./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:00:22,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:00:22,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:00:22,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:00:22,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:00:22,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:00:22,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:00:22,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:00:22,107 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:00:22,108 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:00:22,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:00:22,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:00:22,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:00:22,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:00:22,111 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:00:22,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:00:22,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:00:22,112 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:00:22,112 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:00:22,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:00:22,113 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:00:22,113 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:00:22,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:00:22,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:00:22,114 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:00:22,114 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:00:22,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:00:22,114 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:00:22,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:00:22,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:00:22,116 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:00:22,116 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:00:22,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:22,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:00:22,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:00:22,117 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:00:22,117 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:00:22,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:00:22,117 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:00:22,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:00:22,118 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:00:22,118 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:00:22,118 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:00:22,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:00:22,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:00:22,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:00:22,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:00:22,355 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:00:22,356 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:00:22,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:23,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:00:23,633 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:00:23,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:23,655 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c091b3bd/93f4c1bb389b45098217fc140320d83d/FLAG80ca915ba [2024-06-27 23:00:23,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c091b3bd/93f4c1bb389b45098217fc140320d83d [2024-06-27 23:00:23,668 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:00:23,670 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:00:23,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 23:00:23,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:00:23,747 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:00:23,748 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:23,748 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:00:23,752 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:00:23,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:23" (1/2) ... [2024-06-27 23:00:23,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@637f9226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,754 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:00:23" (1/2) ... [2024-06-27 23:00:23,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b23c127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/2) ... [2024-06-27 23:00:23,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@637f9226 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:23, skipping insertion in model container [2024-06-27 23:00:23,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/2) ... [2024-06-27 23:00:23,758 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:00:23,779 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:00:23,781 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ! multithreaded || (((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:00:23,781 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ! multithreaded || (((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:00:23,781 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ! multithreaded || (((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) [2024-06-27 23:00:23,781 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:00:23,781 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 23:00:23,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:00:24,081 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:24,089 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:00:24,152 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:00:24,179 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:00:24,181 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24 WrapperNode [2024-06-27 23:00:24,181 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:00:24,182 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:24,182 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:00:24,182 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:00:24,188 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 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,215 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 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,237 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 23:00:24,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:00:24,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:00:24,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:00:24,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:00:24,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,259 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,278 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:00:24,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,294 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:00:24,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:00:24,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:00:24,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:00:24,308 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (1/1) ... [2024-06-27 23:00:24,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:00:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:00:24,350 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) [2024-06-27 23:00:24,379 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 [2024-06-27 23:00:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:00:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:00:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:00:24,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:00:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:00:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:00:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:00:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:00:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:00:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:00:24,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:00:24,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:00:24,397 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:00:24,524 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:00:24,527 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:00:24,671 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:00:24,671 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:00:24,755 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:00:24,755 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:00:24,756 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:24 BoogieIcfgContainer [2024-06-27 23:00:24,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:00:24,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:00:24,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:00:24,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:00:24,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:00:23" (1/4) ... [2024-06-27 23:00:24,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4f4100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:00:23" (2/4) ... [2024-06-27 23:00:24,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4f4100 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:00:24" (3/4) ... [2024-06-27 23:00:24,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4f4100 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:00:24, skipping insertion in model container [2024-06-27 23:00:24,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:00:24" (4/4) ... [2024-06-27 23:00:24,776 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 23:00:24,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:00:24,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:00:24,790 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:00:24,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:00:24,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 23:00:24,918 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 23:00:24,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:24,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:00:24,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 23:00:24,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 23:00:24,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:00:24,942 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;@1b973d20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:00:24,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:00:24,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:00:24,945 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:00:24,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:00:24,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:24,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:00:24,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:24,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-27 23:00:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:24,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463007856] [2024-06-27 23:00:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:24,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463007856] [2024-06-27 23:00:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463007856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:25,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:00:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093480317] [2024-06-27 23:00:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:25,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:00:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:25,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:00:25,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:00:25,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-27 23:00:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:25,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:25,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-27 23:00:25,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:25,623 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-27 23:00:25,624 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 23:00:25,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3885 event pairs, 288 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-27 23:00:25,660 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 23:00:25,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-27 23:00:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:00:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:00:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 23:00:25,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-27 23:00:25,673 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-27 23:00:25,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-27 23:00:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:25,679 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 23:00:25,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 23:00:25,684 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 23:00:25,685 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 23:00:25,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:25,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:00:25,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:25,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2144207147, now seen corresponding path program 1 times [2024-06-27 23:00:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176432890] [2024-06-27 23:00:25,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:25,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176432890] [2024-06-27 23:00:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176432890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:25,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773046411] [2024-06-27 23:00:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:25,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:25,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:25,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:25,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:25,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:26,106 INFO L124 PetriNetUnfolderBase]: 754/1256 cut-off events. [2024-06-27 23:00:26,107 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-27 23:00:26,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1256 events. 754/1256 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6191 event pairs, 318 based on Foata normal form. 6/1258 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-27 23:00:26,113 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 23:00:26,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 250 flow [2024-06-27 23:00:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-27 23:00:26,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-27 23:00:26,117 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 107 transitions. [2024-06-27 23:00:26,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 250 flow [2024-06-27 23:00:26,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:26,120 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-27 23:00:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-27 23:00:26,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 23:00:26,121 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-27 23:00:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:26,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:00:26,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:26,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1001248148, now seen corresponding path program 1 times [2024-06-27 23:00:26,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:26,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504549289] [2024-06-27 23:00:26,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:26,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:26,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504549289] [2024-06-27 23:00:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504549289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:26,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:26,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107155141] [2024-06-27 23:00:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:26,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:26,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:26,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:26,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:26,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:26,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:26,477 INFO L124 PetriNetUnfolderBase]: 745/1241 cut-off events. [2024-06-27 23:00:26,477 INFO L125 PetriNetUnfolderBase]: For 594/630 co-relation queries the response was YES. [2024-06-27 23:00:26,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1241 events. 745/1241 cut-off events. For 594/630 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6074 event pairs, 218 based on Foata normal form. 19/1256 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-27 23:00:26,484 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-27 23:00:26,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 310 flow [2024-06-27 23:00:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 23:00:26,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-27 23:00:26,486 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 128 transitions. [2024-06-27 23:00:26,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 310 flow [2024-06-27 23:00:26,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:26,488 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-27 23:00:26,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-27 23:00:26,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-27 23:00:26,489 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-27 23:00:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:26,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:26,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:00:26,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:26,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1088277451, now seen corresponding path program 1 times [2024-06-27 23:00:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664118385] [2024-06-27 23:00:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:26,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664118385] [2024-06-27 23:00:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664118385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:26,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:00:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768222838] [2024-06-27 23:00:26,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:26,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:00:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:26,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:00:26,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:00:26,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:26,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:26,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:26,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:26,791 INFO L124 PetriNetUnfolderBase]: 901/1480 cut-off events. [2024-06-27 23:00:26,791 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2024-06-27 23:00:26,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 1480 events. 901/1480 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7295 event pairs, 356 based on Foata normal form. 4/1481 useless extension candidates. Maximal degree in co-relation 4033. Up to 1339 conditions per place. [2024-06-27 23:00:26,800 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-27 23:00:26,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 340 flow [2024-06-27 23:00:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-27 23:00:26,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:00:26,801 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 100 transitions. [2024-06-27 23:00:26,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 340 flow [2024-06-27 23:00:26,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 317 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:26,805 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 212 flow [2024-06-27 23:00:26,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-06-27 23:00:26,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-27 23:00:26,805 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 212 flow [2024-06-27 23:00:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:00:26,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:26,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1104033126, now seen corresponding path program 1 times [2024-06-27 23:00:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588456259] [2024-06-27 23:00:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:26,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:26,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588456259] [2024-06-27 23:00:26,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588456259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:26,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:26,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312081638] [2024-06-27 23:00:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:26,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:26,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:26,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:26,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:26,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:26,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-27 23:00:26,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:26,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:26,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:27,102 INFO L124 PetriNetUnfolderBase]: 877/1463 cut-off events. [2024-06-27 23:00:27,102 INFO L125 PetriNetUnfolderBase]: For 2017/2078 co-relation queries the response was YES. [2024-06-27 23:00:27,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 1463 events. 877/1463 cut-off events. For 2017/2078 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7403 event pairs, 314 based on Foata normal form. 14/1456 useless extension candidates. Maximal degree in co-relation 4492. Up to 1247 conditions per place. [2024-06-27 23:00:27,112 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-27 23:00:27,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 442 flow [2024-06-27 23:00:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 23:00:27,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-27 23:00:27,113 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 212 flow. Second operand 5 states and 131 transitions. [2024-06-27 23:00:27,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 442 flow [2024-06-27 23:00:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 440 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:27,117 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 288 flow [2024-06-27 23:00:27,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-27 23:00:27,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-27 23:00:27,118 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 288 flow [2024-06-27 23:00:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-27 23:00:27,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:27,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:00:27,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:27,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash -933894106, now seen corresponding path program 2 times [2024-06-27 23:00:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:27,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805514529] [2024-06-27 23:00:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:27,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:27,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805514529] [2024-06-27 23:00:27,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805514529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058947473] [2024-06-27 23:00:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:27,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:27,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 288 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-27 23:00:27,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:27,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:27,439 INFO L124 PetriNetUnfolderBase]: 869/1452 cut-off events. [2024-06-27 23:00:27,439 INFO L125 PetriNetUnfolderBase]: For 3130/3215 co-relation queries the response was YES. [2024-06-27 23:00:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1452 events. 869/1452 cut-off events. For 3130/3215 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7343 event pairs, 314 based on Foata normal form. 17/1448 useless extension candidates. Maximal degree in co-relation 4897. Up to 1249 conditions per place. [2024-06-27 23:00:27,448 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-06-27 23:00:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 444 flow [2024-06-27 23:00:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:00:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:00:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-27 23:00:27,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-27 23:00:27,450 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 288 flow. Second operand 4 states and 107 transitions. [2024-06-27 23:00:27,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 444 flow [2024-06-27 23:00:27,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 421 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:27,456 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 303 flow [2024-06-27 23:00:27,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-27 23:00:27,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 23:00:27,459 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 303 flow [2024-06-27 23:00:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-27 23:00:27,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:27,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:27,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:00:27,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:27,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash -933893920, now seen corresponding path program 1 times [2024-06-27 23:00:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:27,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833582688] [2024-06-27 23:00:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:27,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833582688] [2024-06-27 23:00:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833582688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:27,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:27,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162645738] [2024-06-27 23:00:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:27,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:27,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-27 23:00:27,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:27,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:27,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:27,824 INFO L124 PetriNetUnfolderBase]: 960/1579 cut-off events. [2024-06-27 23:00:27,824 INFO L125 PetriNetUnfolderBase]: For 3759/3764 co-relation queries the response was YES. [2024-06-27 23:00:27,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5387 conditions, 1579 events. 960/1579 cut-off events. For 3759/3764 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8026 event pairs, 294 based on Foata normal form. 10/1584 useless extension candidates. Maximal degree in co-relation 5362. Up to 1329 conditions per place. [2024-06-27 23:00:27,833 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 55 selfloop transitions, 20 changer transitions 0/82 dead transitions. [2024-06-27 23:00:27,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 573 flow [2024-06-27 23:00:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 23:00:27,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 23:00:27,834 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 303 flow. Second operand 5 states and 126 transitions. [2024-06-27 23:00:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 573 flow [2024-06-27 23:00:27,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 82 transitions, 547 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:27,839 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 422 flow [2024-06-27 23:00:27,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-27 23:00:27,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-27 23:00:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 422 flow [2024-06-27 23:00:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-27 23:00:27,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:27,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:27,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:00:27,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:27,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1409483106, now seen corresponding path program 1 times [2024-06-27 23:00:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417404509] [2024-06-27 23:00:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:27,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:27,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:27,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417404509] [2024-06-27 23:00:27,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417404509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:27,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298749108] [2024-06-27 23:00:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:27,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:27,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:27,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-27 23:00:27,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:27,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:27,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:28,164 INFO L124 PetriNetUnfolderBase]: 969/1602 cut-off events. [2024-06-27 23:00:28,164 INFO L125 PetriNetUnfolderBase]: For 5302/5308 co-relation queries the response was YES. [2024-06-27 23:00:28,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6249 conditions, 1602 events. 969/1602 cut-off events. For 5302/5308 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8071 event pairs, 315 based on Foata normal form. 12/1611 useless extension candidates. Maximal degree in co-relation 6222. Up to 1391 conditions per place. [2024-06-27 23:00:28,176 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-27 23:00:28,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 656 flow [2024-06-27 23:00:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 23:00:28,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-27 23:00:28,179 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 422 flow. Second operand 5 states and 122 transitions. [2024-06-27 23:00:28,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 656 flow [2024-06-27 23:00:28,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 631 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:28,188 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 447 flow [2024-06-27 23:00:28,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-27 23:00:28,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 23:00:28,188 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 447 flow [2024-06-27 23:00:28,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-27 23:00:28,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:28,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:28,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:00:28,189 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:28,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash -134710170, now seen corresponding path program 1 times [2024-06-27 23:00:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:28,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126903229] [2024-06-27 23:00:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:28,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:28,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126903229] [2024-06-27 23:00:28,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126903229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:28,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:28,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576945611] [2024-06-27 23:00:28,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:28,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:28,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:28,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:28,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:28,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:28,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:28,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:28,540 INFO L124 PetriNetUnfolderBase]: 1056/1738 cut-off events. [2024-06-27 23:00:28,540 INFO L125 PetriNetUnfolderBase]: For 6754/6762 co-relation queries the response was YES. [2024-06-27 23:00:28,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7050 conditions, 1738 events. 1056/1738 cut-off events. For 6754/6762 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9017 event pairs, 276 based on Foata normal form. 10/1743 useless extension candidates. Maximal degree in co-relation 7021. Up to 1341 conditions per place. [2024-06-27 23:00:28,552 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 41 changer transitions 0/124 dead transitions. [2024-06-27 23:00:28,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 979 flow [2024-06-27 23:00:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 23:00:28,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:00:28,554 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 447 flow. Second operand 9 states and 225 transitions. [2024-06-27 23:00:28,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 979 flow [2024-06-27 23:00:28,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 953 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:28,563 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 637 flow [2024-06-27 23:00:28,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=637, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2024-06-27 23:00:28,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-27 23:00:28,564 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 637 flow [2024-06-27 23:00:28,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:28,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:28,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:00:28,564 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1114055078, now seen corresponding path program 2 times [2024-06-27 23:00:28,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262679505] [2024-06-27 23:00:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:28,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262679505] [2024-06-27 23:00:28,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262679505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:28,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:28,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132418097] [2024-06-27 23:00:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:28,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:28,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:28,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 637 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:28,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:28,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:28,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:28,982 INFO L124 PetriNetUnfolderBase]: 1121/1850 cut-off events. [2024-06-27 23:00:28,983 INFO L125 PetriNetUnfolderBase]: For 9784/9792 co-relation queries the response was YES. [2024-06-27 23:00:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8507 conditions, 1850 events. 1121/1850 cut-off events. For 9784/9792 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9715 event pairs, 279 based on Foata normal form. 10/1855 useless extension candidates. Maximal degree in co-relation 8475. Up to 1469 conditions per place. [2024-06-27 23:00:29,001 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 87 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-27 23:00:29,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 128 transitions, 1205 flow [2024-06-27 23:00:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 23:00:29,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 23:00:29,003 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 637 flow. Second operand 6 states and 160 transitions. [2024-06-27 23:00:29,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 128 transitions, 1205 flow [2024-06-27 23:00:29,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 128 transitions, 1108 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:29,021 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 806 flow [2024-06-27 23:00:29,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=806, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2024-06-27 23:00:29,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-27 23:00:29,022 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 806 flow [2024-06-27 23:00:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:29,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:29,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:29,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:00:29,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:29,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1114060658, now seen corresponding path program 3 times [2024-06-27 23:00:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727288487] [2024-06-27 23:00:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:29,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:29,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727288487] [2024-06-27 23:00:29,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727288487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:29,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:29,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:29,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148038132] [2024-06-27 23:00:29,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:29,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:29,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:29,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:29,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 806 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:29,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:29,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:29,425 INFO L124 PetriNetUnfolderBase]: 1120/1852 cut-off events. [2024-06-27 23:00:29,425 INFO L125 PetriNetUnfolderBase]: For 11683/11696 co-relation queries the response was YES. [2024-06-27 23:00:29,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8989 conditions, 1852 events. 1120/1852 cut-off events. For 11683/11696 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9765 event pairs, 279 based on Foata normal form. 14/1861 useless extension candidates. Maximal degree in co-relation 8954. Up to 1471 conditions per place. [2024-06-27 23:00:29,440 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 88 selfloop transitions, 40 changer transitions 0/135 dead transitions. [2024-06-27 23:00:29,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 1269 flow [2024-06-27 23:00:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 23:00:29,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 23:00:29,442 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 806 flow. Second operand 8 states and 201 transitions. [2024-06-27 23:00:29,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 1269 flow [2024-06-27 23:00:29,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 135 transitions, 1219 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:29,461 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 894 flow [2024-06-27 23:00:29,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=894, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-06-27 23:00:29,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-27 23:00:29,462 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 894 flow [2024-06-27 23:00:29,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:29,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:29,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:29,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:00:29,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:29,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:29,464 INFO L85 PathProgramCache]: Analyzing trace with hash -744578988, now seen corresponding path program 4 times [2024-06-27 23:00:29,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:29,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961289162] [2024-06-27 23:00:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:29,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961289162] [2024-06-27 23:00:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961289162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:29,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:29,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:29,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144073045] [2024-06-27 23:00:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:29,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:29,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:29,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:29,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:29,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:29,862 INFO L124 PetriNetUnfolderBase]: 1115/1859 cut-off events. [2024-06-27 23:00:29,862 INFO L125 PetriNetUnfolderBase]: For 12673/12686 co-relation queries the response was YES. [2024-06-27 23:00:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9342 conditions, 1859 events. 1115/1859 cut-off events. For 12673/12686 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9755 event pairs, 324 based on Foata normal form. 12/1866 useless extension candidates. Maximal degree in co-relation 9305. Up to 1553 conditions per place. [2024-06-27 23:00:29,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 113 selfloop transitions, 30 changer transitions 0/150 dead transitions. [2024-06-27 23:00:29,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 150 transitions, 1482 flow [2024-06-27 23:00:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 23:00:29,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 23:00:29,879 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 894 flow. Second operand 8 states and 189 transitions. [2024-06-27 23:00:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 150 transitions, 1482 flow [2024-06-27 23:00:29,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1346 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:29,911 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 1111 flow [2024-06-27 23:00:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1111, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-27 23:00:29,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-27 23:00:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 1111 flow [2024-06-27 23:00:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:29,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:00:29,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:29,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-27 23:00:29,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781450065] [2024-06-27 23:00:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:30,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:30,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781450065] [2024-06-27 23:00:30,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781450065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:30,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:30,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:30,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460628823] [2024-06-27 23:00:30,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:30,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:30,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:30,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 1111 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:30,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:30,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:30,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:30,294 INFO L124 PetriNetUnfolderBase]: 1040/1735 cut-off events. [2024-06-27 23:00:30,294 INFO L125 PetriNetUnfolderBase]: For 14400/14411 co-relation queries the response was YES. [2024-06-27 23:00:30,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9116 conditions, 1735 events. 1040/1735 cut-off events. For 14400/14411 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9122 event pairs, 289 based on Foata normal form. 19/1736 useless extension candidates. Maximal degree in co-relation 9073. Up to 1460 conditions per place. [2024-06-27 23:00:30,309 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2024-06-27 23:00:30,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1481 flow [2024-06-27 23:00:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 23:00:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-27 23:00:30,311 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 1111 flow. Second operand 7 states and 151 transitions. [2024-06-27 23:00:30,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1481 flow [2024-06-27 23:00:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 138 transitions, 1425 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:30,330 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 1198 flow [2024-06-27 23:00:30,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1198, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2024-06-27 23:00:30,331 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-27 23:00:30,331 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 1198 flow [2024-06-27 23:00:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:30,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:30,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:00:30,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:30,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1432574657, now seen corresponding path program 1 times [2024-06-27 23:00:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539329042] [2024-06-27 23:00:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539329042] [2024-06-27 23:00:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539329042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:30,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:30,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:30,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557374514] [2024-06-27 23:00:30,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:30,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:30,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 1198 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:30,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:30,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:30,706 INFO L124 PetriNetUnfolderBase]: 1075/1786 cut-off events. [2024-06-27 23:00:30,706 INFO L125 PetriNetUnfolderBase]: For 18547/18628 co-relation queries the response was YES. [2024-06-27 23:00:30,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9884 conditions, 1786 events. 1075/1786 cut-off events. For 18547/18628 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9459 event pairs, 183 based on Foata normal form. 31/1772 useless extension candidates. Maximal degree in co-relation 9838. Up to 1387 conditions per place. [2024-06-27 23:00:30,719 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 108 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-27 23:00:30,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 1660 flow [2024-06-27 23:00:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 23:00:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 23:00:30,721 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 1198 flow. Second operand 6 states and 154 transitions. [2024-06-27 23:00:30,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 1660 flow [2024-06-27 23:00:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1596 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:30,747 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1269 flow [2024-06-27 23:00:30,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1269, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-27 23:00:30,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-27 23:00:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1269 flow [2024-06-27 23:00:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:00:30,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1543279067, now seen corresponding path program 2 times [2024-06-27 23:00:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812082186] [2024-06-27 23:00:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:30,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:30,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812082186] [2024-06-27 23:00:30,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812082186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:30,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:30,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:30,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302205610] [2024-06-27 23:00:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:30,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:30,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:30,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:30,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1269 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:30,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:30,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:30,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:31,109 INFO L124 PetriNetUnfolderBase]: 1087/1804 cut-off events. [2024-06-27 23:00:31,109 INFO L125 PetriNetUnfolderBase]: For 21090/21180 co-relation queries the response was YES. [2024-06-27 23:00:31,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10274 conditions, 1804 events. 1087/1804 cut-off events. For 21090/21180 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9543 event pairs, 256 based on Foata normal form. 27/1780 useless extension candidates. Maximal degree in co-relation 10230. Up to 1485 conditions per place. [2024-06-27 23:00:31,122 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 108 selfloop transitions, 29 changer transitions 0/156 dead transitions. [2024-06-27 23:00:31,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1645 flow [2024-06-27 23:00:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 23:00:31,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 23:00:31,124 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1269 flow. Second operand 6 states and 151 transitions. [2024-06-27 23:00:31,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1645 flow [2024-06-27 23:00:31,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1579 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:31,151 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1308 flow [2024-06-27 23:00:31,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1308, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-27 23:00:31,152 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 23:00:31,152 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1308 flow [2024-06-27 23:00:31,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:31,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:31,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:00:31,152 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:31,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash 175965413, now seen corresponding path program 3 times [2024-06-27 23:00:31,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:31,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019918531] [2024-06-27 23:00:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:31,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:31,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019918531] [2024-06-27 23:00:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019918531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:31,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953485825] [2024-06-27 23:00:31,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:31,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:31,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:31,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:31,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1308 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:31,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:31,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:31,528 INFO L124 PetriNetUnfolderBase]: 1074/1787 cut-off events. [2024-06-27 23:00:31,528 INFO L125 PetriNetUnfolderBase]: For 21590/21685 co-relation queries the response was YES. [2024-06-27 23:00:31,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 1787 events. 1074/1787 cut-off events. For 21590/21685 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9427 event pairs, 179 based on Foata normal form. 36/1775 useless extension candidates. Maximal degree in co-relation 10116. Up to 1443 conditions per place. [2024-06-27 23:00:31,545 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-27 23:00:31,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 152 transitions, 1630 flow [2024-06-27 23:00:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 23:00:31,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 23:00:31,547 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1308 flow. Second operand 5 states and 130 transitions. [2024-06-27 23:00:31,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 152 transitions, 1630 flow [2024-06-27 23:00:31,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1549 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:31,580 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1297 flow [2024-06-27 23:00:31,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1297, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-27 23:00:31,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-27 23:00:31,582 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1297 flow [2024-06-27 23:00:31,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:31,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:31,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:31,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:00:31,583 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:31,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:31,583 INFO L85 PathProgramCache]: Analyzing trace with hash 176150111, now seen corresponding path program 1 times [2024-06-27 23:00:31,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:31,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087705293] [2024-06-27 23:00:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:31,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:31,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087705293] [2024-06-27 23:00:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087705293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714323067] [2024-06-27 23:00:31,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:31,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:31,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:31,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1297 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:31,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:31,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:31,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:32,009 INFO L124 PetriNetUnfolderBase]: 1199/1974 cut-off events. [2024-06-27 23:00:32,009 INFO L125 PetriNetUnfolderBase]: For 23427/23439 co-relation queries the response was YES. [2024-06-27 23:00:32,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10895 conditions, 1974 events. 1199/1974 cut-off events. For 23427/23439 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10356 event pairs, 276 based on Foata normal form. 34/2003 useless extension candidates. Maximal degree in co-relation 10848. Up to 1583 conditions per place. [2024-06-27 23:00:32,028 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 121 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-06-27 23:00:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 159 transitions, 1741 flow [2024-06-27 23:00:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 23:00:32,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 23:00:32,030 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1297 flow. Second operand 6 states and 151 transitions. [2024-06-27 23:00:32,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 159 transitions, 1741 flow [2024-06-27 23:00:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1678 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:32,071 INFO L231 Difference]: Finished difference. Result has 104 places, 137 transitions, 1379 flow [2024-06-27 23:00:32,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1379, PETRI_PLACES=104, PETRI_TRANSITIONS=137} [2024-06-27 23:00:32,072 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 23:00:32,072 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 137 transitions, 1379 flow [2024-06-27 23:00:32,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-27 23:00:32,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:32,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:00:32,073 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:32,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:32,073 INFO L85 PathProgramCache]: Analyzing trace with hash -685575289, now seen corresponding path program 1 times [2024-06-27 23:00:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:32,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962238868] [2024-06-27 23:00:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:32,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:32,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962238868] [2024-06-27 23:00:32,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962238868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:32,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:32,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179590424] [2024-06-27 23:00:32,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:32,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:32,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:32,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:32,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 137 transitions, 1379 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:32,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:32,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:32,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:32,674 INFO L124 PetriNetUnfolderBase]: 1860/3158 cut-off events. [2024-06-27 23:00:32,674 INFO L125 PetriNetUnfolderBase]: For 45680/45692 co-relation queries the response was YES. [2024-06-27 23:00:32,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 3158 events. 1860/3158 cut-off events. For 45680/45692 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19102 event pairs, 385 based on Foata normal form. 52/3205 useless extension candidates. Maximal degree in co-relation 17307. Up to 1320 conditions per place. [2024-06-27 23:00:32,701 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 136 selfloop transitions, 71 changer transitions 0/214 dead transitions. [2024-06-27 23:00:32,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 214 transitions, 2398 flow [2024-06-27 23:00:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 23:00:32,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-06-27 23:00:32,703 INFO L175 Difference]: Start difference. First operand has 104 places, 137 transitions, 1379 flow. Second operand 9 states and 242 transitions. [2024-06-27 23:00:32,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 214 transitions, 2398 flow [2024-06-27 23:00:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 214 transitions, 2307 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:32,764 INFO L231 Difference]: Finished difference. Result has 111 places, 146 transitions, 1615 flow [2024-06-27 23:00:32,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1615, PETRI_PLACES=111, PETRI_TRANSITIONS=146} [2024-06-27 23:00:32,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-27 23:00:32,781 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 146 transitions, 1615 flow [2024-06-27 23:00:32,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:32,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:32,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:32,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:00:32,781 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:32,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash -597009529, now seen corresponding path program 2 times [2024-06-27 23:00:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:32,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711240751] [2024-06-27 23:00:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711240751] [2024-06-27 23:00:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711240751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749400954] [2024-06-27 23:00:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:32,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 146 transitions, 1615 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:32,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:32,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:32,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:33,406 INFO L124 PetriNetUnfolderBase]: 2316/3960 cut-off events. [2024-06-27 23:00:33,407 INFO L125 PetriNetUnfolderBase]: For 65019/65031 co-relation queries the response was YES. [2024-06-27 23:00:33,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22326 conditions, 3960 events. 2316/3960 cut-off events. For 65019/65031 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25400 event pairs, 789 based on Foata normal form. 52/4007 useless extension candidates. Maximal degree in co-relation 22275. Up to 2573 conditions per place. [2024-06-27 23:00:33,437 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 131 selfloop transitions, 73 changer transitions 0/211 dead transitions. [2024-06-27 23:00:33,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 211 transitions, 2523 flow [2024-06-27 23:00:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 23:00:33,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 23:00:33,439 INFO L175 Difference]: Start difference. First operand has 111 places, 146 transitions, 1615 flow. Second operand 10 states and 260 transitions. [2024-06-27 23:00:33,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 211 transitions, 2523 flow [2024-06-27 23:00:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 211 transitions, 2387 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:33,532 INFO L231 Difference]: Finished difference. Result has 119 places, 151 transitions, 1739 flow [2024-06-27 23:00:33,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1739, PETRI_PLACES=119, PETRI_TRANSITIONS=151} [2024-06-27 23:00:33,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 23:00:33,532 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 151 transitions, 1739 flow [2024-06-27 23:00:33,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:33,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:33,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:33,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:00:33,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -597005809, now seen corresponding path program 3 times [2024-06-27 23:00:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616760301] [2024-06-27 23:00:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:33,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616760301] [2024-06-27 23:00:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616760301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:33,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:33,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862457862] [2024-06-27 23:00:33,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:33,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:33,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 151 transitions, 1739 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:33,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:33,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:33,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:34,156 INFO L124 PetriNetUnfolderBase]: 2371/4045 cut-off events. [2024-06-27 23:00:34,156 INFO L125 PetriNetUnfolderBase]: For 70066/70078 co-relation queries the response was YES. [2024-06-27 23:00:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 4045 events. 2371/4045 cut-off events. For 70066/70078 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26059 event pairs, 874 based on Foata normal form. 60/4092 useless extension candidates. Maximal degree in co-relation 22495. Up to 3166 conditions per place. [2024-06-27 23:00:34,191 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 121 selfloop transitions, 72 changer transitions 0/200 dead transitions. [2024-06-27 23:00:34,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 200 transitions, 2439 flow [2024-06-27 23:00:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 23:00:34,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225 [2024-06-27 23:00:34,193 INFO L175 Difference]: Start difference. First operand has 119 places, 151 transitions, 1739 flow. Second operand 10 states and 249 transitions. [2024-06-27 23:00:34,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 200 transitions, 2439 flow [2024-06-27 23:00:34,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 200 transitions, 2303 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:34,295 INFO L231 Difference]: Finished difference. Result has 123 places, 153 transitions, 1804 flow [2024-06-27 23:00:34,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1804, PETRI_PLACES=123, PETRI_TRANSITIONS=153} [2024-06-27 23:00:34,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-27 23:00:34,296 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 153 transitions, 1804 flow [2024-06-27 23:00:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:34,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:34,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:34,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:00:34,297 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:34,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1160109669, now seen corresponding path program 4 times [2024-06-27 23:00:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:34,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608228283] [2024-06-27 23:00:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:34,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608228283] [2024-06-27 23:00:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608228283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:34,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085373187] [2024-06-27 23:00:34,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:34,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:34,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 153 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:34,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:34,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:35,040 INFO L124 PetriNetUnfolderBase]: 2558/4375 cut-off events. [2024-06-27 23:00:35,040 INFO L125 PetriNetUnfolderBase]: For 76176/76188 co-relation queries the response was YES. [2024-06-27 23:00:35,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 4375 events. 2558/4375 cut-off events. For 76176/76188 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28718 event pairs, 983 based on Foata normal form. 60/4430 useless extension candidates. Maximal degree in co-relation 24213. Up to 3559 conditions per place. [2024-06-27 23:00:35,079 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 53 changer transitions 0/192 dead transitions. [2024-06-27 23:00:35,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 192 transitions, 2410 flow [2024-06-27 23:00:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 23:00:35,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 23:00:35,081 INFO L175 Difference]: Start difference. First operand has 123 places, 153 transitions, 1804 flow. Second operand 7 states and 184 transitions. [2024-06-27 23:00:35,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 192 transitions, 2410 flow [2024-06-27 23:00:35,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 192 transitions, 2237 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 23:00:35,197 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1801 flow [2024-06-27 23:00:35,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1801, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-27 23:00:35,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 23:00:35,198 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1801 flow [2024-06-27 23:00:35,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:35,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:35,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:35,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:00:35,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:35,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1165472049, now seen corresponding path program 5 times [2024-06-27 23:00:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087121743] [2024-06-27 23:00:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:35,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:35,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087121743] [2024-06-27 23:00:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087121743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:35,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927507209] [2024-06-27 23:00:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:35,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:35,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:35,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1801 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:35,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:35,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:35,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:35,933 INFO L124 PetriNetUnfolderBase]: 2695/4620 cut-off events. [2024-06-27 23:00:35,934 INFO L125 PetriNetUnfolderBase]: For 82909/82921 co-relation queries the response was YES. [2024-06-27 23:00:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25323 conditions, 4620 events. 2695/4620 cut-off events. For 82909/82921 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30722 event pairs, 1037 based on Foata normal form. 60/4675 useless extension candidates. Maximal degree in co-relation 25266. Up to 3844 conditions per place. [2024-06-27 23:00:35,990 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 55 changer transitions 3/199 dead transitions. [2024-06-27 23:00:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 199 transitions, 2435 flow [2024-06-27 23:00:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 23:00:35,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 23:00:35,993 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1801 flow. Second operand 9 states and 226 transitions. [2024-06-27 23:00:35,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 199 transitions, 2435 flow [2024-06-27 23:00:36,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 199 transitions, 2302 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:36,221 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1829 flow [2024-06-27 23:00:36,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1829, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2024-06-27 23:00:36,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 23:00:36,221 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1829 flow [2024-06-27 23:00:36,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:36,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:36,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:00:36,222 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:36,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1159961799, now seen corresponding path program 6 times [2024-06-27 23:00:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:36,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551689396] [2024-06-27 23:00:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:36,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:36,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551689396] [2024-06-27 23:00:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551689396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:36,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:36,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:36,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849254246] [2024-06-27 23:00:36,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:36,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:36,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1829 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:36,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:36,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:36,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:37,127 INFO L124 PetriNetUnfolderBase]: 3010/5149 cut-off events. [2024-06-27 23:00:37,127 INFO L125 PetriNetUnfolderBase]: For 96987/96999 co-relation queries the response was YES. [2024-06-27 23:00:37,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28199 conditions, 5149 events. 3010/5149 cut-off events. For 96987/96999 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34988 event pairs, 1024 based on Foata normal form. 52/5196 useless extension candidates. Maximal degree in co-relation 28141. Up to 3354 conditions per place. [2024-06-27 23:00:37,167 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 146 selfloop transitions, 55 changer transitions 0/208 dead transitions. [2024-06-27 23:00:37,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 208 transitions, 2622 flow [2024-06-27 23:00:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:37,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-27 23:00:37,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 23:00:37,169 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1829 flow. Second operand 7 states and 190 transitions. [2024-06-27 23:00:37,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 208 transitions, 2622 flow [2024-06-27 23:00:37,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 208 transitions, 2480 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:37,351 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1939 flow [2024-06-27 23:00:37,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1939, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-27 23:00:37,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-27 23:00:37,352 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1939 flow [2024-06-27 23:00:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:37,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:37,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:00:37,352 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1165687251, now seen corresponding path program 1 times [2024-06-27 23:00:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319270647] [2024-06-27 23:00:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:37,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:37,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319270647] [2024-06-27 23:00:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319270647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:37,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:37,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785545294] [2024-06-27 23:00:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:37,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:37,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:37,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:37,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:37,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:38,289 INFO L124 PetriNetUnfolderBase]: 3139/5394 cut-off events. [2024-06-27 23:00:38,289 INFO L125 PetriNetUnfolderBase]: For 105478/105490 co-relation queries the response was YES. [2024-06-27 23:00:38,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29559 conditions, 5394 events. 