./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.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/safe027_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe027_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.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-eb4cb34-m [2024-06-21 19:46:29,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:46:29,471 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:46:29,475 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:46:29,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:46:29,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:46:29,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:46:29,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:46:29,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:46:29,501 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:46:29,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:46:29,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:46:29,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:46:29,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:46:29,503 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:46:29,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:46:29,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:46:29,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:46:29,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:46:29,504 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:46:29,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:46:29,505 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:46:29,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:46:29,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:46:29,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:46:29,506 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:46:29,506 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:46:29,506 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:46:29,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:46:29,507 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:46:29,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:46:29,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:46:29,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:46:29,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:46:29,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:46:29,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:46:29,508 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:46:29,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:46:29,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:46:29,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:46:29,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:46:29,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:46:29,766 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:46:29,768 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:46:29,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.yml/witness.yml [2024-06-21 19:46:29,828 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:46:29,829 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:46:29,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-21 19:46:30,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:46:30,912 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:46:30,920 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-21 19:46:30,934 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a15dc69/a204a9c356bf41319ae5fb5f01a23bde/FLAG93db681dc [2024-06-21 19:46:30,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a15dc69/a204a9c356bf41319ae5fb5f01a23bde [2024-06-21 19:46:30,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:46:30,949 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:46:30,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:46:30,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:46:30,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:46:30,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:46:29" (1/2) ... [2024-06-21 19:46:30,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3f5272 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:46:30, skipping insertion in model container [2024-06-21 19:46:30,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:46:29" (1/2) ... [2024-06-21 19:46:30,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b411bba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:46:30, skipping insertion in model container [2024-06-21 19:46:30,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:46:30" (2/2) ... [2024-06-21 19:46:30,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3f5272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:30, skipping insertion in model container [2024-06-21 19:46:30,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:46:30" (2/2) ... [2024-06-21 19:46:30,956 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:46:30,983 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:46:30,985 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:46:30,985 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:46:30,985 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:46:30,985 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-21 19:46:30,985 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:46:30,985 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 19:46:31,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:46:31,340 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:46:31,348 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:46:31,434 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:46:31,465 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:46:31,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31 WrapperNode [2024-06-21 19:46:31,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:46:31,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:46:31,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:46:31,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:46:31,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,527 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 174 [2024-06-21 19:46:31,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:46:31,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:46:31,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:46:31,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:46:31,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,568 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-21 19:46:31,580 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,594 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:46:31,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:46:31,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:46:31,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:46:31,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (1/1) ... [2024-06-21 19:46:31,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:46:31,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:46:31,676 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) [2024-06-21 19:46:31,728 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 [2024-06-21 19:46:31,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:46:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:46:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:46:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:46:31,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:46:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:46:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:46:31,746 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:46:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:46:31,746 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:46:31,747 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:46:31,747 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:46:31,747 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 19:46:31,748 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 19:46:31,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:46:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:46:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:46:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:46:31,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:46:31,751 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:46:31,866 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:46:31,867 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:46:32,246 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:46:32,246 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:46:32,465 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:46:32,465 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:46:32,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:46:32 BoogieIcfgContainer [2024-06-21 19:46:32,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:46:32,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:46:32,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:46:32,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:46:32,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:46:29" (1/4) ... [2024-06-21 19:46:32,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76065aa7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:46:32, skipping insertion in model container [2024-06-21 19:46:32,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:46:30" (2/4) ... [2024-06-21 19:46:32,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76065aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:46:32, skipping insertion in model container [2024-06-21 19:46:32,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:46:31" (3/4) ... [2024-06-21 19:46:32,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76065aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:46:32, skipping insertion in model container [2024-06-21 19:46:32,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:46:32" (4/4) ... [2024-06-21 19:46:32,475 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-21 19:46:32,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:46:32,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 19:46:32,489 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:46:32,539 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:46:32,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 19:46:32,612 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 19:46:32,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:46:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:46:32,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 19:46:32,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 19:46:32,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:46:32,633 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;@6625475b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:46:32,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 19:46:32,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:46:32,638 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 19:46:32,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:46:32,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:32,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:46:32,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:32,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:32,643 INFO L85 PathProgramCache]: Analyzing trace with hash 723214095, now seen corresponding path program 1 times [2024-06-21 19:46:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878355323] [2024-06-21 19:46:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:32,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:33,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:33,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878355323] [2024-06-21 19:46:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878355323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:33,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:33,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:46:33,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231199196] [2024-06-21 19:46:33,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:46:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:46:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:46:33,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:33,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:33,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:33,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:33,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:33,504 INFO L124 PetriNetUnfolderBase]: 1114/1900 cut-off events. [2024-06-21 19:46:33,504 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-21 19:46:33,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 1900 events. 