-01-31 17:00:36,615 INFO L175 Difference]: Start difference. First operand has 750 places, 681 transitions, 15204 flow. Second operand 26 states and 201 transitions. [2024-01-31 17:00:36,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 745 transitions, 18495 flow [2024-01-31 17:00:51,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 745 transitions, 18101 flow, removed 122 selfloop flow, removed 20 redundant places. [2024-01-31 17:00:51,946 INFO L231 Difference]: Finished difference. Result has 758 places, 685 transitions, 15394 flow [2024-01-31 17:00:51,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14810, PETRI_DIFFERENCE_MINUEND_PLACES=730, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15394, PETRI_PLACES=758, PETRI_TRANSITIONS=685} [2024-01-31 17:00:51,949 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 735 predicate places. [2024-01-31 17:00:51,949 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 685 transitions, 15394 flow [2024-01-31 17:00:51,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 0 states have call successors, (0), 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 17:00:51,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:00:51,949 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:00:51,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2024-01-31 17:00:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:00:52,163 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:00:52,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:00:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1064691921, now seen corresponding path program 152 times [2024-01-31 17:00:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:00:52,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767395247] [2024-01-31 17:00:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:00:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:00:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:00:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 17:00:52,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:00:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767395247] [2024-01-31 17:00:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767395247] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:00:52,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247109852] [2024-01-31 17:00:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:00:52,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:00:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:00:52,642 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:00:52,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2024-01-31 17:00:53,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:00:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:00:53,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:00:53,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:00:53,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:00:53,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-01-31 17:00:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-31 17:00:53,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:00:53,691 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-01-31 17:00:53,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-01-31 17:00:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-31 17:00:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247109852] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:00:53,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:00:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-01-31 17:00:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500886515] [2024-01-31 17:00:53,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:00:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:00:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:00:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:00:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:00:53,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-31 17:00:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 685 transitions, 15394 flow. Second operand has 26 states, 26 states have (on average 4.884615384615385) internal successors, (127), 26 states have internal predecessors, (127), 0 states have call successors, (0), 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 17:00:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:00:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-31 17:00:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:00:57,653 INFO L124 PetriNetUnfolderBase]: 3064/5798 cut-off events. [2024-01-31 17:00:57,654 INFO L125 PetriNetUnfolderBase]: For 2465737/2465737 co-relation queries the response was YES. [2024-01-31 17:00:57,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126727 conditions, 5798 events. 3064/5798 cut-off events. For 2465737/2465737 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43389 event pairs, 1099 based on Foata normal form. 16/5812 useless extension candidates. Maximal degree in co-relation 126458. Up to 4795 conditions per place. [2024-01-31 17:00:57,818 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 629 selfloop transitions, 125 changer transitions 9/764 dead transitions. [2024-01-31 17:00:57,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 764 transitions, 19342 flow [2024-01-31 17:00:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:00:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:00:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 205 transitions. [2024-01-31 17:00:57,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565217391304348 [2024-01-31 17:00:57,819 INFO L175 Difference]: Start difference. First operand has 758 places, 685 transitions, 15394 flow. Second operand 25 states and 205 transitions. [2024-01-31 17:00:57,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 764 transitions, 19342 flow Killed by 15