3139/5394 cut-off events. For 105478/105490 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37184 event pairs, 1179 based on Foata normal form. 52/5441 useless extension candidates. Maximal degree in co-relation 29499. Up to 3945 conditions per place. [2024-06-27 23:00:38,336 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 138 selfloop transitions, 64 changer transitions 3/212 dead transitions. [2024-06-27 23:00:38,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 212 transitions, 2642 flow [2024-06-27 23:00:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 23:00:38,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 23:00:38,338 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1939 flow. Second operand 9 states and 231 transitions. [2024-06-27 23:00:38,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 212 transitions, 2642 flow [2024-06-27 23:00:38,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 212 transitions, 2463 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:38,537 INFO L231 Difference]: Finished difference. Result has 131 places, 164 transitions, 1951 flow [2024-06-27 23:00:38,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1951, PETRI_PLACES=131, PETRI_TRANSITIONS=164} [2024-06-27 23:00:38,538 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-27 23:00:38,538 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 164 transitions, 1951 flow [2024-06-27 23:00:38,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:38,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:00:38,538 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:38,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1719167379, now seen corresponding path program 7 times [2024-06-27 23:00:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:38,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906897991] [2024-06-27 23:00:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906897991] [2024-06-27 23:00:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906897991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:38,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220083226] [2024-06-27 23:00:38,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:38,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:38,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 164 transitions, 1951 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:38,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:38,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:38,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:39,353 INFO L124 PetriNetUnfolderBase]: 3172/5455 cut-off events. [2024-06-27 23:00:39,353 INFO L125 PetriNetUnfolderBase]: For 104218/104230 co-relation queries the response was YES. [2024-06-27 23:00:39,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29659 conditions, 5455 events. 3172/5455 cut-off events. For 104218/104230 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37679 event pairs, 1298 based on Foata normal form. 26/5476 useless extension candidates. Maximal degree in co-relation 29599. Up to 4880 conditions per place. [2024-06-27 23:00:39,483 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 166 selfloop transitions, 31 changer transitions 0/204 dead transitions. [2024-06-27 23:00:39,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 204 transitions, 2482 flow [2024-06-27 23:00:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 23:00:39,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 23:00:39,492 INFO L175 Difference]: Start difference. First operand has 131 places, 164 transitions, 1951 flow. Second operand 9 states and 212 transitions. [2024-06-27 23:00:39,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 204 transitions, 2482 flow [2024-06-27 23:00:39,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 204 transitions, 2311 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:39,703 INFO L231 Difference]: Finished difference. Result has 133 places, 165 transitions, 1871 flow [2024-06-27 23:00:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=133, PETRI_TRANSITIONS=165} [2024-06-27 23:00:39,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-27 23:00:39,704 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 165 transitions, 1871 flow [2024-06-27 23:00:39,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:39,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:39,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:39,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:00:39,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:39,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1975883091, now seen corresponding path program 2 times [2024-06-27 23:00:39,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:39,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493785383] [2024-06-27 23:00:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:39,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:39,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:39,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493785383] [2024-06-27 23:00:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493785383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:39,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927403718] [2024-06-27 23:00:39,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:39,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:39,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:39,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 165 transitions, 1871 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:39,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:39,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:39,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:40,519 INFO L124 PetriNetUnfolderBase]: 3230/5563 cut-off events. [2024-06-27 23:00:40,519 INFO L125 PetriNetUnfolderBase]: For 107741/107753 co-relation queries the response was YES. [2024-06-27 23:00:40,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29864 conditions, 5563 events. 3230/5563 cut-off events. For 107741/107753 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38568 event pairs, 1303 based on Foata normal form. 22/5580 useless extension candidates. Maximal degree in co-relation 29803. Up to 4891 conditions per place. [2024-06-27 23:00:40,558 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 173 selfloop transitions, 34 changer transitions 0/214 dead transitions. [2024-06-27 23:00:40,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 214 transitions, 2458 flow [2024-06-27 23:00:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 23:00:40,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 23:00:40,561 INFO L175 Difference]: Start difference. First operand has 133 places, 165 transitions, 1871 flow. Second operand 10 states and 235 transitions. [2024-06-27 23:00:40,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 214 transitions, 2458 flow [2024-06-27 23:00:40,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 214 transitions, 2381 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:40,724 INFO L231 Difference]: Finished difference. Result has 137 places, 168 transitions, 1912 flow [2024-06-27 23:00:40,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1912, PETRI_PLACES=137, PETRI_TRANSITIONS=168} [2024-06-27 23:00:40,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 23:00:40,724 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 168 transitions, 1912 flow [2024-06-27 23:00:40,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:40,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:40,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:40,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:00:40,725 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:40,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1985079861, now seen corresponding path program 3 times [2024-06-27 23:00:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:40,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17454315] [2024-06-27 23:00:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:40,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:40,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17454315] [2024-06-27 23:00:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17454315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:40,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:40,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307500593] [2024-06-27 23:00:40,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:40,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:40,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:40,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 168 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:40,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:40,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:40,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:41,659 INFO L124 PetriNetUnfolderBase]: 3210/5541 cut-off events. [2024-06-27 23:00:41,659 INFO L125 PetriNetUnfolderBase]: For 110046/110058 co-relation queries the response was YES. [2024-06-27 23:00:41,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29650 conditions, 5541 events. 3210/5541 cut-off events. For 110046/110058 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38493 event pairs, 1260 based on Foata normal form. 22/5558 useless extension candidates. Maximal degree in co-relation 29587. Up to 4478 conditions per place. [2024-06-27 23:00:41,709 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 41 changer transitions 0/212 dead transitions. [2024-06-27 23:00:41,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 2421 flow [2024-06-27 23:00:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 23:00:41,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 23:00:41,710 INFO L175 Difference]: Start difference. First operand has 137 places, 168 transitions, 1912 flow. Second operand 9 states and 214 transitions. [2024-06-27 23:00:41,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 2421 flow [2024-06-27 23:00:41,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 212 transitions, 2339 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:41,916 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1888 flow [2024-06-27 23:00:41,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-27 23:00:41,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 23:00:41,917 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1888 flow [2024-06-27 23:00:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-27 23:00:41,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:41,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:41,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:00:41,918 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:41,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:41,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1369809045, now seen corresponding path program 1 times [2024-06-27 23:00:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:41,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430860766] [2024-06-27 23:00:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430860766] [2024-06-27 23:00:42,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430860766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:42,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:42,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:42,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689062197] [2024-06-27 23:00:42,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:42,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:42,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:42,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:42,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1888 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:42,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:42,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:42,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:42,687 INFO L124 PetriNetUnfolderBase]: 3236/5599 cut-off events. [2024-06-27 23:00:42,687 INFO L125 PetriNetUnfolderBase]: For 113502/113505 co-relation queries the response was YES. [2024-06-27 23:00:42,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30346 conditions, 5599 events. 3236/5599 cut-off events. For 113502/113505 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39145 event pairs, 1295 based on Foata normal form. 4/5598 useless extension candidates. Maximal degree in co-relation 30281. Up to 5111 conditions per place. [2024-06-27 23:00:42,737 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 27 changer transitions 2/205 dead transitions. [2024-06-27 23:00:42,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 205 transitions, 2729 flow [2024-06-27 23:00:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 23:00:42,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:00:42,738 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1888 flow. Second operand 5 states and 125 transitions. [2024-06-27 23:00:42,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 205 transitions, 2729 flow [2024-06-27 23:00:42,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 205 transitions, 2608 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 23:00:42,931 INFO L231 Difference]: Finished difference. Result has 139 places, 184 transitions, 2111 flow [2024-06-27 23:00:42,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2111, PETRI_PLACES=139, PETRI_TRANSITIONS=184} [2024-06-27 23:00:42,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-27 23:00:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 184 transitions, 2111 flow [2024-06-27 23:00:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-27 23:00:42,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:42,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:00:42,933 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-27 23:00:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:42,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606804818] [2024-06-27 23:00:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606804818] [2024-06-27 23:00:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606804818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:43,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:43,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:00:43,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419045555] [2024-06-27 23:00:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:00:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:00:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:00:43,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 23:00:43,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 184 transitions, 2111 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:43,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:43,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 23:00:43,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:43,777 INFO L124 PetriNetUnfolderBase]: 2977/5188 cut-off events. [2024-06-27 23:00:43,778 INFO L125 PetriNetUnfolderBase]: For 126350/126371 co-relation queries the response was YES. [2024-06-27 23:00:43,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29321 conditions, 5188 events. 2977/5188 cut-off events. For 126350/126371 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 36186 event pairs, 1169 based on Foata normal form. 36/5190 useless extension candidates. Maximal degree in co-relation 29255. Up to 4544 conditions per place. [2024-06-27 23:00:43,819 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 148 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-27 23:00:43,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 206 transitions, 2666 flow [2024-06-27 23:00:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 23:00:43,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 23:00:43,824 INFO L175 Difference]: Start difference. First operand has 139 places, 184 transitions, 2111 flow. Second operand 6 states and 149 transitions. [2024-06-27 23:00:43,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 206 transitions, 2666 flow [2024-06-27 23:00:44,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 206 transitions, 2612 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-27 23:00:44,027 INFO L231 Difference]: Finished difference. Result has 145 places, 186 transitions, 2187 flow [2024-06-27 23:00:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2187, PETRI_PLACES=145, PETRI_TRANSITIONS=186} [2024-06-27 23:00:44,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 23:00:44,028 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 186 transitions, 2187 flow [2024-06-27 23:00:44,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:00:44,029 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:44,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1385967847, now seen corresponding path program 1 times [2024-06-27 23:00:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:44,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423501640] [2024-06-27 23:00:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:44,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:44,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423501640] [2024-06-27 23:00:44,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423501640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:44,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:44,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322192541] [2024-06-27 23:00:44,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:44,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:44,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:44,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 186 transitions, 2187 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:44,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:44,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:44,694 INFO L124 PetriNetUnfolderBase]: 3095/5339 cut-off events. [2024-06-27 23:00:44,694 INFO L125 PetriNetUnfolderBase]: For 124894/124903 co-relation queries the response was YES. [2024-06-27 23:00:44,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30449 conditions, 5339 events. 3095/5339 cut-off events. For 124894/124903 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36766 event pairs, 1202 based on Foata normal form. 9/5345 useless extension candidates. Maximal degree in co-relation 30380. Up to 4909 conditions per place. [2024-06-27 23:00:44,739 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 186 selfloop transitions, 17 changer transitions 0/210 dead transitions. [2024-06-27 23:00:44,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 210 transitions, 2711 flow [2024-06-27 23:00:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 23:00:44,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:00:44,740 INFO L175 Difference]: Start difference. First operand has 145 places, 186 transitions, 2187 flow. Second operand 6 states and 138 transitions. [2024-06-27 23:00:44,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 210 transitions, 2711 flow [2024-06-27 23:00:44,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 210 transitions, 2619 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:44,980 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 2191 flow [2024-06-27 23:00:44,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2024-06-27 23:00:44,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 23:00:44,980 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 2191 flow [2024-06-27 23:00:44,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:44,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:44,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:44,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:00:44,981 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:44,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2025313087, now seen corresponding path program 2 times [2024-06-27 23:00:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:44,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359308159] [2024-06-27 23:00:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:44,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:45,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359308159] [2024-06-27 23:00:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359308159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:45,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:45,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239228444] [2024-06-27 23:00:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:45,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:45,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:45,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 2191 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:45,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:45,810 INFO L124 PetriNetUnfolderBase]: 3100/5341 cut-off events. [2024-06-27 23:00:45,811 INFO L125 PetriNetUnfolderBase]: For 131369/131373 co-relation queries the response was YES. [2024-06-27 23:00:45,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30586 conditions, 5341 events. 3100/5341 cut-off events. For 131369/131373 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36704 event pairs, 1207 based on Foata normal form. 2/5338 useless extension candidates. Maximal degree in co-relation 30515. Up to 4903 conditions per place. [2024-06-27 23:00:45,863 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 182 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-27 23:00:45,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 214 transitions, 2853 flow [2024-06-27 23:00:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:00:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:00:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-27 23:00:45,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 23:00:45,864 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 2191 flow. Second operand 5 states and 117 transitions. [2024-06-27 23:00:45,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 214 transitions, 2853 flow [2024-06-27 23:00:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2809 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:46,089 INFO L231 Difference]: Finished difference. Result has 151 places, 200 transitions, 2359 flow [2024-06-27 23:00:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2359, PETRI_PLACES=151, PETRI_TRANSITIONS=200} [2024-06-27 23:00:46,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-27 23:00:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 200 transitions, 2359 flow [2024-06-27 23:00:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:46,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:00:46,090 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2025301927, now seen corresponding path program 3 times [2024-06-27 23:00:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427732979] [2024-06-27 23:00:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427732979] [2024-06-27 23:00:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427732979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:46,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:46,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:46,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492314050] [2024-06-27 23:00:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:46,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:46,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:46,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 200 transitions, 2359 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:46,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:46,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:46,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:46,881 INFO L124 PetriNetUnfolderBase]: 3097/5340 cut-off events. [2024-06-27 23:00:46,882 INFO L125 PetriNetUnfolderBase]: For 138000/138010 co-relation queries the response was YES. [2024-06-27 23:00:46,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30869 conditions, 5340 events. 3097/5340 cut-off events. For 138000/138010 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36753 event pairs, 1198 based on Foata normal form. 9/5346 useless extension candidates. Maximal degree in co-relation 30796. Up to 4900 conditions per place. [2024-06-27 23:00:46,923 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 187 selfloop transitions, 27 changer transitions 0/221 dead transitions. [2024-06-27 23:00:46,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 2865 flow [2024-06-27 23:00:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:00:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:00:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 23:00:46,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 23:00:46,924 INFO L175 Difference]: Start difference. First operand has 151 places, 200 transitions, 2359 flow. Second operand 7 states and 157 transitions. [2024-06-27 23:00:46,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 221 transitions, 2865 flow [2024-06-27 23:00:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 221 transitions, 2836 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 23:00:47,208 INFO L231 Difference]: Finished difference. Result has 157 places, 200 transitions, 2394 flow [2024-06-27 23:00:47,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2394, PETRI_PLACES=157, PETRI_TRANSITIONS=200} [2024-06-27 23:00:47,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-27 23:00:47,208 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 200 transitions, 2394 flow [2024-06-27 23:00:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:47,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:47,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:47,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:00:47,209 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:47,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash -63939265, now seen corresponding path program 4 times [2024-06-27 23:00:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:47,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660140187] [2024-06-27 23:00:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:47,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:47,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660140187] [2024-06-27 23:00:47,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660140187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:47,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:47,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:47,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428443366] [2024-06-27 23:00:47,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:47,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:47,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:00:47,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 200 transitions, 2394 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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) [2024-06-27 23:00:47,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:47,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:00:47,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:47,998 INFO L124 PetriNetUnfolderBase]: 3094/5337 cut-off events. [2024-06-27 23:00:47,998 INFO L125 PetriNetUnfolderBase]: For 144724/144728 co-relation queries the response was YES. [2024-06-27 23:00:48,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31131 conditions, 5337 events. 3094/5337 cut-off events. For 144724/144728 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36724 event pairs, 1205 based on Foata normal form. 2/5334 useless extension candidates. Maximal degree in co-relation 31055. Up to 4890 conditions per place. [2024-06-27 23:00:48,061 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 181 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-27 23:00:48,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 222 transitions, 2958 flow [2024-06-27 23:00:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:00:48,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:00:48,063 INFO L175 Difference]: Start difference. First operand has 157 places, 200 transitions, 2394 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:00:48,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 222 transitions, 2958 flow [2024-06-27 23:00:48,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 222 transitions, 2900 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:48,325 INFO L231 Difference]: Finished difference. Result has 162 places, 209 transitions, 2522 flow [2024-06-27 23:00:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2522, PETRI_PLACES=162, PETRI_TRANSITIONS=209} [2024-06-27 23:00:48,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 23:00:48,325 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 209 transitions, 2522 flow [2024-06-27 23:00:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 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) [2024-06-27 23:00:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:00:48,326 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1497366085, now seen corresponding path program 1 times [2024-06-27 23:00:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:48,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508471056] [2024-06-27 23:00:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:48,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508471056] [2024-06-27 23:00:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508471056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:48,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:48,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329676443] [2024-06-27 23:00:48,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:48,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:48,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 209 transitions, 2522 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:49,077 INFO L124 PetriNetUnfolderBase]: 3101/5352 cut-off events. [2024-06-27 23:00:49,078 INFO L125 PetriNetUnfolderBase]: For 153148/153151 co-relation queries the response was YES. [2024-06-27 23:00:49,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32162 conditions, 5352 events. 3101/5352 cut-off events. For 153148/153151 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36897 event pairs, 1200 based on Foata normal form. 5/5354 useless extension candidates. Maximal degree in co-relation 32083. Up to 4883 conditions per place. [2024-06-27 23:00:49,125 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 195 selfloop transitions, 35 changer transitions 0/237 dead transitions. [2024-06-27 23:00:49,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 237 transitions, 3315 flow [2024-06-27 23:00:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 23:00:49,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:00:49,126 INFO L175 Difference]: Start difference. First operand has 162 places, 209 transitions, 2522 flow. Second operand 6 states and 144 transitions. [2024-06-27 23:00:49,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 237 transitions, 3315 flow [2024-06-27 23:00:49,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 237 transitions, 3232 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:49,375 INFO L231 Difference]: Finished difference. Result has 166 places, 216 transitions, 2647 flow [2024-06-27 23:00:49,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2647, PETRI_PLACES=166, PETRI_TRANSITIONS=216} [2024-06-27 23:00:49,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 23:00:49,376 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 216 transitions, 2647 flow [2024-06-27 23:00:49,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:49,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:49,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:00:49,376 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:49,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash -72934972, now seen corresponding path program 1 times [2024-06-27 23:00:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:49,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125434114] [2024-06-27 23:00:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125434114] [2024-06-27 23:00:49,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125434114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:49,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:49,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123860108] [2024-06-27 23:00:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:49,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:49,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 216 transitions, 2647 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:49,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:49,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:49,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:50,306 INFO L124 PetriNetUnfolderBase]: 3098/5350 cut-off events. [2024-06-27 23:00:50,306 INFO L125 PetriNetUnfolderBase]: For 161300/161311 co-relation queries the response was YES. [2024-06-27 23:00:50,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33095 conditions, 5350 events. 3098/5350 cut-off events. For 161300/161311 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36970 event pairs, 1213 based on Foata normal form. 9/5354 useless extension candidates. Maximal degree in co-relation 33014. Up to 4841 conditions per place. [2024-06-27 23:00:50,362 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 187 selfloop transitions, 47 changer transitions 0/241 dead transitions. [2024-06-27 23:00:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 241 transitions, 3405 flow [2024-06-27 23:00:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 23:00:50,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 23:00:50,364 INFO L175 Difference]: Start difference. First operand has 166 places, 216 transitions, 2647 flow. Second operand 6 states and 143 transitions. [2024-06-27 23:00:50,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 241 transitions, 3405 flow [2024-06-27 23:00:50,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 241 transitions, 3281 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:50,660 INFO L231 Difference]: Finished difference. Result has 170 places, 227 transitions, 2856 flow [2024-06-27 23:00:50,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2856, PETRI_PLACES=170, PETRI_TRANSITIONS=227} [2024-06-27 23:00:50,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-27 23:00:50,661 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 227 transitions, 2856 flow [2024-06-27 23:00:50,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:50,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:50,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:00:50,661 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:50,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 299444468, now seen corresponding path program 2 times [2024-06-27 23:00:50,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:50,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987811100] [2024-06-27 23:00:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:50,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987811100] [2024-06-27 23:00:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987811100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:50,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167125114] [2024-06-27 23:00:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:50,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:50,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:50,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 227 transitions, 2856 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:50,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:50,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:50,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:51,541 INFO L124 PetriNetUnfolderBase]: 3092/5342 cut-off events. [2024-06-27 23:00:51,541 INFO L125 PetriNetUnfolderBase]: For 173523/173534 co-relation queries the response was YES. [2024-06-27 23:00:51,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34030 conditions, 5342 events. 3092/5342 cut-off events. For 173523/173534 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 36898 event pairs, 1213 based on Foata normal form. 10/5347 useless extension candidates. Maximal degree in co-relation 33946. Up to 4812 conditions per place. [2024-06-27 23:00:51,600 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 52 changer transitions 0/245 dead transitions. [2024-06-27 23:00:51,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 245 transitions, 3516 flow [2024-06-27 23:00:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 23:00:51,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 23:00:51,601 INFO L175 Difference]: Start difference. First operand has 170 places, 227 transitions, 2856 flow. Second operand 6 states and 148 transitions. [2024-06-27 23:00:51,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 245 transitions, 3516 flow [2024-06-27 23:00:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 245 transitions, 3373 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:51,923 INFO L231 Difference]: Finished difference. Result has 174 places, 227 transitions, 2828 flow [2024-06-27 23:00:51,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2828, PETRI_PLACES=174, PETRI_TRANSITIONS=227} [2024-06-27 23:00:51,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-27 23:00:51,924 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 227 transitions, 2828 flow [2024-06-27 23:00:51,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:51,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:51,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:51,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:00:51,924 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:51,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2123672596, now seen corresponding path program 1 times [2024-06-27 23:00:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:51,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703512199] [2024-06-27 23:00:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:51,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:52,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:52,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703512199] [2024-06-27 23:00:52,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703512199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:52,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:52,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922251271] [2024-06-27 23:00:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:52,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:52,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 227 transitions, 2828 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:52,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:52,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:52,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:52,861 INFO L124 PetriNetUnfolderBase]: 3167/5450 cut-off events. [2024-06-27 23:00:52,861 INFO L125 PetriNetUnfolderBase]: For 192780/192783 co-relation queries the response was YES. [2024-06-27 23:00:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35617 conditions, 5450 events. 3167/5450 cut-off events. For 192780/192783 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 37619 event pairs, 1171 based on Foata normal form. 6/5451 useless extension candidates. Maximal degree in co-relation 35531. Up to 4773 conditions per place. [2024-06-27 23:00:52,922 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 210 selfloop transitions, 45 changer transitions 0/262 dead transitions. [2024-06-27 23:00:52,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 3778 flow [2024-06-27 23:00:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 23:00:52,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 23:00:52,924 INFO L175 Difference]: Start difference. First operand has 174 places, 227 transitions, 2828 flow. Second operand 6 states and 151 transitions. [2024-06-27 23:00:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 3778 flow [2024-06-27 23:00:53,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 262 transitions, 3680 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 23:00:53,302 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 2979 flow [2024-06-27 23:00:53,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2979, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-27 23:00:53,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 23:00:53,303 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 2979 flow [2024-06-27 23:00:53,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:53,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:53,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:00:53,303 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:53,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2126529556, now seen corresponding path program 2 times [2024-06-27 23:00:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:53,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739360565] [2024-06-27 23:00:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:53,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739360565] [2024-06-27 23:00:53,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739360565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:53,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:53,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:00:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957231253] [2024-06-27 23:00:53,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:00:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:00:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:00:53,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 2979 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:53,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:53,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:54,166 INFO L124 PetriNetUnfolderBase]: 3170/5455 cut-off events. [2024-06-27 23:00:54,166 INFO L125 PetriNetUnfolderBase]: For 202657/202660 co-relation queries the response was YES. [2024-06-27 23:00:54,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36084 conditions, 5455 events. 3170/5455 cut-off events. For 202657/202660 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 37673 event pairs, 1213 based on Foata normal form. 6/5456 useless extension candidates. Maximal degree in co-relation 35996. Up to 4979 conditions per place. [2024-06-27 23:00:54,224 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 39 changer transitions 0/255 dead transitions. [2024-06-27 23:00:54,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 255 transitions, 3721 flow [2024-06-27 23:00:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:00:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:00:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 23:00:54,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 23:00:54,225 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 2979 flow. Second operand 6 states and 143 transitions. [2024-06-27 23:00:54,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 255 transitions, 3721 flow [2024-06-27 23:00:54,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 255 transitions, 3621 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 23:00:54,595 INFO L231 Difference]: Finished difference. Result has 182 places, 234 transitions, 3035 flow [2024-06-27 23:00:54,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2024-06-27 23:00:54,595 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 23:00:54,596 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 3035 flow [2024-06-27 23:00:54,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:00:54,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:54,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:54,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:00:54,596 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:54,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash -665244466, now seen corresponding path program 1 times [2024-06-27 23:00:54,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:54,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931238239] [2024-06-27 23:00:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:54,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:54,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931238239] [2024-06-27 23:00:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931238239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088222567] [2024-06-27 23:00:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:54,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:54,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 3035 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:54,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:54,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:54,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:55,424 INFO L124 PetriNetUnfolderBase]: 3199/5500 cut-off events. [2024-06-27 23:00:55,424 INFO L125 PetriNetUnfolderBase]: For 212170/212181 co-relation queries the response was YES. [2024-06-27 23:00:55,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36774 conditions, 5500 events. 3199/5500 cut-off events. For 212170/212181 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37978 event pairs, 1205 based on Foata normal form. 9/5504 useless extension candidates. Maximal degree in co-relation 36684. Up to 4819 conditions per place. [2024-06-27 23:00:55,565 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 173 selfloop transitions, 100 changer transitions 0/280 dead transitions. [2024-06-27 23:00:55,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 280 transitions, 4125 flow [2024-06-27 23:00:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:00:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:00:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 23:00:55,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:00:55,567 INFO L175 Difference]: Start difference. First operand has 182 places, 234 transitions, 3035 flow. Second operand 10 states and 240 transitions. [2024-06-27 23:00:55,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 280 transitions, 4125 flow [2024-06-27 23:00:55,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 280 transitions, 4005 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 23:00:55,946 INFO L231 Difference]: Finished difference. Result has 188 places, 243 transitions, 3293 flow [2024-06-27 23:00:55,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3293, PETRI_PLACES=188, PETRI_TRANSITIONS=243} [2024-06-27 23:00:55,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-27 23:00:55,947 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 243 transitions, 3293 flow [2024-06-27 23:00:55,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:55,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:55,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:00:55,948 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:55,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 297897448, now seen corresponding path program 1 times [2024-06-27 23:00:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957260150] [2024-06-27 23:00:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957260150] [2024-06-27 23:00:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957260150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:56,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469036780] [2024-06-27 23:00:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:56,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:56,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 243 transitions, 3293 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:56,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:56,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:56,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:56,791 INFO L124 PetriNetUnfolderBase]: 3224/5527 cut-off events. [2024-06-27 23:00:56,791 INFO L125 PetriNetUnfolderBase]: For 229674/229685 co-relation queries the response was YES. [2024-06-27 23:00:56,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38432 conditions, 5527 events. 3224/5527 cut-off events. For 229674/229685 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 38178 event pairs, 1224 based on Foata normal form. 10/5532 useless extension candidates. Maximal degree in co-relation 38341. Up to 5023 conditions per place. [2024-06-27 23:00:56,850 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 227 selfloop transitions, 39 changer transitions 2/275 dead transitions. [2024-06-27 23:00:56,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 275 transitions, 4012 flow [2024-06-27 23:00:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 23:00:56,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 23:00:56,851 INFO L175 Difference]: Start difference. First operand has 188 places, 243 transitions, 3293 flow. Second operand 8 states and 182 transitions. [2024-06-27 23:00:56,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 275 transitions, 4012 flow [2024-06-27 23:00:57,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 275 transitions, 3829 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 23:00:57,286 INFO L231 Difference]: Finished difference. Result has 192 places, 252 transitions, 3325 flow [2024-06-27 23:00:57,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3325, PETRI_PLACES=192, PETRI_TRANSITIONS=252} [2024-06-27 23:00:57,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-27 23:00:57,287 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 252 transitions, 3325 flow [2024-06-27 23:00:57,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:57,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:57,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:00:57,287 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:57,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 302539078, now seen corresponding path program 2 times [2024-06-27 23:00:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716396113] [2024-06-27 23:00:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:57,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716396113] [2024-06-27 23:00:57,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716396113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:57,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:57,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310840165] [2024-06-27 23:00:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:57,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:57,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 252 transitions, 3325 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:57,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:57,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:57,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:58,166 INFO L124 PetriNetUnfolderBase]: 3252/5576 cut-off events. [2024-06-27 23:00:58,166 INFO L125 PetriNetUnfolderBase]: For 237247/237258 co-relation queries the response was YES. [2024-06-27 23:00:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39033 conditions, 5576 events. 3252/5576 cut-off events. For 237247/237258 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38638 event pairs, 1210 based on Foata normal form. 10/5581 useless extension candidates. Maximal degree in co-relation 38939. Up to 5027 conditions per place. [2024-06-27 23:00:58,226 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 225 selfloop transitions, 57 changer transitions 1/290 dead transitions. [2024-06-27 23:00:58,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 290 transitions, 4366 flow [2024-06-27 23:00:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:00:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:00:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:00:58,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 23:00:58,227 INFO L175 Difference]: Start difference. First operand has 192 places, 252 transitions, 3325 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:00:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 290 transitions, 4366 flow [2024-06-27 23:00:58,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 290 transitions, 4230 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:00:58,707 INFO L231 Difference]: Finished difference. Result has 196 places, 265 transitions, 3509 flow [2024-06-27 23:00:58,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3509, PETRI_PLACES=196, PETRI_TRANSITIONS=265} [2024-06-27 23:00:58,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 23:00:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 265 transitions, 3509 flow [2024-06-27 23:00:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:58,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:00:58,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:00:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:00:58,709 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:00:58,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:00:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash 475266118, now seen corresponding path program 3 times [2024-06-27 23:00:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:00:58,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109480618] [2024-06-27 23:00:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:00:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:00:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:00:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:00:58,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:00:58,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109480618] [2024-06-27 23:00:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109480618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:00:58,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:00:58,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:00:58,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824168832] [2024-06-27 23:00:58,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:00:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:00:58,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:00:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:00:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:00:58,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:00:58,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 265 transitions, 3509 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:00:58,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:00:58,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:00:58,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:00:59,596 INFO L124 PetriNetUnfolderBase]: 3253/5584 cut-off events. [2024-06-27 23:00:59,596 INFO L125 PetriNetUnfolderBase]: For 246994/247005 co-relation queries the response was YES. [2024-06-27 23:00:59,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39325 conditions, 5584 events. 3253/5584 cut-off events. For 246994/247005 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38641 event pairs, 1209 based on Foata normal form. 9/5588 useless extension candidates. Maximal degree in co-relation 39230. Up to 5031 conditions per place. [2024-06-27 23:00:59,658 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 221 selfloop transitions, 61 changer transitions 2/291 dead transitions. [2024-06-27 23:00:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 291 transitions, 4419 flow [2024-06-27 23:00:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:00:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:00:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 23:00:59,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 23:00:59,659 INFO L175 Difference]: Start difference. First operand has 196 places, 265 transitions, 3509 flow. Second operand 8 states and 182 transitions. [2024-06-27 23:00:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 291 transitions, 4419 flow [2024-06-27 23:01:00,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 291 transitions, 4326 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:00,212 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 3685 flow [2024-06-27 23:01:00,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3422, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-06-27 23:01:00,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-27 23:01:00,212 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 3685 flow [2024-06-27 23:01:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:00,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:00,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:00,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:01:00,213 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:00,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash 209239432, now seen corresponding path program 1 times [2024-06-27 23:01:00,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:00,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983072872] [2024-06-27 23:01:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:00,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:00,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:00,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983072872] [2024-06-27 23:01:00,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983072872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:00,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:00,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:00,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789638276] [2024-06-27 23:01:00,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:00,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:00,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:00,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:00,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:00,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 3685 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:00,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:00,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:00,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:01,239 INFO L124 PetriNetUnfolderBase]: 3266/5596 cut-off events. [2024-06-27 23:01:01,240 INFO L125 PetriNetUnfolderBase]: For 265672/265680 co-relation queries the response was YES. [2024-06-27 23:01:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39812 conditions, 5596 events. 3266/5596 cut-off events. For 265672/265680 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38589 event pairs, 1049 based on Foata normal form. 12/5605 useless extension candidates. Maximal degree in co-relation 39714. Up to 5093 conditions per place. [2024-06-27 23:01:01,293 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 271 selfloop transitions, 21 changer transitions 0/299 dead transitions. [2024-06-27 23:01:01,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 299 transitions, 4409 flow [2024-06-27 23:01:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 23:01:01,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:01:01,294 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 3685 flow. Second operand 7 states and 161 transitions. [2024-06-27 23:01:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 299 transitions, 4409 flow [2024-06-27 23:01:01,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 299 transitions, 4294 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:01,840 INFO L231 Difference]: Finished difference. Result has 208 places, 272 transitions, 3664 flow [2024-06-27 23:01:01,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3664, PETRI_PLACES=208, PETRI_TRANSITIONS=272} [2024-06-27 23:01:01,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-27 23:01:01,841 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 272 transitions, 3664 flow [2024-06-27 23:01:01,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:01,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:01,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:01,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:01:01,842 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:01,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash 474936712, now seen corresponding path program 2 times [2024-06-27 23:01:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:01,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157047462] [2024-06-27 23:01:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:01,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:01,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157047462] [2024-06-27 23:01:01,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157047462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:01,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:01,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132521006] [2024-06-27 23:01:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:01,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:01,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 272 transitions, 3664 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:01,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:01,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:01,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:02,764 INFO L124 PetriNetUnfolderBase]: 3286/5638 cut-off events. [2024-06-27 23:01:02,764 INFO L125 PetriNetUnfolderBase]: For 272505/272513 co-relation queries the response was YES. [2024-06-27 23:01:02,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40184 conditions, 5638 events. 3286/5638 cut-off events. For 272505/272513 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38961 event pairs, 1178 based on Foata normal form. 12/5647 useless extension candidates. Maximal degree in co-relation 40084. Up to 5116 conditions per place. [2024-06-27 23:01:02,832 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 273 selfloop transitions, 22 changer transitions 0/302 dead transitions. [2024-06-27 23:01:02,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 302 transitions, 4491 flow [2024-06-27 23:01:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 23:01:02,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 23:01:02,833 INFO L175 Difference]: Start difference. First operand has 208 places, 272 transitions, 3664 flow. Second operand 8 states and 179 transitions. [2024-06-27 23:01:02,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 302 transitions, 4491 flow [2024-06-27 23:01:03,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 302 transitions, 4427 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:03,319 INFO L231 Difference]: Finished difference. Result has 213 places, 274 transitions, 3676 flow [2024-06-27 23:01:03,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3676, PETRI_PLACES=213, PETRI_TRANSITIONS=274} [2024-06-27 23:01:03,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-27 23:01:03,320 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 274 transitions, 3676 flow [2024-06-27 23:01:03,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:03,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:03,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:01:03,320 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 475263142, now seen corresponding path program 3 times [2024-06-27 23:01:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:03,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607794854] [2024-06-27 23:01:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:03,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:03,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607794854] [2024-06-27 23:01:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607794854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:03,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:03,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939330221] [2024-06-27 23:01:03,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:03,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 274 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:03,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:03,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:04,246 INFO L124 PetriNetUnfolderBase]: 3268/5616 cut-off events. [2024-06-27 23:01:04,246 INFO L125 PetriNetUnfolderBase]: For 276778/276786 co-relation queries the response was YES. [2024-06-27 23:01:04,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39927 conditions, 5616 events. 3268/5616 cut-off events. For 276778/276786 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38846 event pairs, 1186 based on Foata normal form. 14/5627 useless extension candidates. Maximal degree in co-relation 39825. Up to 5138 conditions per place. [2024-06-27 23:01:04,311 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 271 selfloop transitions, 19 changer transitions 0/297 dead transitions. [2024-06-27 23:01:04,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 297 transitions, 4361 flow [2024-06-27 23:01:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 23:01:04,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-27 23:01:04,315 INFO L175 Difference]: Start difference. First operand has 213 places, 274 transitions, 3676 flow. Second operand 7 states and 158 transitions. [2024-06-27 23:01:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 297 transitions, 4361 flow [2024-06-27 23:01:04,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 297 transitions, 4253 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:04,853 INFO L231 Difference]: Finished difference. Result has 214 places, 274 transitions, 3611 flow [2024-06-27 23:01:04,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3611, PETRI_PLACES=214, PETRI_TRANSITIONS=274} [2024-06-27 23:01:04,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-27 23:01:04,853 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 274 transitions, 3611 flow [2024-06-27 23:01:04,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:04,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:04,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:04,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:01:04,854 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:04,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash -728071834, now seen corresponding path program 2 times [2024-06-27 23:01:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:04,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720790277] [2024-06-27 23:01:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:04,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:04,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:04,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720790277] [2024-06-27 23:01:04,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720790277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:04,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:04,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950626777] [2024-06-27 23:01:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:05,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:05,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 274 transitions, 3611 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:05,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:05,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:05,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:05,817 INFO L124 PetriNetUnfolderBase]: 3281/5637 cut-off events. [2024-06-27 23:01:05,817 INFO L125 PetriNetUnfolderBase]: For 285324/285335 co-relation queries the response was YES. [2024-06-27 23:01:05,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40187 conditions, 5637 events. 3281/5637 cut-off events. For 285324/285335 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39049 event pairs, 1147 based on Foata normal form. 9/5641 useless extension candidates. Maximal degree in co-relation 40084. Up to 4986 conditions per place. [2024-06-27 23:01:05,883 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 206 selfloop transitions, 102 changer transitions 0/315 dead transitions. [2024-06-27 23:01:05,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 315 transitions, 4887 flow [2024-06-27 23:01:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 23:01:05,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 23:01:05,885 INFO L175 Difference]: Start difference. First operand has 214 places, 274 transitions, 3611 flow. Second operand 9 states and 218 transitions. [2024-06-27 23:01:05,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 315 transitions, 4887 flow [2024-06-27 23:01:06,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 315 transitions, 4850 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:06,499 INFO L231 Difference]: Finished difference. Result has 218 places, 283 transitions, 4008 flow [2024-06-27 23:01:06,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4008, PETRI_PLACES=218, PETRI_TRANSITIONS=283} [2024-06-27 23:01:06,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-27 23:01:06,500 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 283 transitions, 4008 flow [2024-06-27 23:01:06,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:06,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:06,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:06,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:01:06,500 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:06,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 284001304, now seen corresponding path program 3 times [2024-06-27 23:01:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:06,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275826401] [2024-06-27 23:01:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:06,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275826401] [2024-06-27 23:01:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275826401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:06,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:06,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:06,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507822938] [2024-06-27 23:01:06,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:06,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:06,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:06,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:06,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 283 transitions, 4008 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:06,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:06,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:06,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:07,540 INFO L124 PetriNetUnfolderBase]: 3278/5632 cut-off events. [2024-06-27 23:01:07,540 INFO L125 PetriNetUnfolderBase]: For 295532/295543 co-relation queries the response was YES. [2024-06-27 23:01:07,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40632 conditions, 5632 events. 3278/5632 cut-off events. For 295532/295543 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39031 event pairs, 1160 based on Foata normal form. 9/5636 useless extension candidates. Maximal degree in co-relation 40527. Up to 4984 conditions per place. [2024-06-27 23:01:07,604 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 201 selfloop transitions, 106 changer transitions 0/313 dead transitions. [2024-06-27 23:01:07,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 313 transitions, 5062 flow [2024-06-27 23:01:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 23:01:07,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-27 23:01:07,605 INFO L175 Difference]: Start difference. First operand has 218 places, 283 transitions, 4008 flow. Second operand 11 states and 237 transitions. [2024-06-27 23:01:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 313 transitions, 5062 flow [2024-06-27 23:01:08,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 313 transitions, 4866 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:08,267 INFO L231 Difference]: Finished difference. Result has 226 places, 283 transitions, 4030 flow [2024-06-27 23:01:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4030, PETRI_PLACES=226, PETRI_TRANSITIONS=283} [2024-06-27 23:01:08,267 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-27 23:01:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 283 transitions, 4030 flow [2024-06-27 23:01:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:01:08,268 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:08,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash 278340394, now seen corresponding path program 4 times [2024-06-27 23:01:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:08,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114372910] [2024-06-27 23:01:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:08,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:08,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114372910] [2024-06-27 23:01:08,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114372910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:08,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:08,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880356290] [2024-06-27 23:01:08,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:08,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:08,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:08,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:08,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 283 transitions, 4030 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:08,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:08,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:08,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:09,280 INFO L124 PetriNetUnfolderBase]: 3275/5627 cut-off events. [2024-06-27 23:01:09,280 INFO L125 PetriNetUnfolderBase]: For 305301/305312 co-relation queries the response was YES. [2024-06-27 23:01:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40933 conditions, 5627 events. 