1114/1900 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11314 event pairs, 656 based on Foata normal form. 1/1791 useless extension candidates. Maximal degree in co-relation 3603. Up to 1616 conditions per place. [2024-06-21 19:46:33,517 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 40 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 19:46:33,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 229 flow [2024-06-21 19:46:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:46:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:46:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-21 19:46:33,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 19:46:33,527 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 103 transitions. [2024-06-21 19:46:33,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 229 flow [2024-06-21 19:46:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:33,532 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 19:46:33,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 19:46:33,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 19:46:33,536 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 19:46:33,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:33,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:33,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:33,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:46:33,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:33,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:33,537 INFO L85 PathProgramCache]: Analyzing trace with hash -775742046, now seen corresponding path program 1 times [2024-06-21 19:46:33,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:33,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831792548] [2024-06-21 19:46:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:33,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831792548] [2024-06-21 19:46:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831792548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:33,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:46:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103551716] [2024-06-21 19:46:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:46:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:46:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:46:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:33,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:33,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:33,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:33,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:34,228 INFO L124 PetriNetUnfolderBase]: 1066/1785 cut-off events. [2024-06-21 19:46:34,228 INFO L125 PetriNetUnfolderBase]: For 374/383 co-relation queries the response was YES. [2024-06-21 19:46:34,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4118 conditions, 1785 events. 1066/1785 cut-off events. For 374/383 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10694 event pairs, 438 based on Foata normal form. 22/1738 useless extension candidates. Maximal degree in co-relation 4106. Up to 1404 conditions per place. [2024-06-21 19:46:34,236 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 41 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-21 19:46:34,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 261 flow [2024-06-21 19:46:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:46:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:46:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-21 19:46:34,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-06-21 19:46:34,238 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 3 states and 100 transitions. [2024-06-21 19:46:34,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 261 flow [2024-06-21 19:46:34,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:46:34,240 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 155 flow [2024-06-21 19:46:34,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 19:46:34,241 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-06-21 19:46:34,241 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 155 flow [2024-06-21 19:46:34,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:34,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:34,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:34,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:46:34,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:34,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 217252820, now seen corresponding path program 1 times [2024-06-21 19:46:34,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089169112] [2024-06-21 19:46:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089169112] [2024-06-21 19:46:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089169112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:34,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:46:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606924641] [2024-06-21 19:46:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:34,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:46:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:46:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:46:34,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:34,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 155 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:34,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:34,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:34,717 INFO L124 PetriNetUnfolderBase]: 1988/3224 cut-off events. [2024-06-21 19:46:34,717 INFO L125 PetriNetUnfolderBase]: For 1298/1298 co-relation queries the response was YES. [2024-06-21 19:46:34,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7932 conditions, 3224 events. 1988/3224 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19351 event pairs, 1101 based on Foata normal form. 6/3174 useless extension candidates. Maximal degree in co-relation 7918. Up to 2787 conditions per place. [2024-06-21 19:46:34,733 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 57 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-21 19:46:34,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 373 flow [2024-06-21 19:46:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:46:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:46:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-21 19:46:34,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057692307692307 [2024-06-21 19:46:34,735 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 155 flow. Second operand 4 states and 126 transitions. [2024-06-21 19:46:34,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 373 flow [2024-06-21 19:46:34,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:46:34,737 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 223 flow [2024-06-21 19:46:34,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 19:46:34,738 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2024-06-21 19:46:34,738 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 223 flow [2024-06-21 19:46:34,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:34,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:34,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:46:34,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:34,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1679118413, now seen corresponding path program 1 times [2024-06-21 19:46:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:34,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343343015] [2024-06-21 19:46:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:34,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:35,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343343015] [2024-06-21 19:46:35,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343343015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:35,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:35,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579511990] [2024-06-21 19:46:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:35,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:35,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:35,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:35,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:35,532 INFO L124 PetriNetUnfolderBase]: 1973/3218 cut-off events. [2024-06-21 19:46:35,533 INFO L125 PetriNetUnfolderBase]: For 2403/2403 co-relation queries the response was YES. [2024-06-21 19:46:35,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8528 conditions, 3218 events. 1973/3218 cut-off events. For 2403/2403 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19394 event pairs, 860 based on Foata normal form. 6/3169 useless extension candidates. Maximal degree in co-relation 8511. Up to 2681 conditions per place. [2024-06-21 19:46:35,551 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 59 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-21 19:46:35,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 455 flow [2024-06-21 19:46:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:46:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:46:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-21 19:46:35,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 19:46:35,552 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 223 flow. Second operand 4 states and 128 transitions. [2024-06-21 19:46:35,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 455 flow [2024-06-21 19:46:35,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 449 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 19:46:35,556 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 306 flow [2024-06-21 19:46:35,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 19:46:35,557 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-21 19:46:35,557 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 306 flow [2024-06-21 19:46:35,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:35,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:35,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:35,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:46:35,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:35,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash -693912155, now seen corresponding path program 1 times [2024-06-21 19:46:35,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:35,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71712645] [2024-06-21 19:46:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:35,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:35,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:35,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71712645] [2024-06-21 19:46:35,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71712645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:35,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:35,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533342802] [2024-06-21 19:46:35,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:35,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:35,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 19:46:35,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:35,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:35,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 19:46:35,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:36,430 INFO L124 PetriNetUnfolderBase]: 2549/4196 cut-off events. [2024-06-21 19:46:36,431 INFO L125 PetriNetUnfolderBase]: For 5434/5442 co-relation queries the response was YES. [2024-06-21 19:46:36,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12228 conditions, 4196 events. 2549/4196 cut-off events. For 5434/5442 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26754 event pairs, 584 based on Foata normal form. 40/4196 useless extension candidates. Maximal degree in co-relation 12206. Up to 2873 conditions per place. [2024-06-21 19:46:36,458 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 106 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-21 19:46:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 151 transitions, 923 flow [2024-06-21 19:46:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:46:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:46:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-21 19:46:36,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5817307692307693 [2024-06-21 19:46:36,467 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 306 flow. Second operand 8 states and 242 transitions. [2024-06-21 19:46:36,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 151 transitions, 923 flow [2024-06-21 19:46:36,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 151 transitions, 909 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 19:46:36,479 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 564 flow [2024-06-21 19:46:36,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=564, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-06-21 19:46:36,481 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-21 19:46:36,482 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 564 flow [2024-06-21 19:46:36,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:36,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:36,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:36,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:46:36,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:36,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash -513182129, now seen corresponding path program 2 times [2024-06-21 19:46:36,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:36,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919782660] [2024-06-21 19:46:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919782660] [2024-06-21 19:46:36,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919782660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:36,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:36,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981939337] [2024-06-21 19:46:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:36,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:36,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:36,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:36,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:36,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:36,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:36,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:37,416 INFO L124 PetriNetUnfolderBase]: 2961/4904 cut-off events. [2024-06-21 19:46:37,416 INFO L125 PetriNetUnfolderBase]: For 11937/11943 co-relation queries the response was YES. [2024-06-21 19:46:37,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16656 conditions, 4904 events. 2961/4904 cut-off events. For 11937/11943 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32175 event pairs, 500 based on Foata normal form. 61/4897 useless extension candidates. Maximal degree in co-relation 16628. Up to 3059 conditions per place. [2024-06-21 19:46:37,446 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 85 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2024-06-21 19:46:37,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 125 transitions, 970 flow [2024-06-21 19:46:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:46:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:46:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-21 19:46:37,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 19:46:37,448 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 564 flow. Second operand 4 states and 130 transitions. [2024-06-21 19:46:37,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 125 transitions, 970 flow [2024-06-21 19:46:37,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 956 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:37,460 INFO L231 Difference]: Finished difference. Result has 77 places, 95 transitions, 722 flow [2024-06-21 19:46:37,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=722, PETRI_PLACES=77, PETRI_TRANSITIONS=95} [2024-06-21 19:46:37,461 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-21 19:46:37,461 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 95 transitions, 722 flow [2024-06-21 19:46:37,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:37,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:37,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:46:37,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:37,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash -208835377, now seen corresponding path program 3 times [2024-06-21 19:46:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:37,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146813877] [2024-06-21 19:46:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146813877] [2024-06-21 19:46:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146813877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:37,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:37,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689444736] [2024-06-21 19:46:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:37,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:37,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 95 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:37,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:37,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:37,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:38,384 INFO L124 PetriNetUnfolderBase]: 2937/4923 cut-off events. [2024-06-21 19:46:38,384 INFO L125 PetriNetUnfolderBase]: For 15091/15097 co-relation queries the response was YES. [2024-06-21 19:46:38,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18474 conditions, 4923 events. 2937/4923 cut-off events. For 15091/15097 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 32620 event pairs, 494 based on Foata normal form. 13/4848 useless extension candidates. Maximal degree in co-relation 18445. Up to 3570 conditions per place. [2024-06-21 19:46:38,416 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 92 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-21 19:46:38,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 1140 flow [2024-06-21 19:46:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-21 19:46:38,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 19:46:38,418 INFO L175 Difference]: Start difference. First operand has 77 places, 95 transitions, 722 flow. Second operand 5 states and 150 transitions. [2024-06-21 19:46:38,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 1140 flow [2024-06-21 19:46:38,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 132 transitions, 1081 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:38,435 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 871 flow [2024-06-21 19:46:38,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-21 19:46:38,435 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-21 19:46:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 871 flow [2024-06-21 19:46:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:38,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:46:38,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1097043001, now seen corresponding path program 1 times [2024-06-21 19:46:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:38,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691073090] [2024-06-21 19:46:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691073090] [2024-06-21 19:46:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691073090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293765482] [2024-06-21 19:46:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:38,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:38,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 871 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 19:46:38,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:38,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:38,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:39,240 INFO L124 PetriNetUnfolderBase]: 2925/4890 cut-off events. [2024-06-21 19:46:39,241 INFO L125 PetriNetUnfolderBase]: For 17873/17875 co-relation queries the response was YES. [2024-06-21 19:46:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18933 conditions, 4890 events. 2925/4890 cut-off events. For 17873/17875 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32203 event pairs, 1046 based on Foata normal form. 6/4810 useless extension candidates. Maximal degree in co-relation 18901. Up to 4089 conditions per place. [2024-06-21 19:46:39,280 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 108 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-06-21 19:46:39,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 137 transitions, 1255 flow [2024-06-21 19:46:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-21 19:46:39,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-21 19:46:39,282 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 871 flow. Second operand 5 states and 151 transitions. [2024-06-21 19:46:39,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 137 transitions, 1255 flow [2024-06-21 19:46:39,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1233 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-21 19:46:39,314 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 967 flow [2024-06-21 19:46:39,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=967, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2024-06-21 19:46:39,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-21 19:46:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 967 flow [2024-06-21 19:46:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2024-06-21 19:46:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:46:39,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 539912104, now seen corresponding path program 1 times [2024-06-21 19:46:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814062457] [2024-06-21 19:46:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:39,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:39,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814062457] [2024-06-21 19:46:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814062457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:39,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:39,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:39,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342790395] [2024-06-21 19:46:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:39,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:39,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 967 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:39,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:39,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:40,213 INFO L124 PetriNetUnfolderBase]: 3085/5214 cut-off events. [2024-06-21 19:46:40,213 INFO L125 PetriNetUnfolderBase]: For 22067/22086 co-relation queries the response was YES. [2024-06-21 19:46:40,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20766 conditions, 5214 events. 3085/5214 cut-off events. For 22067/22086 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 35336 event pairs, 816 based on Foata normal form. 30/5162 useless extension candidates. Maximal degree in co-relation 20730. Up to 3501 conditions per place. [2024-06-21 19:46:40,245 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 125 selfloop transitions, 38 changer transitions 0/175 dead transitions. [2024-06-21 19:46:40,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 175 transitions, 1733 flow [2024-06-21 19:46:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-21 19:46:40,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 19:46:40,247 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 967 flow. Second operand 6 states and 186 transitions. [2024-06-21 19:46:40,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 175 transitions, 1733 flow [2024-06-21 19:46:40,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 175 transitions, 1681 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:40,287 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 1243 flow [2024-06-21 19:46:40,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1243, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2024-06-21 19:46:40,287 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 19:46:40,288 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 1243 flow [2024-06-21 19:46:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:40,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:40,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:40,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:46:40,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:40,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash -569913354, now seen corresponding path program 2 times [2024-06-21 19:46:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:40,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999863622] [2024-06-21 19:46:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:40,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999863622] [2024-06-21 19:46:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999863622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:40,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:40,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189586864] [2024-06-21 19:46:40,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:40,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:40,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:40,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 1243 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:40,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:40,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:40,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:41,220 INFO L124 PetriNetUnfolderBase]: 3209/5380 cut-off events. [2024-06-21 19:46:41,221 INFO L125 PetriNetUnfolderBase]: For 30078/30084 co-relation queries the response was YES. [2024-06-21 19:46:41,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22737 conditions, 5380 events. 