3275/5627 cut-off events. For 305301/305312 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38987 event pairs, 1160 based on Foata normal form. 9/5631 useless extension candidates. Maximal degree in co-relation 40825. Up to 4982 conditions per place. [2024-06-27 23:01:09,343 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 94 changer transitions 0/309 dead transitions. [2024-06-27 23:01:09,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 309 transitions, 4982 flow [2024-06-27 23:01:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 23:01:09,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 23:01:09,344 INFO L175 Difference]: Start difference. First operand has 226 places, 283 transitions, 4030 flow. Second operand 7 states and 170 transitions. [2024-06-27 23:01:09,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 309 transitions, 4982 flow [2024-06-27 23:01:10,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 309 transitions, 4736 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:10,185 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3978 flow [2024-06-27 23:01:10,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3784, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3978, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-27 23:01:10,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 23:01:10,186 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3978 flow [2024-06-27 23:01:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:10,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:10,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:01:10,186 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:10,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash 284001676, now seen corresponding path program 1 times [2024-06-27 23:01:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390943844] [2024-06-27 23:01:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390943844] [2024-06-27 23:01:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390943844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:10,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346247297] [2024-06-27 23:01:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:10,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:10,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3978 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:10,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:10,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:10,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:11,199 INFO L124 PetriNetUnfolderBase]: 3272/5626 cut-off events. [2024-06-27 23:01:11,199 INFO L125 PetriNetUnfolderBase]: For 313671/313682 co-relation queries the response was YES. [2024-06-27 23:01:11,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41026 conditions, 5626 events. 3272/5626 cut-off events. For 313671/313682 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38983 event pairs, 1207 based on Foata normal form. 9/5630 useless extension candidates. Maximal degree in co-relation 40918. Up to 5104 conditions per place. [2024-06-27 23:01:11,262 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 48 changer transitions 0/297 dead transitions. [2024-06-27 23:01:11,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 297 transitions, 4594 flow [2024-06-27 23:01:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 23:01:11,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 23:01:11,263 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3978 flow. Second operand 8 states and 168 transitions. [2024-06-27 23:01:11,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 297 transitions, 4594 flow [2024-06-27 23:01:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 297 transitions, 4356 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:12,000 INFO L231 Difference]: Finished difference. Result has 226 places, 283 transitions, 3846 flow [2024-06-27 23:01:12,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3846, PETRI_PLACES=226, PETRI_TRANSITIONS=283} [2024-06-27 23:01:12,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-27 23:01:12,001 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 283 transitions, 3846 flow [2024-06-27 23:01:12,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:12,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:12,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:12,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:01:12,001 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:12,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:12,002 INFO L85 PathProgramCache]: Analyzing trace with hash 278460364, now seen corresponding path program 5 times [2024-06-27 23:01:12,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:12,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436801974] [2024-06-27 23:01:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:12,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436801974] [2024-06-27 23:01:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436801974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761189339] [2024-06-27 23:01:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:12,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 283 transitions, 3846 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:12,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:12,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:13,030 INFO L124 PetriNetUnfolderBase]: 3268/5606 cut-off events. [2024-06-27 23:01:13,030 INFO L125 PetriNetUnfolderBase]: For 326235/326246 co-relation queries the response was YES. [2024-06-27 23:01:13,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40914 conditions, 5606 events. 3268/5606 cut-off events. For 326235/326246 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38741 event pairs, 1155 based on Foata normal form. 10/5611 useless extension candidates. Maximal degree in co-relation 40804. Up to 5106 conditions per place. [2024-06-27 23:01:13,084 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 255 selfloop transitions, 40 changer transitions 0/301 dead transitions. [2024-06-27 23:01:13,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 301 transitions, 4578 flow [2024-06-27 23:01:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 23:01:13,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 23:01:13,085 INFO L175 Difference]: Start difference. First operand has 226 places, 283 transitions, 3846 flow. Second operand 7 states and 157 transitions. [2024-06-27 23:01:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 301 transitions, 4578 flow [2024-06-27 23:01:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 301 transitions, 4385 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:13,844 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3741 flow [2024-06-27 23:01:13,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3741, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-27 23:01:13,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 23:01:13,844 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3741 flow [2024-06-27 23:01:13,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:13,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:13,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:13,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:01:13,845 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:13,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash 278460550, now seen corresponding path program 4 times [2024-06-27 23:01:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721584791] [2024-06-27 23:01:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721584791] [2024-06-27 23:01:13,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721584791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:13,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:13,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:13,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49150236] [2024-06-27 23:01:13,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:13,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:13,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:14,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3741 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:14,923 INFO L124 PetriNetUnfolderBase]: 3260/5606 cut-off events. [2024-06-27 23:01:14,923 INFO L125 PetriNetUnfolderBase]: For 331435/331446 co-relation queries the response was YES. [2024-06-27 23:01:14,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40836 conditions, 5606 events. 3260/5606 cut-off events. For 331435/331446 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38831 event pairs, 1201 based on Foata normal form. 10/5611 useless extension candidates. Maximal degree in co-relation 40727. Up to 5098 conditions per place. [2024-06-27 23:01:14,986 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 254 selfloop transitions, 40 changer transitions 0/300 dead transitions. [2024-06-27 23:01:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 4371 flow [2024-06-27 23:01:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 23:01:14,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-27 23:01:14,987 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3741 flow. Second operand 7 states and 156 transitions. [2024-06-27 23:01:14,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 4371 flow [2024-06-27 23:01:15,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 300 transitions, 4234 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:15,908 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 3696 flow [2024-06-27 23:01:15,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3696, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-27 23:01:15,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 23:01:15,908 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 3696 flow [2024-06-27 23:01:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:15,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:15,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:15,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:01:15,909 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:15,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash 917805790, now seen corresponding path program 5 times [2024-06-27 23:01:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:15,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261558437] [2024-06-27 23:01:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:15,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261558437] [2024-06-27 23:01:16,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261558437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:16,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:16,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:16,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222957480] [2024-06-27 23:01:16,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:16,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:16,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:16,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 3696 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:16,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:16,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:16,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:16,866 INFO L124 PetriNetUnfolderBase]: 3298/5671 cut-off events. [2024-06-27 23:01:16,867 INFO L125 PetriNetUnfolderBase]: For 344337/344348 co-relation queries the response was YES. [2024-06-27 23:01:16,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41603 conditions, 5671 events. 3298/5671 cut-off events. For 344337/344348 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39353 event pairs, 1193 based on Foata normal form. 10/5676 useless extension candidates. Maximal degree in co-relation 41493. Up to 5091 conditions per place. [2024-06-27 23:01:16,929 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 231 selfloop transitions, 83 changer transitions 1/321 dead transitions. [2024-06-27 23:01:16,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 321 transitions, 4781 flow [2024-06-27 23:01:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 23:01:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 23:01:16,930 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 3696 flow. Second operand 10 states and 210 transitions. [2024-06-27 23:01:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 321 transitions, 4781 flow [2024-06-27 23:01:17,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 321 transitions, 4697 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:17,686 INFO L231 Difference]: Finished difference. Result has 231 places, 300 transitions, 4175 flow [2024-06-27 23:01:17,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4175, PETRI_PLACES=231, PETRI_TRANSITIONS=300} [2024-06-27 23:01:17,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-27 23:01:17,687 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 300 transitions, 4175 flow [2024-06-27 23:01:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:17,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:17,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:01:17,688 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 287714980, now seen corresponding path program 6 times [2024-06-27 23:01:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:17,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150334559] [2024-06-27 23:01:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:17,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150334559] [2024-06-27 23:01:17,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150334559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:17,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:01:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229004258] [2024-06-27 23:01:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:01:17,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:01:17,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:01:17,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:01:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 300 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:01:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:18,723 INFO L124 PetriNetUnfolderBase]: 3288/5657 cut-off events. [2024-06-27 23:01:18,723 INFO L125 PetriNetUnfolderBase]: For 341890/341901 co-relation queries the response was YES. [2024-06-27 23:01:18,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41683 conditions, 5657 events. 3288/5657 cut-off events. For 341890/341901 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39206 event pairs, 1193 based on Foata normal form. 10/5662 useless extension candidates. Maximal degree in co-relation 41569. Up to 5083 conditions per place. [2024-06-27 23:01:18,787 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 235 selfloop transitions, 77 changer transitions 2/320 dead transitions. [2024-06-27 23:01:18,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4851 flow [2024-06-27 23:01:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 23:01:18,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-27 23:01:18,788 INFO L175 Difference]: Start difference. First operand has 231 places, 300 transitions, 4175 flow. Second operand 10 states and 214 transitions. [2024-06-27 23:01:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4851 flow [2024-06-27 23:01:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 320 transitions, 4776 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:19,627 INFO L231 Difference]: Finished difference. Result has 235 places, 298 transitions, 4237 flow [2024-06-27 23:01:19,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4237, PETRI_PLACES=235, PETRI_TRANSITIONS=298} [2024-06-27 23:01:19,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-27 23:01:19,627 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 298 transitions, 4237 flow [2024-06-27 23:01:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 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) [2024-06-27 23:01:19,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:19,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:01:19,628 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1868406606, now seen corresponding path program 7 times [2024-06-27 23:01:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008242061] [2024-06-27 23:01:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008242061] [2024-06-27 23:01:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008242061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:19,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:19,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:19,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182277193] [2024-06-27 23:01:19,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:19,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:19,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 298 transitions, 4237 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:19,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:19,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:19,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:20,569 INFO L124 PetriNetUnfolderBase]: 3251/5587 cut-off events. [2024-06-27 23:01:20,569 INFO L125 PetriNetUnfolderBase]: For 339031/339042 co-relation queries the response was YES. [2024-06-27 23:01:20,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41330 conditions, 5587 events. 3251/5587 cut-off events. For 339031/339042 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38531 event pairs, 1179 based on Foata normal form. 9/5591 useless extension candidates. Maximal degree in co-relation 41217. Up to 5066 conditions per place. [2024-06-27 23:01:20,630 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 46 changer transitions 4/312 dead transitions. [2024-06-27 23:01:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 312 transitions, 4881 flow [2024-06-27 23:01:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 23:01:20,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 23:01:20,632 INFO L175 Difference]: Start difference. First operand has 235 places, 298 transitions, 4237 flow. Second operand 7 states and 160 transitions. [2024-06-27 23:01:20,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 312 transitions, 4881 flow [2024-06-27 23:01:21,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 312 transitions, 4751 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:21,373 INFO L231 Difference]: Finished difference. Result has 235 places, 294 transitions, 4136 flow [2024-06-27 23:01:21,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4136, PETRI_PLACES=235, PETRI_TRANSITIONS=294} [2024-06-27 23:01:21,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-27 23:01:21,373 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 294 transitions, 4136 flow [2024-06-27 23:01:21,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:21,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:21,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:21,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:01:21,374 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:21,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 8 times [2024-06-27 23:01:21,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:21,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801532157] [2024-06-27 23:01:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:21,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:21,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:21,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801532157] [2024-06-27 23:01:21,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801532157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:21,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:21,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:21,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622682943] [2024-06-27 23:01:21,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:21,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:21,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:21,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 294 transitions, 4136 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:21,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:21,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:22,255 INFO L124 PetriNetUnfolderBase]: 3173/5440 cut-off events. [2024-06-27 23:01:22,255 INFO L125 PetriNetUnfolderBase]: For 353250/353255 co-relation queries the response was YES. [2024-06-27 23:01:22,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40820 conditions, 5440 events. 3173/5440 cut-off events. For 353250/353255 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37246 event pairs, 1151 based on Foata normal form. 3/5436 useless extension candidates. Maximal degree in co-relation 40707. Up to 4771 conditions per place. [2024-06-27 23:01:22,318 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 185 selfloop transitions, 119 changer transitions 1/312 dead transitions. [2024-06-27 23:01:22,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 312 transitions, 4931 flow [2024-06-27 23:01:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 23:01:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 23:01:22,326 INFO L175 Difference]: Start difference. First operand has 235 places, 294 transitions, 4136 flow. Second operand 7 states and 164 transitions. [2024-06-27 23:01:22,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 312 transitions, 4931 flow [2024-06-27 23:01:23,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 312 transitions, 4609 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:23,124 INFO L231 Difference]: Finished difference. Result has 232 places, 296 transitions, 4087 flow [2024-06-27 23:01:23,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4087, PETRI_PLACES=232, PETRI_TRANSITIONS=296} [2024-06-27 23:01:23,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-27 23:01:23,125 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 296 transitions, 4087 flow [2024-06-27 23:01:23,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:23,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:23,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:01:23,126 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:23,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash 694993670, now seen corresponding path program 9 times [2024-06-27 23:01:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:23,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686538457] [2024-06-27 23:01:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:23,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686538457] [2024-06-27 23:01:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686538457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:23,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:23,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:23,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859586052] [2024-06-27 23:01:23,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:23,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:23,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:23,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:23,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 296 transitions, 4087 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:23,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:23,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:23,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:24,019 INFO L124 PetriNetUnfolderBase]: 3176/5450 cut-off events. [2024-06-27 23:01:24,019 INFO L125 PetriNetUnfolderBase]: For 364766/364777 co-relation queries the response was YES. [2024-06-27 23:01:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40968 conditions, 5450 events. 3176/5450 cut-off events. For 364766/364777 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 37327 event pairs, 1129 based on Foata normal form. 9/5454 useless extension candidates. Maximal degree in co-relation 40857. Up to 4775 conditions per place. [2024-06-27 23:01:24,079 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 124 changer transitions 1/324 dead transitions. [2024-06-27 23:01:24,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 324 transitions, 4940 flow [2024-06-27 23:01:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:01:24,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 23:01:24,080 INFO L175 Difference]: Start difference. First operand has 232 places, 296 transitions, 4087 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:01:24,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 324 transitions, 4940 flow [2024-06-27 23:01:24,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 324 transitions, 4748 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:24,952 INFO L231 Difference]: Finished difference. Result has 236 places, 298 transitions, 4186 flow [2024-06-27 23:01:24,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4186, PETRI_PLACES=236, PETRI_TRANSITIONS=298} [2024-06-27 23:01:24,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-27 23:01:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 298 transitions, 4186 flow [2024-06-27 23:01:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:24,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:24,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:01:24,952 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:24,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash 694756520, now seen corresponding path program 10 times [2024-06-27 23:01:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724778984] [2024-06-27 23:01:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:25,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724778984] [2024-06-27 23:01:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724778984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:25,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:25,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889168689] [2024-06-27 23:01:25,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:25,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:25,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 298 transitions, 4186 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:25,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:25,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:25,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:25,847 INFO L124 PetriNetUnfolderBase]: 3141/5397 cut-off events. [2024-06-27 23:01:25,848 INFO L125 PetriNetUnfolderBase]: For 370828/370839 co-relation queries the response was YES. [2024-06-27 23:01:25,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40764 conditions, 5397 events. 3141/5397 cut-off events. For 370828/370839 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 36863 event pairs, 1125 based on Foata normal form. 10/5402 useless extension candidates. Maximal degree in co-relation 40652. Up to 4716 conditions per place. [2024-06-27 23:01:25,909 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 122 changer transitions 2/329 dead transitions. [2024-06-27 23:01:25,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 329 transitions, 4908 flow [2024-06-27 23:01:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 23:01:25,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 23:01:25,913 INFO L175 Difference]: Start difference. First operand has 236 places, 298 transitions, 4186 flow. Second operand 9 states and 219 transitions. [2024-06-27 23:01:25,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 329 transitions, 4908 flow [2024-06-27 23:01:26,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 329 transitions, 4630 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:26,852 INFO L231 Difference]: Finished difference. Result has 239 places, 296 transitions, 4142 flow [2024-06-27 23:01:26,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4142, PETRI_PLACES=239, PETRI_TRANSITIONS=296} [2024-06-27 23:01:26,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-27 23:01:26,853 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 296 transitions, 4142 flow [2024-06-27 23:01:26,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:26,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:26,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:01:26,853 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:26,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 705715454, now seen corresponding path program 4 times [2024-06-27 23:01:26,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:26,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079919794] [2024-06-27 23:01:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079919794] [2024-06-27 23:01:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079919794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:26,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777347748] [2024-06-27 23:01:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:27,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:27,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 296 transitions, 4142 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:27,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:27,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:27,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:27,778 INFO L124 PetriNetUnfolderBase]: 3086/5293 cut-off events. [2024-06-27 23:01:27,779 INFO L125 PetriNetUnfolderBase]: For 390429/390431 co-relation queries the response was YES. [2024-06-27 23:01:27,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40500 conditions, 5293 events. 3086/5293 cut-off events. For 390429/390431 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35916 event pairs, 1085 based on Foata normal form. 8/5296 useless extension candidates. Maximal degree in co-relation 40387. Up to 4808 conditions per place. [2024-06-27 23:01:27,842 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 279 selfloop transitions, 27 changer transitions 0/313 dead transitions. [2024-06-27 23:01:27,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 313 transitions, 4848 flow [2024-06-27 23:01:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 23:01:27,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 23:01:27,843 INFO L175 Difference]: Start difference. First operand has 239 places, 296 transitions, 4142 flow. Second operand 6 states and 136 transitions. [2024-06-27 23:01:27,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 313 transitions, 4848 flow [2024-06-27 23:01:28,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 313 transitions, 4551 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 23:01:28,917 INFO L231 Difference]: Finished difference. Result has 235 places, 297 transitions, 3915 flow [2024-06-27 23:01:28,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3915, PETRI_PLACES=235, PETRI_TRANSITIONS=297} [2024-06-27 23:01:28,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-27 23:01:28,917 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 297 transitions, 3915 flow [2024-06-27 23:01:28,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:28,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:28,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:28,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:01:28,917 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:28,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:28,918 INFO L85 PathProgramCache]: Analyzing trace with hash 694990694, now seen corresponding path program 5 times [2024-06-27 23:01:28,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:28,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553686097] [2024-06-27 23:01:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553686097] [2024-06-27 23:01:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553686097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:29,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:29,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221077246] [2024-06-27 23:01:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:29,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:29,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 297 transitions, 3915 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:29,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:29,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:29,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:29,833 INFO L124 PetriNetUnfolderBase]: 3101/5317 cut-off events. [2024-06-27 23:01:29,833 INFO L125 PetriNetUnfolderBase]: For 366469/366477 co-relation queries the response was YES. [2024-06-27 23:01:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39788 conditions, 5317 events. 3101/5317 cut-off events. For 366469/366477 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 36112 event pairs, 1055 based on Foata normal form. 14/5328 useless extension candidates. Maximal degree in co-relation 39675. Up to 4801 conditions per place. [2024-06-27 23:01:29,893 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 285 selfloop transitions, 30 changer transitions 0/322 dead transitions. [2024-06-27 23:01:29,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 4661 flow [2024-06-27 23:01:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 23:01:29,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-27 23:01:29,894 INFO L175 Difference]: Start difference. First operand has 235 places, 297 transitions, 3915 flow. Second operand 8 states and 177 transitions. [2024-06-27 23:01:29,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 4661 flow [2024-06-27 23:01:30,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 322 transitions, 4608 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:30,809 INFO L231 Difference]: Finished difference. Result has 239 places, 298 transitions, 3943 flow [2024-06-27 23:01:30,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3943, PETRI_PLACES=239, PETRI_TRANSITIONS=298} [2024-06-27 23:01:30,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-27 23:01:30,810 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 298 transitions, 3943 flow [2024-06-27 23:01:30,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:30,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:30,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:30,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:01:30,810 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:30,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash 694664264, now seen corresponding path program 6 times [2024-06-27 23:01:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:30,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146902330] [2024-06-27 23:01:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:30,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146902330] [2024-06-27 23:01:30,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146902330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:30,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:30,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521565328] [2024-06-27 23:01:30,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:30,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:30,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:30,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:30,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:30,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 298 transitions, 3943 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:30,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:30,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:30,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:31,755 INFO L124 PetriNetUnfolderBase]: 3088/5298 cut-off events. [2024-06-27 23:01:31,755 INFO L125 PetriNetUnfolderBase]: For 367146/367154 co-relation queries the response was YES. [2024-06-27 23:01:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39666 conditions, 5298 events. 3088/5298 cut-off events. For 367146/367154 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 35919 event pairs, 902 based on Foata normal form. 12/5307 useless extension candidates. Maximal degree in co-relation 39552. Up to 4660 conditions per place. [2024-06-27 23:01:31,811 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 38 changer transitions 0/328 dead transitions. [2024-06-27 23:01:31,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 328 transitions, 4720 flow [2024-06-27 23:01:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 23:01:31,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 23:01:31,812 INFO L175 Difference]: Start difference. First operand has 239 places, 298 transitions, 3943 flow. Second operand 8 states and 183 transitions. [2024-06-27 23:01:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 328 transitions, 4720 flow [2024-06-27 23:01:32,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 328 transitions, 4657 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:32,582 INFO L231 Difference]: Finished difference. Result has 240 places, 298 transitions, 3962 flow [2024-06-27 23:01:32,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3962, PETRI_PLACES=240, PETRI_TRANSITIONS=298} [2024-06-27 23:01:32,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-27 23:01:32,582 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 298 transitions, 3962 flow [2024-06-27 23:01:32,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:32,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:32,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:32,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:01:32,583 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:32,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash 706115168, now seen corresponding path program 1 times [2024-06-27 23:01:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:32,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790961716] [2024-06-27 23:01:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:32,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:32,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790961716] [2024-06-27 23:01:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790961716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:32,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:32,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:32,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576081255] [2024-06-27 23:01:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:32,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:32,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:32,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 298 transitions, 3962 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:32,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:32,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:33,521 INFO L124 PetriNetUnfolderBase]: 3116/5335 cut-off events. [2024-06-27 23:01:33,521 INFO L125 PetriNetUnfolderBase]: For 368134/368136 co-relation queries the response was YES. [2024-06-27 23:01:33,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39945 conditions, 5335 events. 3116/5335 cut-off events. For 368134/368136 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 36156 event pairs, 1023 based on Foata normal form. 6/5336 useless extension candidates. Maximal degree in co-relation 39831. Up to 4758 conditions per place. [2024-06-27 23:01:33,584 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 282 selfloop transitions, 32 changer transitions 0/321 dead transitions. [2024-06-27 23:01:33,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 321 transitions, 4749 flow [2024-06-27 23:01:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:01:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:01:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 23:01:33,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-27 23:01:33,585 INFO L175 Difference]: Start difference. First operand has 240 places, 298 transitions, 3962 flow. Second operand 6 states and 139 transitions. [2024-06-27 23:01:33,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 321 transitions, 4749 flow [2024-06-27 23:01:34,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 321 transitions, 4667 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:34,389 INFO L231 Difference]: Finished difference. Result has 240 places, 302 transitions, 4024 flow [2024-06-27 23:01:34,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4024, PETRI_PLACES=240, PETRI_TRANSITIONS=302} [2024-06-27 23:01:34,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-27 23:01:34,390 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 302 transitions, 4024 flow [2024-06-27 23:01:34,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:34,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:34,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:34,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:01:34,390 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:34,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1307467638, now seen corresponding path program 6 times [2024-06-27 23:01:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560912866] [2024-06-27 23:01:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560912866] [2024-06-27 23:01:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560912866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:34,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896017441] [2024-06-27 23:01:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:34,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:34,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:34,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:34,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:34,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 302 transitions, 4024 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:34,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:34,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:34,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:35,325 INFO L124 PetriNetUnfolderBase]: 3153/5398 cut-off events. [2024-06-27 23:01:35,325 INFO L125 PetriNetUnfolderBase]: For 369104/369115 co-relation queries the response was YES. [2024-06-27 23:01:35,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40739 conditions, 5398 events. 3153/5398 cut-off events. For 369104/369115 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 36763 event pairs, 1093 based on Foata normal form. 9/5400 useless extension candidates. Maximal degree in co-relation 40624. Up to 4657 conditions per place. [2024-06-27 23:01:35,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 192 selfloop transitions, 153 changer transitions 0/352 dead transitions. [2024-06-27 23:01:35,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 352 transitions, 5654 flow [2024-06-27 23:01:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 23:01:35,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-27 23:01:35,389 INFO L175 Difference]: Start difference. First operand has 240 places, 302 transitions, 4024 flow. Second operand 9 states and 224 transitions. [2024-06-27 23:01:35,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 352 transitions, 5654 flow [2024-06-27 23:01:36,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 352 transitions, 5588 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 23:01:36,524 INFO L231 Difference]: Finished difference. Result has 248 places, 316 transitions, 4656 flow [2024-06-27 23:01:36,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4656, PETRI_PLACES=248, PETRI_TRANSITIONS=316} [2024-06-27 23:01:36,524 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-27 23:01:36,524 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 316 transitions, 4656 flow [2024-06-27 23:01:36,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:36,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:36,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:01:36,525 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:36,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:36,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1143367704, now seen corresponding path program 7 times [2024-06-27 23:01:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:36,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643975367] [2024-06-27 23:01:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:36,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:36,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643975367] [2024-06-27 23:01:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643975367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:36,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:36,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:36,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181343087] [2024-06-27 23:01:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:36,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:36,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:36,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:36,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 316 transitions, 4656 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:36,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:36,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:36,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:37,657 INFO L124 PetriNetUnfolderBase]: 3163/5426 cut-off events. [2024-06-27 23:01:37,658 INFO L125 PetriNetUnfolderBase]: For 388838/388849 co-relation queries the response was YES. [2024-06-27 23:01:37,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42537 conditions, 5426 events. 3163/5426 cut-off events. For 388838/388849 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 37074 event pairs, 1101 based on Foata normal form. 9/5428 useless extension candidates. Maximal degree in co-relation 42419. Up to 4663 conditions per place. [2024-06-27 23:01:37,712 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 193 selfloop transitions, 160 changer transitions 0/360 dead transitions. [2024-06-27 23:01:37,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 6126 flow [2024-06-27 23:01:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:01:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:01:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-27 23:01:37,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 23:01:37,713 INFO L175 Difference]: Start difference. First operand has 248 places, 316 transitions, 4656 flow. Second operand 11 states and 260 transitions. [2024-06-27 23:01:37,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 6126 flow [2024-06-27 23:01:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 360 transitions, 5764 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:38,692 INFO L231 Difference]: Finished difference. Result has 256 places, 322 transitions, 4742 flow [2024-06-27 23:01:38,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4742, PETRI_PLACES=256, PETRI_TRANSITIONS=322} [2024-06-27 23:01:38,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-27 23:01:38,693 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 322 transitions, 4742 flow [2024-06-27 23:01:38,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:38,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:38,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:38,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:01:38,694 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:38,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1153544694, now seen corresponding path program 8 times [2024-06-27 23:01:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638458768] [2024-06-27 23:01:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638458768] [2024-06-27 23:01:38,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638458768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:38,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:38,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:38,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880814635] [2024-06-27 23:01:38,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:38,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:38,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:38,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:38,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 322 transitions, 4742 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:38,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:38,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:38,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:39,682 INFO L124 PetriNetUnfolderBase]: 3168/5434 cut-off events. [2024-06-27 23:01:39,682 INFO L125 PetriNetUnfolderBase]: For 394384/394395 co-relation queries the response was YES. [2024-06-27 23:01:39,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42440 conditions, 5434 events. 3168/5434 cut-off events. For 394384/394395 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 37114 event pairs, 1109 based on Foata normal form. 9/5436 useless extension candidates. Maximal degree in co-relation 42321. Up to 4667 conditions per place. [2024-06-27 23:01:39,747 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 164 changer transitions 0/355 dead transitions. [2024-06-27 23:01:39,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 355 transitions, 6023 flow [2024-06-27 23:01:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:01:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:01:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 23:01:39,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 23:01:39,749 INFO L175 Difference]: Start difference. First operand has 256 places, 322 transitions, 4742 flow. Second operand 10 states and 232 transitions. [2024-06-27 23:01:39,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 355 transitions, 6023 flow [2024-06-27 23:01:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 355 transitions, 5653 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 23:01:40,861 INFO L231 Difference]: Finished difference. Result has 258 places, 325 transitions, 4771 flow [2024-06-27 23:01:40,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4771, PETRI_PLACES=258, PETRI_TRANSITIONS=325} [2024-06-27 23:01:40,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 23:01:40,862 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 325 transitions, 4771 flow [2024-06-27 23:01:40,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:40,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:40,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:40,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:01:40,863 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:40,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:40,863 INFO L85 PathProgramCache]: Analyzing trace with hash 692845004, now seen corresponding path program 2 times [2024-06-27 23:01:40,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:40,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891915421] [2024-06-27 23:01:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:40,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:40,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891915421] [2024-06-27 23:01:40,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891915421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:40,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:40,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:40,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68568841] [2024-06-27 23:01:40,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:40,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:40,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:40,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:41,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:41,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 325 transitions, 4771 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:41,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:41,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:41,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:41,847 INFO L124 PetriNetUnfolderBase]: 3165/5432 cut-off events. [2024-06-27 23:01:41,847 INFO L125 PetriNetUnfolderBase]: For 404690/404701 co-relation queries the response was YES. [2024-06-27 23:01:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42533 conditions, 5432 events. 3165/5432 cut-off events. For 404690/404701 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 37044 event pairs, 1094 based on Foata normal form. 9/5436 useless extension candidates. Maximal degree in co-relation 42413. Up to 4868 conditions per place. [2024-06-27 23:01:41,911 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-27 23:01:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 343 transitions, 5601 flow [2024-06-27 23:01:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 23:01:41,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 23:01:41,912 INFO L175 Difference]: Start difference. First operand has 258 places, 325 transitions, 4771 flow. Second operand 7 states and 165 transitions. [2024-06-27 23:01:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 343 transitions, 5601 flow [2024-06-27 23:01:43,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 343 transitions, 5241 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 23:01:43,109 INFO L231 Difference]: Finished difference. Result has 258 places, 325 transitions, 4535 flow [2024-06-27 23:01:43,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4535, PETRI_PLACES=258, PETRI_TRANSITIONS=325} [2024-06-27 23:01:43,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 23:01:43,109 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 325 transitions, 4535 flow [2024-06-27 23:01:43,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:43,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:43,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:43,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:01:43,116 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:43,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash 692844632, now seen corresponding path program 9 times [2024-06-27 23:01:43,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:43,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505146853] [2024-06-27 23:01:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:43,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505146853] [2024-06-27 23:01:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505146853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:43,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930548246] [2024-06-27 23:01:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:43,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:43,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 325 transitions, 4535 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:43,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:43,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:43,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:44,230 INFO L124 PetriNetUnfolderBase]: 3209/5499 cut-off events. [2024-06-27 23:01:44,230 INFO L125 PetriNetUnfolderBase]: For 427427/427438 co-relation queries the response was YES. [2024-06-27 23:01:44,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43068 conditions, 5499 events. 3209/5499 cut-off events. For 427427/427438 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37528 event pairs, 1085 based on Foata normal form. 10/5504 useless extension candidates. Maximal degree in co-relation 42947. Up to 4811 conditions per place. [2024-06-27 23:01:44,289 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 114 changer transitions 0/373 dead transitions. [2024-06-27 23:01:44,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 373 transitions, 5833 flow [2024-06-27 23:01:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 23:01:44,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-27 23:01:44,290 INFO L175 Difference]: Start difference. First operand has 258 places, 325 transitions, 4535 flow. Second operand 8 states and 199 transitions. [2024-06-27 23:01:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 373 transitions, 5833 flow [2024-06-27 23:01:45,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 373 transitions, 5655 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 23:01:45,337 INFO L231 Difference]: Finished difference. Result has 263 places, 342 transitions, 4973 flow [2024-06-27 23:01:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=263, PETRI_TRANSITIONS=342} [2024-06-27 23:01:45,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-27 23:01:45,338 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 342 transitions, 4973 flow [2024-06-27 23:01:45,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:45,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:45,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:45,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:01:45,339 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:45,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 698385944, now seen corresponding path program 3 times [2024-06-27 23:01:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:45,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272274512] [2024-06-27 23:01:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:45,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272274512] [2024-06-27 23:01:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272274512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915494277] [2024-06-27 23:01:45,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:45,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:45,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 342 transitions, 4973 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:45,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:45,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:45,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:46,324 INFO L124 PetriNetUnfolderBase]: 3203/5483 cut-off events. [2024-06-27 23:01:46,324 INFO L125 PetriNetUnfolderBase]: For 438733/438744 co-relation queries the response was YES. [2024-06-27 23:01:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43548 conditions, 5483 events. 3203/5483 cut-off events. For 438733/438744 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37414 event pairs, 1081 based on Foata normal form. 10/5488 useless extension candidates. Maximal degree in co-relation 43423. Up to 4917 conditions per place. [2024-06-27 23:01:46,392 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 66 changer transitions 0/356 dead transitions. [2024-06-27 23:01:46,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 356 transitions, 5705 flow [2024-06-27 23:01:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 23:01:46,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:01:46,393 INFO L175 Difference]: Start difference. First operand has 263 places, 342 transitions, 4973 flow. Second operand 7 states and 161 transitions. [2024-06-27 23:01:46,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 356 transitions, 5705 flow [2024-06-27 23:01:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 356 transitions, 5524 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:47,635 INFO L231 Difference]: Finished difference. Result has 267 places, 342 transitions, 4933 flow [2024-06-27 23:01:47,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4933, PETRI_PLACES=267, PETRI_TRANSITIONS=342} [2024-06-27 23:01:47,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-27 23:01:47,636 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 342 transitions, 4933 flow [2024-06-27 23:01:47,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:47,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:47,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:47,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:01:47,636 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:47,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 698385758, now seen corresponding path program 11 times [2024-06-27 23:01:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:47,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416380049] [2024-06-27 23:01:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:47,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:47,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:47,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416380049] [2024-06-27 23:01:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416380049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:47,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:47,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274498040] [2024-06-27 23:01:47,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:47,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:47,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:47,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 342 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:47,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:48,661 INFO L124 PetriNetUnfolderBase]: 3205/5496 cut-off events. [2024-06-27 23:01:48,661 INFO L125 PetriNetUnfolderBase]: For 445309/445320 co-relation queries the response was YES. [2024-06-27 23:01:48,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43599 conditions, 5496 events. 3205/5496 cut-off events. For 445309/445320 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37532 event pairs, 1092 based on Foata normal form. 10/5501 useless extension candidates. Maximal degree in co-relation 43473. Up to 4809 conditions per place. [2024-06-27 23:01:48,727 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 117 changer transitions 0/370 dead transitions. [2024-06-27 23:01:48,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 370 transitions, 6028 flow [2024-06-27 23:01:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:01:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 23:01:48,728 INFO L175 Difference]: Start difference. First operand has 267 places, 342 transitions, 4933 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:01:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 370 transitions, 6028 flow [2024-06-27 23:01:49,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 370 transitions, 5846 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:49,849 INFO L231 Difference]: Finished difference. Result has 271 places, 346 transitions, 5072 flow [2024-06-27 23:01:49,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5072, PETRI_PLACES=271, PETRI_TRANSITIONS=346} [2024-06-27 23:01:49,850 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-27 23:01:49,850 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 346 transitions, 5072 flow [2024-06-27 23:01:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:49,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:49,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:49,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:01:49,850 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:49,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1311303010, now seen corresponding path program 12 times [2024-06-27 23:01:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254408705] [2024-06-27 23:01:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:49,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:49,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254408705] [2024-06-27 23:01:49,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254408705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:49,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:49,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720392494] [2024-06-27 23:01:49,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:49,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:50,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:50,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 346 transitions, 5072 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:50,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:50,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:50,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:50,960 INFO L124 PetriNetUnfolderBase]: 3215/5500 cut-off events. [2024-06-27 23:01:50,960 INFO L125 PetriNetUnfolderBase]: For 462312/462323 co-relation queries the response was YES. [2024-06-27 23:01:51,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44072 conditions, 5500 events. 3215/5500 cut-off events. For 462312/462323 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37486 event pairs, 1075 based on Foata normal form. 9/5504 useless extension candidates. Maximal degree in co-relation 43944. Up to 4921 conditions per place. [2024-06-27 23:01:51,022 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 78 changer transitions 0/371 dead transitions. [2024-06-27 23:01:51,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 371 transitions, 6084 flow [2024-06-27 23:01:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:01:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:01:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 23:01:51,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 23:01:51,023 INFO L175 Difference]: Start difference. First operand has 271 places, 346 transitions, 5072 flow. Second operand 9 states and 197 transitions. [2024-06-27 23:01:51,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 371 transitions, 6084 flow [2024-06-27 23:01:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 371 transitions, 5786 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 23:01:52,099 INFO L231 Difference]: Finished difference. Result has 275 places, 354 transitions, 5062 flow [2024-06-27 23:01:52,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5062, PETRI_PLACES=275, PETRI_TRANSITIONS=354} [2024-06-27 23:01:52,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-27 23:01:52,099 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 354 transitions, 5062 flow [2024-06-27 23:01:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:52,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:52,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:01:52,100 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:52,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1316064610, now seen corresponding path program 13 times [2024-06-27 23:01:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:52,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141554712] [2024-06-27 23:01:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:52,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:52,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:52,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141554712] [2024-06-27 23:01:52,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141554712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:52,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:52,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588576922] [2024-06-27 23:01:52,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:52,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:52,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:52,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:52,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 354 transitions, 5062 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:52,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:52,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:52,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:53,097 INFO L124 PetriNetUnfolderBase]: 3212/5509 cut-off events. [2024-06-27 23:01:53,097 INFO L125 PetriNetUnfolderBase]: For 462081/462086 co-relation queries the response was YES. [2024-06-27 23:01:53,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43121 conditions, 5509 events. 3212/5509 cut-off events. For 462081/462086 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37699 event pairs, 1114 based on Foata normal form. 3/5505 useless extension candidates. Maximal degree in co-relation 42992. Up to 4703 conditions per place. [2024-06-27 23:01:53,173 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 196 selfloop transitions, 175 changer transitions 0/378 dead transitions. [2024-06-27 23:01:53,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 378 transitions, 6326 flow [2024-06-27 23:01:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 23:01:53,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 23:01:53,174 INFO L175 Difference]: Start difference. First operand has 275 places, 354 transitions, 5062 flow. Second operand 8 states and 187 transitions. [2024-06-27 23:01:53,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 378 transitions, 6326 flow [2024-06-27 23:01:54,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 378 transitions, 6174 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 23:01:54,536 INFO L231 Difference]: Finished difference. Result has 280 places, 360 transitions, 5469 flow [2024-06-27 23:01:54,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5469, PETRI_PLACES=280, PETRI_TRANSITIONS=360} [2024-06-27 23:01:54,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 23:01:54,536 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 360 transitions, 5469 flow [2024-06-27 23:01:54,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:54,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:54,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:54,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:01:54,537 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:54,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944640, now seen corresponding path program 14 times [2024-06-27 23:01:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:54,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222618278] [2024-06-27 23:01:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:54,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:54,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222618278] [2024-06-27 23:01:54,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222618278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:54,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:54,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634423000] [2024-06-27 23:01:54,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:54,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:54,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:54,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:54,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 360 transitions, 5469 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:54,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:54,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:54,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:55,565 INFO L124 PetriNetUnfolderBase]: 3209/5516 cut-off events. [2024-06-27 23:01:55,565 INFO L125 PetriNetUnfolderBase]: For 480398/480409 co-relation queries the response was YES. [2024-06-27 23:01:55,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44743 conditions, 5516 events. 3209/5516 cut-off events. For 480398/480409 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37780 event pairs, 1096 based on Foata normal form. 9/5520 useless extension candidates. Maximal degree in co-relation 44612. Up to 4920 conditions per place. [2024-06-27 23:01:55,639 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 74 changer transitions 0/375 dead transitions. [2024-06-27 23:01:55,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 375 transitions, 6241 flow [2024-06-27 23:01:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:01:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:01:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 23:01:55,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 23:01:55,640 INFO L175 Difference]: Start difference. First operand has 280 places, 360 transitions, 5469 flow. Second operand 8 states and 179 transitions. [2024-06-27 23:01:55,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 375 transitions, 6241 flow [2024-06-27 23:01:56,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 375 transitions, 6051 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 23:01:56,919 INFO L231 Difference]: Finished difference. Result has 285 places, 360 transitions, 5433 flow [2024-06-27 23:01:56,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5433, PETRI_PLACES=285, PETRI_TRANSITIONS=360} [2024-06-27 23:01:56,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 23:01:56,920 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 360 transitions, 5433 flow [2024-06-27 23:01:56,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:56,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:56,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:56,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:01:56,920 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:56,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1316067586, now seen corresponding path program 7 times [2024-06-27 23:01:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:56,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812905032] [2024-06-27 23:01:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812905032] [2024-06-27 23:01:57,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812905032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:57,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:57,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:57,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141279126] [2024-06-27 23:01:57,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:57,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:57,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:57,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:57,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:57,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 360 transitions, 5433 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:57,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:57,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:01:57,942 INFO L124 PetriNetUnfolderBase]: 3224/5526 cut-off events. [2024-06-27 23:01:57,942 INFO L125 PetriNetUnfolderBase]: For 509319/509321 co-relation queries the response was YES. [2024-06-27 23:01:57,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45035 conditions, 5526 events. 3224/5526 cut-off events. For 509319/509321 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 37755 event pairs, 1079 based on Foata normal form. 8/5529 useless extension candidates. Maximal degree in co-relation 44902. Up to 5007 conditions per place. [2024-06-27 23:01:58,010 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 339 selfloop transitions, 32 changer transitions 0/378 dead transitions. [2024-06-27 23:01:58,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 378 transitions, 6276 flow [2024-06-27 23:01:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:01:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:01:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 23:01:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 23:01:58,011 INFO L175 Difference]: Start difference. First operand has 285 places, 360 transitions, 5433 flow. Second operand 7 states and 154 transitions. [2024-06-27 23:01:58,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 378 transitions, 6276 flow [2024-06-27 23:01:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 378 transitions, 6087 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 23:01:59,344 INFO L231 Difference]: Finished difference. Result has 283 places, 361 transitions, 5331 flow [2024-06-27 23:01:59,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5331, PETRI_PLACES=283, PETRI_TRANSITIONS=361} [2024-06-27 23:01:59,345 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 23:01:59,345 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 361 transitions, 5331 flow [2024-06-27 23:01:59,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:59,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:01:59,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:01:59,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:01:59,345 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:01:59,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:01:59,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1315667872, now seen corresponding path program 2 times [2024-06-27 23:01:59,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:01:59,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948956439] [2024-06-27 23:01:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:01:59,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:01:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:01:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:01:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:01:59,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948956439] [2024-06-27 23:01:59,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948956439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:01:59,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:01:59,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:01:59,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933890702] [2024-06-27 23:01:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:01:59,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:01:59,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:01:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:01:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:01:59,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:01:59,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 361 transitions, 5331 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:01:59,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:01:59,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:01:59,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:00,440 INFO L124 PetriNetUnfolderBase]: 3252/5574 cut-off events. [2024-06-27 23:02:00,440 INFO L125 PetriNetUnfolderBase]: For 519847/519849 co-relation queries the response was YES. [2024-06-27 23:02:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45445 conditions, 5574 events. 