3209/5380 cut-off events. For 30078/30084 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36590 event pairs, 522 based on Foata normal form. 33/5351 useless extension candidates. Maximal degree in co-relation 22697. Up to 2949 conditions per place. [2024-06-21 19:46:41,257 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 105 selfloop transitions, 49 changer transitions 0/166 dead transitions. [2024-06-21 19:46:41,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 166 transitions, 1780 flow [2024-06-21 19:46:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-21 19:46:41,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038461538461538 [2024-06-21 19:46:41,259 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 1243 flow. Second operand 5 states and 157 transitions. [2024-06-21 19:46:41,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 166 transitions, 1780 flow [2024-06-21 19:46:41,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1760 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-21 19:46:41,327 INFO L231 Difference]: Finished difference. Result has 100 places, 128 transitions, 1431 flow [2024-06-21 19:46:41,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1431, PETRI_PLACES=100, PETRI_TRANSITIONS=128} [2024-06-21 19:46:41,328 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 19:46:41,328 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 128 transitions, 1431 flow [2024-06-21 19:46:41,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:41,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:41,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:46:41,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:41,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1803751304, now seen corresponding path program 1 times [2024-06-21 19:46:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:41,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146932518] [2024-06-21 19:46:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:41,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:41,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146932518] [2024-06-21 19:46:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146932518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:41,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:41,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589732132] [2024-06-21 19:46:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:41,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:41,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 128 transitions, 1431 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:41,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:42,238 INFO L124 PetriNetUnfolderBase]: 3185/5422 cut-off events. [2024-06-21 19:46:42,238 INFO L125 PetriNetUnfolderBase]: For 34962/34981 co-relation queries the response was YES. [2024-06-21 19:46:42,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23900 conditions, 5422 events. 3185/5422 cut-off events. For 34962/34981 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 37565 event pairs, 868 based on Foata normal form. 18/5342 useless extension candidates. Maximal degree in co-relation 23856. Up to 3651 conditions per place. [2024-06-21 19:46:42,283 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 120 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-06-21 19:46:42,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1957 flow [2024-06-21 19:46:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-21 19:46:42,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-21 19:46:42,285 INFO L175 Difference]: Start difference. First operand has 100 places, 128 transitions, 1431 flow. Second operand 5 states and 159 transitions. [2024-06-21 19:46:42,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1957 flow [2024-06-21 19:46:42,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1867 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:42,378 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1429 flow [2024-06-21 19:46:42,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1429, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-21 19:46:42,379 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-21 19:46:42,379 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1429 flow [2024-06-21 19:46:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:42,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:46:42,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash -487455622, now seen corresponding path program 2 times [2024-06-21 19:46:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644083707] [2024-06-21 19:46:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:42,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644083707] [2024-06-21 19:46:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644083707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:42,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069108373] [2024-06-21 19:46:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:42,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:42,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1429 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:42,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:42,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:42,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:43,548 INFO L124 PetriNetUnfolderBase]: 3141/5264 cut-off events. [2024-06-21 19:46:43,548 INFO L125 PetriNetUnfolderBase]: For 37519/37525 co-relation queries the response was YES. [2024-06-21 19:46:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 5264 events. 3141/5264 cut-off events. For 37519/37525 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35626 event pairs, 466 based on Foata normal form. 13/5231 useless extension candidates. Maximal degree in co-relation 23342. Up to 2883 conditions per place. [2024-06-21 19:46:43,590 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 105 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-21 19:46:43,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 168 transitions, 1880 flow [2024-06-21 19:46:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 19:46:43,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-21 19:46:43,592 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1429 flow. Second operand 5 states and 161 transitions. [2024-06-21 19:46:43,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 168 transitions, 1880 flow [2024-06-21 19:46:43,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1784 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:46:43,685 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1453 flow [2024-06-21 19:46:43,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1453, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-21 19:46:43,686 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-21 19:46:43,686 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1453 flow [2024-06-21 19:46:43,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:43,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:43,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:43,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:46:43,687 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:43,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:43,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1293930372, now seen corresponding path program 1 times [2024-06-21 19:46:43,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:43,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32203693] [2024-06-21 19:46:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:43,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:43,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:43,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32203693] [2024-06-21 19:46:43,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32203693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:43,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:43,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:46:43,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818254066] [2024-06-21 19:46:43,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:46:43,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:43,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:46:43,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:46:43,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:43,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1453 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:43,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:43,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:43,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:44,373 INFO L124 PetriNetUnfolderBase]: 2720/4791 cut-off events. [2024-06-21 19:46:44,373 INFO L125 PetriNetUnfolderBase]: For 35261/35478 co-relation queries the response was YES. [2024-06-21 19:46:44,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20927 conditions, 4791 events. 2720/4791 cut-off events. For 35261/35478 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34253 event pairs, 993 based on Foata normal form. 135/4798 useless extension candidates. Maximal degree in co-relation 20882. Up to 3635 conditions per place. [2024-06-21 19:46:44,409 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 97 selfloop transitions, 15 changer transitions 0/148 dead transitions. [2024-06-21 19:46:44,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 148 transitions, 1779 flow [2024-06-21 19:46:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:46:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:46:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 19:46:44,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 19:46:44,411 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1453 flow. Second operand 4 states and 123 transitions. [2024-06-21 19:46:44,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 148 transitions, 1779 flow [2024-06-21 19:46:44,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 148 transitions, 1689 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 19:46:44,492 INFO L231 Difference]: Finished difference. Result has 105 places, 133 transitions, 1461 flow [2024-06-21 19:46:44,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1461, PETRI_PLACES=105, PETRI_TRANSITIONS=133} [2024-06-21 19:46:44,493 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 19:46:44,493 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 133 transitions, 1461 flow [2024-06-21 19:46:44,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:44,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:44,493 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] [2024-06-21 19:46:44,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:46:44,493 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:44,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1551876126, now seen corresponding path program 1 times [2024-06-21 19:46:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:44,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273886725] [2024-06-21 19:46:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:44,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:44,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273886725] [2024-06-21 19:46:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273886725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:44,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:44,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010376096] [2024-06-21 19:46:44,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:44,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:44,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 133 transitions, 1461 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:44,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:44,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:44,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:45,404 INFO L124 PetriNetUnfolderBase]: 3217/5378 cut-off events. [2024-06-21 19:46:45,405 INFO L125 PetriNetUnfolderBase]: For 36874/36880 co-relation queries the response was YES. [2024-06-21 19:46:45,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24077 conditions, 5378 events. 3217/5378 cut-off events. For 36874/36880 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36799 event pairs, 406 based on Foata normal form. 9/5343 useless extension candidates. Maximal degree in co-relation 24030. Up to 3297 conditions per place. [2024-06-21 19:46:45,442 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 109 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-21 19:46:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1953 flow [2024-06-21 19:46:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 19:46:45,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 19:46:45,444 INFO L175 Difference]: Start difference. First operand has 105 places, 133 transitions, 1461 flow. Second operand 5 states and 155 transitions. [2024-06-21 19:46:45,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1953 flow [2024-06-21 19:46:45,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1931 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 19:46:45,530 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1622 flow [2024-06-21 19:46:45,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-21 19:46:45,531 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-21 19:46:45,531 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1622 flow [2024-06-21 19:46:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:45,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:45,531 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] [2024-06-21 19:46:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:46:45,531 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:45,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1837822144, now seen corresponding path program 2 times [2024-06-21 19:46:45,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:45,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480973] [2024-06-21 19:46:45,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480973] [2024-06-21 19:46:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:45,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106001764] [2024-06-21 19:46:45,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:45,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:45,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1622 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:45,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:45,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:46,538 INFO L124 PetriNetUnfolderBase]: 3461/5846 cut-off events. [2024-06-21 19:46:46,538 INFO L125 PetriNetUnfolderBase]: For 48201/48207 co-relation queries the response was YES. [2024-06-21 19:46:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26878 conditions, 5846 events. 3461/5846 cut-off events. For 48201/48207 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 41398 event pairs, 540 based on Foata normal form. 25/5759 useless extension candidates. Maximal degree in co-relation 26829. Up to 2153 conditions per place. [2024-06-21 19:46:46,578 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 120 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2024-06-21 19:46:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 2269 flow [2024-06-21 19:46:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 19:46:46,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5737179487179487 [2024-06-21 19:46:46,579 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1622 flow. Second operand 6 states and 179 transitions. [2024-06-21 19:46:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 2269 flow [2024-06-21 19:46:46,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 2157 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:46:46,689 INFO L231 Difference]: Finished difference. Result has 112 places, 140 transitions, 1666 flow [2024-06-21 19:46:46,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1666, PETRI_PLACES=112, PETRI_TRANSITIONS=140} [2024-06-21 19:46:46,689 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 19:46:46,690 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 140 transitions, 1666 flow [2024-06-21 19:46:46,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:46,690 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] [2024-06-21 19:46:46,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:46:46,690 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:46,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:46,691 INFO L85 PathProgramCache]: Analyzing trace with hash 451868552, now seen corresponding path program 3 times [2024-06-21 19:46:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:46,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190739387] [2024-06-21 19:46:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:46,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190739387] [2024-06-21 19:46:46,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190739387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:46,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:46,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:46,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627870040] [2024-06-21 19:46:46,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:46,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:46,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:46,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:46,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 140 transitions, 1666 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:46,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:46,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:47,763 INFO L124 PetriNetUnfolderBase]: 3593/6098 cut-off events. [2024-06-21 19:46:47,763 INFO L125 PetriNetUnfolderBase]: For 54428/54434 co-relation queries the response was YES. [2024-06-21 19:46:47,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27987 conditions, 6098 events. 3593/6098 cut-off events. For 54428/54434 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43865 event pairs, 558 based on Foata normal form. 25/5993 useless extension candidates. Maximal degree in co-relation 27937. Up to 2177 conditions per place. [2024-06-21 19:46:47,809 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 118 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-21 19:46:47,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 184 transitions, 2313 flow [2024-06-21 19:46:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 19:46:47,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 19:46:47,810 INFO L175 Difference]: Start difference. First operand has 112 places, 140 transitions, 1666 flow. Second operand 6 states and 176 transitions. [2024-06-21 19:46:47,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 184 transitions, 2313 flow [2024-06-21 19:46:47,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 2241 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:47,938 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1734 flow [2024-06-21 19:46:47,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-21 19:46:47,938 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-21 19:46:47,939 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1734 flow [2024-06-21 19:46:47,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:47,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:47,939 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] [2024-06-21 19:46:47,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:46:47,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:47,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2056063424, now seen corresponding path program 4 times [2024-06-21 19:46:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:47,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229145475] [2024-06-21 19:46:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:47,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:48,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229145475] [2024-06-21 19:46:48,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229145475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:48,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:48,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429973440] [2024-06-21 19:46:48,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:48,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:48,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:48,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1734 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:48,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:48,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:48,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:49,067 INFO L124 PetriNetUnfolderBase]: 3793/6530 cut-off events. [2024-06-21 19:46:49,068 INFO L125 PetriNetUnfolderBase]: For 60382/60388 co-relation queries the response was YES. [2024-06-21 19:46:49,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29688 conditions, 6530 events. 3793/6530 cut-off events. For 60382/60388 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48465 event pairs, 450 based on Foata normal form. 25/6487 useless extension candidates. Maximal degree in co-relation 29637. Up to 4053 conditions per place. [2024-06-21 19:46:49,107 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 125 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-21 19:46:49,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 2266 flow [2024-06-21 19:46:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-21 19:46:49,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-21 19:46:49,109 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1734 flow. Second operand 5 states and 159 transitions. [2024-06-21 19:46:49,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 2266 flow [2024-06-21 19:46:49,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 2198 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:49,244 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1835 flow [2024-06-21 19:46:49,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1835, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-21 19:46:49,244 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-21 19:46:49,244 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1835 flow [2024-06-21 19:46:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:49,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:49,245 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] [2024-06-21 19:46:49,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:46:49,245 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:49,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2068746594, now seen corresponding path program 5 times [2024-06-21 19:46:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:49,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95931707] [2024-06-21 19:46:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95931707] [2024-06-21 19:46:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95931707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:49,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:49,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193878756] [2024-06-21 19:46:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:49,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:49,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:49,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1835 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:49,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:49,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:49,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:50,379 INFO L124 PetriNetUnfolderBase]: 3853/6654 cut-off events. [2024-06-21 19:46:50,380 INFO L125 PetriNetUnfolderBase]: For 66691/66697 co-relation queries the response was YES. [2024-06-21 19:46:50,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30568 conditions, 6654 events. 