3252/5574 cut-off events. For 519847/519849 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38122 event pairs, 1081 based on Foata normal form. 6/5575 useless extension candidates. Maximal degree in co-relation 45311. Up to 5021 conditions per place. [2024-06-27 23:02:00,516 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 343 selfloop transitions, 34 changer transitions 0/384 dead transitions. [2024-06-27 23:02:00,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 384 transitions, 6242 flow [2024-06-27 23:02:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 23:02:00,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 23:02:00,517 INFO L175 Difference]: Start difference. First operand has 283 places, 361 transitions, 5331 flow. Second operand 7 states and 157 transitions. [2024-06-27 23:02:00,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 384 transitions, 6242 flow [2024-06-27 23:02:01,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 384 transitions, 6167 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:01,973 INFO L231 Difference]: Finished difference. Result has 286 places, 364 transitions, 5390 flow [2024-06-27 23:02:01,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5390, PETRI_PLACES=286, PETRI_TRANSITIONS=364} [2024-06-27 23:02:01,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-27 23:02:01,973 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 364 transitions, 5390 flow [2024-06-27 23:02:01,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:01,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:01,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:01,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:02:01,974 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:01,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -872839072, now seen corresponding path program 3 times [2024-06-27 23:02:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249922029] [2024-06-27 23:02:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249922029] [2024-06-27 23:02:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249922029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443308424] [2024-06-27 23:02:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:02,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:02,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 364 transitions, 5390 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:02,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:02,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:02,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:03,021 INFO L124 PetriNetUnfolderBase]: 3239/5555 cut-off events. [2024-06-27 23:02:03,022 INFO L125 PetriNetUnfolderBase]: For 521643/521645 co-relation queries the response was YES. [2024-06-27 23:02:03,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45157 conditions, 5555 events. 3239/5555 cut-off events. For 521643/521645 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 37957 event pairs, 1030 based on Foata normal form. 6/5556 useless extension candidates. Maximal degree in co-relation 45021. Up to 4838 conditions per place. [2024-06-27 23:02:03,091 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 339 selfloop transitions, 41 changer transitions 0/387 dead transitions. [2024-06-27 23:02:03,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 387 transitions, 6295 flow [2024-06-27 23:02:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:03,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 23:02:03,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-27 23:02:03,092 INFO L175 Difference]: Start difference. First operand has 286 places, 364 transitions, 5390 flow. Second operand 7 states and 157 transitions. [2024-06-27 23:02:03,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 387 transitions, 6295 flow [2024-06-27 23:02:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 387 transitions, 6195 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:04,573 INFO L231 Difference]: Finished difference. Result has 290 places, 366 transitions, 5419 flow [2024-06-27 23:02:04,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=290, PETRI_TRANSITIONS=366} [2024-06-27 23:02:04,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 23:02:04,573 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 366 transitions, 5419 flow [2024-06-27 23:02:04,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:04,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:04,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:02:04,574 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:04,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash -243447268, now seen corresponding path program 1 times [2024-06-27 23:02:04,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:04,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121600330] [2024-06-27 23:02:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:04,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:04,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121600330] [2024-06-27 23:02:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121600330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:04,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60383110] [2024-06-27 23:02:04,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:04,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:04,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:04,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 366 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:04,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:04,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:05,645 INFO L124 PetriNetUnfolderBase]: 3279/5627 cut-off events. [2024-06-27 23:02:05,646 INFO L125 PetriNetUnfolderBase]: For 549365/549368 co-relation queries the response was YES. [2024-06-27 23:02:05,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45799 conditions, 5627 events. 3279/5627 cut-off events. For 549365/549368 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38648 event pairs, 1035 based on Foata normal form. 14/5636 useless extension candidates. Maximal degree in co-relation 45661. Up to 4822 conditions per place. [2024-06-27 23:02:05,722 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 335 selfloop transitions, 59 changer transitions 0/401 dead transitions. [2024-06-27 23:02:05,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 401 transitions, 6597 flow [2024-06-27 23:02:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 23:02:05,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 23:02:05,723 INFO L175 Difference]: Start difference. First operand has 290 places, 366 transitions, 5419 flow. Second operand 7 states and 170 transitions. [2024-06-27 23:02:05,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 401 transitions, 6597 flow [2024-06-27 23:02:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 401 transitions, 6369 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:02:07,159 INFO L231 Difference]: Finished difference. Result has 290 places, 367 transitions, 5353 flow [2024-06-27 23:02:07,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5205, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5353, PETRI_PLACES=290, PETRI_TRANSITIONS=367} [2024-06-27 23:02:07,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-27 23:02:07,159 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 367 transitions, 5353 flow [2024-06-27 23:02:07,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:07,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:07,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:07,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:02:07,160 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:07,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1411216074, now seen corresponding path program 2 times [2024-06-27 23:02:07,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:07,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518398106] [2024-06-27 23:02:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518398106] [2024-06-27 23:02:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518398106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:07,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:07,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042125284] [2024-06-27 23:02:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:07,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:07,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 367 transitions, 5353 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:07,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:07,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:07,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:08,238 INFO L124 PetriNetUnfolderBase]: 3419/5863 cut-off events. [2024-06-27 23:02:08,238 INFO L125 PetriNetUnfolderBase]: For 599215/599218 co-relation queries the response was YES. [2024-06-27 23:02:08,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48177 conditions, 5863 events. 3419/5863 cut-off events. For 599215/599218 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40578 event pairs, 1123 based on Foata normal form. 14/5874 useless extension candidates. Maximal degree in co-relation 48041. Up to 5150 conditions per place. [2024-06-27 23:02:08,314 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 341 selfloop transitions, 53 changer transitions 0/401 dead transitions. [2024-06-27 23:02:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 401 transitions, 6549 flow [2024-06-27 23:02:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 23:02:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 23:02:08,315 INFO L175 Difference]: Start difference. First operand has 290 places, 367 transitions, 5353 flow. Second operand 8 states and 185 transitions. [2024-06-27 23:02:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 401 transitions, 6549 flow [2024-06-27 23:02:10,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 401 transitions, 6417 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:10,013 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 5444 flow [2024-06-27 23:02:10,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5225, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5444, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-27 23:02:10,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-27 23:02:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 5444 flow [2024-06-27 23:02:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:10,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:10,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:02:10,014 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:10,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1498055754, now seen corresponding path program 3 times [2024-06-27 23:02:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501399887] [2024-06-27 23:02:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:10,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:10,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501399887] [2024-06-27 23:02:10,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501399887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:10,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325019634] [2024-06-27 23:02:10,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:10,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:10,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 5444 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:10,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:10,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:10,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:11,314 INFO L124 PetriNetUnfolderBase]: 3411/5855 cut-off events. [2024-06-27 23:02:11,314 INFO L125 PetriNetUnfolderBase]: For 607834/607837 co-relation queries the response was YES. [2024-06-27 23:02:11,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47399 conditions, 5855 events. 3411/5855 cut-off events. For 607834/607837 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40568 event pairs, 1135 based on Foata normal form. 26/5878 useless extension candidates. Maximal degree in co-relation 47261. Up to 5201 conditions per place. [2024-06-27 23:02:11,382 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 338 selfloop transitions, 52 changer transitions 0/397 dead transitions. [2024-06-27 23:02:11,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 397 transitions, 6407 flow [2024-06-27 23:02:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 23:02:11,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 23:02:11,383 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 5444 flow. Second operand 7 states and 163 transitions. [2024-06-27 23:02:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 397 transitions, 6407 flow [2024-06-27 23:02:13,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 397 transitions, 6269 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:13,137 INFO L231 Difference]: Finished difference. Result has 297 places, 373 transitions, 5464 flow [2024-06-27 23:02:13,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5464, PETRI_PLACES=297, PETRI_TRANSITIONS=373} [2024-06-27 23:02:13,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-27 23:02:13,138 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 373 transitions, 5464 flow [2024-06-27 23:02:13,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:13,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:13,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:13,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:02:13,138 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:13,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 693121772, now seen corresponding path program 4 times [2024-06-27 23:02:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414168694] [2024-06-27 23:02:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414168694] [2024-06-27 23:02:13,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414168694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:13,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:13,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167073914] [2024-06-27 23:02:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:13,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:13,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:13,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:13,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 373 transitions, 5464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-27 23:02:13,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:13,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:13,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:14,276 INFO L124 PetriNetUnfolderBase]: 3507/6018 cut-off events. [2024-06-27 23:02:14,276 INFO L125 PetriNetUnfolderBase]: For 606093/606104 co-relation queries the response was YES. [2024-06-27 23:02:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48879 conditions, 6018 events. 3507/6018 cut-off events. For 606093/606104 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41992 event pairs, 1068 based on Foata normal form. 20/6033 useless extension candidates. Maximal degree in co-relation 48740. Up to 5123 conditions per place. [2024-06-27 23:02:14,355 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 344 selfloop transitions, 52 changer transitions 0/403 dead transitions. [2024-06-27 23:02:14,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 403 transitions, 6626 flow [2024-06-27 23:02:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 23:02:14,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 23:02:14,356 INFO L175 Difference]: Start difference. First operand has 297 places, 373 transitions, 5464 flow. Second operand 6 states and 153 transitions. [2024-06-27 23:02:14,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 403 transitions, 6626 flow [2024-06-27 23:02:16,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 6529 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:16,103 INFO L231 Difference]: Finished difference. Result has 300 places, 377 transitions, 5607 flow [2024-06-27 23:02:16,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5607, PETRI_PLACES=300, PETRI_TRANSITIONS=377} [2024-06-27 23:02:16,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-27 23:02:16,107 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 377 transitions, 5607 flow [2024-06-27 23:02:16,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-27 23:02:16,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:16,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:02:16,107 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:16,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash 698847224, now seen corresponding path program 1 times [2024-06-27 23:02:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557586778] [2024-06-27 23:02:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557586778] [2024-06-27 23:02:16,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557586778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:16,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:16,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:02:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890913275] [2024-06-27 23:02:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:02:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:02:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:02:16,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:16,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 377 transitions, 5607 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-27 23:02:16,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:16,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:16,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:17,250 INFO L124 PetriNetUnfolderBase]: 3521/6044 cut-off events. [2024-06-27 23:02:17,250 INFO L125 PetriNetUnfolderBase]: For 609789/609800 co-relation queries the response was YES. [2024-06-27 23:02:17,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48798 conditions, 6044 events. 3521/6044 cut-off events. For 609789/609800 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42159 event pairs, 1062 based on Foata normal form. 26/6065 useless extension candidates. Maximal degree in co-relation 48657. Up to 5155 conditions per place. [2024-06-27 23:02:17,331 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 345 selfloop transitions, 53 changer transitions 0/405 dead transitions. [2024-06-27 23:02:17,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 405 transitions, 6625 flow [2024-06-27 23:02:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:02:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:02:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 23:02:17,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 23:02:17,332 INFO L175 Difference]: Start difference. First operand has 300 places, 377 transitions, 5607 flow. Second operand 6 states and 152 transitions. [2024-06-27 23:02:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 405 transitions, 6625 flow [2024-06-27 23:02:19,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 405 transitions, 6512 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 23:02:19,307 INFO L231 Difference]: Finished difference. Result has 305 places, 382 transitions, 5754 flow [2024-06-27 23:02:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5522, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5754, PETRI_PLACES=305, PETRI_TRANSITIONS=382} [2024-06-27 23:02:19,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 23:02:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 382 transitions, 5754 flow [2024-06-27 23:02:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-27 23:02:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:02:19,307 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-27 23:02:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038477040] [2024-06-27 23:02:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038477040] [2024-06-27 23:02:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038477040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:19,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:02:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528993109] [2024-06-27 23:02:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:19,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:02:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:02:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:02:19,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:19,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 382 transitions, 5754 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:19,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:19,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:19,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:20,510 INFO L124 PetriNetUnfolderBase]: 3518/6040 cut-off events. [2024-06-27 23:02:20,511 INFO L125 PetriNetUnfolderBase]: For 578850/578861 co-relation queries the response was YES. [2024-06-27 23:02:20,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48944 conditions, 6040 events. 3518/6040 cut-off events. For 578850/578861 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42192 event pairs, 1179 based on Foata normal form. 9/6044 useless extension candidates. Maximal degree in co-relation 48800. Up to 5265 conditions per place. [2024-06-27 23:02:20,590 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 143 changer transitions 0/416 dead transitions. [2024-06-27 23:02:20,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 416 transitions, 6800 flow [2024-06-27 23:02:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:02:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:02:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-27 23:02:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772727272727273 [2024-06-27 23:02:20,591 INFO L175 Difference]: Start difference. First operand has 305 places, 382 transitions, 5754 flow. Second operand 11 states and 254 transitions. [2024-06-27 23:02:20,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 416 transitions, 6800 flow [2024-06-27 23:02:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 416 transitions, 6672 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 23:02:23,040 INFO L231 Difference]: Finished difference. Result has 313 places, 382 transitions, 5918 flow [2024-06-27 23:02:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5918, PETRI_PLACES=313, PETRI_TRANSITIONS=382} [2024-06-27 23:02:23,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-27 23:02:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 382 transitions, 5918 flow [2024-06-27 23:02:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:23,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:02:23,041 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:23,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 211256563, now seen corresponding path program 1 times [2024-06-27 23:02:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:23,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921117288] [2024-06-27 23:02:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:23,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921117288] [2024-06-27 23:02:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921117288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:23,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:23,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355466320] [2024-06-27 23:02:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:23,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:23,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:23,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:23,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 382 transitions, 5918 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:23,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:23,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:23,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:24,240 INFO L124 PetriNetUnfolderBase]: 3526/6044 cut-off events. [2024-06-27 23:02:24,240 INFO L125 PetriNetUnfolderBase]: For 597293/597304 co-relation queries the response was YES. [2024-06-27 23:02:24,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 6044 events. 3526/6044 cut-off events. For 597293/597304 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42175 event pairs, 1082 based on Foata normal form. 10/6049 useless extension candidates. Maximal degree in co-relation 49127. Up to 5348 conditions per place. [2024-06-27 23:02:24,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 338 selfloop transitions, 68 changer transitions 0/413 dead transitions. [2024-06-27 23:02:24,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 413 transitions, 7181 flow [2024-06-27 23:02:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 23:02:24,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 23:02:24,325 INFO L175 Difference]: Start difference. First operand has 313 places, 382 transitions, 5918 flow. Second operand 7 states and 169 transitions. [2024-06-27 23:02:24,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 413 transitions, 7181 flow [2024-06-27 23:02:26,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 413 transitions, 6861 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 23:02:26,403 INFO L231 Difference]: Finished difference. Result has 311 places, 390 transitions, 5989 flow [2024-06-27 23:02:26,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5989, PETRI_PLACES=311, PETRI_TRANSITIONS=390} [2024-06-27 23:02:26,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 23:02:26,404 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 390 transitions, 5989 flow [2024-06-27 23:02:26,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:26,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:26,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:02:26,404 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:26,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 214113523, now seen corresponding path program 2 times [2024-06-27 23:02:26,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:26,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815455180] [2024-06-27 23:02:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:26,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:26,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815455180] [2024-06-27 23:02:26,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815455180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:26,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:26,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:02:26,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291802395] [2024-06-27 23:02:26,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:26,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:02:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:02:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:02:26,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:26,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 390 transitions, 5989 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:26,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:26,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:26,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:27,672 INFO L124 PetriNetUnfolderBase]: 3521/6043 cut-off events. [2024-06-27 23:02:27,672 INFO L125 PetriNetUnfolderBase]: For 607084/607095 co-relation queries the response was YES. [2024-06-27 23:02:27,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49251 conditions, 6043 events. 3521/6043 cut-off events. For 607084/607095 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42230 event pairs, 1170 based on Foata normal form. 10/6046 useless extension candidates. Maximal degree in co-relation 49104. Up to 5444 conditions per place. [2024-06-27 23:02:27,748 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 339 selfloop transitions, 59 changer transitions 0/405 dead transitions. [2024-06-27 23:02:27,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 405 transitions, 6821 flow [2024-06-27 23:02:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:02:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:02:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 23:02:27,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:02:27,749 INFO L175 Difference]: Start difference. First operand has 311 places, 390 transitions, 5989 flow. Second operand 7 states and 161 transitions. [2024-06-27 23:02:27,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 405 transitions, 6821 flow [2024-06-27 23:02:29,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 405 transitions, 6587 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 23:02:29,933 INFO L231 Difference]: Finished difference. Result has 314 places, 390 transitions, 5881 flow [2024-06-27 23:02:29,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5881, PETRI_PLACES=314, PETRI_TRANSITIONS=390} [2024-06-27 23:02:29,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 23:02:29,934 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 390 transitions, 5881 flow [2024-06-27 23:02:29,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:02:29,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:29,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:02:29,934 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:29,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 38618710, now seen corresponding path program 2 times [2024-06-27 23:02:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:29,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669642795] [2024-06-27 23:02:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:30,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:30,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669642795] [2024-06-27 23:02:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669642795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:30,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:30,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:02:30,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577388695] [2024-06-27 23:02:30,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:30,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:02:30,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:02:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:02:30,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:02:30,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 390 transitions, 5881 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:30,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:30,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:02:30,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:31,249 INFO L124 PetriNetUnfolderBase]: 3526/6054 cut-off events. [2024-06-27 23:02:31,249 INFO L125 PetriNetUnfolderBase]: For 618810/618821 co-relation queries the response was YES. [2024-06-27 23:02:31,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49357 conditions, 6054 events. 3526/6054 cut-off events. For 618810/618821 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42359 event pairs, 1174 based on Foata normal form. 9/6058 useless extension candidates. Maximal degree in co-relation 49207. Up to 5345 conditions per place. [2024-06-27 23:02:31,333 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 107 changer transitions 0/418 dead transitions. [2024-06-27 23:02:31,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 418 transitions, 6963 flow [2024-06-27 23:02:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:02:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:02:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 23:02:31,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 23:02:31,334 INFO L175 Difference]: Start difference. First operand has 314 places, 390 transitions, 5881 flow. Second operand 8 states and 185 transitions. [2024-06-27 23:02:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 418 transitions, 6963 flow [2024-06-27 23:02:33,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 418 transitions, 6821 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:33,892 INFO L231 Difference]: Finished difference. Result has 317 places, 393 transitions, 6005 flow [2024-06-27 23:02:33,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5739, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=317, PETRI_TRANSITIONS=393} [2024-06-27 23:02:33,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 23:02:33,892 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 393 transitions, 6005 flow [2024-06-27 23:02:33,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:33,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:33,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:33,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:02:33,893 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:33,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:33,893 INFO L85 PathProgramCache]: Analyzing trace with hash 204852490, now seen corresponding path program 3 times [2024-06-27 23:02:33,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:33,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160508235] [2024-06-27 23:02:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:33,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:34,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:34,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160508235] [2024-06-27 23:02:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160508235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:34,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:34,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:02:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922474322] [2024-06-27 23:02:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:34,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:02:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:02:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:02:34,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:02:34,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 393 transitions, 6005 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:34,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:34,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:02:34,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:35,340 INFO L124 PetriNetUnfolderBase]: 3531/6063 cut-off events. [2024-06-27 23:02:35,340 INFO L125 PetriNetUnfolderBase]: For 634683/634694 co-relation queries the response was YES. [2024-06-27 23:02:35,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49695 conditions, 6063 events. 3531/6063 cut-off events. For 634683/634694 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42429 event pairs, 1174 based on Foata normal form. 9/6067 useless extension candidates. Maximal degree in co-relation 49544. Up to 5351 conditions per place. [2024-06-27 23:02:35,410 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 300 selfloop transitions, 120 changer transitions 0/426 dead transitions. [2024-06-27 23:02:35,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 426 transitions, 7123 flow [2024-06-27 23:02:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:02:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:02:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-27 23:02:35,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-27 23:02:35,411 INFO L175 Difference]: Start difference. First operand has 317 places, 393 transitions, 6005 flow. Second operand 11 states and 237 transitions. [2024-06-27 23:02:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 426 transitions, 7123 flow [2024-06-27 23:02:37,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 426 transitions, 6945 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:02:37,738 INFO L231 Difference]: Finished difference. Result has 323 places, 396 transitions, 6125 flow [2024-06-27 23:02:37,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6125, PETRI_PLACES=323, PETRI_TRANSITIONS=396} [2024-06-27 23:02:37,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-27 23:02:37,739 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 396 transitions, 6125 flow [2024-06-27 23:02:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:37,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:37,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:02:37,739 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:37,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 214106920, now seen corresponding path program 4 times [2024-06-27 23:02:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352020593] [2024-06-27 23:02:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:37,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:37,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352020593] [2024-06-27 23:02:37,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352020593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:37,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:37,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:02:37,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220953492] [2024-06-27 23:02:37,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:37,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:02:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:02:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:02:37,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:02:37,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 396 transitions, 6125 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:37,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:37,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:02:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:39,109 INFO L124 PetriNetUnfolderBase]: 3536/6076 cut-off events. [2024-06-27 23:02:39,109 INFO L125 PetriNetUnfolderBase]: For 650556/650567 co-relation queries the response was YES. [2024-06-27 23:02:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50010 conditions, 6076 events. 3536/6076 cut-off events. For 650556/650567 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42582 event pairs, 1176 based on Foata normal form. 9/6080 useless extension candidates. Maximal degree in co-relation 49857. Up to 5357 conditions per place. [2024-06-27 23:02:39,197 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 298 selfloop transitions, 126 changer transitions 0/430 dead transitions. [2024-06-27 23:02:39,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 430 transitions, 7256 flow [2024-06-27 23:02:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 23:02:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 23:02:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 303 transitions. [2024-06-27 23:02:39,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-27 23:02:39,198 INFO L175 Difference]: Start difference. First operand has 323 places, 396 transitions, 6125 flow. Second operand 15 states and 303 transitions. [2024-06-27 23:02:39,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 430 transitions, 7256 flow [2024-06-27 23:02:41,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 430 transitions, 6988 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 23:02:41,954 INFO L231 Difference]: Finished difference. Result has 329 places, 399 transitions, 6170 flow [2024-06-27 23:02:41,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5863, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6170, PETRI_PLACES=329, PETRI_TRANSITIONS=399} [2024-06-27 23:02:41,955 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 23:02:41,955 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 399 transitions, 6170 flow [2024-06-27 23:02:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:41,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:41,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:41,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:02:41,956 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:41,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash 214118080, now seen corresponding path program 5 times [2024-06-27 23:02:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541451035] [2024-06-27 23:02:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:41,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541451035] [2024-06-27 23:02:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541451035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:42,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:42,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:02:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992440840] [2024-06-27 23:02:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:02:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:02:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:02:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-27 23:02:42,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 399 transitions, 6170 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:42,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:42,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-27 23:02:42,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:43,357 INFO L124 PetriNetUnfolderBase]: 3533/6052 cut-off events. [2024-06-27 23:02:43,357 INFO L125 PetriNetUnfolderBase]: For 669799/669810 co-relation queries the response was YES. [2024-06-27 23:02:43,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50075 conditions, 6052 events. 3533/6052 cut-off events. For 669799/669810 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42272 event pairs, 1156 based on Foata normal form. 9/6056 useless extension candidates. Maximal degree in co-relation 49921. Up to 5354 conditions per place. [2024-06-27 23:02:43,448 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 295 selfloop transitions, 126 changer transitions 0/427 dead transitions. [2024-06-27 23:02:43,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 427 transitions, 7080 flow [2024-06-27 23:02:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:02:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:02:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-27 23:02:43,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-06-27 23:02:43,449 INFO L175 Difference]: Start difference. First operand has 329 places, 399 transitions, 6170 flow. Second operand 13 states and 268 transitions. [2024-06-27 23:02:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 427 transitions, 7080 flow [2024-06-27 23:02:46,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 427 transitions, 6526 flow, removed 22 selfloop flow, removed 16 redundant places. [2024-06-27 23:02:46,121 INFO L231 Difference]: Finished difference. Result has 326 places, 399 transitions, 5874 flow [2024-06-27 23:02:46,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5616, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5874, PETRI_PLACES=326, PETRI_TRANSITIONS=399} [2024-06-27 23:02:46,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-27 23:02:46,122 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 399 transitions, 5874 flow [2024-06-27 23:02:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 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) [2024-06-27 23:02:46,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:46,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:46,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:02:46,122 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:46,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:46,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1075407114, now seen corresponding path program 6 times [2024-06-27 23:02:46,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:46,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548472549] [2024-06-27 23:02:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:46,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548472549] [2024-06-27 23:02:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548472549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:02:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056036393] [2024-06-27 23:02:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:02:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:02:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:02:46,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:46,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 399 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:46,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:46,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:46,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:47,419 INFO L124 PetriNetUnfolderBase]: 3538/6063 cut-off events. [2024-06-27 23:02:47,420 INFO L125 PetriNetUnfolderBase]: For 683251/683262 co-relation queries the response was YES. [2024-06-27 23:02:47,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49942 conditions, 6063 events. 3538/6063 cut-off events. For 683251/683262 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42339 event pairs, 1176 based on Foata normal form. 9/6065 useless extension candidates. Maximal degree in co-relation 49789. Up to 5227 conditions per place. [2024-06-27 23:02:47,507 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 203 changer transitions 0/437 dead transitions. [2024-06-27 23:02:47,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 437 transitions, 7343 flow [2024-06-27 23:02:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:02:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:02:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-27 23:02:47,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:02:47,508 INFO L175 Difference]: Start difference. First operand has 326 places, 399 transitions, 5874 flow. Second operand 10 states and 240 transitions. [2024-06-27 23:02:47,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 437 transitions, 7343 flow [2024-06-27 23:02:49,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 437 transitions, 7091 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 23:02:49,987 INFO L231 Difference]: Finished difference. Result has 324 places, 402 transitions, 6083 flow [2024-06-27 23:02:49,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6083, PETRI_PLACES=324, PETRI_TRANSITIONS=402} [2024-06-27 23:02:49,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 23:02:49,987 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 402 transitions, 6083 flow [2024-06-27 23:02:49,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:49,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:49,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:49,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:02:49,988 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:49,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1435828334, now seen corresponding path program 7 times [2024-06-27 23:02:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:49,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564299597] [2024-06-27 23:02:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564299597] [2024-06-27 23:02:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564299597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:50,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:50,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:02:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724754507] [2024-06-27 23:02:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:50,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:02:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:02:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:02:50,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:50,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 402 transitions, 6083 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:50,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:50,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:50,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:51,257 INFO L124 PetriNetUnfolderBase]: 3556/6106 cut-off events. [2024-06-27 23:02:51,257 INFO L125 PetriNetUnfolderBase]: For 696464/696475 co-relation queries the response was YES. [2024-06-27 23:02:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50673 conditions, 6106 events. 3556/6106 cut-off events. For 696464/696475 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42821 event pairs, 1192 based on Foata normal form. 9/6108 useless extension candidates. Maximal degree in co-relation 50520. Up to 5246 conditions per place. [2024-06-27 23:02:51,339 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 232 selfloop transitions, 213 changer transitions 0/452 dead transitions. [2024-06-27 23:02:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 452 transitions, 7868 flow [2024-06-27 23:02:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 23:02:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 23:02:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 331 transitions. [2024-06-27 23:02:51,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516666666666666 [2024-06-27 23:02:51,340 INFO L175 Difference]: Start difference. First operand has 324 places, 402 transitions, 6083 flow. Second operand 15 states and 331 transitions. [2024-06-27 23:02:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 452 transitions, 7868 flow [2024-06-27 23:02:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 452 transitions, 7410 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:02:54,645 INFO L231 Difference]: Finished difference. Result has 331 places, 411 transitions, 6214 flow [2024-06-27 23:02:54,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5643, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6214, PETRI_PLACES=331, PETRI_TRANSITIONS=411} [2024-06-27 23:02:54,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 23:02:54,645 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 411 transitions, 6214 flow [2024-06-27 23:02:54,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:54,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:54,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:02:54,646 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1084672704, now seen corresponding path program 8 times [2024-06-27 23:02:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415470759] [2024-06-27 23:02:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415470759] [2024-06-27 23:02:54,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415470759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:54,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:54,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:02:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604197106] [2024-06-27 23:02:54,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:02:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:02:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:02:54,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:54,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 411 transitions, 6214 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:54,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:54,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:54,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:02:55,954 INFO L124 PetriNetUnfolderBase]: 3553/6106 cut-off events. [2024-06-27 23:02:55,954 INFO L125 PetriNetUnfolderBase]: For 709098/709109 co-relation queries the response was YES. [2024-06-27 23:02:56,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50740 conditions, 6106 events. 3553/6106 cut-off events. For 709098/709109 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 42829 event pairs, 1194 based on Foata normal form. 9/6108 useless extension candidates. Maximal degree in co-relation 50586. Up to 5243 conditions per place. [2024-06-27 23:02:56,043 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 229 selfloop transitions, 213 changer transitions 0/449 dead transitions. [2024-06-27 23:02:56,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 449 transitions, 7676 flow [2024-06-27 23:02:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:02:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:02:56,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-27 23:02:56,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653846153846154 [2024-06-27 23:02:56,044 INFO L175 Difference]: Start difference. First operand has 331 places, 411 transitions, 6214 flow. Second operand 13 states and 294 transitions. [2024-06-27 23:02:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 449 transitions, 7676 flow [2024-06-27 23:02:59,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 449 transitions, 7236 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-27 23:02:59,616 INFO L231 Difference]: Finished difference. Result has 334 places, 411 transitions, 6206 flow [2024-06-27 23:02:59,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5774, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6206, PETRI_PLACES=334, PETRI_TRANSITIONS=411} [2024-06-27 23:02:59,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-27 23:02:59,617 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 411 transitions, 6206 flow [2024-06-27 23:02:59,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:59,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:02:59,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:02:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:02:59,617 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:02:59,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:02:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash 295645176, now seen corresponding path program 9 times [2024-06-27 23:02:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:02:59,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120845139] [2024-06-27 23:02:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:02:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:02:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:02:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:02:59,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:02:59,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120845139] [2024-06-27 23:02:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120845139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:02:59,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:02:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:02:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959031051] [2024-06-27 23:02:59,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:02:59,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:02:59,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:02:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:02:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:02:59,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:02:59,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 411 transitions, 6206 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:02:59,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:02:59,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:02:59,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:00,904 INFO L124 PetriNetUnfolderBase]: 3558/6101 cut-off events. [2024-06-27 23:03:00,905 INFO L125 PetriNetUnfolderBase]: For 732643/732654 co-relation queries the response was YES. [2024-06-27 23:03:00,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50946 conditions, 6101 events. 3558/6101 cut-off events. For 732643/732654 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42747 event pairs, 1172 based on Foata normal form. 9/6105 useless extension candidates. Maximal degree in co-relation 50790. Up to 5249 conditions per place. [2024-06-27 23:03:00,991 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 217 changer transitions 0/445 dead transitions. [2024-06-27 23:03:00,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 445 transitions, 7703 flow [2024-06-27 23:03:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:03:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:03:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-27 23:03:00,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 23:03:00,993 INFO L175 Difference]: Start difference. First operand has 334 places, 411 transitions, 6206 flow. Second operand 12 states and 268 transitions. [2024-06-27 23:03:00,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 445 transitions, 7703 flow [2024-06-27 23:03:04,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 445 transitions, 7271 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 23:03:04,177 INFO L231 Difference]: Finished difference. Result has 334 places, 414 transitions, 6269 flow [2024-06-27 23:03:04,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6269, PETRI_PLACES=334, PETRI_TRANSITIONS=414} [2024-06-27 23:03:04,178 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-27 23:03:04,178 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 414 transitions, 6269 flow [2024-06-27 23:03:04,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:03:04,178 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:04,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -818086104, now seen corresponding path program 10 times [2024-06-27 23:03:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:04,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69386636] [2024-06-27 23:03:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:04,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69386636] [2024-06-27 23:03:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69386636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:04,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:04,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:04,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768497207] [2024-06-27 23:03:04,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:04,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:04,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:04,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 414 transitions, 6269 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:04,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:04,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:04,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:05,444 INFO L124 PetriNetUnfolderBase]: 3563/6108 cut-off events. [2024-06-27 23:03:05,444 INFO L125 PetriNetUnfolderBase]: For 749439/749450 co-relation queries the response was YES. [2024-06-27 23:03:05,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51218 conditions, 6108 events. 3563/6108 cut-off events. For 749439/749450 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42714 event pairs, 1176 based on Foata normal form. 9/6110 useless extension candidates. Maximal degree in co-relation 51061. Up to 5255 conditions per place. [2024-06-27 23:03:05,525 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 220 changer transitions 0/449 dead transitions. [2024-06-27 23:03:05,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 449 transitions, 7782 flow [2024-06-27 23:03:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:03:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:03:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-27 23:03:05,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-27 23:03:05,526 INFO L175 Difference]: Start difference. First operand has 334 places, 414 transitions, 6269 flow. Second operand 13 states and 285 transitions. [2024-06-27 23:03:05,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 449 transitions, 7782 flow [2024-06-27 23:03:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 449 transitions, 7258 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 23:03:08,576 INFO L231 Difference]: Finished difference. Result has 337 places, 417 transitions, 6246 flow [2024-06-27 23:03:08,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6246, PETRI_PLACES=337, PETRI_TRANSITIONS=417} [2024-06-27 23:03:08,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 23:03:08,577 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 417 transitions, 6246 flow [2024-06-27 23:03:08,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:08,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:08,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:03:08,577 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:08,578 INFO L85 PathProgramCache]: Analyzing trace with hash -818074944, now seen corresponding path program 11 times [2024-06-27 23:03:08,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337037113] [2024-06-27 23:03:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:08,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:08,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337037113] [2024-06-27 23:03:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337037113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:08,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:08,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342418822] [2024-06-27 23:03:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:08,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:08,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:08,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 417 transitions, 6246 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:08,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:08,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:08,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:09,830 INFO L124 PetriNetUnfolderBase]: 3560/6108 cut-off events. [2024-06-27 23:03:09,831 INFO L125 PetriNetUnfolderBase]: For 762819/762830 co-relation queries the response was YES. [2024-06-27 23:03:09,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51037 conditions, 6108 events. 3560/6108 cut-off events. For 762819/762830 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42827 event pairs, 1180 based on Foata normal form. 9/6110 useless extension candidates. Maximal degree in co-relation 50881. Up to 5252 conditions per place. [2024-06-27 23:03:09,918 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 220 changer transitions 0/448 dead transitions. [2024-06-27 23:03:09,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 448 transitions, 7538 flow [2024-06-27 23:03:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:03:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:03:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-27 23:03:09,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2024-06-27 23:03:09,924 INFO L175 Difference]: Start difference. First operand has 337 places, 417 transitions, 6246 flow. Second operand 13 states and 284 transitions. [2024-06-27 23:03:09,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 448 transitions, 7538 flow [2024-06-27 23:03:13,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 448 transitions, 6851 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-06-27 23:03:13,635 INFO L231 Difference]: Finished difference. Result has 337 places, 417 transitions, 6005 flow [2024-06-27 23:03:13,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6005, PETRI_PLACES=337, PETRI_TRANSITIONS=417} [2024-06-27 23:03:13,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 23:03:13,636 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 417 transitions, 6005 flow [2024-06-27 23:03:13,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:13,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:13,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:03:13,636 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:13,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash 11629013, now seen corresponding path program 3 times [2024-06-27 23:03:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404158644] [2024-06-27 23:03:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:13,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404158644] [2024-06-27 23:03:13,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404158644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:13,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:13,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005449533] [2024-06-27 23:03:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:13,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:13,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:13,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:13,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 417 transitions, 6005 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:03:13,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:13,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:13,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:14,869 INFO L124 PetriNetUnfolderBase]: 3596/6153 cut-off events. [2024-06-27 23:03:14,869 INFO L125 PetriNetUnfolderBase]: For 812845/812856 co-relation queries the response was YES. [2024-06-27 23:03:14,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51573 conditions, 6153 events. 3596/6153 cut-off events. For 812845/812856 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 43059 event pairs, 1167 based on Foata normal form. 18/6166 useless extension candidates. Maximal degree in co-relation 51418. Up to 5475 conditions per place. [2024-06-27 23:03:14,956 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 362 selfloop transitions, 74 changer transitions 0/443 dead transitions. [2024-06-27 23:03:14,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 443 transitions, 7039 flow [2024-06-27 23:03:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 23:03:14,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-27 23:03:14,957 INFO L175 Difference]: Start difference. First operand has 337 places, 417 transitions, 6005 flow. Second operand 7 states and 171 transitions. [2024-06-27 23:03:14,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 443 transitions, 7039 flow [2024-06-27 23:03:18,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 443 transitions, 6599 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 23:03:18,386 INFO L231 Difference]: Finished difference. Result has 332 places, 419 transitions, 5796 flow [2024-06-27 23:03:18,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5796, PETRI_PLACES=332, PETRI_TRANSITIONS=419} [2024-06-27 23:03:18,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-27 23:03:18,386 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 419 transitions, 5796 flow [2024-06-27 23:03:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:03:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:03:18,387 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:18,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:18,387 INFO L85 PathProgramCache]: Analyzing trace with hash 11925683, now seen corresponding path program 4 times [2024-06-27 23:03:18,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572581655] [2024-06-27 23:03:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:18,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572581655] [2024-06-27 23:03:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572581655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:18,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:18,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:03:18,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17679009] [2024-06-27 23:03:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:18,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:03:18,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:03:18,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:03:18,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:18,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 419 transitions, 5796 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:03:18,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:18,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:18,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:19,623 INFO L124 PetriNetUnfolderBase]: 3619/6207 cut-off events. [2024-06-27 23:03:19,623 INFO L125 PetriNetUnfolderBase]: For 817887/817898 co-relation queries the response was YES. [2024-06-27 23:03:19,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51744 conditions, 6207 events. 3619/6207 cut-off events. For 817887/817898 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43551 event pairs, 1074 based on Foata normal form. 18/6220 useless extension candidates. Maximal degree in co-relation 51588. Up to 5299 conditions per place. [2024-06-27 23:03:19,709 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 359 selfloop transitions, 83 changer transitions 0/449 dead transitions. [2024-06-27 23:03:19,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 449 transitions, 7028 flow [2024-06-27 23:03:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:03:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:03:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 23:03:19,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 23:03:19,710 INFO L175 Difference]: Start difference. First operand has 332 places, 419 transitions, 5796 flow. Second operand 7 states and 175 transitions. [2024-06-27 23:03:19,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 449 transitions, 7028 flow [2024-06-27 23:03:23,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 449 transitions, 6813 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 23:03:23,485 INFO L231 Difference]: Finished difference. Result has 335 places, 420 transitions, 5821 flow [2024-06-27 23:03:23,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5821, PETRI_PLACES=335, PETRI_TRANSITIONS=420} [2024-06-27 23:03:23,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-27 23:03:23,485 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 420 transitions, 5821 flow [2024-06-27 23:03:23,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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) [2024-06-27 23:03:23,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:23,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:23,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:03:23,486 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:23,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash 175122920, now seen corresponding path program 12 times [2024-06-27 23:03:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:23,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313756495] [2024-06-27 23:03:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:23,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313756495] [2024-06-27 23:03:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313756495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:23,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:23,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:23,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289603661] [2024-06-27 23:03:23,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:23,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:23,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:23,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 420 transitions, 5821 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:24,851 INFO L124 PetriNetUnfolderBase]: 3624/6216 cut-off events. [2024-06-27 23:03:24,851 INFO L125 PetriNetUnfolderBase]: For 801669/801680 co-relation queries the response was YES. [2024-06-27 23:03:24,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52069 conditions, 6216 events. 3624/6216 cut-off events. For 801669/801680 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 43667 event pairs, 1193 based on Foata normal form. 9/6220 useless extension candidates. Maximal degree in co-relation 51911. Up to 5470 conditions per place. [2024-06-27 23:03:24,938 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 121 changer transitions 0/450 dead transitions. [2024-06-27 23:03:24,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 450 transitions, 7179 flow [2024-06-27 23:03:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:03:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:03:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-27 23:03:24,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-27 23:03:24,939 INFO L175 Difference]: Start difference. First operand has 335 places, 420 transitions, 5821 flow. Second operand 11 states and 247 transitions. [2024-06-27 23:03:24,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 450 transitions, 7179 flow [2024-06-27 23:03:29,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 450 transitions, 7031 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 23:03:29,364 INFO L231 Difference]: Finished difference. Result has 343 places, 424 transitions, 5989 flow [2024-06-27 23:03:29,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5989, PETRI_PLACES=343, PETRI_TRANSITIONS=424} [2024-06-27 23:03:29,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-27 23:03:29,365 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 424 transitions, 5989 flow [2024-06-27 23:03:29,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:29,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:29,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:29,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:03:29,365 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:29,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1482286356, now seen corresponding path program 13 times [2024-06-27 23:03:29,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:29,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139142417] [2024-06-27 23:03:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:29,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:29,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139142417] [2024-06-27 23:03:29,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139142417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:29,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:29,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:29,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698225003] [2024-06-27 23:03:29,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:29,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:29,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:29,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 424 transitions, 5989 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:29,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:29,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:29,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:30,743 INFO L124 PetriNetUnfolderBase]: 3629/6233 cut-off events. [2024-06-27 23:03:30,743 INFO L125 PetriNetUnfolderBase]: For 818387/818398 co-relation queries the response was YES. [2024-06-27 23:03:30,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52336 conditions, 6233 events. 