3853/6654 cut-off events. For 66691/66697 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 49603 event pairs, 522 based on Foata normal form. 25/6591 useless extension candidates. Maximal degree in co-relation 30516. Up to 3189 conditions per place. [2024-06-21 19:46:50,428 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 128 selfloop transitions, 57 changer transitions 0/197 dead transitions. [2024-06-21 19:46:50,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2478 flow [2024-06-21 19:46:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 19:46:50,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 19:46:50,430 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1835 flow. Second operand 6 states and 190 transitions. [2024-06-21 19:46:50,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2478 flow [2024-06-21 19:46:50,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 2360 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 19:46:50,631 INFO L231 Difference]: Finished difference. Result has 122 places, 146 transitions, 1865 flow [2024-06-21 19:46:50,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1865, PETRI_PLACES=122, PETRI_TRANSITIONS=146} [2024-06-21 19:46:50,632 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-21 19:46:50,632 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 146 transitions, 1865 flow [2024-06-21 19:46:50,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-06-21 19:46:50,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:50,632 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] [2024-06-21 19:46:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:46:50,633 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:50,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1457138507, now seen corresponding path program 1 times [2024-06-21 19:46:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315832562] [2024-06-21 19:46:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:50,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:50,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315832562] [2024-06-21 19:46:50,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315832562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:50,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:50,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87891611] [2024-06-21 19:46:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:50,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:50,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:50,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 146 transitions, 1865 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:50,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:50,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:50,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:51,590 INFO L124 PetriNetUnfolderBase]: 3254/5950 cut-off events. [2024-06-21 19:46:51,590 INFO L125 PetriNetUnfolderBase]: For 66324/66675 co-relation queries the response was YES. [2024-06-21 19:46:51,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 5950 events. 3254/5950 cut-off events. For 66324/66675 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46448 event pairs, 1187 based on Foata normal form. 255/6031 useless extension candidates. Maximal degree in co-relation 26992. Up to 4502 conditions per place. [2024-06-21 19:46:51,638 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 107 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-06-21 19:46:51,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 2147 flow [2024-06-21 19:46:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:46:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:46:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 19:46:51,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 19:46:51,639 INFO L175 Difference]: Start difference. First operand has 122 places, 146 transitions, 1865 flow. Second operand 4 states and 122 transitions. [2024-06-21 19:46:51,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 2147 flow [2024-06-21 19:46:51,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 2009 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:51,832 INFO L231 Difference]: Finished difference. Result has 122 places, 146 transitions, 1771 flow [2024-06-21 19:46:51,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1771, PETRI_PLACES=122, PETRI_TRANSITIONS=146} [2024-06-21 19:46:51,833 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-21 19:46:51,833 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 146 transitions, 1771 flow [2024-06-21 19:46:51,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:51,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:51,834 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] [2024-06-21 19:46:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:46:51,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -20780341, now seen corresponding path program 1 times [2024-06-21 19:46:51,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:51,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957691096] [2024-06-21 19:46:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:51,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:52,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:52,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957691096] [2024-06-21 19:46:52,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957691096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:52,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:52,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:52,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535715934] [2024-06-21 19:46:52,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:52,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:52,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:52,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:52,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 146 transitions, 1771 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:52,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:52,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:53,090 INFO L124 PetriNetUnfolderBase]: 3911/6764 cut-off events. [2024-06-21 19:46:53,090 INFO L125 PetriNetUnfolderBase]: For 67135/67141 co-relation queries the response was YES. [2024-06-21 19:46:53,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30240 conditions, 6764 events. 3911/6764 cut-off events. For 67135/67141 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50476 event pairs, 830 based on Foata normal form. 17/6707 useless extension candidates. Maximal degree in co-relation 30186. Up to 3859 conditions per place. [2024-06-21 19:46:53,144 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 126 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-21 19:46:53,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 194 transitions, 2358 flow [2024-06-21 19:46:53,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-21 19:46:53,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 19:46:53,146 INFO L175 Difference]: Start difference. First operand has 122 places, 146 transitions, 1771 flow. Second operand 6 states and 182 transitions. [2024-06-21 19:46:53,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 194 transitions, 2358 flow [2024-06-21 19:46:53,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 2290 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:46:53,348 INFO L231 Difference]: Finished difference. Result has 126 places, 152 transitions, 1959 flow [2024-06-21 19:46:53,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1959, PETRI_PLACES=126, PETRI_TRANSITIONS=152} [2024-06-21 19:46:53,348 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 19:46:53,348 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 152 transitions, 1959 flow [2024-06-21 19:46:53,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:53,348 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] [2024-06-21 19:46:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:46:53,349 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:53,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash -521402019, now seen corresponding path program 2 times [2024-06-21 19:46:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906796056] [2024-06-21 19:46:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:53,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:53,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906796056] [2024-06-21 19:46:53,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906796056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:53,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:53,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:53,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833311338] [2024-06-21 19:46:53,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:53,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:53,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:53,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:53,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 152 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:53,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:53,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:53,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:54,687 INFO L124 PetriNetUnfolderBase]: 4853/8426 cut-off events. [2024-06-21 19:46:54,687 INFO L125 PetriNetUnfolderBase]: For 96408/96414 co-relation queries the response was YES. [2024-06-21 19:46:54,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38100 conditions, 8426 events. 4853/8426 cut-off events. For 96408/96414 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 65877 event pairs, 1044 based on Foata normal form. 41/8367 useless extension candidates. Maximal degree in co-relation 38044. Up to 2440 conditions per place. [2024-06-21 19:46:54,758 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 156 selfloop transitions, 43 changer transitions 0/211 dead transitions. [2024-06-21 19:46:54,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 211 transitions, 2708 flow [2024-06-21 19:46:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 19:46:54,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 19:46:54,760 INFO L175 Difference]: Start difference. First operand has 126 places, 152 transitions, 1959 flow. Second operand 6 states and 188 transitions. [2024-06-21 19:46:54,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 211 transitions, 2708 flow [2024-06-21 19:46:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2527 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:46:55,060 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1965 flow [2024-06-21 19:46:55,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1965, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-21 19:46:55,061 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-21 19:46:55,061 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1965 flow [2024-06-21 19:46:55,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:55,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:55,061 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] [2024-06-21 19:46:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:46:55,062 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:55,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash -825778841, now seen corresponding path program 1 times [2024-06-21 19:46:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551030393] [2024-06-21 19:46:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:55,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:55,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551030393] [2024-06-21 19:46:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551030393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:55,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897353593] [2024-06-21 19:46:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:55,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:55,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1965 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:55,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:55,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:55,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:56,131 INFO L124 PetriNetUnfolderBase]: 4173/7605 cut-off events. [2024-06-21 19:46:56,131 INFO L125 PetriNetUnfolderBase]: For 97121/97495 co-relation queries the response was YES. [2024-06-21 19:46:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 7605 events. 