3629/6233 cut-off events. For 818387/818398 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43847 event pairs, 1197 based on Foata normal form. 9/6237 useless extension candidates. Maximal degree in co-relation 52176. Up to 5476 conditions per place. [2024-06-27 23:03:30,831 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 124 changer transitions 0/459 dead transitions. [2024-06-27 23:03:30,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 7372 flow [2024-06-27 23:03:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:03:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:03:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 23:03:30,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:03:30,832 INFO L175 Difference]: Start difference. First operand has 343 places, 424 transitions, 5989 flow. Second operand 11 states and 253 transitions. [2024-06-27 23:03:30,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 7372 flow [2024-06-27 23:03:34,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 459 transitions, 7062 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 23:03:34,567 INFO L231 Difference]: Finished difference. Result has 346 places, 427 transitions, 5982 flow [2024-06-27 23:03:34,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5982, PETRI_PLACES=346, PETRI_TRANSITIONS=427} [2024-06-27 23:03:34,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 23:03:34,568 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 427 transitions, 5982 flow [2024-06-27 23:03:34,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:34,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:34,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:03:34,568 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:34,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 3359360, now seen corresponding path program 14 times [2024-06-27 23:03:34,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:34,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688769191] [2024-06-27 23:03:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688769191] [2024-06-27 23:03:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688769191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:34,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753477347] [2024-06-27 23:03:34,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:34,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:34,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:34,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:34,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 427 transitions, 5982 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:34,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:34,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:34,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:35,901 INFO L124 PetriNetUnfolderBase]: 3626/6213 cut-off events. [2024-06-27 23:03:35,902 INFO L125 PetriNetUnfolderBase]: For 838609/838620 co-relation queries the response was YES. [2024-06-27 23:03:35,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52356 conditions, 6213 events. 3626/6213 cut-off events. For 838609/838620 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43652 event pairs, 1181 based on Foata normal form. 9/6217 useless extension candidates. Maximal degree in co-relation 52195. Up to 5473 conditions per place. [2024-06-27 23:03:35,998 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 122 changer transitions 0/453 dead transitions. [2024-06-27 23:03:35,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 453 transitions, 7116 flow [2024-06-27 23:03:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:03:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:03:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 23:03:35,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 23:03:35,999 INFO L175 Difference]: Start difference. First operand has 346 places, 427 transitions, 5982 flow. Second operand 9 states and 213 transitions. [2024-06-27 23:03:35,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 453 transitions, 7116 flow [2024-06-27 23:03:39,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 453 transitions, 6714 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 23:03:39,802 INFO L231 Difference]: Finished difference. Result has 345 places, 427 transitions, 5830 flow [2024-06-27 23:03:39,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5580, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5830, PETRI_PLACES=345, PETRI_TRANSITIONS=427} [2024-06-27 23:03:39,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-27 23:03:39,802 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 427 transitions, 5830 flow [2024-06-27 23:03:39,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:39,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:39,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:39,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:03:39,803 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:39,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 175128500, now seen corresponding path program 15 times [2024-06-27 23:03:39,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:39,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800608084] [2024-06-27 23:03:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800608084] [2024-06-27 23:03:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800608084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:39,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339509071] [2024-06-27 23:03:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:39,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:39,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 427 transitions, 5830 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:39,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:39,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:39,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:41,190 INFO L124 PetriNetUnfolderBase]: 3623/6225 cut-off events. [2024-06-27 23:03:41,190 INFO L125 PetriNetUnfolderBase]: For 843535/843546 co-relation queries the response was YES. [2024-06-27 23:03:41,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52332 conditions, 6225 events. 3623/6225 cut-off events. For 843535/843546 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43859 event pairs, 1197 based on Foata normal form. 9/6229 useless extension candidates. Maximal degree in co-relation 52170. Up to 5470 conditions per place. [2024-06-27 23:03:41,279 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 320 selfloop transitions, 122 changer transitions 0/449 dead transitions. [2024-06-27 23:03:41,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 449 transitions, 6768 flow [2024-06-27 23:03:41,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:03:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:03:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:03:41,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:03:41,280 INFO L175 Difference]: Start difference. First operand has 345 places, 427 transitions, 5830 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:03:41,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 449 transitions, 6768 flow [2024-06-27 23:03:45,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 449 transitions, 6508 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 23:03:45,894 INFO L231 Difference]: Finished difference. Result has 346 places, 427 transitions, 5820 flow [2024-06-27 23:03:45,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5820, PETRI_PLACES=346, PETRI_TRANSITIONS=427} [2024-06-27 23:03:45,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 23:03:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 427 transitions, 5820 flow [2024-06-27 23:03:45,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:45,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:45,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:03:45,895 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:45,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1995686744, now seen corresponding path program 16 times [2024-06-27 23:03:45,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:45,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930537362] [2024-06-27 23:03:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:45,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930537362] [2024-06-27 23:03:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930537362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:46,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:46,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413050876] [2024-06-27 23:03:46,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:46,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:46,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:46,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:46,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 427 transitions, 5820 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:46,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:46,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:46,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:47,257 INFO L124 PetriNetUnfolderBase]: 3641/6256 cut-off events. [2024-06-27 23:03:47,257 INFO L125 PetriNetUnfolderBase]: For 865587/865598 co-relation queries the response was YES. [2024-06-27 23:03:47,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52817 conditions, 6256 events. 3641/6256 cut-off events. For 865587/865598 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44100 event pairs, 1197 based on Foata normal form. 9/6260 useless extension candidates. Maximal degree in co-relation 52654. Up to 5586 conditions per place. [2024-06-27 23:03:47,350 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 361 selfloop transitions, 88 changer transitions 0/456 dead transitions. [2024-06-27 23:03:47,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 456 transitions, 7088 flow [2024-06-27 23:03:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:03:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:03:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-27 23:03:47,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-27 23:03:47,351 INFO L175 Difference]: Start difference. First operand has 346 places, 427 transitions, 5820 flow. Second operand 12 states and 251 transitions. [2024-06-27 23:03:47,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 456 transitions, 7088 flow [2024-06-27 23:03:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 456 transitions, 6844 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 23:03:52,058 INFO L231 Difference]: Finished difference. Result has 350 places, 436 transitions, 5906 flow [2024-06-27 23:03:52,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5906, PETRI_PLACES=350, PETRI_TRANSITIONS=436} [2024-06-27 23:03:52,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 23:03:52,059 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 436 transitions, 5906 flow [2024-06-27 23:03:52,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:52,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:52,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:03:52,059 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:52,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2139571694, now seen corresponding path program 17 times [2024-06-27 23:03:52,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568595287] [2024-06-27 23:03:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:52,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:52,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568595287] [2024-06-27 23:03:52,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568595287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:52,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:52,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:52,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755704538] [2024-06-27 23:03:52,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:52,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:52,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:52,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 436 transitions, 5906 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:52,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:53,507 INFO L124 PetriNetUnfolderBase]: 3646/6245 cut-off events. [2024-06-27 23:03:53,508 INFO L125 PetriNetUnfolderBase]: For 891517/891528 co-relation queries the response was YES. [2024-06-27 23:03:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52967 conditions, 6245 events. 3646/6245 cut-off events. For 891517/891528 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43875 event pairs, 1177 based on Foata normal form. 9/6249 useless extension candidates. Maximal degree in co-relation 52803. Up to 5599 conditions per place. [2024-06-27 23:03:53,588 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 368 selfloop transitions, 84 changer transitions 0/459 dead transitions. [2024-06-27 23:03:53,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 459 transitions, 7098 flow [2024-06-27 23:03:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:03:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:03:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-27 23:03:53,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 23:03:53,589 INFO L175 Difference]: Start difference. First operand has 350 places, 436 transitions, 5906 flow. Second operand 12 states and 252 transitions. [2024-06-27 23:03:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 459 transitions, 7098 flow [2024-06-27 23:03:57,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 459 transitions, 6991 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:03:57,226 INFO L231 Difference]: Finished difference. Result has 356 places, 439 transitions, 6031 flow [2024-06-27 23:03:57,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5799, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6031, PETRI_PLACES=356, PETRI_TRANSITIONS=439} [2024-06-27 23:03:57,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 23:03:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 439 transitions, 6031 flow [2024-06-27 23:03:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:57,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:03:57,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:03:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:03:57,228 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:03:57,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:03:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2139577274, now seen corresponding path program 18 times [2024-06-27 23:03:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:03:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204439382] [2024-06-27 23:03:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:03:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:03:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:03:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:03:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:03:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204439382] [2024-06-27 23:03:57,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204439382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:03:57,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:03:57,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:03:57,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973583770] [2024-06-27 23:03:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:03:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:03:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:03:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:03:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:03:57,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:03:57,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 439 transitions, 6031 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:03:57,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:03:57,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:03:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:03:58,577 INFO L124 PetriNetUnfolderBase]: 3643/6241 cut-off events. [2024-06-27 23:03:58,577 INFO L125 PetriNetUnfolderBase]: For 905637/905648 co-relation queries the response was YES. [2024-06-27 23:03:58,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53184 conditions, 6241 events. 3643/6241 cut-off events. For 905637/905648 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43785 event pairs, 1177 based on Foata normal form. 9/6245 useless extension candidates. Maximal degree in co-relation 53018. Up to 5596 conditions per place. [2024-06-27 23:03:58,669 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 84 changer transitions 0/457 dead transitions. [2024-06-27 23:03:58,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 457 transitions, 6973 flow [2024-06-27 23:03:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:03:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:03:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 23:03:58,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-27 23:03:58,670 INFO L175 Difference]: Start difference. First operand has 356 places, 439 transitions, 6031 flow. Second operand 11 states and 234 transitions. [2024-06-27 23:03:58,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 457 transitions, 6973 flow [2024-06-27 23:04:02,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 457 transitions, 6524 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-06-27 23:04:02,346 INFO L231 Difference]: Finished difference. Result has 353 places, 439 transitions, 5756 flow [2024-06-27 23:04:02,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5756, PETRI_PLACES=353, PETRI_TRANSITIONS=439} [2024-06-27 23:04:02,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 23:04:02,347 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 439 transitions, 5756 flow [2024-06-27 23:04:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:02,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:02,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:04:02,347 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:02,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash -936110220, now seen corresponding path program 19 times [2024-06-27 23:04:02,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:02,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82605698] [2024-06-27 23:04:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82605698] [2024-06-27 23:04:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82605698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:02,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:04:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051838073] [2024-06-27 23:04:02,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:02,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:04:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:04:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:04:02,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:02,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 439 transitions, 5756 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-27 23:04:02,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:02,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:02,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:03,717 INFO L124 PetriNetUnfolderBase]: 3640/6241 cut-off events. [2024-06-27 23:04:03,717 INFO L125 PetriNetUnfolderBase]: For 917697/917708 co-relation queries the response was YES. [2024-06-27 23:04:03,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52861 conditions, 6241 events. 3640/6241 cut-off events. For 917697/917708 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43867 event pairs, 1181 based on Foata normal form. 9/6245 useless extension candidates. Maximal degree in co-relation 52697. Up to 5466 conditions per place. [2024-06-27 23:04:03,797 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 157 changer transitions 0/471 dead transitions. [2024-06-27 23:04:03,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 471 transitions, 6952 flow [2024-06-27 23:04:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:04:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:04:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 23:04:03,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 23:04:03,798 INFO L175 Difference]: Start difference. First operand has 353 places, 439 transitions, 5756 flow. Second operand 9 states and 221 transitions. [2024-06-27 23:04:03,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 471 transitions, 6952 flow [2024-06-27 23:04:07,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 471 transitions, 6772 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 23:04:07,530 INFO L231 Difference]: Finished difference. Result has 352 places, 439 transitions, 5905 flow [2024-06-27 23:04:07,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5905, PETRI_PLACES=352, PETRI_TRANSITIONS=439} [2024-06-27 23:04:07,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 23:04:07,531 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 439 transitions, 5905 flow [2024-06-27 23:04:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-27 23:04:07,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:07,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:07,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:04:07,531 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:07,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -349366002, now seen corresponding path program 20 times [2024-06-27 23:04:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612517194] [2024-06-27 23:04:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:07,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612517194] [2024-06-27 23:04:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612517194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:07,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:07,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:07,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278837971] [2024-06-27 23:04:07,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:07,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:07,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:07,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:07,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 439 transitions, 5905 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:07,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:07,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:07,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:08,866 INFO L124 PetriNetUnfolderBase]: 3637/6237 cut-off events. [2024-06-27 23:04:08,866 INFO L125 PetriNetUnfolderBase]: For 932112/932123 co-relation queries the response was YES. [2024-06-27 23:04:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53154 conditions, 6237 events. 3637/6237 cut-off events. For 932112/932123 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43916 event pairs, 1181 based on Foata normal form. 9/6241 useless extension candidates. Maximal degree in co-relation 52989. Up to 5582 conditions per place. [2024-06-27 23:04:08,959 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 363 selfloop transitions, 88 changer transitions 0/458 dead transitions. [2024-06-27 23:04:08,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 458 transitions, 6851 flow [2024-06-27 23:04:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:04:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:04:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-27 23:04:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 23:04:08,960 INFO L175 Difference]: Start difference. First operand has 352 places, 439 transitions, 5905 flow. Second operand 12 states and 250 transitions. [2024-06-27 23:04:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 458 transitions, 6851 flow [2024-06-27 23:04:13,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 458 transitions, 6456 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 23:04:13,647 INFO L231 Difference]: Finished difference. Result has 355 places, 439 transitions, 5692 flow [2024-06-27 23:04:13,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5692, PETRI_PLACES=355, PETRI_TRANSITIONS=439} [2024-06-27 23:04:13,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-27 23:04:13,648 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 439 transitions, 5692 flow [2024-06-27 23:04:13,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:13,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:13,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:04:13,648 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:13,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2143296344, now seen corresponding path program 21 times [2024-06-27 23:04:13,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:13,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12742264] [2024-06-27 23:04:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:13,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:13,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12742264] [2024-06-27 23:04:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12742264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:13,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:13,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599991830] [2024-06-27 23:04:13,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:13,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:13,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:13,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:13,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 439 transitions, 5692 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:13,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:13,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:13,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:15,047 INFO L124 PetriNetUnfolderBase]: 3634/6230 cut-off events. [2024-06-27 23:04:15,047 INFO L125 PetriNetUnfolderBase]: For 926983/926988 co-relation queries the response was YES. [2024-06-27 23:04:15,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52779 conditions, 6230 events. 3634/6230 cut-off events. For 926983/926988 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43842 event pairs, 1203 based on Foata normal form. 3/6226 useless extension candidates. Maximal degree in co-relation 52613. Up to 5369 conditions per place. [2024-06-27 23:04:15,131 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 195 changer transitions 0/457 dead transitions. [2024-06-27 23:04:15,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 457 transitions, 6634 flow [2024-06-27 23:04:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:04:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:04:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-27 23:04:15,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-27 23:04:15,132 INFO L175 Difference]: Start difference. First operand has 355 places, 439 transitions, 5692 flow. Second operand 11 states and 238 transitions. [2024-06-27 23:04:15,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 457 transitions, 6634 flow [2024-06-27 23:04:18,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 457 transitions, 6448 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 23:04:18,985 INFO L231 Difference]: Finished difference. Result has 355 places, 439 transitions, 5902 flow [2024-06-27 23:04:18,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5902, PETRI_PLACES=355, PETRI_TRANSITIONS=439} [2024-06-27 23:04:18,985 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-27 23:04:18,985 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 439 transitions, 5902 flow [2024-06-27 23:04:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:18,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:18,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:04:18,986 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:18,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash -245289763, now seen corresponding path program 1 times [2024-06-27 23:04:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978888713] [2024-06-27 23:04:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:19,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:19,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978888713] [2024-06-27 23:04:19,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978888713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:19,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:19,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507377966] [2024-06-27 23:04:19,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:19,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 439 transitions, 5902 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:19,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:19,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:19,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:20,510 INFO L124 PetriNetUnfolderBase]: 4088/7033 cut-off events. [2024-06-27 23:04:20,511 INFO L125 PetriNetUnfolderBase]: For 1357355/1357366 co-relation queries the response was YES. [2024-06-27 23:04:20,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66578 conditions, 7033 events. 4088/7033 cut-off events. For 1357355/1357366 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50634 event pairs, 1162 based on Foata normal form. 14/7042 useless extension candidates. Maximal degree in co-relation 66411. Up to 2711 conditions per place. [2024-06-27 23:04:20,613 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 158 changer transitions 0/503 dead transitions. [2024-06-27 23:04:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 503 transitions, 7986 flow [2024-06-27 23:04:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:04:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:04:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 23:04:20,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-27 23:04:20,614 INFO L175 Difference]: Start difference. First operand has 355 places, 439 transitions, 5902 flow. Second operand 10 states and 258 transitions. [2024-06-27 23:04:20,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 503 transitions, 7986 flow [2024-06-27 23:04:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 503 transitions, 7467 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 23:04:26,834 INFO L231 Difference]: Finished difference. Result has 357 places, 442 transitions, 5862 flow [2024-06-27 23:04:26,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5862, PETRI_PLACES=357, PETRI_TRANSITIONS=442} [2024-06-27 23:04:26,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 23:04:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 442 transitions, 5862 flow [2024-06-27 23:04:26,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:26,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:26,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:26,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:04:26,835 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:26,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:26,835 INFO L85 PathProgramCache]: Analyzing trace with hash -961710519, now seen corresponding path program 1 times [2024-06-27 23:04:26,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:26,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610677115] [2024-06-27 23:04:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:26,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:26,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:26,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610677115] [2024-06-27 23:04:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610677115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:26,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:26,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:26,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834356874] [2024-06-27 23:04:26,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:26,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:26,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:26,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:26,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 442 transitions, 5862 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:26,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:26,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:26,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:28,431 INFO L124 PetriNetUnfolderBase]: 4293/7406 cut-off events. [2024-06-27 23:04:28,431 INFO L125 PetriNetUnfolderBase]: For 1582979/1582990 co-relation queries the response was YES. [2024-06-27 23:04:28,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71695 conditions, 7406 events. 4293/7406 cut-off events. For 1582979/1582990 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 54040 event pairs, 1152 based on Foata normal form. 32/7433 useless extension candidates. Maximal degree in co-relation 71525. Up to 6197 conditions per place. [2024-06-27 23:04:28,561 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 425 selfloop transitions, 53 changer transitions 0/485 dead transitions. [2024-06-27 23:04:28,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 485 transitions, 7282 flow [2024-06-27 23:04:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:04:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:04:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 23:04:28,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 23:04:28,563 INFO L175 Difference]: Start difference. First operand has 357 places, 442 transitions, 5862 flow. Second operand 9 states and 210 transitions. [2024-06-27 23:04:28,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 485 transitions, 7282 flow [2024-06-27 23:04:37,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 485 transitions, 6901 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 23:04:37,053 INFO L231 Difference]: Finished difference. Result has 361 places, 446 transitions, 5707 flow [2024-06-27 23:04:37,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5707, PETRI_PLACES=361, PETRI_TRANSITIONS=446} [2024-06-27 23:04:37,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 23:04:37,054 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 446 transitions, 5707 flow [2024-06-27 23:04:37,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:37,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:37,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:37,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:04:37,054 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:37,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash -961710705, now seen corresponding path program 2 times [2024-06-27 23:04:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:37,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621419363] [2024-06-27 23:04:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:37,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:37,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621419363] [2024-06-27 23:04:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621419363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:37,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:37,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:37,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587349670] [2024-06-27 23:04:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:37,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:37,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 446 transitions, 5707 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:37,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:37,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:37,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:38,691 INFO L124 PetriNetUnfolderBase]: 4026/6963 cut-off events. [2024-06-27 23:04:38,691 INFO L125 PetriNetUnfolderBase]: For 1316635/1316646 co-relation queries the response was YES. [2024-06-27 23:04:38,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62107 conditions, 6963 events. 4026/6963 cut-off events. For 1316635/1316646 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 50329 event pairs, 996 based on Foata normal form. 32/6990 useless extension candidates. Maximal degree in co-relation 61935. Up to 5871 conditions per place. [2024-06-27 23:04:38,782 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 410 selfloop transitions, 48 changer transitions 19/484 dead transitions. [2024-06-27 23:04:38,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 484 transitions, 6821 flow [2024-06-27 23:04:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:04:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:04:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:04:38,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:04:38,783 INFO L175 Difference]: Start difference. First operand has 361 places, 446 transitions, 5707 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:04:38,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 484 transitions, 6821 flow [2024-06-27 23:04:44,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 484 transitions, 6655 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 23:04:44,882 INFO L231 Difference]: Finished difference. Result has 365 places, 441 transitions, 5591 flow [2024-06-27 23:04:44,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5591, PETRI_PLACES=365, PETRI_TRANSITIONS=441} [2024-06-27 23:04:44,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 23:04:44,883 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 441 transitions, 5591 flow [2024-06-27 23:04:44,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:44,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:44,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:04:44,883 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:44,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2010442829, now seen corresponding path program 2 times [2024-06-27 23:04:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470930300] [2024-06-27 23:04:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:44,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:44,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470930300] [2024-06-27 23:04:44,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470930300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:44,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:44,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:44,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890708686] [2024-06-27 23:04:44,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:44,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:44,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:45,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:45,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 441 transitions, 5591 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:45,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:45,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:46,401 INFO L124 PetriNetUnfolderBase]: 4108/7091 cut-off events. [2024-06-27 23:04:46,402 INFO L125 PetriNetUnfolderBase]: For 1483336/1483347 co-relation queries the response was YES. [2024-06-27 23:04:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66206 conditions, 7091 events. 4108/7091 cut-off events. For 1483336/1483347 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 51251 event pairs, 1044 based on Foata normal form. 32/7118 useless extension candidates. Maximal degree in co-relation 66033. Up to 5574 conditions per place. [2024-06-27 23:04:46,509 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 428 selfloop transitions, 56 changer transitions 0/491 dead transitions. [2024-06-27 23:04:46,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 491 transitions, 7305 flow [2024-06-27 23:04:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:04:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:04:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 23:04:46,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 23:04:46,510 INFO L175 Difference]: Start difference. First operand has 365 places, 441 transitions, 5591 flow. Second operand 10 states and 232 transitions. [2024-06-27 23:04:46,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 491 transitions, 7305 flow [2024-06-27 23:04:52,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 491 transitions, 7183 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 23:04:52,905 INFO L231 Difference]: Finished difference. Result has 361 places, 446 transitions, 5658 flow [2024-06-27 23:04:52,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5658, PETRI_PLACES=361, PETRI_TRANSITIONS=446} [2024-06-27 23:04:52,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 23:04:52,905 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 446 transitions, 5658 flow [2024-06-27 23:04:52,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:52,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:04:52,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:04:52,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:04:52,906 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:04:52,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:04:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash 837328149, now seen corresponding path program 3 times [2024-06-27 23:04:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:04:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650385929] [2024-06-27 23:04:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:04:52,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:04:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:04:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:04:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:04:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650385929] [2024-06-27 23:04:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650385929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:04:53,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:04:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:04:53,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738654077] [2024-06-27 23:04:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:04:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:04:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:04:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:04:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:04:53,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:04:53,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 446 transitions, 5658 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:04:53,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:04:53,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:04:53,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:04:54,461 INFO L124 PetriNetUnfolderBase]: 4062/7027 cut-off events. [2024-06-27 23:04:54,462 INFO L125 PetriNetUnfolderBase]: For 1349366/1349377 co-relation queries the response was YES. [2024-06-27 23:04:54,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63198 conditions, 7027 events. 4062/7027 cut-off events. For 1349366/1349377 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50860 event pairs, 1004 based on Foata normal form. 32/7054 useless extension candidates. Maximal degree in co-relation 63027. Up to 5574 conditions per place. [2024-06-27 23:04:54,567 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 422 selfloop transitions, 52 changer transitions 10/491 dead transitions. [2024-06-27 23:04:54,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 491 transitions, 7306 flow [2024-06-27 23:04:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:04:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:04:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 23:04:54,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-27 23:04:54,568 INFO L175 Difference]: Start difference. First operand has 361 places, 446 transitions, 5658 flow. Second operand 10 states and 231 transitions. [2024-06-27 23:04:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 491 transitions, 7306 flow [2024-06-27 23:05:00,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 491 transitions, 7146 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 23:05:00,685 INFO L231 Difference]: Finished difference. Result has 367 places, 441 transitions, 5546 flow [2024-06-27 23:05:00,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5546, PETRI_PLACES=367, PETRI_TRANSITIONS=441} [2024-06-27 23:05:00,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 23:05:00,685 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 441 transitions, 5546 flow [2024-06-27 23:05:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:00,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:00,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:00,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:05:00,686 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:00,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash -784341849, now seen corresponding path program 3 times [2024-06-27 23:05:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586879540] [2024-06-27 23:05:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586879540] [2024-06-27 23:05:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586879540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:00,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:00,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:00,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605696776] [2024-06-27 23:05:00,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 441 transitions, 5546 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:00,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:00,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:00,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:02,188 INFO L124 PetriNetUnfolderBase]: 4015/6934 cut-off events. [2024-06-27 23:05:02,189 INFO L125 PetriNetUnfolderBase]: For 1345047/1345058 co-relation queries the response was YES. [2024-06-27 23:05:02,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63825 conditions, 6934 events. 4015/6934 cut-off events. For 1345047/1345058 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49978 event pairs, 956 based on Foata normal form. 14/6943 useless extension candidates. Maximal degree in co-relation 63653. Up to 5574 conditions per place. [2024-06-27 23:05:02,297 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 417 selfloop transitions, 50 changer transitions 8/482 dead transitions. [2024-06-27 23:05:02,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 482 transitions, 7152 flow [2024-06-27 23:05:02,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:05:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:05:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:05:02,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:05:02,297 INFO L175 Difference]: Start difference. First operand has 367 places, 441 transitions, 5546 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:05:02,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 482 transitions, 7152 flow [2024-06-27 23:05:08,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 482 transitions, 7001 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 23:05:08,392 INFO L231 Difference]: Finished difference. Result has 365 places, 439 transitions, 5563 flow [2024-06-27 23:05:08,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5563, PETRI_PLACES=365, PETRI_TRANSITIONS=439} [2024-06-27 23:05:08,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-27 23:05:08,393 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 439 transitions, 5563 flow [2024-06-27 23:05:08,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:08,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:08,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:05:08,393 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:08,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash -445756029, now seen corresponding path program 4 times [2024-06-27 23:05:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:08,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942901615] [2024-06-27 23:05:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:08,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:08,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942901615] [2024-06-27 23:05:08,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942901615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:08,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:08,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:08,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633301953] [2024-06-27 23:05:08,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:08,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:08,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:08,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:08,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:08,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:08,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 439 transitions, 5563 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:08,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:08,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:10,119 INFO L124 PetriNetUnfolderBase]: 3993/6860 cut-off events. [2024-06-27 23:05:10,120 INFO L125 PetriNetUnfolderBase]: For 1408425/1408436 co-relation queries the response was YES. [2024-06-27 23:05:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65222 conditions, 6860 events. 3993/6860 cut-off events. For 1408425/1408436 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49235 event pairs, 1436 based on Foata normal form. 16/6863 useless extension candidates. Maximal degree in co-relation 65049. Up to 5801 conditions per place. [2024-06-27 23:05:10,367 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 155 changer transitions 0/486 dead transitions. [2024-06-27 23:05:10,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 486 transitions, 7007 flow [2024-06-27 23:05:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:05:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:05:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-27 23:05:10,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-27 23:05:10,368 INFO L175 Difference]: Start difference. First operand has 365 places, 439 transitions, 5563 flow. Second operand 11 states and 262 transitions. [2024-06-27 23:05:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 486 transitions, 7007 flow [2024-06-27 23:05:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 486 transitions, 6859 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 23:05:15,755 INFO L231 Difference]: Finished difference. Result has 361 places, 441 transitions, 5849 flow [2024-06-27 23:05:15,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5849, PETRI_PLACES=361, PETRI_TRANSITIONS=441} [2024-06-27 23:05:15,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 23:05:15,756 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 441 transitions, 5849 flow [2024-06-27 23:05:15,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:15,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:15,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:15,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:05:15,757 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:15,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash -437185149, now seen corresponding path program 5 times [2024-06-27 23:05:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046611759] [2024-06-27 23:05:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:15,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:15,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:15,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046611759] [2024-06-27 23:05:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046611759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:15,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:15,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188069556] [2024-06-27 23:05:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:15,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:15,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:15,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:15,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 441 transitions, 5849 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:15,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:15,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:15,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:17,535 INFO L124 PetriNetUnfolderBase]: 3975/6836 cut-off events. [2024-06-27 23:05:17,535 INFO L125 PetriNetUnfolderBase]: For 1312886/1312897 co-relation queries the response was YES. [2024-06-27 23:05:17,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63574 conditions, 6836 events. 3975/6836 cut-off events. For 1312886/1312897 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49094 event pairs, 1466 based on Foata normal form. 16/6847 useless extension candidates. Maximal degree in co-relation 63404. Up to 5969 conditions per place. [2024-06-27 23:05:17,631 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 318 selfloop transitions, 153 changer transitions 0/478 dead transitions. [2024-06-27 23:05:17,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 478 transitions, 6915 flow [2024-06-27 23:05:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:05:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:05:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-27 23:05:17,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-27 23:05:17,632 INFO L175 Difference]: Start difference. First operand has 361 places, 441 transitions, 5849 flow. Second operand 11 states and 255 transitions. [2024-06-27 23:05:17,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 478 transitions, 6915 flow [2024-06-27 23:05:23,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 478 transitions, 6622 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 23:05:23,758 INFO L231 Difference]: Finished difference. Result has 364 places, 441 transitions, 5867 flow [2024-06-27 23:05:23,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5867, PETRI_PLACES=364, PETRI_TRANSITIONS=441} [2024-06-27 23:05:23,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 23:05:23,758 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 441 transitions, 5867 flow [2024-06-27 23:05:23,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:23,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:23,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:23,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:05:23,759 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:23,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:23,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1749481235, now seen corresponding path program 6 times [2024-06-27 23:05:23,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:23,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949425173] [2024-06-27 23:05:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:23,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949425173] [2024-06-27 23:05:23,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949425173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:23,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:23,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:23,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256019343] [2024-06-27 23:05:23,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:23,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:23,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 441 transitions, 5867 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:23,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:23,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:23,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:25,693 INFO L124 PetriNetUnfolderBase]: 4350/7463 cut-off events. [2024-06-27 23:05:25,694 INFO L125 PetriNetUnfolderBase]: For 1676427/1676438 co-relation queries the response was YES. [2024-06-27 23:05:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74112 conditions, 7463 events. 4350/7463 cut-off events. For 1676427/1676438 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 54342 event pairs, 1516 based on Foata normal form. 14/7472 useless extension candidates. Maximal degree in co-relation 73941. Up to 5095 conditions per place. [2024-06-27 23:05:25,795 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 155 changer transitions 0/500 dead transitions. [2024-06-27 23:05:25,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 500 transitions, 7611 flow [2024-06-27 23:05:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:05:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:05:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-27 23:05:25,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-27 23:05:25,796 INFO L175 Difference]: Start difference. First operand has 364 places, 441 transitions, 5867 flow. Second operand 11 states and 274 transitions. [2024-06-27 23:05:25,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 500 transitions, 7611 flow [2024-06-27 23:05:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 500 transitions, 7295 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 23:05:33,628 INFO L231 Difference]: Finished difference. Result has 367 places, 444 transitions, 6028 flow [2024-06-27 23:05:33,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6028, PETRI_PLACES=367, PETRI_TRANSITIONS=444} [2024-06-27 23:05:33,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 23:05:33,629 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 444 transitions, 6028 flow [2024-06-27 23:05:33,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:33,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:33,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:33,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:05:33,629 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:33,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1749361265, now seen corresponding path program 7 times [2024-06-27 23:05:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217029996] [2024-06-27 23:05:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217029996] [2024-06-27 23:05:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217029996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:33,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:33,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066754350] [2024-06-27 23:05:33,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:33,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:33,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:33,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 444 transitions, 6028 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:33,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:33,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:33,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:35,657 INFO L124 PetriNetUnfolderBase]: 4319/7455 cut-off events. [2024-06-27 23:05:35,657 INFO L125 PetriNetUnfolderBase]: For 1666513/1666524 co-relation queries the response was YES. [2024-06-27 23:05:35,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72112 conditions, 7455 events. 4319/7455 cut-off events. For 1666513/1666524 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54663 event pairs, 1578 based on Foata normal form. 32/7475 useless extension candidates. Maximal degree in co-relation 71938. Up to 6394 conditions per place. [2024-06-27 23:05:35,764 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 432 selfloop transitions, 43 changer transitions 0/482 dead transitions. [2024-06-27 23:05:35,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 482 transitions, 7336 flow [2024-06-27 23:05:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:05:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:05:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:05:35,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:05:35,765 INFO L175 Difference]: Start difference. First operand has 367 places, 444 transitions, 6028 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:05:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 482 transitions, 7336 flow [2024-06-27 23:05:42,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 482 transitions, 6991 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 23:05:42,364 INFO L231 Difference]: Finished difference. Result has 369 places, 444 transitions, 5774 flow [2024-06-27 23:05:42,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5774, PETRI_PLACES=369, PETRI_TRANSITIONS=444} [2024-06-27 23:05:42,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-27 23:05:42,364 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 444 transitions, 5774 flow [2024-06-27 23:05:42,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:42,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:42,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:42,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:05:42,365 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:42,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:42,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1749361079, now seen corresponding path program 4 times [2024-06-27 23:05:42,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:42,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913634301] [2024-06-27 23:05:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:42,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913634301] [2024-06-27 23:05:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913634301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:42,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:42,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187822757] [2024-06-27 23:05:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:42,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:42,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 444 transitions, 5774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:42,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:42,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:42,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:44,362 INFO L124 PetriNetUnfolderBase]: 4258/7352 cut-off events. [2024-06-27 23:05:44,362 INFO L125 PetriNetUnfolderBase]: For 1592311/1592322 co-relation queries the response was YES. [2024-06-27 23:05:44,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68912 conditions, 7352 events. 4258/7352 cut-off events. For 1592311/1592322 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 53910 event pairs, 1562 based on Foata normal form. 32/7370 useless extension candidates. Maximal degree in co-relation 68737. Up to 6394 conditions per place. [2024-06-27 23:05:44,465 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 417 selfloop transitions, 38 changer transitions 19/481 dead transitions. [2024-06-27 23:05:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 481 transitions, 6880 flow [2024-06-27 23:05:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:05:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:05:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 23:05:44,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 23:05:44,466 INFO L175 Difference]: Start difference. First operand has 369 places, 444 transitions, 5774 flow. Second operand 9 states and 208 transitions. [2024-06-27 23:05:44,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 481 transitions, 6880 flow [2024-06-27 23:05:52,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 481 transitions, 6747 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 23:05:52,690 INFO L231 Difference]: Finished difference. Result has 371 places, 439 transitions, 5663 flow [2024-06-27 23:05:52,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5641, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5663, PETRI_PLACES=371, PETRI_TRANSITIONS=439} [2024-06-27 23:05:52,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 23:05:52,691 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 439 transitions, 5663 flow [2024-06-27 23:05:52,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:52,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:05:52,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:05:52,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:05:52,691 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:05:52,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:05:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash -647385817, now seen corresponding path program 5 times [2024-06-27 23:05:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:05:52,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752695440] [2024-06-27 23:05:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:05:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:05:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:05:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:05:52,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:05:52,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752695440] [2024-06-27 23:05:52,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752695440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:05:52,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:05:52,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:05:52,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443672998] [2024-06-27 23:05:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:05:52,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:05:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:05:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:05:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:05:52,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:05:52,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 439 transitions, 5663 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:05:52,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:05:52,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:05:52,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:05:54,630 INFO L124 PetriNetUnfolderBase]: 4517/7800 cut-off events. [2024-06-27 23:05:54,630 INFO L125 PetriNetUnfolderBase]: For 1820727/1820738 co-relation queries the response was YES. [2024-06-27 23:05:54,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74655 conditions, 7800 events. 4517/7800 cut-off events. For 1820727/1820738 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57756 event pairs, 1752 based on Foata normal form. 38/7833 useless extension candidates. Maximal degree in co-relation 74479. Up to 6397 conditions per place. [2024-06-27 23:05:54,858 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 419 selfloop transitions, 39 changer transitions 15/480 dead transitions. [2024-06-27 23:05:54,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 480 transitions, 7066 flow [2024-06-27 23:05:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:05:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:05:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:05:54,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:05:54,865 INFO L175 Difference]: Start difference. First operand has 371 places, 439 transitions, 5663 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:05:54,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 480 transitions, 7066 flow [2024-06-27 23:06:03,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 480 transitions, 6929 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 23:06:03,341 INFO L231 Difference]: Finished difference. Result has 366 places, 436 transitions, 5586 flow [2024-06-27 23:06:03,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5542, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5586, PETRI_PLACES=366, PETRI_TRANSITIONS=436} [2024-06-27 23:06:03,341 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 23:06:03,341 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 436 transitions, 5586 flow [2024-06-27 23:06:03,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:03,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:03,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:03,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:06:03,341 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:03,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1483337369, now seen corresponding path program 6 times [2024-06-27 23:06:03,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:03,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624585635] [2024-06-27 23:06:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624585635] [2024-06-27 23:06:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624585635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:03,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:03,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962823457] [2024-06-27 23:06:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:03,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 436 transitions, 5586 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:03,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:03,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:05,156 INFO L124 PetriNetUnfolderBase]: 4149/7138 cut-off events. [2024-06-27 23:06:05,157 INFO L125 PetriNetUnfolderBase]: For 1524105/1524116 co-relation queries the response was YES. [2024-06-27 23:06:05,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65203 conditions, 7138 events. 4149/7138 cut-off events. For 1524105/1524116 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 51794 event pairs, 1548 based on Foata normal form. 42/7173 useless extension candidates. Maximal degree in co-relation 65029. Up to 6324 conditions per place. [2024-06-27 23:06:05,253 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 33 changer transitions 18/465 dead transitions. [2024-06-27 23:06:05,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 465 transitions, 6634 flow [2024-06-27 23:06:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:06:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:06:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 23:06:05,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 23:06:05,254 INFO L175 Difference]: Start difference. First operand has 366 places, 436 transitions, 5586 flow. Second operand 9 states and 199 transitions. [2024-06-27 23:06:05,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 465 transitions, 6634 flow [2024-06-27 23:06:12,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 465 transitions, 6544 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:06:12,938 INFO L231 Difference]: Finished difference. Result has 366 places, 429 transitions, 5477 flow [2024-06-27 23:06:12,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5477, PETRI_PLACES=366, PETRI_TRANSITIONS=429} [2024-06-27 23:06:12,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 23:06:12,938 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 429 transitions, 5477 flow [2024-06-27 23:06:12,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:12,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:12,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:12,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:06:12,939 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:12,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1464229957, now seen corresponding path program 7 times [2024-06-27 23:06:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:12,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997441402] [2024-06-27 23:06:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:12,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:13,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997441402] [2024-06-27 23:06:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997441402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:13,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:13,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735253968] [2024-06-27 23:06:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:13,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:13,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:13,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 429 transitions, 5477 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:13,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:13,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:13,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:14,620 INFO L124 PetriNetUnfolderBase]: 3991/6846 cut-off events. [2024-06-27 23:06:14,621 INFO L125 PetriNetUnfolderBase]: For 1392741/1392752 co-relation queries the response was YES. [2024-06-27 23:06:14,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63732 conditions, 6846 events. 3991/6846 cut-off events. For 1392741/1392752 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49082 event pairs, 1460 based on Foata normal form. 16/6855 useless extension candidates. Maximal degree in co-relation 63559. Up to 6177 conditions per place. [2024-06-27 23:06:14,714 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 388 selfloop transitions, 48 changer transitions 10/453 dead transitions. [2024-06-27 23:06:14,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 453 transitions, 6469 flow [2024-06-27 23:06:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:06:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:06:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 23:06:14,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 23:06:14,715 INFO L175 Difference]: Start difference. First operand has 366 places, 429 transitions, 5477 flow. Second operand 9 states and 199 transitions. [2024-06-27 23:06:14,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 453 transitions, 6469 flow [2024-06-27 23:06:22,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 453 transitions, 6385 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 23:06:22,493 INFO L231 Difference]: Finished difference. Result has 360 places, 426 transitions, 5445 flow [2024-06-27 23:06:22,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=360, PETRI_TRANSITIONS=426} [2024-06-27 23:06:22,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 23:06:22,493 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 426 transitions, 5445 flow [2024-06-27 23:06:22,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:22,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:22,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:22,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:06:22,494 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:22,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:22,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1461372997, now seen corresponding path program 8 times [2024-06-27 23:06:22,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:22,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681744153] [2024-06-27 23:06:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:22,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:22,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681744153] [2024-06-27 23:06:22,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681744153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:22,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:22,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:22,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280985608] [2024-06-27 23:06:22,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:22,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:22,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:22,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 426 transitions, 5445 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:22,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:22,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:22,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:24,260 INFO L124 PetriNetUnfolderBase]: 4319/7368 cut-off events. [2024-06-27 23:06:24,260 INFO L125 PetriNetUnfolderBase]: For 1726273/1726284 co-relation queries the response was YES. [2024-06-27 23:06:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73095 conditions, 7368 events. 4319/7368 cut-off events. For 1726273/1726284 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 53200 event pairs, 1615 based on Foata normal form. 16/7374 useless extension candidates. Maximal degree in co-relation 72924. Up to 6138 conditions per place. [2024-06-27 23:06:24,366 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 395 selfloop transitions, 47 changer transitions 10/459 dead transitions. [2024-06-27 23:06:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 459 transitions, 6759 flow [2024-06-27 23:06:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:06:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:06:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 23:06:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-27 23:06:24,367 INFO L175 Difference]: Start difference. First operand has 360 places, 426 transitions, 5445 flow. Second operand 9 states and 205 transitions. [2024-06-27 23:06:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 459 transitions, 6759 flow [2024-06-27 23:06:31,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 459 transitions, 6641 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 23:06:31,532 INFO L231 Difference]: Finished difference. Result has 359 places, 424 transitions, 5405 flow [2024-06-27 23:06:31,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5405, PETRI_PLACES=359, PETRI_TRANSITIONS=424} [2024-06-27 23:06:31,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 23:06:31,533 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 424 transitions, 5405 flow [2024-06-27 23:06:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:31,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:31,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:31,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:06:31,533 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:31,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:31,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1147436617, now seen corresponding path program 9 times [2024-06-27 23:06:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:31,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112599010] [2024-06-27 23:06:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:31,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112599010] [2024-06-27 23:06:31,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112599010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:31,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:31,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:31,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572758658] [2024-06-27 23:06:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:31,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:31,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:31,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 424 transitions, 5405 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:31,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:31,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:33,556 INFO L124 PetriNetUnfolderBase]: 4743/8190 cut-off events. [2024-06-27 23:06:33,556 INFO L125 PetriNetUnfolderBase]: For 1990125/1990136 co-relation queries the response was YES. [2024-06-27 23:06:33,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80352 conditions, 8190 events. 4743/8190 cut-off events. For 1990125/1990136 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 60935 event pairs, 1856 based on Foata normal form. 32/8217 useless extension candidates. Maximal degree in co-relation 80180. Up to 5672 conditions per place. [2024-06-27 23:06:33,674 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 413 selfloop transitions, 43 changer transitions 11/474 dead transitions. [2024-06-27 23:06:33,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 474 transitions, 7150 flow [2024-06-27 23:06:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:06:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:06:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 23:06:33,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 23:06:33,674 INFO L175 Difference]: Start difference. First operand has 359 places, 424 transitions, 5405 flow. Second operand 9 states and 212 transitions. [2024-06-27 23:06:33,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 474 transitions, 7150 flow [2024-06-27 23:06:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 474 transitions, 7018 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 23:06:42,871 INFO L231 Difference]: Finished difference. Result has 357 places, 423 transitions, 5366 flow [2024-06-27 23:06:42,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5285, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5366, PETRI_PLACES=357, PETRI_TRANSITIONS=423} [2024-06-27 23:06:42,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 23:06:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 423 transitions, 5366 flow [2024-06-27 23:06:42,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:42,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:06:42,872 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:42,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2041037765, now seen corresponding path program 10 times [2024-06-27 23:06:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153353497] [2024-06-27 23:06:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:42,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:42,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153353497] [2024-06-27 23:06:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153353497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:42,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:42,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599749580] [2024-06-27 23:06:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:42,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:43,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:43,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 423 transitions, 5366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:43,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:43,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:43,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:44,849 INFO L124 PetriNetUnfolderBase]: 4729/8164 cut-off events. [2024-06-27 23:06:44,850 INFO L125 PetriNetUnfolderBase]: For 1936701/1936712 co-relation queries the response was YES. [2024-06-27 23:06:44,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81315 conditions, 8164 events. 4729/8164 cut-off events. For 1936701/1936712 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 60812 event pairs, 1742 based on Foata normal form. 14/8173 useless extension candidates. Maximal degree in co-relation 81144. Up to 5672 conditions per place. [2024-06-27 23:06:44,964 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 405 selfloop transitions, 48 changer transitions 8/468 dead transitions. [2024-06-27 23:06:44,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 468 transitions, 7045 flow [2024-06-27 23:06:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:06:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:06:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 23:06:44,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 23:06:44,965 INFO L175 Difference]: Start difference. First operand has 357 places, 423 transitions, 5366 flow. Second operand 9 states and 210 transitions. [2024-06-27 23:06:44,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 468 transitions, 7045 flow [2024-06-27 23:06:52,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 468 transitions, 6945 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 23:06:52,692 INFO L231 Difference]: Finished difference. Result has 359 places, 427 transitions, 5505 flow [2024-06-27 23:06:52,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=359, PETRI_TRANSITIONS=427} [2024-06-27 23:06:52,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 23:06:52,692 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 427 transitions, 5505 flow [2024-06-27 23:06:52,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:52,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:06:52,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:06:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:06:52,693 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:06:52,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:06:52,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2042683865, now seen corresponding path program 11 times [2024-06-27 23:06:52,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:06:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269372752] [2024-06-27 23:06:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:06:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:06:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:06:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:06:52,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:06:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269372752] [2024-06-27 23:06:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269372752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:06:52,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:06:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:06:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783836046] [2024-06-27 23:06:52,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:06:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:06:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:06:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:06:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:06:52,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:06:52,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 427 transitions, 5505 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:06:52,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:06:52,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:06:52,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:06:54,541 INFO L124 PetriNetUnfolderBase]: 4559/7860 cut-off events. [2024-06-27 23:06:54,541 INFO L125 PetriNetUnfolderBase]: For 1907826/1907837 co-relation queries the response was YES. [2024-06-27 23:06:54,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76846 conditions, 7860 events. 4559/7860 cut-off events. For 1907826/1907837 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 58031 event pairs, 1858 based on Foata normal form. 42/7897 useless extension candidates. Maximal degree in co-relation 76674. Up to 6989 conditions per place. [2024-06-27 23:06:54,814 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 394 selfloop transitions, 38 changer transitions 14/453 dead transitions. [2024-06-27 23:06:54,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 453 transitions, 6507 flow [2024-06-27 23:06:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:06:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:06:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 23:06:54,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-27 23:06:54,814 INFO L175 Difference]: Start difference. First operand has 359 places, 427 transitions, 5505 flow. Second operand 10 states and 219 transitions. [2024-06-27 23:06:54,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 453 transitions, 6507 flow [2024-06-27 23:07:03,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 453 transitions, 6402 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:07:03,182 INFO L231 Difference]: Finished difference. Result has 358 places, 421 transitions, 5381 flow [2024-06-27 23:07:03,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5381, PETRI_PLACES=358, PETRI_TRANSITIONS=421} [2024-06-27 23:07:03,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-27 23:07:03,182 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 421 transitions, 5381 flow [2024-06-27 23:07:03,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:03,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:03,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:03,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:07:03,182 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:03,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1236002377, now seen corresponding path program 12 times [2024-06-27 23:07:03,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:03,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256457746] [2024-06-27 23:07:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:03,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256457746] [2024-06-27 23:07:03,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256457746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:03,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:03,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171927543] [2024-06-27 23:07:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:03,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:03,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 421 transitions, 5381 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:03,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:03,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:03,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:05,015 INFO L124 PetriNetUnfolderBase]: 4349/7510 cut-off events. [2024-06-27 23:07:05,015 INFO L125 PetriNetUnfolderBase]: For 1736894/1736905 co-relation queries the response was YES. [2024-06-27 23:07:05,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71753 conditions, 7510 events. 4349/7510 cut-off events. For 1736894/1736905 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 55087 event pairs, 1670 based on Foata normal form. 38/7543 useless extension candidates. Maximal degree in co-relation 71582. Up to 6493 conditions per place. [2024-06-27 23:07:05,117 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 388 selfloop transitions, 32 changer transitions 27/454 dead transitions. [2024-06-27 23:07:05,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 454 transitions, 6457 flow [2024-06-27 23:07:05,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:07:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:07:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-27 23:07:05,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-27 23:07:05,118 INFO L175 Difference]: Start difference. First operand has 358 places, 421 transitions, 5381 flow. Second operand 10 states and 222 transitions. [2024-06-27 23:07:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 454 transitions, 6457 flow [2024-06-27 23:07:14,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 454 transitions, 6333 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 23:07:14,617 INFO L231 Difference]: Finished difference. Result has 354 places, 411 transitions, 5184 flow [2024-06-27 23:07:14,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5184, PETRI_PLACES=354, PETRI_TRANSITIONS=411} [2024-06-27 23:07:14,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 23:07:14,618 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 411 transitions, 5184 flow [2024-06-27 23:07:14,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:14,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:14,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:07:14,618 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1188599337, now seen corresponding path program 8 times [2024-06-27 23:07:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943359799] [2024-06-27 23:07:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:14,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:14,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943359799] [2024-06-27 23:07:14,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943359799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:14,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:14,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203979007] [2024-06-27 23:07:14,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:14,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:14,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:14,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 411 transitions, 5184 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:14,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:14,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:14,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:16,476 INFO L124 PetriNetUnfolderBase]: 4369/7503 cut-off events. [2024-06-27 23:07:16,476 INFO L125 PetriNetUnfolderBase]: For 1828117/1828126 co-relation queries the response was YES. [2024-06-27 23:07:16,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76591 conditions, 7503 events. 4369/7503 cut-off events. For 1828117/1828126 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 54686 event pairs, 1752 based on Foata normal form. 15/7510 useless extension candidates. Maximal degree in co-relation 76423. Up to 6243 conditions per place. [2024-06-27 23:07:16,580 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 333 selfloop transitions, 112 changer transitions 0/452 dead transitions. [2024-06-27 23:07:16,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 6616 flow [2024-06-27 23:07:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 23:07:16,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-27 23:07:16,581 INFO L175 Difference]: Start difference. First operand has 354 places, 411 transitions, 5184 flow. Second operand 8 states and 202 transitions. [2024-06-27 23:07:16,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 6616 flow [2024-06-27 23:07:22,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 452 transitions, 6508 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 23:07:22,925 INFO L231 Difference]: Finished difference. Result has 348 places, 414 transitions, 5493 flow [2024-06-27 23:07:22,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5080, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=348, PETRI_TRANSITIONS=414} [2024-06-27 23:07:22,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-27 23:07:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 414 transitions, 5493 flow [2024-06-27 23:07:22,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:22,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:22,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:07:22,926 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:22,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1197170217, now seen corresponding path program 9 times [2024-06-27 23:07:22,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:22,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443434067] [2024-06-27 23:07:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443434067] [2024-06-27 23:07:23,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443434067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:23,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:23,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:23,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424164889] [2024-06-27 23:07:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:23,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:23,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 414 transitions, 5493 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:23,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:23,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:23,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:24,753 INFO L124 PetriNetUnfolderBase]: 4351/7478 cut-off events. [2024-06-27 23:07:24,754 INFO L125 PetriNetUnfolderBase]: For 1787854/1787863 co-relation queries the response was YES. [2024-06-27 23:07:24,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75742 conditions, 7478 events. 4351/7478 cut-off events. For 1787854/1787863 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 54566 event pairs, 1769 based on Foata normal form. 15/7488 useless extension candidates. Maximal degree in co-relation 75574. Up to 6664 conditions per place. [2024-06-27 23:07:24,859 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 326 selfloop transitions, 109 changer transitions 0/442 dead transitions. [2024-06-27 23:07:24,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 442 transitions, 6465 flow [2024-06-27 23:07:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:07:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:07:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:07:24,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 23:07:24,860 INFO L175 Difference]: Start difference. First operand has 348 places, 414 transitions, 5493 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:07:24,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 442 transitions, 6465 flow [2024-06-27 23:07:30,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 442 transitions, 6274 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:07:30,888 INFO L231 Difference]: Finished difference. Result has 352 places, 414 transitions, 5525 flow [2024-06-27 23:07:30,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5525, PETRI_PLACES=352, PETRI_TRANSITIONS=414} [2024-06-27 23:07:30,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 23:07:30,888 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 414 transitions, 5525 flow [2024-06-27 23:07:30,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:30,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:30,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:07:30,889 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:30,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2046879221, now seen corresponding path program 10 times [2024-06-27 23:07:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:30,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114900294] [2024-06-27 23:07:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:31,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114900294] [2024-06-27 23:07:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114900294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:31,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:31,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:31,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788705886] [2024-06-27 23:07:31,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:31,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:31,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:31,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 414 transitions, 5525 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:31,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:31,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:31,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:32,729 INFO L124 PetriNetUnfolderBase]: 4425/7592 cut-off events. [2024-06-27 23:07:32,729 INFO L125 PetriNetUnfolderBase]: For 1868087/1868096 co-relation queries the response was YES. [2024-06-27 23:07:32,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78217 conditions, 7592 events. 4425/7592 cut-off events. For 1868087/1868096 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55449 event pairs, 1781 based on Foata normal form. 15/7602 useless extension candidates. Maximal degree in co-relation 78047. Up to 6588 conditions per place. [2024-06-27 23:07:32,835 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 120 changer transitions 0/457 dead transitions. [2024-06-27 23:07:32,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 457 transitions, 6911 flow [2024-06-27 23:07:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:07:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:07:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 23:07:32,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-27 23:07:32,835 INFO L175 Difference]: Start difference. First operand has 352 places, 414 transitions, 5525 flow. Second operand 10 states and 241 transitions. [2024-06-27 23:07:32,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 457 transitions, 6911 flow [2024-06-27 23:07:40,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 457 transitions, 6658 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:07:40,871 INFO L231 Difference]: Finished difference. Result has 356 places, 416 transitions, 5638 flow [2024-06-27 23:07:40,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5638, PETRI_PLACES=356, PETRI_TRANSITIONS=416} [2024-06-27 23:07:40,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 23:07:40,872 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 416 transitions, 5638 flow [2024-06-27 23:07:40,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:40,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:40,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:40,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:07:40,872 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:40,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:40,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2047118231, now seen corresponding path program 11 times [2024-06-27 23:07:40,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:40,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784032244] [2024-06-27 23:07:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:40,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:41,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:41,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784032244] [2024-06-27 23:07:41,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784032244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:41,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:41,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993772166] [2024-06-27 23:07:41,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:41,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:41,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 416 transitions, 5638 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:41,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:41,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:42,847 INFO L124 PetriNetUnfolderBase]: 4453/7636 cut-off events. [2024-06-27 23:07:42,847 INFO L125 PetriNetUnfolderBase]: For 1907568/1907577 co-relation queries the response was YES. [2024-06-27 23:07:42,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79020 conditions, 7636 events. 4453/7636 cut-off events. For 1907568/1907577 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 55746 event pairs, 1801 based on Foata normal form. 15/7646 useless extension candidates. Maximal degree in co-relation 78849. Up to 6822 conditions per place. [2024-06-27 23:07:42,952 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 325 selfloop transitions, 118 changer transitions 0/450 dead transitions. [2024-06-27 23:07:42,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 450 transitions, 6700 flow [2024-06-27 23:07:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:07:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:07:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-27 23:07:42,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 23:07:42,953 INFO L175 Difference]: Start difference. First operand has 356 places, 416 transitions, 5638 flow. Second operand 10 states and 234 transitions. [2024-06-27 23:07:42,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 450 transitions, 6700 flow [2024-06-27 23:07:50,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 450 transitions, 6473 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 23:07:50,751 INFO L231 Difference]: Finished difference. Result has 360 places, 417 transitions, 5716 flow [2024-06-27 23:07:50,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5716, PETRI_PLACES=360, PETRI_TRANSITIONS=417} [2024-06-27 23:07:50,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 23:07:50,752 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 417 transitions, 5716 flow [2024-06-27 23:07:50,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:50,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:07:50,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:07:50,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:07:50,752 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:07:50,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:07:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1952629865, now seen corresponding path program 12 times [2024-06-27 23:07:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:07:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199755797] [2024-06-27 23:07:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:07:50,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:07:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:07:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:07:50,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:07:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199755797] [2024-06-27 23:07:50,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199755797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:07:50,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:07:50,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:07:50,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718498614] [2024-06-27 23:07:50,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:07:50,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:07:50,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:07:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:07:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:07:50,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:07:50,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 417 transitions, 5716 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:07:50,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:07:50,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:07:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:07:52,653 INFO L124 PetriNetUnfolderBase]: 4435/7610 cut-off events. [2024-06-27 23:07:52,653 INFO L125 PetriNetUnfolderBase]: For 1891215/1891224 co-relation queries the response was YES. [2024-06-27 23:07:52,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77883 conditions, 7610 events. 4435/7610 cut-off events. For 1891215/1891224 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55618 event pairs, 1795 based on Foata normal form. 15/7620 useless extension candidates. Maximal degree in co-relation 77710. Up to 6796 conditions per place. [2024-06-27 23:07:52,764 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 320 selfloop transitions, 121 changer transitions 0/448 dead transitions. [2024-06-27 23:07:52,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 448 transitions, 6706 flow [2024-06-27 23:07:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:07:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:07:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-27 23:07:52,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-27 23:07:52,766 INFO L175 Difference]: Start difference. First operand has 360 places, 417 transitions, 5716 flow. Second operand 11 states and 249 transitions. [2024-06-27 23:07:52,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 448 transitions, 6706 flow [2024-06-27 23:08:01,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 448 transitions, 6403 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:08:01,364 INFO L231 Difference]: Finished difference. Result has 363 places, 417 transitions, 5660 flow [2024-06-27 23:08:01,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5413, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5660, PETRI_PLACES=363, PETRI_TRANSITIONS=417} [2024-06-27 23:08:01,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 23:08:01,365 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 417 transitions, 5660 flow [2024-06-27 23:08:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:01,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:08:01,365 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:01,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1046496267, now seen corresponding path program 13 times [2024-06-27 23:08:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288038102] [2024-06-27 23:08:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:01,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:01,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288038102] [2024-06-27 23:08:01,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288038102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:01,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:01,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891536284] [2024-06-27 23:08:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:01,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:01,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:01,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:01,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 417 transitions, 5660 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:01,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:01,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:01,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:03,372 INFO L124 PetriNetUnfolderBase]: 4582/7861 cut-off events. [2024-06-27 23:08:03,373 INFO L125 PetriNetUnfolderBase]: For 2058586/2058595 co-relation queries the response was YES. [2024-06-27 23:08:03,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81862 conditions, 7861 events. 4582/7861 cut-off events. For 2058586/2058595 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 57746 event pairs, 1444 based on Foata normal form. 13/7869 useless extension candidates. Maximal degree in co-relation 81688. Up to 4084 conditions per place. [2024-06-27 23:08:03,500 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 339 selfloop transitions, 116 changer transitions 0/462 dead transitions. [2024-06-27 23:08:03,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 462 transitions, 7266 flow [2024-06-27 23:08:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 23:08:03,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-27 23:08:03,501 INFO L175 Difference]: Start difference. First operand has 363 places, 417 transitions, 5660 flow. Second operand 8 states and 207 transitions. [2024-06-27 23:08:03,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 462 transitions, 7266 flow [2024-06-27 23:08:13,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 462 transitions, 7011 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 23:08:13,873 INFO L231 Difference]: Finished difference. Result has 361 places, 418 transitions, 5705 flow [2024-06-27 23:08:13,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=361, PETRI_TRANSITIONS=418} [2024-06-27 23:08:13,873 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 23:08:13,873 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 418 transitions, 5705 flow [2024-06-27 23:08:13,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:13,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:13,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:08:13,874 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:13,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1046616423, now seen corresponding path program 13 times [2024-06-27 23:08:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:13,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423364627] [2024-06-27 23:08:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:13,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:13,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423364627] [2024-06-27 23:08:13,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423364627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:13,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:13,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781675410] [2024-06-27 23:08:13,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:13,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:13,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:14,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:14,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 418 transitions, 5705 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:14,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:14,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:14,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:15,950 INFO L124 PetriNetUnfolderBase]: 4551/7834 cut-off events. [2024-06-27 23:08:15,951 INFO L125 PetriNetUnfolderBase]: For 2054525/2054534 co-relation queries the response was YES. [2024-06-27 23:08:16,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79780 conditions, 7834 events. 4551/7834 cut-off events. For 2054525/2054534 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 57702 event pairs, 1426 based on Foata normal form. 31/7860 useless extension candidates. Maximal degree in co-relation 79605. Up to 6757 conditions per place. [2024-06-27 23:08:16,216 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 410 selfloop transitions, 35 changer transitions 0/452 dead transitions. [2024-06-27 23:08:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 452 transitions, 6953 flow [2024-06-27 23:08:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 23:08:16,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 23:08:16,216 INFO L175 Difference]: Start difference. First operand has 361 places, 418 transitions, 5705 flow. Second operand 8 states and 188 transitions. [2024-06-27 23:08:16,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 452 transitions, 6953 flow [2024-06-27 23:08:24,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 452 transitions, 6653 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:08:24,714 INFO L231 Difference]: Finished difference. Result has 363 places, 418 transitions, 5480 flow [2024-06-27 23:08:24,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5480, PETRI_PLACES=363, PETRI_TRANSITIONS=418} [2024-06-27 23:08:24,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 23:08:24,714 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 418 transitions, 5480 flow [2024-06-27 23:08:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:24,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:24,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:24,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:08:24,715 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:24,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1356162637, now seen corresponding path program 14 times [2024-06-27 23:08:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040974615] [2024-06-27 23:08:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:24,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:24,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040974615] [2024-06-27 23:08:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040974615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:24,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:24,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473521046] [2024-06-27 23:08:24,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:24,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:24,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:24,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 418 transitions, 5480 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:24,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:24,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:24,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:26,696 INFO L124 PetriNetUnfolderBase]: 4363/7504 cut-off events. [2024-06-27 23:08:26,696 INFO L125 PetriNetUnfolderBase]: For 1827215/1827224 co-relation queries the response was YES. [2024-06-27 23:08:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72553 conditions, 7504 events. 4363/7504 cut-off events. For 1827215/1827224 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 54832 event pairs, 1348 based on Foata normal form. 31/7530 useless extension candidates. Maximal degree in co-relation 72378. Up to 6552 conditions per place. [2024-06-27 23:08:26,802 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 395 selfloop transitions, 30 changer transitions 19/451 dead transitions. [2024-06-27 23:08:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 451 transitions, 6516 flow [2024-06-27 23:08:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 23:08:26,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 23:08:26,803 INFO L175 Difference]: Start difference. First operand has 363 places, 418 transitions, 5480 flow. Second operand 8 states and 187 transitions. [2024-06-27 23:08:26,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 451 transitions, 6516 flow [2024-06-27 23:08:35,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 451 transitions, 6393 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 23:08:35,785 INFO L231 Difference]: Finished difference. Result has 363 places, 413 transitions, 5374 flow [2024-06-27 23:08:35,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=363, PETRI_TRANSITIONS=413} [2024-06-27 23:08:35,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-27 23:08:35,786 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 413 transitions, 5374 flow [2024-06-27 23:08:35,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:35,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:35,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:08:35,786 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:35,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1312640133, now seen corresponding path program 14 times [2024-06-27 23:08:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:35,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405737780] [2024-06-27 23:08:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:35,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:35,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405737780] [2024-06-27 23:08:35,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405737780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:35,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:35,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794717746] [2024-06-27 23:08:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:35,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:35,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:35,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:35,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 413 transitions, 5374 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:35,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:35,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:35,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:37,694 INFO L124 PetriNetUnfolderBase]: 4146/7109 cut-off events. [2024-06-27 23:08:37,694 INFO L125 PetriNetUnfolderBase]: For 1723572/1723581 co-relation queries the response was YES. [2024-06-27 23:08:37,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67294 conditions, 7109 events. 4146/7109 cut-off events. For 1723572/1723581 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51163 event pairs, 1554 based on Foata normal form. 41/7145 useless extension candidates. Maximal degree in co-relation 67118. Up to 6337 conditions per place. [2024-06-27 23:08:37,790 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 394 selfloop transitions, 32 changer transitions 4/437 dead transitions. [2024-06-27 23:08:37,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 437 transitions, 6340 flow [2024-06-27 23:08:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 23:08:37,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 23:08:37,791 INFO L175 Difference]: Start difference. First operand has 363 places, 413 transitions, 5374 flow. Second operand 8 states and 182 transitions. [2024-06-27 23:08:37,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 437 transitions, 6340 flow [2024-06-27 23:08:45,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 437 transitions, 6260 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 23:08:45,324 INFO L231 Difference]: Finished difference. Result has 356 places, 411 transitions, 5336 flow [2024-06-27 23:08:45,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5336, PETRI_PLACES=356, PETRI_TRANSITIONS=411} [2024-06-27 23:08:45,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 23:08:45,325 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 411 transitions, 5336 flow [2024-06-27 23:08:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:45,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:45,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:45,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 23:08:45,325 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:45,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:45,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1312313517, now seen corresponding path program 15 times [2024-06-27 23:08:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:45,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942371576] [2024-06-27 23:08:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:45,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:45,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942371576] [2024-06-27 23:08:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942371576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:45,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497198214] [2024-06-27 23:08:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:45,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:45,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 411 transitions, 5336 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:45,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:45,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:45,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:47,012 INFO L124 PetriNetUnfolderBase]: 4019/6920 cut-off events. [2024-06-27 23:08:47,012 INFO L125 PetriNetUnfolderBase]: For 1511001/1511010 co-relation queries the response was YES. [2024-06-27 23:08:47,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62676 conditions, 6920 events. 4019/6920 cut-off events. For 1511001/1511010 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 49751 event pairs, 1409 based on Foata normal form. 37/6952 useless extension candidates. Maximal degree in co-relation 62504. Up to 5548 conditions per place. [2024-06-27 23:08:47,103 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 400 selfloop transitions, 31 changer transitions 4/442 dead transitions. [2024-06-27 23:08:47,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 442 transitions, 6586 flow [2024-06-27 23:08:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 23:08:47,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 23:08:47,103 INFO L175 Difference]: Start difference. First operand has 356 places, 411 transitions, 5336 flow. Second operand 8 states and 187 transitions. [2024-06-27 23:08:47,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 442 transitions, 6586 flow [2024-06-27 23:08:52,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 442 transitions, 6488 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 23:08:52,860 INFO L231 Difference]: Finished difference. Result has 357 places, 408 transitions, 5261 flow [2024-06-27 23:08:52,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5261, PETRI_PLACES=357, PETRI_TRANSITIONS=408} [2024-06-27 23:08:52,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 23:08:52,861 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 408 transitions, 5261 flow [2024-06-27 23:08:52,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:52,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:52,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:52,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 23:08:52,861 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:52,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:52,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1312313703, now seen corresponding path program 15 times [2024-06-27 23:08:52,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:52,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928593427] [2024-06-27 23:08:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:52,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:52,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:52,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928593427] [2024-06-27 23:08:52,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928593427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:52,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:52,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161974491] [2024-06-27 23:08:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:53,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:53,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 408 transitions, 5261 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:53,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:53,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:53,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:08:54,411 INFO L124 PetriNetUnfolderBase]: 3915/6768 cut-off events. [2024-06-27 23:08:54,411 INFO L125 PetriNetUnfolderBase]: For 1370267/1370276 co-relation queries the response was YES. [2024-06-27 23:08:54,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58777 conditions, 6768 events. 3915/6768 cut-off events. For 1370267/1370276 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 48684 event pairs, 1342 based on Foata normal form. 37/6800 useless extension candidates. Maximal degree in co-relation 58604. Up to 5548 conditions per place. [2024-06-27 23:08:54,509 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 398 selfloop transitions, 28 changer transitions 6/439 dead transitions. [2024-06-27 23:08:54,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 439 transitions, 6507 flow [2024-06-27 23:08:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:08:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:08:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 23:08:54,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 23:08:54,509 INFO L175 Difference]: Start difference. First operand has 357 places, 408 transitions, 5261 flow. Second operand 8 states and 187 transitions. [2024-06-27 23:08:54,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 439 transitions, 6507 flow [2024-06-27 23:08:59,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 439 transitions, 6426 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 23:08:59,764 INFO L231 Difference]: Finished difference. Result has 356 places, 403 transitions, 5180 flow [2024-06-27 23:08:59,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5180, PETRI_PLACES=356, PETRI_TRANSITIONS=403} [2024-06-27 23:08:59,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 23:08:59,765 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 403 transitions, 5180 flow [2024-06-27 23:08:59,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:59,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:08:59,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:08:59,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 23:08:59,765 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:08:59,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:08:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1312461387, now seen corresponding path program 16 times [2024-06-27 23:08:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:08:59,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980633710] [2024-06-27 23:08:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:08:59,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:08:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:08:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:08:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:08:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980633710] [2024-06-27 23:08:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980633710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:08:59,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:08:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:08:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838851984] [2024-06-27 23:08:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:08:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:08:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:08:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:08:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:08:59,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:08:59,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 403 transitions, 5180 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:08:59,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:08:59,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:08:59,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:01,177 INFO L124 PetriNetUnfolderBase]: 3726/6421 cut-off events. [2024-06-27 23:09:01,177 INFO L125 PetriNetUnfolderBase]: For 1205004/1205013 co-relation queries the response was YES. [2024-06-27 23:09:01,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53310 conditions, 6421 events. 3726/6421 cut-off events. For 1205004/1205013 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45671 event pairs, 1297 based on Foata normal form. 41/6453 useless extension candidates. Maximal degree in co-relation 53138. Up to 5680 conditions per place. [2024-06-27 23:09:01,262 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 381 selfloop transitions, 21 changer transitions 18/427 dead transitions. [2024-06-27 23:09:01,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 427 transitions, 6126 flow [2024-06-27 23:09:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 23:09:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-27 23:09:01,262 INFO L175 Difference]: Start difference. First operand has 356 places, 403 transitions, 5180 flow. Second operand 8 states and 177 transitions. [2024-06-27 23:09:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 427 transitions, 6126 flow [2024-06-27 23:09:05,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 427 transitions, 6015 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 23:09:05,899 INFO L231 Difference]: Finished difference. Result has 354 places, 395 transitions, 5007 flow [2024-06-27 23:09:05,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5007, PETRI_PLACES=354, PETRI_TRANSITIONS=395} [2024-06-27 23:09:05,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 23:09:05,900 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 395 transitions, 5007 flow [2024-06-27 23:09:05,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:05,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:05,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:05,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 23:09:05,900 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:05,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1543092445, now seen corresponding path program 16 times [2024-06-27 23:09:05,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:05,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801275885] [2024-06-27 23:09:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801275885] [2024-06-27 23:09:06,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801275885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:06,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:06,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144080121] [2024-06-27 23:09:06,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:06,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:06,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:06,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 395 transitions, 5007 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:06,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:06,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:06,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:07,408 INFO L124 PetriNetUnfolderBase]: 3644/6261 cut-off events. [2024-06-27 23:09:07,408 INFO L125 PetriNetUnfolderBase]: For 1197806/1197812 co-relation queries the response was YES. [2024-06-27 23:09:07,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52141 conditions, 6261 events. 3644/6261 cut-off events. For 1197806/1197812 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44137 event pairs, 1243 based on Foata normal form. 39/6293 useless extension candidates. Maximal degree in co-relation 51970. Up to 5433 conditions per place. [2024-06-27 23:09:07,490 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 344 selfloop transitions, 65 changer transitions 7/423 dead transitions. [2024-06-27 23:09:07,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 423 transitions, 5967 flow [2024-06-27 23:09:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 23:09:07,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:09:07,491 INFO L175 Difference]: Start difference. First operand has 354 places, 395 transitions, 5007 flow. Second operand 8 states and 192 transitions. [2024-06-27 23:09:07,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 423 transitions, 5967 flow [2024-06-27 23:09:12,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 423 transitions, 5908 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 23:09:12,872 INFO L231 Difference]: Finished difference. Result has 342 places, 391 transitions, 5015 flow [2024-06-27 23:09:12,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5015, PETRI_PLACES=342, PETRI_TRANSITIONS=391} [2024-06-27 23:09:12,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-27 23:09:12,872 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 391 transitions, 5015 flow [2024-06-27 23:09:12,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:12,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:12,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:12,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 23:09:12,873 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:12,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1532367685, now seen corresponding path program 17 times [2024-06-27 23:09:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:12,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779457904] [2024-06-27 23:09:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:13,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:13,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779457904] [2024-06-27 23:09:13,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779457904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:13,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640935659] [2024-06-27 23:09:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:13,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:13,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:13,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 391 transitions, 5015 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:13,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:13,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:13,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:14,334 INFO L124 PetriNetUnfolderBase]: 3619/6230 cut-off events. [2024-06-27 23:09:14,334 INFO L125 PetriNetUnfolderBase]: For 1122616/1122622 co-relation queries the response was YES. [2024-06-27 23:09:14,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51256 conditions, 6230 events. 3619/6230 cut-off events. For 1122616/1122622 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43862 event pairs, 1252 based on Foata normal form. 39/6262 useless extension candidates. Maximal degree in co-relation 51090. Up to 5404 conditions per place. [2024-06-27 23:09:14,415 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 348 selfloop transitions, 58 changer transitions 9/422 dead transitions. [2024-06-27 23:09:14,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 422 transitions, 5983 flow [2024-06-27 23:09:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 23:09:14,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 23:09:14,416 INFO L175 Difference]: Start difference. First operand has 342 places, 391 transitions, 5015 flow. Second operand 8 states and 195 transitions. [2024-06-27 23:09:14,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 422 transitions, 5983 flow [2024-06-27 23:09:18,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 422 transitions, 5844 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 23:09:18,367 INFO L231 Difference]: Finished difference. Result has 341 places, 385 transitions, 4917 flow [2024-06-27 23:09:18,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4917, PETRI_PLACES=341, PETRI_TRANSITIONS=385} [2024-06-27 23:09:18,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 23:09:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 385 transitions, 4917 flow [2024-06-27 23:09:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:18,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:18,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 23:09:18,368 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:18,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1532041255, now seen corresponding path program 18 times [2024-06-27 23:09:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:18,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161891567] [2024-06-27 23:09:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:18,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161891567] [2024-06-27 23:09:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161891567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:18,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:18,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:18,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836782117] [2024-06-27 23:09:18,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:18,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:18,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:18,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:18,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 385 transitions, 4917 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:18,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:18,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:18,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:19,801 INFO L124 PetriNetUnfolderBase]: 3523/6098 cut-off events. [2024-06-27 23:09:19,802 INFO L125 PetriNetUnfolderBase]: For 974951/974957 co-relation queries the response was YES. [2024-06-27 23:09:19,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47987 conditions, 6098 events. 3523/6098 cut-off events. For 974951/974957 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43048 event pairs, 988 based on Foata normal form. 35/6128 useless extension candidates. Maximal degree in co-relation 47821. Up to 4697 conditions per place. [2024-06-27 23:09:19,879 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 345 selfloop transitions, 57 changer transitions 16/425 dead transitions. [2024-06-27 23:09:19,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 425 transitions, 5963 flow [2024-06-27 23:09:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 23:09:19,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-27 23:09:19,879 INFO L175 Difference]: Start difference. First operand has 341 places, 385 transitions, 4917 flow. Second operand 8 states and 203 transitions. [2024-06-27 23:09:19,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 425 transitions, 5963 flow [2024-06-27 23:09:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 425 transitions, 5821 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 23:09:24,117 INFO L231 Difference]: Finished difference. Result has 339 places, 373 transitions, 4721 flow [2024-06-27 23:09:24,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4721, PETRI_PLACES=339, PETRI_TRANSITIONS=373} [2024-06-27 23:09:24,118 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 23:09:24,118 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 373 transitions, 4721 flow [2024-06-27 23:09:24,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:24,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:24,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 23:09:24,118 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:24,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1940782345, now seen corresponding path program 19 times [2024-06-27 23:09:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057088809] [2024-06-27 23:09:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:24,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:24,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057088809] [2024-06-27 23:09:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057088809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:24,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932331514] [2024-06-27 23:09:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:24,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:24,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:24,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:24,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:24,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 373 transitions, 4721 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:24,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:24,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:25,514 INFO L124 PetriNetUnfolderBase]: 3378/5819 cut-off events. [2024-06-27 23:09:25,515 INFO L125 PetriNetUnfolderBase]: For 974567/974573 co-relation queries the response was YES. [2024-06-27 23:09:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 5819 events. 3378/5819 cut-off events. For 974567/974573 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 40524 event pairs, 1054 based on Foata normal form. 35/5849 useless extension candidates. Maximal degree in co-relation 46568. Up to 4316 conditions per place. [2024-06-27 23:09:25,589 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 72 changer transitions 11/422 dead transitions. [2024-06-27 23:09:25,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 422 transitions, 5985 flow [2024-06-27 23:09:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:09:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:09:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-27 23:09:25,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-27 23:09:25,590 INFO L175 Difference]: Start difference. First operand has 339 places, 373 transitions, 4721 flow. Second operand 10 states and 246 transitions. [2024-06-27 23:09:25,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 422 transitions, 5985 flow [2024-06-27 23:09:31,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 422 transitions, 5853 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 23:09:31,340 INFO L231 Difference]: Finished difference. Result has 339 places, 370 transitions, 4715 flow [2024-06-27 23:09:31,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4715, PETRI_PLACES=339, PETRI_TRANSITIONS=370} [2024-06-27 23:09:31,341 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 23:09:31,341 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 370 transitions, 4715 flow [2024-06-27 23:09:31,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:31,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:31,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 23:09:31,341 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:31,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1852216585, now seen corresponding path program 20 times [2024-06-27 23:09:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943747809] [2024-06-27 23:09:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:31,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943747809] [2024-06-27 23:09:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943747809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:31,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422804630] [2024-06-27 23:09:31,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:31,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:31,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 370 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:31,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:31,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:31,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:32,717 INFO L124 PetriNetUnfolderBase]: 3245/5602 cut-off events. [2024-06-27 23:09:32,718 INFO L125 PetriNetUnfolderBase]: For 848108/848114 co-relation queries the response was YES. [2024-06-27 23:09:32,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43920 conditions, 5602 events. 3245/5602 cut-off events. For 848108/848114 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 38965 event pairs, 765 based on Foata normal form. 29/5626 useless extension candidates. Maximal degree in co-relation 43755. Up to 3134 conditions per place. [2024-06-27 23:09:32,790 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 76 changer transitions 9/421 dead transitions. [2024-06-27 23:09:32,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 421 transitions, 6221 flow [2024-06-27 23:09:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 23:09:32,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 23:09:32,791 INFO L175 Difference]: Start difference. First operand has 339 places, 370 transitions, 4715 flow. Second operand 9 states and 231 transitions. [2024-06-27 23:09:32,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 421 transitions, 6221 flow [2024-06-27 23:09:37,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 421 transitions, 6069 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 23:09:37,241 INFO L231 Difference]: Finished difference. Result has 338 places, 368 transitions, 4708 flow [2024-06-27 23:09:37,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4708, PETRI_PLACES=338, PETRI_TRANSITIONS=368} [2024-06-27 23:09:37,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-27 23:09:37,242 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 368 transitions, 4708 flow [2024-06-27 23:09:37,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:37,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:37,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:37,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 23:09:37,242 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:37,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash -294106433, now seen corresponding path program 21 times [2024-06-27 23:09:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383057751] [2024-06-27 23:09:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383057751] [2024-06-27 23:09:37,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383057751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:37,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:37,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:37,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441674119] [2024-06-27 23:09:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:37,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 368 transitions, 4708 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:37,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:37,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:37,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:38,532 INFO L124 PetriNetUnfolderBase]: 3121/5370 cut-off events. [2024-06-27 23:09:38,532 INFO L125 PetriNetUnfolderBase]: For 720632/720638 co-relation queries the response was YES. [2024-06-27 23:09:38,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42115 conditions, 5370 events. 3121/5370 cut-off events. For 720632/720638 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36962 event pairs, 991 based on Foata normal form. 13/5376 useless extension candidates. Maximal degree in co-relation 41950. Up to 4844 conditions per place. [2024-06-27 23:09:38,598 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 40 changer transitions 10/387 dead transitions. [2024-06-27 23:09:38,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 387 transitions, 5542 flow [2024-06-27 23:09:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 23:09:38,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 23:09:38,599 INFO L175 Difference]: Start difference. First operand has 338 places, 368 transitions, 4708 flow. Second operand 8 states and 179 transitions. [2024-06-27 23:09:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 387 transitions, 5542 flow [2024-06-27 23:09:43,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 387 transitions, 5382 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 23:09:43,025 INFO L231 Difference]: Finished difference. Result has 337 places, 364 transitions, 4570 flow [2024-06-27 23:09:43,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4548, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4570, PETRI_PLACES=337, PETRI_TRANSITIONS=364} [2024-06-27 23:09:43,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 23:09:43,026 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 364 transitions, 4570 flow [2024-06-27 23:09:43,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:43,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:43,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:43,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 23:09:43,026 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:43,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash -412194113, now seen corresponding path program 22 times [2024-06-27 23:09:43,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:43,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290082981] [2024-06-27 23:09:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:43,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290082981] [2024-06-27 23:09:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290082981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:43,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:43,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145605154] [2024-06-27 23:09:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:43,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:43,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:43,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 364 transitions, 4570 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:43,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:43,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:43,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:44,121 INFO L124 PetriNetUnfolderBase]: 3048/5226 cut-off events. [2024-06-27 23:09:44,121 INFO L125 PetriNetUnfolderBase]: For 717223/717228 co-relation queries the response was YES. [2024-06-27 23:09:44,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41140 conditions, 5226 events. 