4173/7605 cut-off events. For 97121/97495 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 61504 event pairs, 1415 based on Foata normal form. 275/7696 useless extension candidates. Maximal degree in co-relation 34566. Up to 5570 conditions per place. [2024-06-21 19:46:56,193 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 101 selfloop transitions, 43 changer transitions 0/187 dead transitions. [2024-06-21 19:46:56,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 2408 flow [2024-06-21 19:46:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 19:46:56,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 19:46:56,194 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1965 flow. Second operand 5 states and 155 transitions. [2024-06-21 19:46:56,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 2408 flow [2024-06-21 19:46:56,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2344 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:56,506 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 2090 flow [2024-06-21 19:46:56,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2090, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-21 19:46:56,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-21 19:46:56,507 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 2090 flow [2024-06-21 19:46:56,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:56,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:56,507 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] [2024-06-21 19:46:56,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:46:56,508 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:56,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1297605077, now seen corresponding path program 2 times [2024-06-21 19:46:56,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:56,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101518584] [2024-06-21 19:46:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:56,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:56,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:56,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101518584] [2024-06-21 19:46:56,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101518584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:56,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:56,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327482709] [2024-06-21 19:46:56,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:56,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:56,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:56,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:46:56,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 2090 flow. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:56,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:56,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:46:56,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:57,744 INFO L124 PetriNetUnfolderBase]: 4206/7622 cut-off events. [2024-06-21 19:46:57,744 INFO L125 PetriNetUnfolderBase]: For 99858/100249 co-relation queries the response was YES. [2024-06-21 19:46:57,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35117 conditions, 7622 events. 4206/7622 cut-off events. For 99858/100249 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 61504 event pairs, 1445 based on Foata normal form. 276/7677 useless extension candidates. Maximal degree in co-relation 35056. Up to 5519 conditions per place. [2024-06-21 19:46:57,809 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 94 selfloop transitions, 45 changer transitions 0/182 dead transitions. [2024-06-21 19:46:57,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 2516 flow [2024-06-21 19:46:57,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 19:46:57,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 19:46:57,811 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 2090 flow. Second operand 5 states and 143 transitions. [2024-06-21 19:46:57,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 2516 flow [2024-06-21 19:46:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 2468 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:58,099 INFO L231 Difference]: Finished difference. Result has 135 places, 166 transitions, 2212 flow [2024-06-21 19:46:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2212, PETRI_PLACES=135, PETRI_TRANSITIONS=166} [2024-06-21 19:46:58,099 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-21 19:46:58,099 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 166 transitions, 2212 flow [2024-06-21 19:46:58,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:58,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:58,100 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] [2024-06-21 19:46:58,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:46:58,100 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2083832285, now seen corresponding path program 1 times [2024-06-21 19:46:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927474357] [2024-06-21 19:46:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:58,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:58,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927474357] [2024-06-21 19:46:58,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927474357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:58,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:58,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:58,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569228793] [2024-06-21 19:46:58,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:58,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:58,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:58,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:58,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 166 transitions, 2212 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:58,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:58,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:58,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:59,201 INFO L124 PetriNetUnfolderBase]: 4795/8395 cut-off events. [2024-06-21 19:46:59,201 INFO L125 PetriNetUnfolderBase]: For 106100/106100 co-relation queries the response was YES. [2024-06-21 19:46:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39695 conditions, 8395 events. 4795/8395 cut-off events. For 106100/106100 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 66352 event pairs, 1903 based on Foata normal form. 2/8218 useless extension candidates. Maximal degree in co-relation 39633. Up to 6938 conditions per place. [2024-06-21 19:46:59,274 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 176 selfloop transitions, 17 changer transitions 0/205 dead transitions. [2024-06-21 19:46:59,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2866 flow [2024-06-21 19:46:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 19:46:59,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-21 19:46:59,275 INFO L175 Difference]: Start difference. First operand has 135 places, 166 transitions, 2212 flow. Second operand 5 states and 148 transitions. [2024-06-21 19:46:59,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2866 flow [2024-06-21 19:46:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 205 transitions, 2811 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 19:46:59,553 INFO L231 Difference]: Finished difference. Result has 140 places, 176 transitions, 2352 flow [2024-06-21 19:46:59,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2352, PETRI_PLACES=140, PETRI_TRANSITIONS=176} [2024-06-21 19:46:59,554 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-21 19:46:59,554 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 176 transitions, 2352 flow [2024-06-21 19:46:59,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:59,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:59,555 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] [2024-06-21 19:46:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:46:59,555 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:46:59,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1271680955, now seen corresponding path program 2 times [2024-06-21 19:46:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:59,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85243779] [2024-06-21 19:46:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:59,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:59,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:59,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85243779] [2024-06-21 19:46:59,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85243779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:59,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:59,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:59,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636686080] [2024-06-21 19:46:59,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:59,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:59,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:46:59,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 176 transitions, 2352 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:59,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:59,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:46:59,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:00,679 INFO L124 PetriNetUnfolderBase]: 4788/8343 cut-off events. [2024-06-21 19:47:00,679 INFO L125 PetriNetUnfolderBase]: For 113037/113037 co-relation queries the response was YES. [2024-06-21 19:47:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40314 conditions, 8343 events. 4788/8343 cut-off events. For 113037/113037 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 65524 event pairs, 2000 based on Foata normal form. 2/8162 useless extension candidates. Maximal degree in co-relation 40248. Up to 6934 conditions per place. [2024-06-21 19:47:00,748 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 167 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2024-06-21 19:47:00,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 200 transitions, 2891 flow [2024-06-21 19:47:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-06-21 19:47:00,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-06-21 19:47:00,749 INFO L175 Difference]: Start difference. First operand has 140 places, 176 transitions, 2352 flow. Second operand 5 states and 139 transitions. [2024-06-21 19:47:00,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 200 transitions, 2891 flow [2024-06-21 19:47:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 2853 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-21 19:47:01,064 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 2446 flow [2024-06-21 19:47:01,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2446, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-21 19:47:01,064 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-21 19:47:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 2446 flow [2024-06-21 19:47:01,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:01,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:01,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:47:01,065 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -351604788, now seen corresponding path program 1 times [2024-06-21 19:47:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678110840] [2024-06-21 19:47:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678110840] [2024-06-21 19:47:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678110840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790641796] [2024-06-21 19:47:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:01,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:47:01,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 2446 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-21 19:47:01,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:01,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:47:01,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:02,534 INFO L124 PetriNetUnfolderBase]: 4289/7761 cut-off events. [2024-06-21 19:47:02,534 INFO L125 PetriNetUnfolderBase]: For 126400/126793 co-relation queries the response was YES. [2024-06-21 19:47:02,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37507 conditions, 7761 events. 