3048/5226 cut-off events. For 717223/717228 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35673 event pairs, 960 based on Foata normal form. 10/5228 useless extension candidates. Maximal degree in co-relation 40975. Up to 4637 conditions per place. [2024-06-27 23:09:44,192 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 62 changer transitions 10/384 dead transitions. [2024-06-27 23:09:44,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 384 transitions, 5412 flow [2024-06-27 23:09:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 23:09:44,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 23:09:44,193 INFO L175 Difference]: Start difference. First operand has 337 places, 364 transitions, 4570 flow. Second operand 8 states and 181 transitions. [2024-06-27 23:09:44,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 384 transitions, 5412 flow [2024-06-27 23:09:47,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 384 transitions, 5292 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:09:47,700 INFO L231 Difference]: Finished difference. Result has 333 places, 361 transitions, 4544 flow [2024-06-27 23:09:47,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4544, PETRI_PLACES=333, PETRI_TRANSITIONS=361} [2024-06-27 23:09:47,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 23:09:47,701 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 361 transitions, 4544 flow [2024-06-27 23:09:47,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:47,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:47,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:47,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 23:09:47,701 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:47,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -412254563, now seen corresponding path program 23 times [2024-06-27 23:09:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166925952] [2024-06-27 23:09:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166925952] [2024-06-27 23:09:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166925952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:47,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:47,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753255587] [2024-06-27 23:09:47,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:47,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:47,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:47,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 361 transitions, 4544 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:47,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:47,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:47,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:48,867 INFO L124 PetriNetUnfolderBase]: 3043/5219 cut-off events. [2024-06-27 23:09:48,867 INFO L125 PetriNetUnfolderBase]: For 704082/704087 co-relation queries the response was YES. [2024-06-27 23:09:48,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40985 conditions, 5219 events. 3043/5219 cut-off events. For 704082/704087 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35627 event pairs, 956 based on Foata normal form. 10/5221 useless extension candidates. Maximal degree in co-relation 40821. Up to 4589 conditions per place. [2024-06-27 23:09:48,943 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 303 selfloop transitions, 59 changer transitions 16/385 dead transitions. [2024-06-27 23:09:48,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 385 transitions, 5426 flow [2024-06-27 23:09:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:09:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:09:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 23:09:48,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 23:09:48,944 INFO L175 Difference]: Start difference. First operand has 333 places, 361 transitions, 4544 flow. Second operand 8 states and 183 transitions. [2024-06-27 23:09:48,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 385 transitions, 5426 flow [2024-06-27 23:09:52,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 385 transitions, 5296 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:09:52,770 INFO L231 Difference]: Finished difference. Result has 331 places, 357 transitions, 4474 flow [2024-06-27 23:09:52,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4474, PETRI_PLACES=331, PETRI_TRANSITIONS=357} [2024-06-27 23:09:52,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 23:09:52,770 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 357 transitions, 4474 flow [2024-06-27 23:09:52,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:52,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 23:09:52,771 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1861391035, now seen corresponding path program 24 times [2024-06-27 23:09:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33841502] [2024-06-27 23:09:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:52,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:52,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33841502] [2024-06-27 23:09:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33841502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:52,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:52,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852144] [2024-06-27 23:09:52,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:52,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:52,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:52,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 357 transitions, 4474 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:52,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:52,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:52,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:53,954 INFO L124 PetriNetUnfolderBase]: 2990/5117 cut-off events. [2024-06-27 23:09:53,954 INFO L125 PetriNetUnfolderBase]: For 680219/680225 co-relation queries the response was YES. [2024-06-27 23:09:54,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40141 conditions, 5117 events. 2990/5117 cut-off events. For 680219/680225 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34649 event pairs, 911 based on Foata normal form. 13/5120 useless extension candidates. Maximal degree in co-relation 39978. Up to 4244 conditions per place. [2024-06-27 23:09:54,017 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 320 selfloop transitions, 58 changer transitions 9/394 dead transitions. [2024-06-27 23:09:54,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 394 transitions, 5630 flow [2024-06-27 23:09:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 23:09:54,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 23:09:54,018 INFO L175 Difference]: Start difference. First operand has 331 places, 357 transitions, 4474 flow. Second operand 9 states and 214 transitions. [2024-06-27 23:09:54,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 394 transitions, 5630 flow [2024-06-27 23:09:57,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 394 transitions, 5496 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:09:57,358 INFO L231 Difference]: Finished difference. Result has 328 places, 354 transitions, 4420 flow [2024-06-27 23:09:57,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4420, PETRI_PLACES=328, PETRI_TRANSITIONS=354} [2024-06-27 23:09:57,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-27 23:09:57,359 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 354 transitions, 4420 flow [2024-06-27 23:09:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:57,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:09:57,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:09:57,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 23:09:57,359 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:09:57,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:09:57,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1928200469, now seen corresponding path program 25 times [2024-06-27 23:09:57,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:09:57,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383704390] [2024-06-27 23:09:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:09:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:09:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:09:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:09:57,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:09:57,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383704390] [2024-06-27 23:09:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383704390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:09:57,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:09:57,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:09:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469821553] [2024-06-27 23:09:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:09:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:09:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:09:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:09:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:09:57,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:09:57,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 354 transitions, 4420 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:09:57,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:09:57,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:09:57,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:09:58,444 INFO L124 PetriNetUnfolderBase]: 2938/5051 cut-off events. [2024-06-27 23:09:58,444 INFO L125 PetriNetUnfolderBase]: For 656171/656177 co-relation queries the response was YES. [2024-06-27 23:09:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39481 conditions, 5051 events. 2938/5051 cut-off events. For 656171/656177 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34272 event pairs, 923 based on Foata normal form. 13/5057 useless extension candidates. Maximal degree in co-relation 39320. Up to 4473 conditions per place. [2024-06-27 23:09:58,516 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 312 selfloop transitions, 54 changer transitions 11/384 dead transitions. [2024-06-27 23:09:58,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 384 transitions, 5290 flow [2024-06-27 23:09:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:09:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:09:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 23:09:58,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:09:58,516 INFO L175 Difference]: Start difference. First operand has 328 places, 354 transitions, 4420 flow. Second operand 9 states and 207 transitions. [2024-06-27 23:09:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 384 transitions, 5290 flow [2024-06-27 23:10:02,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 384 transitions, 5119 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-27 23:10:02,033 INFO L231 Difference]: Finished difference. Result has 325 places, 350 transitions, 4320 flow [2024-06-27 23:10:02,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4320, PETRI_PLACES=325, PETRI_TRANSITIONS=350} [2024-06-27 23:10:02,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 23:10:02,033 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 350 transitions, 4320 flow [2024-06-27 23:10:02,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:02,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:02,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 23:10:02,034 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:02,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1941108775, now seen corresponding path program 26 times [2024-06-27 23:10:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:02,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750690361] [2024-06-27 23:10:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:02,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750690361] [2024-06-27 23:10:02,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750690361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:02,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:02,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000130079] [2024-06-27 23:10:02,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:02,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:02,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:02,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 350 transitions, 4320 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:02,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:02,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:02,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:03,192 INFO L124 PetriNetUnfolderBase]: 2813/4838 cut-off events. [2024-06-27 23:10:03,192 INFO L125 PetriNetUnfolderBase]: For 601322/601328 co-relation queries the response was YES. [2024-06-27 23:10:03,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34684 conditions, 4838 events. 2813/4838 cut-off events. For 601322/601328 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 32540 event pairs, 846 based on Foata normal form. 39/4870 useless extension candidates. Maximal degree in co-relation 34525. Up to 4142 conditions per place. [2024-06-27 23:10:03,248 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 50 changer transitions 15/388 dead transitions. [2024-06-27 23:10:03,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 388 transitions, 5224 flow [2024-06-27 23:10:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 23:10:03,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 23:10:03,249 INFO L175 Difference]: Start difference. First operand has 325 places, 350 transitions, 4320 flow. Second operand 10 states and 232 transitions. [2024-06-27 23:10:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 388 transitions, 5224 flow [2024-06-27 23:10:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 388 transitions, 5102 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:10:05,284 INFO L231 Difference]: Finished difference. Result has 322 places, 343 transitions, 4231 flow [2024-06-27 23:10:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4231, PETRI_PLACES=322, PETRI_TRANSITIONS=343} [2024-06-27 23:10:05,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 23:10:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 343 transitions, 4231 flow [2024-06-27 23:10:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 23:10:05,285 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:05,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1937127445, now seen corresponding path program 27 times [2024-06-27 23:10:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720881761] [2024-06-27 23:10:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:05,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:05,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720881761] [2024-06-27 23:10:05,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720881761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:05,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:05,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:05,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904832154] [2024-06-27 23:10:05,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:05,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:05,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:05,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 343 transitions, 4231 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:06,381 INFO L124 PetriNetUnfolderBase]: 2569/4394 cut-off events. [2024-06-27 23:10:06,381 INFO L125 PetriNetUnfolderBase]: For 419439/419445 co-relation queries the response was YES. [2024-06-27 23:10:06,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31741 conditions, 4394 events. 2569/4394 cut-off events. For 419439/419445 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 28858 event pairs, 508 based on Foata normal form. 11/4400 useless extension candidates. Maximal degree in co-relation 31584. Up to 3134 conditions per place. [2024-06-27 23:10:06,433 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 53 changer transitions 15/383 dead transitions. [2024-06-27 23:10:06,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 383 transitions, 5159 flow [2024-06-27 23:10:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 23:10:06,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 23:10:06,434 INFO L175 Difference]: Start difference. First operand has 322 places, 343 transitions, 4231 flow. Second operand 9 states and 215 transitions. [2024-06-27 23:10:06,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 383 transitions, 5159 flow [2024-06-27 23:10:08,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 383 transitions, 5049 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 23:10:08,549 INFO L231 Difference]: Finished difference. Result has 317 places, 338 transitions, 4167 flow [2024-06-27 23:10:08,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4167, PETRI_PLACES=317, PETRI_TRANSITIONS=338} [2024-06-27 23:10:08,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 23:10:08,549 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 338 transitions, 4167 flow [2024-06-27 23:10:08,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:08,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:08,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 23:10:08,550 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:08,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1956086303, now seen corresponding path program 1 times [2024-06-27 23:10:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558687753] [2024-06-27 23:10:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:08,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558687753] [2024-06-27 23:10:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558687753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865113786] [2024-06-27 23:10:08,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:08,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:08,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:08,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 338 transitions, 4167 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:08,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:08,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:08,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:09,550 INFO L124 PetriNetUnfolderBase]: 2511/4266 cut-off events. [2024-06-27 23:10:09,550 INFO L125 PetriNetUnfolderBase]: For 446400/446406 co-relation queries the response was YES. [2024-06-27 23:10:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32474 conditions, 4266 events. 2511/4266 cut-off events. For 446400/446406 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 27596 event pairs, 568 based on Foata normal form. 11/4272 useless extension candidates. Maximal degree in co-relation 32319. Up to 3128 conditions per place. [2024-06-27 23:10:09,605 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 280 selfloop transitions, 98 changer transitions 0/385 dead transitions. [2024-06-27 23:10:09,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 385 transitions, 5417 flow [2024-06-27 23:10:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-27 23:10:09,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-27 23:10:09,606 INFO L175 Difference]: Start difference. First operand has 317 places, 338 transitions, 4167 flow. Second operand 10 states and 242 transitions. [2024-06-27 23:10:09,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 385 transitions, 5417 flow [2024-06-27 23:10:11,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 385 transitions, 5301 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 23:10:11,624 INFO L231 Difference]: Finished difference. Result has 314 places, 340 transitions, 4377 flow [2024-06-27 23:10:11,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4377, PETRI_PLACES=314, PETRI_TRANSITIONS=340} [2024-06-27 23:10:11,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 23:10:11,624 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 340 transitions, 4377 flow [2024-06-27 23:10:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:11,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:11,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:11,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 23:10:11,624 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2040980051, now seen corresponding path program 1 times [2024-06-27 23:10:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653717250] [2024-06-27 23:10:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653717250] [2024-06-27 23:10:11,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653717250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:11,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:11,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990983519] [2024-06-27 23:10:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:11,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:11,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:11,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 340 transitions, 4377 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:11,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:11,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:11,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:12,618 INFO L124 PetriNetUnfolderBase]: 2531/4302 cut-off events. [2024-06-27 23:10:12,619 INFO L125 PetriNetUnfolderBase]: For 441051/441057 co-relation queries the response was YES. [2024-06-27 23:10:12,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32916 conditions, 4302 events. 2531/4302 cut-off events. For 441051/441057 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 27943 event pairs, 577 based on Foata normal form. 11/4308 useless extension candidates. Maximal degree in co-relation 32762. Up to 3709 conditions per place. [2024-06-27 23:10:12,673 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 297 selfloop transitions, 64 changer transitions 0/368 dead transitions. [2024-06-27 23:10:12,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 368 transitions, 5271 flow [2024-06-27 23:10:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 23:10:12,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 23:10:12,674 INFO L175 Difference]: Start difference. First operand has 314 places, 340 transitions, 4377 flow. Second operand 8 states and 188 transitions. [2024-06-27 23:10:12,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 368 transitions, 5271 flow [2024-06-27 23:10:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 368 transitions, 4962 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:10:14,492 INFO L231 Difference]: Finished difference. Result has 314 places, 342 transitions, 4266 flow [2024-06-27 23:10:14,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4266, PETRI_PLACES=314, PETRI_TRANSITIONS=342} [2024-06-27 23:10:14,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 23:10:14,493 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 342 transitions, 4266 flow [2024-06-27 23:10:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:14,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:14,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:14,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 23:10:14,493 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:14,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2040980423, now seen corresponding path program 2 times [2024-06-27 23:10:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230806200] [2024-06-27 23:10:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:14,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:14,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230806200] [2024-06-27 23:10:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230806200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:14,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964905150] [2024-06-27 23:10:14,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:14,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:14,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 342 transitions, 4266 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:15,533 INFO L124 PetriNetUnfolderBase]: 2551/4336 cut-off events. [2024-06-27 23:10:15,533 INFO L125 PetriNetUnfolderBase]: For 444362/444368 co-relation queries the response was YES. [2024-06-27 23:10:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32716 conditions, 4336 events. 2551/4336 cut-off events. For 444362/444368 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28149 event pairs, 565 based on Foata normal form. 11/4342 useless extension candidates. Maximal degree in co-relation 32562. Up to 3172 conditions per place. [2024-06-27 23:10:15,585 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 278 selfloop transitions, 101 changer transitions 0/386 dead transitions. [2024-06-27 23:10:15,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 386 transitions, 5460 flow [2024-06-27 23:10:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 23:10:15,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-27 23:10:15,586 INFO L175 Difference]: Start difference. First operand has 314 places, 342 transitions, 4266 flow. Second operand 10 states and 241 transitions. [2024-06-27 23:10:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 386 transitions, 5460 flow [2024-06-27 23:10:18,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 386 transitions, 5290 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:18,168 INFO L231 Difference]: Finished difference. Result has 318 places, 343 transitions, 4350 flow [2024-06-27 23:10:18,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4350, PETRI_PLACES=318, PETRI_TRANSITIONS=343} [2024-06-27 23:10:18,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-27 23:10:18,169 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 343 transitions, 4350 flow [2024-06-27 23:10:18,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:18,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:18,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:18,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 23:10:18,169 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:18,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2039102381, now seen corresponding path program 2 times [2024-06-27 23:10:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:18,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363627017] [2024-06-27 23:10:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:18,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363627017] [2024-06-27 23:10:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363627017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:18,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:18,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:18,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838537048] [2024-06-27 23:10:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:18,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:18,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 343 transitions, 4350 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:18,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:18,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:18,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:19,132 INFO L124 PetriNetUnfolderBase]: 2579/4386 cut-off events. [2024-06-27 23:10:19,132 INFO L125 PetriNetUnfolderBase]: For 463822/463828 co-relation queries the response was YES. [2024-06-27 23:10:19,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33234 conditions, 4386 events. 2579/4386 cut-off events. For 463822/463828 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28588 event pairs, 707 based on Foata normal form. 13/4394 useless extension candidates. Maximal degree in co-relation 33079. Up to 3881 conditions per place. [2024-06-27 23:10:19,190 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 305 selfloop transitions, 51 changer transitions 0/363 dead transitions. [2024-06-27 23:10:19,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 363 transitions, 5182 flow [2024-06-27 23:10:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 23:10:19,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 23:10:19,191 INFO L175 Difference]: Start difference. First operand has 318 places, 343 transitions, 4350 flow. Second operand 8 states and 181 transitions. [2024-06-27 23:10:19,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 363 transitions, 5182 flow [2024-06-27 23:10:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 363 transitions, 4978 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:21,362 INFO L231 Difference]: Finished difference. Result has 319 places, 344 transitions, 4298 flow [2024-06-27 23:10:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4298, PETRI_PLACES=319, PETRI_TRANSITIONS=344} [2024-06-27 23:10:21,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-27 23:10:21,362 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 344 transitions, 4298 flow [2024-06-27 23:10:21,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:21,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:21,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 23:10:21,363 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:21,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1952414663, now seen corresponding path program 3 times [2024-06-27 23:10:21,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:21,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616698476] [2024-06-27 23:10:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:21,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:21,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:21,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616698476] [2024-06-27 23:10:21,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616698476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:21,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:21,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:21,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713467198] [2024-06-27 23:10:21,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:21,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:21,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:21,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:21,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 344 transitions, 4298 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:21,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:21,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:21,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:22,489 INFO L124 PetriNetUnfolderBase]: 2566/4363 cut-off events. [2024-06-27 23:10:22,489 INFO L125 PetriNetUnfolderBase]: For 433006/433012 co-relation queries the response was YES. [2024-06-27 23:10:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32118 conditions, 4363 events. 2566/4363 cut-off events. For 433006/433012 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 28460 event pairs, 688 based on Foata normal form. 11/4365 useless extension candidates. Maximal degree in co-relation 31962. Up to 3731 conditions per place. [2024-06-27 23:10:22,536 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 283 selfloop transitions, 88 changer transitions 0/378 dead transitions. [2024-06-27 23:10:22,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 378 transitions, 5168 flow [2024-06-27 23:10:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-27 23:10:22,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-27 23:10:22,537 INFO L175 Difference]: Start difference. First operand has 319 places, 344 transitions, 4298 flow. Second operand 11 states and 248 transitions. [2024-06-27 23:10:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 378 transitions, 5168 flow [2024-06-27 23:10:24,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 378 transitions, 5012 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:24,466 INFO L231 Difference]: Finished difference. Result has 324 places, 344 transitions, 4322 flow [2024-06-27 23:10:24,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4322, PETRI_PLACES=324, PETRI_TRANSITIONS=344} [2024-06-27 23:10:24,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 23:10:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 344 transitions, 4322 flow [2024-06-27 23:10:24,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:24,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:24,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:24,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 23:10:24,467 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:24,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1952414291, now seen corresponding path program 3 times [2024-06-27 23:10:24,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:24,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696134183] [2024-06-27 23:10:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:24,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696134183] [2024-06-27 23:10:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696134183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:24,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:24,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:24,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469064454] [2024-06-27 23:10:24,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:24,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:24,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:24,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:24,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 344 transitions, 4322 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:24,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:24,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:24,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:25,552 INFO L124 PetriNetUnfolderBase]: 2586/4397 cut-off events. [2024-06-27 23:10:25,552 INFO L125 PetriNetUnfolderBase]: For 438114/438120 co-relation queries the response was YES. [2024-06-27 23:10:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32278 conditions, 4397 events. 2586/4397 cut-off events. For 438114/438120 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28688 event pairs, 688 based on Foata normal form. 11/4403 useless extension candidates. Maximal degree in co-relation 32121. Up to 3834 conditions per place. [2024-06-27 23:10:25,602 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 304 selfloop transitions, 57 changer transitions 0/368 dead transitions. [2024-06-27 23:10:25,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 368 transitions, 5190 flow [2024-06-27 23:10:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:10:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:10:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-27 23:10:25,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-27 23:10:25,603 INFO L175 Difference]: Start difference. First operand has 324 places, 344 transitions, 4322 flow. Second operand 9 states and 202 transitions. [2024-06-27 23:10:25,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 368 transitions, 5190 flow [2024-06-27 23:10:27,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 368 transitions, 4971 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 23:10:27,554 INFO L231 Difference]: Finished difference. Result has 322 places, 345 transitions, 4267 flow [2024-06-27 23:10:27,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4267, PETRI_PLACES=322, PETRI_TRANSITIONS=345} [2024-06-27 23:10:27,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 23:10:27,555 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 345 transitions, 4267 flow [2024-06-27 23:10:27,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:27,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:27,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:27,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 23:10:27,555 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:27,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1543492159, now seen corresponding path program 1 times [2024-06-27 23:10:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:27,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805304920] [2024-06-27 23:10:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805304920] [2024-06-27 23:10:27,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805304920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:27,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034830258] [2024-06-27 23:10:27,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:27,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:27,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 345 transitions, 4267 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:27,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:27,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:28,606 INFO L124 PetriNetUnfolderBase]: 2690/4595 cut-off events. [2024-06-27 23:10:28,607 INFO L125 PetriNetUnfolderBase]: For 561237/561243 co-relation queries the response was YES. [2024-06-27 23:10:28,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33176 conditions, 4595 events. 2690/4595 cut-off events. For 561237/561243 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30309 event pairs, 676 based on Foata normal form. 35/4625 useless extension candidates. Maximal degree in co-relation 33018. Up to 3841 conditions per place. [2024-06-27 23:10:28,791 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 322 selfloop transitions, 46 changer transitions 5/380 dead transitions. [2024-06-27 23:10:28,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 380 transitions, 5237 flow [2024-06-27 23:10:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:10:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 23:10:28,793 INFO L175 Difference]: Start difference. First operand has 322 places, 345 transitions, 4267 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:10:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 380 transitions, 5237 flow [2024-06-27 23:10:31,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 380 transitions, 5075 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:31,667 INFO L231 Difference]: Finished difference. Result has 324 places, 347 transitions, 4252 flow [2024-06-27 23:10:31,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4105, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4252, PETRI_PLACES=324, PETRI_TRANSITIONS=347} [2024-06-27 23:10:31,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-27 23:10:31,668 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 347 transitions, 4252 flow [2024-06-27 23:10:31,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:31,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:31,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:31,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 23:10:31,668 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:31,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -37206209, now seen corresponding path program 2 times [2024-06-27 23:10:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:31,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503882461] [2024-06-27 23:10:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:31,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:31,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503882461] [2024-06-27 23:10:31,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503882461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:31,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:31,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954281439] [2024-06-27 23:10:31,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:31,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:31,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:31,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:31,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 347 transitions, 4252 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:31,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:31,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:31,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:32,764 INFO L124 PetriNetUnfolderBase]: 2625/4470 cut-off events. [2024-06-27 23:10:32,764 INFO L125 PetriNetUnfolderBase]: For 452317/452323 co-relation queries the response was YES. [2024-06-27 23:10:32,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32480 conditions, 4470 events. 2625/4470 cut-off events. For 452317/452323 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29300 event pairs, 712 based on Foata normal form. 11/4476 useless extension candidates. Maximal degree in co-relation 32320. Up to 3998 conditions per place. [2024-06-27 23:10:32,819 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 323 selfloop transitions, 40 changer transitions 0/370 dead transitions. [2024-06-27 23:10:32,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 370 transitions, 5110 flow [2024-06-27 23:10:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 23:10:32,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 23:10:32,820 INFO L175 Difference]: Start difference. First operand has 324 places, 347 transitions, 4252 flow. Second operand 8 states and 178 transitions. [2024-06-27 23:10:32,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 370 transitions, 5110 flow [2024-06-27 23:10:35,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 370 transitions, 4993 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:35,319 INFO L231 Difference]: Finished difference. Result has 327 places, 351 transitions, 4306 flow [2024-06-27 23:10:35,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4306, PETRI_PLACES=327, PETRI_TRANSITIONS=351} [2024-06-27 23:10:35,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-27 23:10:35,319 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 351 transitions, 4306 flow [2024-06-27 23:10:35,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:35,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:35,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:35,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 23:10:35,319 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:35,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash -28009439, now seen corresponding path program 3 times [2024-06-27 23:10:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556215031] [2024-06-27 23:10:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:35,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:35,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:35,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556215031] [2024-06-27 23:10:35,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556215031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:35,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:35,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:35,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895923208] [2024-06-27 23:10:35,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:35,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:35,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:35,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:35,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:35,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 351 transitions, 4306 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:35,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:35,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:35,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:36,388 INFO L124 PetriNetUnfolderBase]: 2645/4498 cut-off events. [2024-06-27 23:10:36,388 INFO L125 PetriNetUnfolderBase]: For 453193/453199 co-relation queries the response was YES. [2024-06-27 23:10:36,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32557 conditions, 4498 events. 2645/4498 cut-off events. For 453193/453199 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29433 event pairs, 667 based on Foata normal form. 11/4504 useless extension candidates. Maximal degree in co-relation 32396. Up to 3958 conditions per place. [2024-06-27 23:10:36,443 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 320 selfloop transitions, 48 changer transitions 0/375 dead transitions. [2024-06-27 23:10:36,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 375 transitions, 5174 flow [2024-06-27 23:10:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 23:10:36,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 23:10:36,444 INFO L175 Difference]: Start difference. First operand has 327 places, 351 transitions, 4306 flow. Second operand 8 states and 183 transitions. [2024-06-27 23:10:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 375 transitions, 5174 flow [2024-06-27 23:10:39,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 375 transitions, 5059 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 23:10:39,031 INFO L231 Difference]: Finished difference. Result has 330 places, 352 transitions, 4323 flow [2024-06-27 23:10:39,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4323, PETRI_PLACES=330, PETRI_TRANSITIONS=352} [2024-06-27 23:10:39,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 23:10:39,031 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 352 transitions, 4323 flow [2024-06-27 23:10:39,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:39,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:39,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 23:10:39,032 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:39,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1583459885, now seen corresponding path program 4 times [2024-06-27 23:10:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:39,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188304685] [2024-06-27 23:10:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:39,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:39,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188304685] [2024-06-27 23:10:39,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188304685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:39,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:39,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585919803] [2024-06-27 23:10:39,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:39,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:39,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:39,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 352 transitions, 4323 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:39,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:39,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:39,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:39,996 INFO L124 PetriNetUnfolderBase]: 2665/4527 cut-off events. [2024-06-27 23:10:39,996 INFO L125 PetriNetUnfolderBase]: For 462913/462918 co-relation queries the response was YES. [2024-06-27 23:10:40,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32823 conditions, 4527 events. 2665/4527 cut-off events. For 462913/462918 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29601 event pairs, 685 based on Foata normal form. 8/4529 useless extension candidates. Maximal degree in co-relation 32661. Up to 3826 conditions per place. [2024-06-27 23:10:40,058 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 62 changer transitions 0/378 dead transitions. [2024-06-27 23:10:40,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 378 transitions, 5217 flow [2024-06-27 23:10:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:10:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:10:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 23:10:40,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 23:10:40,058 INFO L175 Difference]: Start difference. First operand has 330 places, 352 transitions, 4323 flow. Second operand 8 states and 186 transitions. [2024-06-27 23:10:40,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 378 transitions, 5217 flow [2024-06-27 23:10:42,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 378 transitions, 5061 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 23:10:42,620 INFO L231 Difference]: Finished difference. Result has 331 places, 353 transitions, 4329 flow [2024-06-27 23:10:42,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4329, PETRI_PLACES=331, PETRI_TRANSITIONS=353} [2024-06-27 23:10:42,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 23:10:42,620 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 353 transitions, 4329 flow [2024-06-27 23:10:42,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:42,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:42,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:42,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 23:10:42,621 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:42,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1030698507, now seen corresponding path program 17 times [2024-06-27 23:10:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:42,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662560248] [2024-06-27 23:10:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:42,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:42,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662560248] [2024-06-27 23:10:42,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662560248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:42,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:42,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:42,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098551028] [2024-06-27 23:10:42,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:42,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:42,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:42,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:42,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 353 transitions, 4329 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:42,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:42,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:42,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:43,719 INFO L124 PetriNetUnfolderBase]: 2853/4831 cut-off events. [2024-06-27 23:10:43,719 INFO L125 PetriNetUnfolderBase]: For 659009/659015 co-relation queries the response was YES. [2024-06-27 23:10:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38286 conditions, 4831 events. 2853/4831 cut-off events. For 659009/659015 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 31833 event pairs, 840 based on Foata normal form. 13/4836 useless extension candidates. Maximal degree in co-relation 38125. Up to 3764 conditions per place. [2024-06-27 23:10:43,891 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 202 selfloop transitions, 192 changer transitions 0/401 dead transitions. [2024-06-27 23:10:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 401 transitions, 5631 flow [2024-06-27 23:10:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:43,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-27 23:10:43,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-27 23:10:43,901 INFO L175 Difference]: Start difference. First operand has 331 places, 353 transitions, 4329 flow. Second operand 10 states and 246 transitions. [2024-06-27 23:10:43,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 401 transitions, 5631 flow [2024-06-27 23:10:46,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 401 transitions, 5479 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:46,775 INFO L231 Difference]: Finished difference. Result has 335 places, 355 transitions, 4683 flow [2024-06-27 23:10:46,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4683, PETRI_PLACES=335, PETRI_TRANSITIONS=355} [2024-06-27 23:10:46,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-27 23:10:46,776 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 355 transitions, 4683 flow [2024-06-27 23:10:46,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:46,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:46,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 23:10:46,776 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:46,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1022127627, now seen corresponding path program 18 times [2024-06-27 23:10:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:46,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081659054] [2024-06-27 23:10:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:46,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:46,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:46,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081659054] [2024-06-27 23:10:46,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081659054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:46,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:46,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:46,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909179283] [2024-06-27 23:10:46,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:46,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:46,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:47,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:47,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 355 transitions, 4683 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:47,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:47,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:47,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:47,946 INFO L124 PetriNetUnfolderBase]: 2881/4879 cut-off events. [2024-06-27 23:10:47,946 INFO L125 PetriNetUnfolderBase]: For 676718/676724 co-relation queries the response was YES. [2024-06-27 23:10:47,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39112 conditions, 4879 events. 2881/4879 cut-off events. For 676718/676724 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32328 event pairs, 864 based on Foata normal form. 13/4884 useless extension candidates. Maximal degree in co-relation 38950. Up to 4191 conditions per place. [2024-06-27 23:10:48,009 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 191 changer transitions 0/392 dead transitions. [2024-06-27 23:10:48,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 392 transitions, 5635 flow [2024-06-27 23:10:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:10:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:10:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-27 23:10:48,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-27 23:10:48,010 INFO L175 Difference]: Start difference. First operand has 335 places, 355 transitions, 4683 flow. Second operand 10 states and 237 transitions. [2024-06-27 23:10:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 392 transitions, 5635 flow [2024-06-27 23:10:51,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 392 transitions, 5327 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:10:51,107 INFO L231 Difference]: Finished difference. Result has 339 places, 356 transitions, 4824 flow [2024-06-27 23:10:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4824, PETRI_PLACES=339, PETRI_TRANSITIONS=356} [2024-06-27 23:10:51,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-27 23:10:51,107 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 356 transitions, 4824 flow [2024-06-27 23:10:51,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:51,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:51,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 23:10:51,108 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:51,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -735240297, now seen corresponding path program 19 times [2024-06-27 23:10:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:51,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79001855] [2024-06-27 23:10:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:51,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79001855] [2024-06-27 23:10:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79001855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:51,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:51,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250253658] [2024-06-27 23:10:51,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:51,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:51,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 356 transitions, 4824 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:51,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:51,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:51,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:52,219 INFO L124 PetriNetUnfolderBase]: 2909/4923 cut-off events. [2024-06-27 23:10:52,219 INFO L125 PetriNetUnfolderBase]: For 683955/683961 co-relation queries the response was YES. [2024-06-27 23:10:52,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39581 conditions, 4923 events. 2909/4923 cut-off events. For 683955/683961 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32639 event pairs, 868 based on Foata normal form. 13/4928 useless extension candidates. Maximal degree in co-relation 39417. Up to 4235 conditions per place. [2024-06-27 23:10:52,287 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 196 selfloop transitions, 192 changer transitions 0/395 dead transitions. [2024-06-27 23:10:52,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 395 transitions, 5778 flow [2024-06-27 23:10:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:10:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:10:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-27 23:10:52,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 23:10:52,288 INFO L175 Difference]: Start difference. First operand has 339 places, 356 transitions, 4824 flow. Second operand 12 states and 273 transitions. [2024-06-27 23:10:52,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 395 transitions, 5778 flow [2024-06-27 23:10:55,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 395 transitions, 5361 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 23:10:55,637 INFO L231 Difference]: Finished difference. Result has 343 places, 357 transitions, 4850 flow [2024-06-27 23:10:55,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4850, PETRI_PLACES=343, PETRI_TRANSITIONS=357} [2024-06-27 23:10:55,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-27 23:10:55,638 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 357 transitions, 4850 flow [2024-06-27 23:10:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:55,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:10:55,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:10:55,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 23:10:55,638 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:10:55,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:10:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2115207317, now seen corresponding path program 20 times [2024-06-27 23:10:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:10:55,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745183460] [2024-06-27 23:10:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:10:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:10:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:10:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:10:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:10:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745183460] [2024-06-27 23:10:55,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745183460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:10:55,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:10:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:10:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806078386] [2024-06-27 23:10:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:10:55,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:10:55,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:10:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:10:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:10:55,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:10:55,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 357 transitions, 4850 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:10:55,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:10:55,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:10:55,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:10:57,005 INFO L124 PetriNetUnfolderBase]: 2937/4963 cut-off events. [2024-06-27 23:10:57,006 INFO L125 PetriNetUnfolderBase]: For 698013/698019 co-relation queries the response was YES. [2024-06-27 23:10:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40000 conditions, 4963 events. 2937/4963 cut-off events. For 698013/698019 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 32869 event pairs, 868 based on Foata normal form. 13/4968 useless extension candidates. Maximal degree in co-relation 39835. Up to 4279 conditions per place. [2024-06-27 23:10:57,070 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 189 selfloop transitions, 193 changer transitions 0/389 dead transitions. [2024-06-27 23:10:57,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 389 transitions, 5776 flow [2024-06-27 23:10:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:10:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:10:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-27 23:10:57,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-27 23:10:57,071 INFO L175 Difference]: Start difference. First operand has 343 places, 357 transitions, 4850 flow. Second operand 11 states and 246 transitions. [2024-06-27 23:10:57,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 389 transitions, 5776 flow [2024-06-27 23:11:00,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 389 transitions, 5355 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 23:11:00,127 INFO L231 Difference]: Finished difference. Result has 344 places, 358 transitions, 4876 flow [2024-06-27 23:11:00,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4876, PETRI_PLACES=344, PETRI_TRANSITIONS=358} [2024-06-27 23:11:00,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-27 23:11:00,127 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 358 transitions, 4876 flow [2024-06-27 23:11:00,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:00,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:00,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:00,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 23:11:00,128 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:00,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1133839197, now seen corresponding path program 28 times [2024-06-27 23:11:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:00,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479442825] [2024-06-27 23:11:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:00,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:00,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479442825] [2024-06-27 23:11:00,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479442825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:00,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:00,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:00,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911886175] [2024-06-27 23:11:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:00,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:00,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:00,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:00,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 358 transitions, 4876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:00,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:00,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:01,300 INFO L124 PetriNetUnfolderBase]: 3041/5142 cut-off events. [2024-06-27 23:11:01,301 INFO L125 PetriNetUnfolderBase]: For 853352/853358 co-relation queries the response was YES. [2024-06-27 23:11:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40897 conditions, 5142 events. 3041/5142 cut-off events. For 853352/853358 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34317 event pairs, 894 based on Foata normal form. 39/5176 useless extension candidates. Maximal degree in co-relation 40731. Up to 4405 conditions per place. [2024-06-27 23:11:01,369 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 298 selfloop transitions, 79 changer transitions 3/387 dead transitions. [2024-06-27 23:11:01,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 387 transitions, 5786 flow [2024-06-27 23:11:01,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 23:11:01,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 23:11:01,370 INFO L175 Difference]: Start difference. First operand has 344 places, 358 transitions, 4876 flow. Second operand 9 states and 212 transitions. [2024-06-27 23:11:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 387 transitions, 5786 flow [2024-06-27 23:11:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 387 transitions, 5361 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:05,060 INFO L231 Difference]: Finished difference. Result has 344 places, 358 transitions, 4645 flow [2024-06-27 23:11:05,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4645, PETRI_PLACES=344, PETRI_TRANSITIONS=358} [2024-06-27 23:11:05,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-27 23:11:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 358 transitions, 4645 flow [2024-06-27 23:11:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:05,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 23:11:05,061 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:05,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash 103784407, now seen corresponding path program 21 times [2024-06-27 23:11:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:05,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154330715] [2024-06-27 23:11:05,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:05,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154330715] [2024-06-27 23:11:05,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154330715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:05,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:05,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458059641] [2024-06-27 23:11:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:05,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:05,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:05,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 358 transitions, 4645 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:05,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:05,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:06,267 INFO L124 PetriNetUnfolderBase]: 3089/5230 cut-off events. [2024-06-27 23:11:06,267 INFO L125 PetriNetUnfolderBase]: For 820378/820384 co-relation queries the response was YES. [2024-06-27 23:11:06,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39916 conditions, 5230 events. 3089/5230 cut-off events. For 820378/820384 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35068 event pairs, 908 based on Foata normal form. 39/5264 useless extension candidates. Maximal degree in co-relation 39749. Up to 4433 conditions per place. [2024-06-27 23:11:06,342 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 78 changer transitions 3/395 dead transitions. [2024-06-27 23:11:06,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 395 transitions, 5561 flow [2024-06-27 23:11:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 23:11:06,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 23:11:06,343 INFO L175 Difference]: Start difference. First operand has 344 places, 358 transitions, 4645 flow. Second operand 9 states and 221 transitions. [2024-06-27 23:11:06,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 395 transitions, 5561 flow [2024-06-27 23:11:10,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 395 transitions, 5379 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:10,114 INFO L231 Difference]: Finished difference. Result has 346 places, 357 transitions, 4617 flow [2024-06-27 23:11:10,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4617, PETRI_PLACES=346, PETRI_TRANSITIONS=357} [2024-06-27 23:11:10,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-27 23:11:10,114 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 357 transitions, 4617 flow [2024-06-27 23:11:10,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:10,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:10,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 23:11:10,115 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:10,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash 817276095, now seen corresponding path program 29 times [2024-06-27 23:11:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551505811] [2024-06-27 23:11:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:10,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551505811] [2024-06-27 23:11:10,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551505811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:10,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:10,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429419532] [2024-06-27 23:11:10,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:10,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:10,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 357 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:10,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:10,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:10,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:11,314 INFO L124 PetriNetUnfolderBase]: 3107/5260 cut-off events. [2024-06-27 23:11:11,314 INFO L125 PetriNetUnfolderBase]: For 684542/684548 co-relation queries the response was YES. [2024-06-27 23:11:11,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40137 conditions, 5260 events. 3107/5260 cut-off events. For 684542/684548 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35340 event pairs, 924 based on Foata normal form. 13/5268 useless extension candidates. Maximal degree in co-relation 39969. Up to 4737 conditions per place. [2024-06-27 23:11:11,384 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 73 changer transitions 0/379 dead transitions. [2024-06-27 23:11:11,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 379 transitions, 5475 flow [2024-06-27 23:11:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:11:11,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 23:11:11,385 INFO L175 Difference]: Start difference. First operand has 346 places, 357 transitions, 4617 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:11:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 379 transitions, 5475 flow [2024-06-27 23:11:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 379 transitions, 5258 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:14,885 INFO L231 Difference]: Finished difference. Result has 347 places, 358 transitions, 4589 flow [2024-06-27 23:11:14,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4400, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4589, PETRI_PLACES=347, PETRI_TRANSITIONS=358} [2024-06-27 23:11:14,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 23:11:14,886 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 358 transitions, 4589 flow [2024-06-27 23:11:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:14,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:14,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:14,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 23:11:14,887 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:14,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2017681251, now seen corresponding path program 30 times [2024-06-27 23:11:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:14,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812189761] [2024-06-27 23:11:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:14,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812189761] [2024-06-27 23:11:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812189761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:14,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:14,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032341513] [2024-06-27 23:11:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:15,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:15,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 358 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:15,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:15,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:15,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:16,091 INFO L124 PetriNetUnfolderBase]: 3135/5297 cut-off events. [2024-06-27 23:11:16,091 INFO L125 PetriNetUnfolderBase]: For 682075/682080 co-relation queries the response was YES. [2024-06-27 23:11:16,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40155 conditions, 5297 events. 3135/5297 cut-off events. For 682075/682080 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35575 event pairs, 941 based on Foata normal form. 10/5301 useless extension candidates. Maximal degree in co-relation 39987. Up to 4664 conditions per place. [2024-06-27 23:11:16,162 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 122 changer transitions 0/379 dead transitions. [2024-06-27 23:11:16,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 379 transitions, 5447 flow [2024-06-27 23:11:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 23:11:16,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 23:11:16,162 INFO L175 Difference]: Start difference. First operand has 347 places, 358 transitions, 4589 flow. Second operand 9 states and 203 transitions. [2024-06-27 23:11:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 379 transitions, 5447 flow [2024-06-27 23:11:20,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 379 transitions, 5272 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:20,534 INFO L231 Difference]: Finished difference. Result has 348 places, 359 transitions, 4703 flow [2024-06-27 23:11:20,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4703, PETRI_PLACES=348, PETRI_TRANSITIONS=359} [2024-06-27 23:11:20,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-27 23:11:20,534 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 359 transitions, 4703 flow [2024-06-27 23:11:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:20,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:20,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 23:11:20,534 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:20,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:20,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1902390081, now seen corresponding path program 31 times [2024-06-27 23:11:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:20,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716728721] [2024-06-27 23:11:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:20,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:20,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716728721] [2024-06-27 23:11:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716728721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:20,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324106770] [2024-06-27 23:11:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:20,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:20,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:20,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 359 transitions, 4703 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:20,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:20,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:20,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:21,732 INFO L124 PetriNetUnfolderBase]: 3163/5348 cut-off events. [2024-06-27 23:11:21,732 INFO L125 PetriNetUnfolderBase]: For 695013/695019 co-relation queries the response was YES. [2024-06-27 23:11:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40634 conditions, 5348 events. 3163/5348 cut-off events. For 695013/695019 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35985 event pairs, 934 based on Foata normal form. 13/5356 useless extension candidates. Maximal degree in co-relation 40465. Up to 4828 conditions per place. [2024-06-27 23:11:21,973 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 302 selfloop transitions, 71 changer transitions 0/380 dead transitions. [2024-06-27 23:11:21,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 380 transitions, 5565 flow [2024-06-27 23:11:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 23:11:21,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 23:11:21,975 INFO L175 Difference]: Start difference. First operand has 348 places, 359 transitions, 4703 flow. Second operand 9 states and 199 transitions. [2024-06-27 23:11:21,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 380 transitions, 5565 flow [2024-06-27 23:11:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 380 transitions, 5290 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:25,401 INFO L231 Difference]: Finished difference. Result has 350 places, 360 transitions, 4617 flow [2024-06-27 23:11:25,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4617, PETRI_PLACES=350, PETRI_TRANSITIONS=360} [2024-06-27 23:11:25,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 23:11:25,402 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 360 transitions, 4617 flow [2024-06-27 23:11:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:25,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:25,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:25,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 23:11:25,402 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:25,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2020538211, now seen corresponding path program 32 times [2024-06-27 23:11:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:25,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951723940] [2024-06-27 23:11:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951723940] [2024-06-27 23:11:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951723940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:25,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:25,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177666540] [2024-06-27 23:11:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:25,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:25,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:25,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 360 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:25,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:25,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:26,540 INFO L124 PetriNetUnfolderBase]: 3178/5370 cut-off events. [2024-06-27 23:11:26,540 INFO L125 PetriNetUnfolderBase]: For 692915/692920 co-relation queries the response was YES. [2024-06-27 23:11:26,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40411 conditions, 5370 events. 3178/5370 cut-off events. For 692915/692920 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 36095 event pairs, 946 based on Foata normal form. 10/5374 useless extension candidates. Maximal degree in co-relation 40241. Up to 4441 conditions per place. [2024-06-27 23:11:26,613 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 126 changer transitions 2/387 dead transitions. [2024-06-27 23:11:26,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 387 transitions, 5557 flow [2024-06-27 23:11:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:11:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:11:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 23:11:26,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 23:11:26,613 INFO L175 Difference]: Start difference. First operand has 350 places, 360 transitions, 4617 flow. Second operand 9 states and 208 transitions. [2024-06-27 23:11:26,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 387 transitions, 5557 flow [2024-06-27 23:11:31,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 387 transitions, 5382 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:31,109 INFO L231 Difference]: Finished difference. Result has 352 places, 361 transitions, 4742 flow [2024-06-27 23:11:31,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4742, PETRI_PLACES=352, PETRI_TRANSITIONS=361} [2024-06-27 23:11:31,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-27 23:11:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 361 transitions, 4742 flow [2024-06-27 23:11:31,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:31,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:31,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 23:11:31,110 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:31,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -823889385, now seen corresponding path program 4 times [2024-06-27 23:11:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:31,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556992374] [2024-06-27 23:11:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:31,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:31,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556992374] [2024-06-27 23:11:31,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556992374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:31,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:31,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:31,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669957151] [2024-06-27 23:11:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:31,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:31,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 361 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:31,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:31,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:32,497 INFO L124 PetriNetUnfolderBase]: 3353/5667 cut-off events. [2024-06-27 23:11:32,497 INFO L125 PetriNetUnfolderBase]: For 882799/882805 co-relation queries the response was YES. [2024-06-27 23:11:32,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45837 conditions, 5667 events. 3353/5667 cut-off events. For 882799/882805 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 38436 event pairs, 968 based on Foata normal form. 11/5666 useless extension candidates. Maximal degree in co-relation 45666. Up to 3976 conditions per place. [2024-06-27 23:11:32,573 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 202 changer transitions 0/421 dead transitions. [2024-06-27 23:11:32,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 421 transitions, 6394 flow [2024-06-27 23:11:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-06-27 23:11:32,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204545454545455 [2024-06-27 23:11:32,574 INFO L175 Difference]: Start difference. First operand has 352 places, 361 transitions, 4742 flow. Second operand 11 states and 273 transitions. [2024-06-27 23:11:32,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 421 transitions, 6394 flow [2024-06-27 23:11:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 421 transitions, 6106 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:36,497 INFO L231 Difference]: Finished difference. Result has 357 places, 365 transitions, 5034 flow [2024-06-27 23:11:36,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5034, PETRI_PLACES=357, PETRI_TRANSITIONS=365} [2024-06-27 23:11:36,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 23:11:36,498 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 365 transitions, 5034 flow [2024-06-27 23:11:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:36,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:36,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 23:11:36,498 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:36,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:36,498 INFO L85 PathProgramCache]: Analyzing trace with hash -823590855, now seen corresponding path program 5 times [2024-06-27 23:11:36,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:36,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858953600] [2024-06-27 23:11:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:36,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858953600] [2024-06-27 23:11:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858953600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:36,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021229277] [2024-06-27 23:11:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:36,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:36,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:36,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 365 transitions, 5034 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:36,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:36,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:36,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:37,900 INFO L124 PetriNetUnfolderBase]: 3373/5697 cut-off events. [2024-06-27 23:11:37,900 INFO L125 PetriNetUnfolderBase]: For 903034/903040 co-relation queries the response was YES. [2024-06-27 23:11:37,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 5697 events. 3373/5697 cut-off events. For 903034/903040 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38701 event pairs, 1046 based on Foata normal form. 11/5696 useless extension candidates. Maximal degree in co-relation 46341. Up to 3988 conditions per place. [2024-06-27 23:11:37,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 207 selfloop transitions, 202 changer transitions 0/416 dead transitions. [2024-06-27 23:11:37,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 416 transitions, 6354 flow [2024-06-27 23:11:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:11:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:11:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 23:11:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-27 23:11:37,975 INFO L175 Difference]: Start difference. First operand has 357 places, 365 transitions, 5034 flow. Second operand 11 states and 267 transitions. [2024-06-27 23:11:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 416 transitions, 6354 flow [2024-06-27 23:11:42,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 416 transitions, 5888 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 23:11:42,035 INFO L231 Difference]: Finished difference. Result has 360 places, 366 transitions, 5038 flow [2024-06-27 23:11:42,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5038, PETRI_PLACES=360, PETRI_TRANSITIONS=366} [2024-06-27 23:11:42,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-27 23:11:42,036 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 366 transitions, 5038 flow [2024-06-27 23:11:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:42,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:42,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 23:11:42,036 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:42,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1796405399, now seen corresponding path program 6 times [2024-06-27 23:11:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:42,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791652908] [2024-06-27 23:11:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:42,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791652908] [2024-06-27 23:11:42,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791652908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:42,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:42,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:42,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715041757] [2024-06-27 23:11:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:42,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:42,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:42,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:42,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 366 transitions, 5038 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:42,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:43,457 INFO L124 PetriNetUnfolderBase]: 3401/5753 cut-off events. [2024-06-27 23:11:43,457 INFO L125 PetriNetUnfolderBase]: For 910789/910795 co-relation queries the response was YES. [2024-06-27 23:11:43,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46678 conditions, 5753 events. 3401/5753 cut-off events. For 910789/910795 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 39288 event pairs, 1086 based on Foata normal form. 11/5754 useless extension candidates. Maximal degree in co-relation 46505. Up to 4977 conditions per place. [2024-06-27 23:11:43,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 194 changer transitions 0/410 dead transitions. [2024-06-27 23:11:43,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 410 transitions, 6071 flow [2024-06-27 23:11:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:11:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:11:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-27 23:11:43,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2024-06-27 23:11:43,530 INFO L175 Difference]: Start difference. First operand has 360 places, 366 transitions, 5038 flow. Second operand 12 states and 275 transitions. [2024-06-27 23:11:43,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 410 transitions, 6071 flow [2024-06-27 23:11:48,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 410 transitions, 5662 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 23:11:48,367 INFO L231 Difference]: Finished difference. Result has 366 places, 369 transitions, 5117 flow [2024-06-27 23:11:48,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4631, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5117, PETRI_PLACES=366, PETRI_TRANSITIONS=369} [2024-06-27 23:11:48,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 23:11:48,367 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 369 transitions, 5117 flow [2024-06-27 23:11:48,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:48,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:48,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:48,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 23:11:48,367 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:48,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1108126231, now seen corresponding path program 7 times [2024-06-27 23:11:48,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:48,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498568411] [2024-06-27 23:11:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:48,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498568411] [2024-06-27 23:11:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498568411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:48,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:48,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312696136] [2024-06-27 23:11:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:48,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:48,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 369 transitions, 5117 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:48,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:49,958 INFO L124 PetriNetUnfolderBase]: 3662/6198 cut-off events. [2024-06-27 23:11:49,958 INFO L125 PetriNetUnfolderBase]: For 1250630/1250636 co-relation queries the response was YES. [2024-06-27 23:11:50,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54639 conditions, 6198 events. 3662/6198 cut-off events. For 1250630/1250636 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 42762 event pairs, 1067 based on Foata normal form. 11/6201 useless extension candidates. Maximal degree in co-relation 54464. Up to 3008 conditions per place. [2024-06-27 23:11:50,049 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 194 selfloop transitions, 225 changer transitions 0/426 dead transitions. [2024-06-27 23:11:50,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 426 transitions, 6751 flow [2024-06-27 23:11:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 23:11:50,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325 [2024-06-27 23:11:50,050 INFO L175 Difference]: Start difference. First operand has 366 places, 369 transitions, 5117 flow. Second operand 10 states and 253 transitions. [2024-06-27 23:11:50,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 426 transitions, 6751 flow [2024-06-27 23:11:55,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 426 transitions, 6334 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 23:11:55,323 INFO L231 Difference]: Finished difference. Result has 367 places, 370 transitions, 5214 flow [2024-06-27 23:11:55,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4700, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5214, PETRI_PLACES=367, PETRI_TRANSITIONS=370} [2024-06-27 23:11:55,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 23:11:55,324 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 370 transitions, 5214 flow [2024-06-27 23:11:55,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:55,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:11:55,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:11:55,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 23:11:55,324 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:11:55,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:11:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1108424761, now seen corresponding path program 8 times [2024-06-27 23:11:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:11:55,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799443629] [2024-06-27 23:11:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:11:55,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:11:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:11:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:11:55,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:11:55,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799443629] [2024-06-27 23:11:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799443629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:11:55,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:11:55,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:11:55,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824331124] [2024-06-27 23:11:55,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:11:55,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:11:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:11:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:11:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:11:55,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:11:55,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 370 transitions, 5214 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:11:55,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:11:55,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:11:55,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:11:56,915 INFO L124 PetriNetUnfolderBase]: 3690/6246 cut-off events. [2024-06-27 23:11:56,916 INFO L125 PetriNetUnfolderBase]: For 1275167/1275173 co-relation queries the response was YES. [2024-06-27 23:11:56,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55487 conditions, 6246 events. 3690/6246 cut-off events. For 1275167/1275173 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 43143 event pairs, 1065 based on Foata normal form. 11/6249 useless extension candidates. Maximal degree in co-relation 55311. Up to 3024 conditions per place. [2024-06-27 23:11:57,000 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 193 selfloop transitions, 225 changer transitions 0/425 dead transitions. [2024-06-27 23:11:57,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 425 transitions, 6842 flow [2024-06-27 23:11:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:11:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:11:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 23:11:57,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225 [2024-06-27 23:11:57,001 INFO L175 Difference]: Start difference. First operand has 367 places, 370 transitions, 5214 flow. Second operand 10 states and 249 transitions. [2024-06-27 23:11:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 425 transitions, 6842 flow [2024-06-27 23:12:02,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 425 transitions, 6024 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-27 23:12:02,667 INFO L231 Difference]: Finished difference. Result has 367 places, 373 transitions, 4941 flow [2024-06-27 23:12:02,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4941, PETRI_PLACES=367, PETRI_TRANSITIONS=373} [2024-06-27 23:12:02,667 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 23:12:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 373 transitions, 4941 flow [2024-06-27 23:12:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:02,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 23:12:02,667 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:02,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1462687801, now seen corresponding path program 9 times [2024-06-27 23:12:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:02,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200917421] [2024-06-27 23:12:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200917421] [2024-06-27 23:12:02,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200917421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:02,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:02,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:02,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155315398] [2024-06-27 23:12:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:02,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:02,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:02,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:02,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 373 transitions, 4941 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:02,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:02,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:02,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:04,176 INFO L124 PetriNetUnfolderBase]: 3710/6282 cut-off events. [2024-06-27 23:12:04,177 INFO L125 PetriNetUnfolderBase]: For 1291605/1291611 co-relation queries the response was YES. [2024-06-27 23:12:04,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54538 conditions, 6282 events. 3710/6282 cut-off events. For 1291605/1291611 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 43518 event pairs, 1092 based on Foata normal form. 11/6285 useless extension candidates. Maximal degree in co-relation 54365. Up to 3036 conditions per place. [2024-06-27 23:12:04,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 180 selfloop transitions, 231 changer transitions 0/418 dead transitions. [2024-06-27 23:12:04,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 418 transitions, 6246 flow [2024-06-27 23:12:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:12:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:12:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 23:12:04,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-27 23:12:04,259 INFO L175 Difference]: Start difference. First operand has 367 places, 373 transitions, 4941 flow. Second operand 10 states and 241 transitions. [2024-06-27 23:12:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 418 transitions, 6246 flow [2024-06-27 23:12:09,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 418 transitions, 5772 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 23:12:09,790 INFO L231 Difference]: Finished difference. Result has 371 places, 374 transitions, 4984 flow [2024-06-27 23:12:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4468, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4984, PETRI_PLACES=371, PETRI_TRANSITIONS=374} [2024-06-27 23:12:09,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 23:12:09,790 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 374 transitions, 4984 flow [2024-06-27 23:12:09,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:09,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:09,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:09,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 23:12:09,790 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:09,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:09,791 INFO L85 PathProgramCache]: Analyzing trace with hash 675037241, now seen corresponding path program 10 times [2024-06-27 23:12:09,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:09,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254722642] [2024-06-27 23:12:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:09,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:09,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:09,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254722642] [2024-06-27 23:12:09,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254722642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:09,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:09,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:09,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885709809] [2024-06-27 23:12:09,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:09,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:09,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:09,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:09,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 374 transitions, 4984 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:09,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:11,349 INFO L124 PetriNetUnfolderBase]: 3763/6361 cut-off events. [2024-06-27 23:12:11,349 INFO L125 PetriNetUnfolderBase]: For 1357769/1357775 co-relation queries the response was YES. [2024-06-27 23:12:11,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56269 conditions, 6361 events. 3763/6361 cut-off events. For 1357769/1357775 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44227 event pairs, 1282 based on Foata normal form. 11/6356 useless extension candidates. Maximal degree in co-relation 56095. Up to 5320 conditions per place. [2024-06-27 23:12:11,436 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 206 changer transitions 0/412 dead transitions. [2024-06-27 23:12:11,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 412 transitions, 6266 flow [2024-06-27 23:12:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:12:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:12:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-27 23:12:11,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-27 23:12:11,437 INFO L175 Difference]: Start difference. First operand has 371 places, 374 transitions, 4984 flow. Second operand 11 states and 250 transitions. [2024-06-27 23:12:11,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 412 transitions, 6266 flow [2024-06-27 23:12:17,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 412 transitions, 5854 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 23:12:17,562 INFO L231 Difference]: Finished difference. Result has 376 places, 376 transitions, 5128 flow [2024-06-27 23:12:17,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5128, PETRI_PLACES=376, PETRI_TRANSITIONS=376} [2024-06-27 23:12:17,562 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-27 23:12:17,562 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 376 transitions, 5128 flow [2024-06-27 23:12:17,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:17,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:17,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:17,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 23:12:17,563 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash 675037613, now seen corresponding path program 4 times [2024-06-27 23:12:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306051365] [2024-06-27 23:12:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:17,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:17,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:17,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306051365] [2024-06-27 23:12:17,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306051365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:17,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:17,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:17,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494368254] [2024-06-27 23:12:17,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:17,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:17,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:17,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:17,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 376 transitions, 5128 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:17,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:19,049 INFO L124 PetriNetUnfolderBase]: 3783/6395 cut-off events. [2024-06-27 23:12:19,049 INFO L125 PetriNetUnfolderBase]: For 1380933/1380939 co-relation queries the response was YES. [2024-06-27 23:12:19,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56595 conditions, 6395 events. 3783/6395 cut-off events. For 1380933/1380939 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 44528 event pairs, 1282 based on Foata normal form. 11/6392 useless extension candidates. Maximal degree in co-relation 56420. Up to 5776 conditions per place. [2024-06-27 23:12:19,139 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 293 selfloop transitions, 97 changer transitions 0/397 dead transitions. [2024-06-27 23:12:19,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 397 transitions, 6014 flow [2024-06-27 23:12:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 23:12:19,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-27 23:12:19,140 INFO L175 Difference]: Start difference. First operand has 376 places, 376 transitions, 5128 flow. Second operand 8 states and 179 transitions. [2024-06-27 23:12:19,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 397 transitions, 6014 flow [2024-06-27 23:12:24,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 397 transitions, 5597 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:12:24,060 INFO L231 Difference]: Finished difference. Result has 377 places, 377 transitions, 4955 flow [2024-06-27 23:12:24,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4955, PETRI_PLACES=377, PETRI_TRANSITIONS=377} [2024-06-27 23:12:24,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 23:12:24,060 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 377 transitions, 4955 flow [2024-06-27 23:12:24,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:24,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:24,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:24,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 23:12:24,061 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:24,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2114992115, now seen corresponding path program 11 times [2024-06-27 23:12:24,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:24,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453472893] [2024-06-27 23:12:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:24,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:24,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453472893] [2024-06-27 23:12:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453472893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:24,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:24,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:24,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027282464] [2024-06-27 23:12:24,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:24,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:24,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:24,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:24,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:24,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 377 transitions, 4955 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:24,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:24,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:24,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:25,527 INFO L124 PetriNetUnfolderBase]: 3770/6386 cut-off events. [2024-06-27 23:12:25,527 INFO L125 PetriNetUnfolderBase]: For 1356447/1356453 co-relation queries the response was YES. [2024-06-27 23:12:25,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55337 conditions, 6386 events. 3770/6386 cut-off events. For 1356447/1356453 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44593 event pairs, 1291 based on Foata normal form. 11/6389 useless extension candidates. Maximal degree in co-relation 55161. Up to 5604 conditions per place. [2024-06-27 23:12:25,622 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 194 changer transitions 0/412 dead transitions. [2024-06-27 23:12:25,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 412 transitions, 5895 flow [2024-06-27 23:12:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:12:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:12:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-27 23:12:25,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-27 23:12:25,623 INFO L175 Difference]: Start difference. First operand has 377 places, 377 transitions, 4955 flow. Second operand 12 states and 266 transitions. [2024-06-27 23:12:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 412 transitions, 5895 flow [2024-06-27 23:12:31,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 412 transitions, 5643 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 23:12:31,858 INFO L231 Difference]: Finished difference. Result has 384 places, 377 transitions, 5095 flow [2024-06-27 23:12:31,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4703, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5095, PETRI_PLACES=384, PETRI_TRANSITIONS=377} [2024-06-27 23:12:31,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 23:12:31,858 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 377 transitions, 5095 flow [2024-06-27 23:12:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:31,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:31,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:31,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 23:12:31,858 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:31,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:31,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1134023895, now seen corresponding path program 5 times [2024-06-27 23:12:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:31,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500316580] [2024-06-27 23:12:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:31,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:31,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:31,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500316580] [2024-06-27 23:12:31,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500316580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:31,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:31,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:31,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861418292] [2024-06-27 23:12:31,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:31,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:31,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:31,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:32,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:32,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 377 transitions, 5095 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:32,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:32,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:32,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:33,269 INFO L124 PetriNetUnfolderBase]: 3752/6367 cut-off events. [2024-06-27 23:12:33,269 INFO L125 PetriNetUnfolderBase]: For 1328590/1328596 co-relation queries the response was YES. [2024-06-27 23:12:33,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54164 conditions, 6367 events. 3752/6367 cut-off events. For 1328590/1328596 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44476 event pairs, 1271 based on Foata normal form. 13/6375 useless extension candidates. Maximal degree in co-relation 53987. Up to 5774 conditions per place. [2024-06-27 23:12:33,362 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 322 selfloop transitions, 67 changer transitions 0/396 dead transitions. [2024-06-27 23:12:33,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 396 transitions, 5953 flow [2024-06-27 23:12:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 23:12:33,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-27 23:12:33,363 INFO L175 Difference]: Start difference. First operand has 384 places, 377 transitions, 5095 flow. Second operand 8 states and 181 transitions. [2024-06-27 23:12:33,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 396 transitions, 5953 flow [2024-06-27 23:12:39,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 396 transitions, 5516 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 23:12:39,530 INFO L231 Difference]: Finished difference. Result has 381 places, 377 transitions, 4801 flow [2024-06-27 23:12:39,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4801, PETRI_PLACES=381, PETRI_TRANSITIONS=377} [2024-06-27 23:12:39,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-27 23:12:39,531 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 377 transitions, 4801 flow [2024-06-27 23:12:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:39,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 23:12:39,531 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:39,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 103999981, now seen corresponding path program 6 times [2024-06-27 23:12:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521150158] [2024-06-27 23:12:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:39,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521150158] [2024-06-27 23:12:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521150158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:39,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:39,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:39,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41526630] [2024-06-27 23:12:39,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:39,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:39,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:39,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 377 transitions, 4801 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:39,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:39,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:39,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:41,023 INFO L124 PetriNetUnfolderBase]: 3818/6454 cut-off events. [2024-06-27 23:12:41,024 INFO L125 PetriNetUnfolderBase]: For 1403561/1403567 co-relation queries the response was YES. [2024-06-27 23:12:41,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55962 conditions, 6454 events. 3818/6454 cut-off events. For 1403561/1403567 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44932 event pairs, 1262 based on Foata normal form. 11/6460 useless extension candidates. Maximal degree in co-relation 55785. Up to 5782 conditions per place. [2024-06-27 23:12:41,284 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 330 selfloop transitions, 72 changer transitions 0/409 dead transitions. [2024-06-27 23:12:41,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 409 transitions, 6061 flow [2024-06-27 23:12:41,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:12:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:12:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 23:12:41,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 23:12:41,285 INFO L175 Difference]: Start difference. First operand has 381 places, 377 transitions, 4801 flow. Second operand 9 states and 209 transitions. [2024-06-27 23:12:41,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 409 transitions, 6061 flow [2024-06-27 23:12:47,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 409 transitions, 5894 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 23:12:47,553 INFO L231 Difference]: Finished difference. Result has 383 places, 379 transitions, 4876 flow [2024-06-27 23:12:47,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4876, PETRI_PLACES=383, PETRI_TRANSITIONS=379} [2024-06-27 23:12:47,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 23:12:47,553 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 379 transitions, 4876 flow [2024-06-27 23:12:47,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:47,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:47,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:47,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 23:12:47,554 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:47,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash 104147851, now seen corresponding path program 7 times [2024-06-27 23:12:47,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:47,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518938559] [2024-06-27 23:12:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518938559] [2024-06-27 23:12:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518938559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:47,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:47,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262056830] [2024-06-27 23:12:47,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:47,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:47,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:47,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:47,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 379 transitions, 4876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:47,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:47,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:49,169 INFO L124 PetriNetUnfolderBase]: 3800/6459 cut-off events. [2024-06-27 23:12:49,170 INFO L125 PetriNetUnfolderBase]: For 1372474/1372480 co-relation queries the response was YES. [2024-06-27 23:12:49,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54904 conditions, 6459 events. 3800/6459 cut-off events. For 1372474/1372480 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 45291 event pairs, 1291 based on Foata normal form. 13/6467 useless extension candidates. Maximal degree in co-relation 54726. Up to 5858 conditions per place. [2024-06-27 23:12:49,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 327 selfloop transitions, 67 changer transitions 0/401 dead transitions. [2024-06-27 23:12:49,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 401 transitions, 5752 flow [2024-06-27 23:12:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:12:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:12:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 23:12:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 23:12:49,257 INFO L175 Difference]: Start difference. First operand has 383 places, 379 transitions, 4876 flow. Second operand 8 states and 184 transitions. [2024-06-27 23:12:49,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 401 transitions, 5752 flow [2024-06-27 23:12:55,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 401 transitions, 5608 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 23:12:55,190 INFO L231 Difference]: Finished difference. Result has 386 places, 379 transitions, 4871 flow [2024-06-27 23:12:55,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4871, PETRI_PLACES=386, PETRI_TRANSITIONS=379} [2024-06-27 23:12:55,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-27 23:12:55,190 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 379 transitions, 4871 flow [2024-06-27 23:12:55,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:55,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:12:55,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:12:55,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 23:12:55,191 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:12:55,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:12:55,191 INFO L85 PathProgramCache]: Analyzing trace with hash 103999609, now seen corresponding path program 12 times [2024-06-27 23:12:55,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:12:55,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891502271] [2024-06-27 23:12:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:12:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:12:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:12:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:12:55,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:12:55,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891502271] [2024-06-27 23:12:55,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891502271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:12:55,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:12:55,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:12:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782429090] [2024-06-27 23:12:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:12:55,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:12:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:12:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:12:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:12:55,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:12:55,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 379 transitions, 4871 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:12:55,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:12:55,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:12:55,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:12:56,746 INFO L124 PetriNetUnfolderBase]: 3883/6602 cut-off events. [2024-06-27 23:12:56,746 INFO L125 PetriNetUnfolderBase]: For 1510077/1510083 co-relation queries the response was YES. [2024-06-27 23:12:56,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54808 conditions, 6602 events. 3883/6602 cut-off events. For 1510077/1510083 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46549 event pairs, 1231 based on Foata normal form. 35/6630 useless extension candidates. Maximal degree in co-relation 54628. Up to 5452 conditions per place. [2024-06-27 23:12:56,839 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 81 changer transitions 6/423 dead transitions. [2024-06-27 23:12:56,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 423 transitions, 5931 flow [2024-06-27 23:12:56,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:12:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:12:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 23:12:56,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-27 23:12:56,840 INFO L175 Difference]: Start difference. First operand has 386 places, 379 transitions, 4871 flow. Second operand 9 states and 226 transitions. [2024-06-27 23:12:56,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 423 transitions, 5931 flow [2024-06-27 23:13:03,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 423 transitions, 5781 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:03,848 INFO L231 Difference]: Finished difference. Result has 389 places, 379 transitions, 4908 flow [2024-06-27 23:13:03,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4908, PETRI_PLACES=389, PETRI_TRANSITIONS=379} [2024-06-27 23:13:03,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-27 23:13:03,849 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 379 transitions, 4908 flow [2024-06-27 23:13:03,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:03,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:03,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:03,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 23:13:03,849 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:03,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash 369697261, now seen corresponding path program 8 times [2024-06-27 23:13:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:03,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223738652] [2024-06-27 23:13:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:03,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:03,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:03,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223738652] [2024-06-27 23:13:03,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223738652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:03,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:03,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055183383] [2024-06-27 23:13:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:04,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:04,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 379 transitions, 4908 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:04,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:04,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:04,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:05,398 INFO L124 PetriNetUnfolderBase]: 3860/6545 cut-off events. [2024-06-27 23:13:05,398 INFO L125 PetriNetUnfolderBase]: For 1344659/1344665 co-relation queries the response was YES. [2024-06-27 23:13:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54656 conditions, 6545 events. 3860/6545 cut-off events. For 1344659/1344665 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 45779 event pairs, 1025 based on Foata normal form. 11/6551 useless extension candidates. Maximal degree in co-relation 54474. Up to 5697 conditions per place. [2024-06-27 23:13:05,487 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 325 selfloop transitions, 80 changer transitions 0/412 dead transitions. [2024-06-27 23:13:05,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 412 transitions, 5928 flow [2024-06-27 23:13:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 23:13:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 23:13:05,488 INFO L175 Difference]: Start difference. First operand has 389 places, 379 transitions, 4908 flow. Second operand 8 states and 193 transitions. [2024-06-27 23:13:05,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 412 transitions, 5928 flow [2024-06-27 23:13:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 412 transitions, 5663 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 23:13:13,572 INFO L231 Difference]: Finished difference. Result has 387 places, 380 transitions, 4857 flow [2024-06-27 23:13:13,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4857, PETRI_PLACES=387, PETRI_TRANSITIONS=380} [2024-06-27 23:13:13,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 23:13:13,572 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 380 transitions, 4857 flow [2024-06-27 23:13:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:13,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:13,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:13,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 23:13:13,573 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:13,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 369696889, now seen corresponding path program 13 times [2024-06-27 23:13:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426406253] [2024-06-27 23:13:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:13,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426406253] [2024-06-27 23:13:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426406253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:13,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264608059] [2024-06-27 23:13:13,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:13,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:13,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:13,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 380 transitions, 4857 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:13,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:13,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:15,172 INFO L124 PetriNetUnfolderBase]: 4012/6815 cut-off events. [2024-06-27 23:13:15,172 INFO L125 PetriNetUnfolderBase]: For 1493644/1493650 co-relation queries the response was YES. [2024-06-27 23:13:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 6815 events. 4012/6815 cut-off events. For 1493644/1493650 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 48387 event pairs, 1115 based on Foata normal form. 35/6845 useless extension candidates. Maximal degree in co-relation 55088. Up to 4791 conditions per place. [2024-06-27 23:13:15,272 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 325 selfloop transitions, 91 changer transitions 8/431 dead transitions. [2024-06-27 23:13:15,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 431 transitions, 6264 flow [2024-06-27 23:13:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:13:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:13:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 23:13:15,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6361111111111111 [2024-06-27 23:13:15,273 INFO L175 Difference]: Start difference. First operand has 387 places, 380 transitions, 4857 flow. Second operand 9 states and 229 transitions. [2024-06-27 23:13:15,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 431 transitions, 6264 flow [2024-06-27 23:13:23,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 431 transitions, 6042 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:23,371 INFO L231 Difference]: Finished difference. Result has 392 places, 380 transitions, 4871 flow [2024-06-27 23:13:23,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4871, PETRI_PLACES=392, PETRI_TRANSITIONS=380} [2024-06-27 23:13:23,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-27 23:13:23,371 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 380 transitions, 4871 flow [2024-06-27 23:13:23,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:23,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:23,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 23:13:23,372 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1134238911, now seen corresponding path program 5 times [2024-06-27 23:13:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210598029] [2024-06-27 23:13:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210598029] [2024-06-27 23:13:23,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210598029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:23,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:23,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093393486] [2024-06-27 23:13:23,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:23,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:23,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:23,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:23,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 380 transitions, 4871 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:23,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:23,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:23,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:25,043 INFO L124 PetriNetUnfolderBase]: 3863/6550 cut-off events. [2024-06-27 23:13:25,043 INFO L125 PetriNetUnfolderBase]: For 1515054/1515060 co-relation queries the response was YES. [2024-06-27 23:13:25,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53941 conditions, 6550 events. 3863/6550 cut-off events. For 1515054/1515060 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 46002 event pairs, 1225 based on Foata normal form. 35/6580 useless extension candidates. Maximal degree in co-relation 53757. Up to 5542 conditions per place. [2024-06-27 23:13:25,284 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 326 selfloop transitions, 78 changer transitions 6/417 dead transitions. [2024-06-27 23:13:25,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 417 transitions, 5937 flow [2024-06-27 23:13:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:13:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:13:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 23:13:25,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 23:13:25,285 INFO L175 Difference]: Start difference. First operand has 392 places, 380 transitions, 4871 flow. Second operand 9 states and 216 transitions. [2024-06-27 23:13:25,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 417 transitions, 5937 flow [2024-06-27 23:13:32,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 417 transitions, 5637 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 23:13:32,343 INFO L231 Difference]: Finished difference. Result has 392 places, 382 transitions, 4809 flow [2024-06-27 23:13:32,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4809, PETRI_PLACES=392, PETRI_TRANSITIONS=382} [2024-06-27 23:13:32,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-27 23:13:32,343 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 382 transitions, 4809 flow [2024-06-27 23:13:32,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:32,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:32,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:32,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 23:13:32,343 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:32,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1994897565, now seen corresponding path program 1 times [2024-06-27 23:13:32,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:32,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380861050] [2024-06-27 23:13:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:32,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380861050] [2024-06-27 23:13:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380861050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:32,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:32,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581793008] [2024-06-27 23:13:32,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:32,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:32,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:32,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 382 transitions, 4809 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:32,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:32,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:32,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:33,740 INFO L124 PetriNetUnfolderBase]: 3620/6129 cut-off events. [2024-06-27 23:13:33,740 INFO L125 PetriNetUnfolderBase]: For 929035/929041 co-relation queries the response was YES. [2024-06-27 23:13:33,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45531 conditions, 6129 events. 3620/6129 cut-off events. For 929035/929041 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 42472 event pairs, 1116 based on Foata normal form. 11/6135 useless extension candidates. Maximal degree in co-relation 45347. Up to 5466 conditions per place. [2024-06-27 23:13:33,825 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 332 selfloop transitions, 69 changer transitions 0/408 dead transitions. [2024-06-27 23:13:33,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 408 transitions, 5797 flow [2024-06-27 23:13:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:13:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:13:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 23:13:33,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-27 23:13:33,826 INFO L175 Difference]: Start difference. First operand has 392 places, 382 transitions, 4809 flow. Second operand 9 states and 201 transitions. [2024-06-27 23:13:33,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 408 transitions, 5797 flow [2024-06-27 23:13:39,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 408 transitions, 5603 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:39,280 INFO L231 Difference]: Finished difference. Result has 395 places, 385 transitions, 4858 flow [2024-06-27 23:13:39,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4617, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4858, PETRI_PLACES=395, PETRI_TRANSITIONS=385} [2024-06-27 23:13:39,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 23:13:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 385 transitions, 4858 flow [2024-06-27 23:13:39,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:39,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:39,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 23:13:39,281 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:39,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1577067897, now seen corresponding path program 2 times [2024-06-27 23:13:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480656079] [2024-06-27 23:13:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:39,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:39,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480656079] [2024-06-27 23:13:39,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480656079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:39,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:39,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31784266] [2024-06-27 23:13:39,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:39,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:39,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 385 transitions, 4858 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:39,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:40,641 INFO L124 PetriNetUnfolderBase]: 3607/6116 cut-off events. [2024-06-27 23:13:40,642 INFO L125 PetriNetUnfolderBase]: For 880568/880574 co-relation queries the response was YES. [2024-06-27 23:13:40,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44375 conditions, 6116 events. 3607/6116 cut-off events. For 880568/880574 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 42462 event pairs, 994 based on Foata normal form. 11/6122 useless extension candidates. Maximal degree in co-relation 44190. Up to 5331 conditions per place. [2024-06-27 23:13:40,731 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 324 selfloop transitions, 80 changer transitions 0/411 dead transitions. [2024-06-27 23:13:40,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 411 transitions, 5816 flow [2024-06-27 23:13:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:13:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:13:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 23:13:40,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-27 23:13:40,731 INFO L175 Difference]: Start difference. First operand has 395 places, 385 transitions, 4858 flow. Second operand 8 states and 187 transitions. [2024-06-27 23:13:40,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 411 transitions, 5816 flow [2024-06-27 23:13:44,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 411 transitions, 5655 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:13:44,547 INFO L231 Difference]: Finished difference. Result has 397 places, 385 transitions, 4861 flow [2024-06-27 23:13:44,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4697, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4861, PETRI_PLACES=397, PETRI_TRANSITIONS=385} [2024-06-27 23:13:44,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-27 23:13:44,548 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 385 transitions, 4861 flow [2024-06-27 23:13:44,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:44,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:44,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 23:13:44,548 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:44,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1577067711, now seen corresponding path program 6 times [2024-06-27 23:13:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848263794] [2024-06-27 23:13:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848263794] [2024-06-27 23:13:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848263794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345895931] [2024-06-27 23:13:44,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:44,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:44,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:44,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 385 transitions, 4861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:44,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:44,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:44,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:45,998 INFO L124 PetriNetUnfolderBase]: 3830/6509 cut-off events. [2024-06-27 23:13:45,998 INFO L125 PetriNetUnfolderBase]: For 1284207/1284213 co-relation queries the response was YES. [2024-06-27 23:13:46,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49656 conditions, 6509 events. 3830/6509 cut-off events. For 1284207/1284213 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45605 event pairs, 1101 based on Foata normal form. 35/6539 useless extension candidates. Maximal degree in co-relation 49470. Up to 4932 conditions per place. [2024-06-27 23:13:46,090 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 328 selfloop transitions, 84 changer transitions 8/427 dead transitions. [2024-06-27 23:13:46,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 427 transitions, 6256 flow [2024-06-27 23:13:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:13:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:13:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 23:13:46,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 23:13:46,091 INFO L175 Difference]: Start difference. First operand has 397 places, 385 transitions, 4861 flow. Second operand 9 states and 220 transitions. [2024-06-27 23:13:46,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 427 transitions, 6256 flow [2024-06-27 23:13:51,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 427 transitions, 5940 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 23:13:51,348 INFO L231 Difference]: Finished difference. Result has 399 places, 386 transitions, 4772 flow [2024-06-27 23:13:51,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4558, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4772, PETRI_PLACES=399, PETRI_TRANSITIONS=386} [2024-06-27 23:13:51,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-27 23:13:51,348 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 386 transitions, 4772 flow [2024-06-27 23:13:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:51,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:51,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:51,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 23:13:51,349 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:51,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1636293087, now seen corresponding path program 7 times [2024-06-27 23:13:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:51,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392330967] [2024-06-27 23:13:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:51,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392330967] [2024-06-27 23:13:51,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392330967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:51,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:51,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840085935] [2024-06-27 23:13:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:51,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:51,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 386 transitions, 4772 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:51,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:51,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:51,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:13:52,727 INFO L124 PetriNetUnfolderBase]: 3585/6060 cut-off events. [2024-06-27 23:13:52,727 INFO L125 PetriNetUnfolderBase]: For 1112344/1112350 co-relation queries the response was YES. [2024-06-27 23:13:52,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47095 conditions, 6060 events. 3585/6060 cut-off events. For 1112344/1112350 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 41788 event pairs, 1112 based on Foata normal form. 11/6066 useless extension candidates. Maximal degree in co-relation 46911. Up to 5497 conditions per place. [2024-06-27 23:13:52,814 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 334 selfloop transitions, 69 changer transitions 0/410 dead transitions. [2024-06-27 23:13:52,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 410 transitions, 5714 flow [2024-06-27 23:13:52,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:13:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:13:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:13:52,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 23:13:52,814 INFO L175 Difference]: Start difference. First operand has 399 places, 386 transitions, 4772 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:13:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 410 transitions, 5714 flow [2024-06-27 23:13:58,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 410 transitions, 5454 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 23:13:58,734 INFO L231 Difference]: Finished difference. Result has 401 places, 389 transitions, 4730 flow [2024-06-27 23:13:58,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4730, PETRI_PLACES=401, PETRI_TRANSITIONS=389} [2024-06-27 23:13:58,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 23:13:58,734 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 389 transitions, 4730 flow [2024-06-27 23:13:58,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:58,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:13:58,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:13:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 23:13:58,734 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:13:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:13:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1636413057, now seen corresponding path program 8 times [2024-06-27 23:13:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:13:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404585397] [2024-06-27 23:13:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:13:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:13:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:13:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:13:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:13:58,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404585397] [2024-06-27 23:13:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404585397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:13:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:13:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:13:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997164440] [2024-06-27 23:13:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:13:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:13:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:13:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:13:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:13:58,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:13:58,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 389 transitions, 4730 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:13:58,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:13:58,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:13:58,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:00,152 INFO L124 PetriNetUnfolderBase]: 3511/5959 cut-off events. [2024-06-27 23:14:00,153 INFO L125 PetriNetUnfolderBase]: For 952889/952894 co-relation queries the response was YES. [2024-06-27 23:14:00,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44063 conditions, 5959 events. 3511/5959 cut-off events. For 952889/952894 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 41094 event pairs, 1050 based on Foata normal form. 8/5961 useless extension candidates. Maximal degree in co-relation 43879. Up to 4937 conditions per place. [2024-06-27 23:14:00,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 284 selfloop transitions, 127 changer transitions 0/418 dead transitions. [2024-06-27 23:14:00,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 418 transitions, 6022 flow [2024-06-27 23:14:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:14:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:14:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-27 23:14:00,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-27 23:14:00,235 INFO L175 Difference]: Start difference. First operand has 401 places, 389 transitions, 4730 flow. Second operand 9 states and 208 transitions. [2024-06-27 23:14:00,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 418 transitions, 6022 flow [2024-06-27 23:14:06,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 418 transitions, 5771 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 23:14:06,367 INFO L231 Difference]: Finished difference. Result has 402 places, 391 transitions, 4839 flow [2024-06-27 23:14:06,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4839, PETRI_PLACES=402, PETRI_TRANSITIONS=391} [2024-06-27 23:14:06,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-27 23:14:06,368 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 391 transitions, 4839 flow [2024-06-27 23:14:06,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:14:06,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:14:06,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:14:06,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 23:14:06,368 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:14:06,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:14:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1350608449, now seen corresponding path program 9 times [2024-06-27 23:14:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:14:06,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919543890] [2024-06-27 23:14:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:14:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:14:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:14:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:14:06,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:14:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919543890] [2024-06-27 23:14:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919543890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:14:06,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:14:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:14:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674139757] [2024-06-27 23:14:06,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:14:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:14:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:14:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:14:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:14:06,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 23:14:06,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 391 transitions, 4839 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 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) [2024-06-27 23:14:06,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:14:06,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 23:14:06,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:14:07,807 INFO L124 PetriNetUnfolderBase]: 3539/6000 cut-off events. [2024-06-27 23:14:07,807 INFO L125 PetriNetUnfolderBase]: For 970908/970914 co-relation queries the response was YES. [2024-06-27 23:14:07,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44568 conditions, 6000 events. 3539/6000 cut-off events. For 970908/970914 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 41415 event pairs, 1068 based on Foata normal form. 11/6006 useless extension candidates. Maximal degree in co-relation 44383. Up to 5288 conditions per place. [2024-06-27 23:14:07,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 338 selfloop transitions, 75 changer transitions 0/420 dead transitions. [2024-06-27 23:14:07,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 420 transitions, 6087 flow [2024-06-27 23:14:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:14:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:14:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 23:14:07,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 23:14:07,888 INFO L175 Difference]: Start difference. First operand has 402 places, 391 transitions, 4839 flow. Second operand 10 states and 220 transitions. [2024-06-27 23:14:07,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 420 transitions, 6087 flow Killed by 15