4289/7761 cut-off events. For 126400/126793 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 62746 event pairs, 1286 based on Foata normal form. 312/7867 useless extension candidates. Maximal degree in co-relation 37437. Up to 5460 conditions per place. [2024-06-21 19:47:02,606 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 106 selfloop transitions, 52 changer transitions 0/206 dead transitions. [2024-06-21 19:47:02,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 206 transitions, 2905 flow [2024-06-21 19:47:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 19:47:02,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-21 19:47:02,609 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 2446 flow. Second operand 5 states and 146 transitions. [2024-06-21 19:47:02,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 206 transitions, 2905 flow [2024-06-21 19:47:02,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2800 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:02,923 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2584 flow [2024-06-21 19:47:02,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2584, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-21 19:47:02,924 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 19:47:02,924 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2584 flow [2024-06-21 19:47:02,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-21 19:47:02,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:02,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:47:02,924 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 150267852, now seen corresponding path program 2 times [2024-06-21 19:47:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512367206] [2024-06-21 19:47:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:03,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:03,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512367206] [2024-06-21 19:47:03,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512367206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:03,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:03,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635408597] [2024-06-21 19:47:03,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:03,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:03,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 19:47:03,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2584 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-21 19:47:03,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:03,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 19:47:03,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:04,408 INFO L124 PetriNetUnfolderBase]: 4253/7737 cut-off events. [2024-06-21 19:47:04,408 INFO L125 PetriNetUnfolderBase]: For 130752/131144 co-relation queries the response was YES. [2024-06-21 19:47:04,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38283 conditions, 7737 events. 4253/7737 cut-off events. For 130752/131144 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 62661 event pairs, 1408 based on Foata normal form. 284/7803 useless extension candidates. Maximal degree in co-relation 38210. Up to 5640 conditions per place. [2024-06-21 19:47:04,483 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 108 selfloop transitions, 47 changer transitions 0/203 dead transitions. [2024-06-21 19:47:04,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2934 flow [2024-06-21 19:47:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 19:47:04,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-21 19:47:04,484 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2584 flow. Second operand 5 states and 143 transitions. [2024-06-21 19:47:04,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2934 flow [2024-06-21 19:47:04,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 203 transitions, 2861 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:04,874 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 2615 flow [2024-06-21 19:47:04,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2615, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-21 19:47:04,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-21 19:47:04,874 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 2615 flow [2024-06-21 19:47:04,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2024-06-21 19:47:04,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:04,874 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, 1] [2024-06-21 19:47:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:47:04,875 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:04,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:04,875 INFO L85 PathProgramCache]: Analyzing trace with hash -174288756, now seen corresponding path program 1 times [2024-06-21 19:47:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:04,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110714454] [2024-06-21 19:47:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:05,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:05,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110714454] [2024-06-21 19:47:05,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110714454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:05,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:05,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870328215] [2024-06-21 19:47:05,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:05,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:05,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:05,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:05,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 2615 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:05,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:05,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:05,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:06,193 INFO L124 PetriNetUnfolderBase]: 4848/8518 cut-off events. [2024-06-21 19:47:06,193 INFO L125 PetriNetUnfolderBase]: For 122978/122978 co-relation queries the response was YES. [2024-06-21 19:47:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41948 conditions, 8518 events. 4848/8518 cut-off events. For 122978/122978 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 67584 event pairs, 1969 based on Foata normal form. 4/8338 useless extension candidates. Maximal degree in co-relation 41873. Up to 7014 conditions per place. [2024-06-21 19:47:06,268 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 184 selfloop transitions, 21 changer transitions 0/217 dead transitions. [2024-06-21 19:47:06,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 3177 flow [2024-06-21 19:47:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-21 19:47:06,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-06-21 19:47:06,269 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 2615 flow. Second operand 5 states and 149 transitions. [2024-06-21 19:47:06,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 3177 flow [2024-06-21 19:47:06,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 217 transitions, 3132 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:06,652 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2649 flow [2024-06-21 19:47:06,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-21 19:47:06,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-21 19:47:06,652 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2649 flow [2024-06-21 19:47:06,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:06,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:06,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:06,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:47:06,653 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:06,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -767015352, now seen corresponding path program 2 times [2024-06-21 19:47:06,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:06,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986480124] [2024-06-21 19:47:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:06,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:06,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986480124] [2024-06-21 19:47:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986480124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:06,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:06,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722814479] [2024-06-21 19:47:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:06,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:06,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:06,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 2649 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:06,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:08,061 INFO L124 PetriNetUnfolderBase]: 4836/8495 cut-off events. [2024-06-21 19:47:08,062 INFO L125 PetriNetUnfolderBase]: For 126954/126954 co-relation queries the response was YES. [2024-06-21 19:47:08,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41707 conditions, 8495 events. 4836/8495 cut-off events. For 126954/126954 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 67328 event pairs, 1895 based on Foata normal form. 4/8316 useless extension candidates. Maximal degree in co-relation 41630. Up to 7006 conditions per place. [2024-06-21 19:47:08,130 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 179 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2024-06-21 19:47:08,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 216 transitions, 3129 flow [2024-06-21 19:47:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 19:47:08,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2024-06-21 19:47:08,131 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2649 flow. Second operand 6 states and 166 transitions. [2024-06-21 19:47:08,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 216 transitions, 3129 flow [2024-06-21 19:47:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 3076 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 19:47:08,488 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2659 flow [2024-06-21 19:47:08,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2659, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-06-21 19:47:08,489 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-21 19:47:08,489 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2659 flow [2024-06-21 19:47:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:08,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:08,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:47:08,490 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1217115842, now seen corresponding path program 1 times [2024-06-21 19:47:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:08,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685205019] [2024-06-21 19:47:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:08,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685205019] [2024-06-21 19:47:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685205019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:08,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491968983] [2024-06-21 19:47:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:08,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:08,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 19:47:08,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2659 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:08,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:08,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 19:47:08,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:09,795 INFO L124 PetriNetUnfolderBase]: 4507/8037 cut-off events. [2024-06-21 19:47:09,796 INFO L125 PetriNetUnfolderBase]: For 133171/133258 co-relation queries the response was YES. [2024-06-21 19:47:09,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39575 conditions, 8037 events. 4507/8037 cut-off events. For 133171/133258 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 64500 event pairs, 1495 based on Foata normal form. 67/7932 useless extension candidates. Maximal degree in co-relation 39497. Up to 5502 conditions per place. [2024-06-21 19:47:09,860 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 134 selfloop transitions, 53 changer transitions 0/216 dead transitions. [2024-06-21 19:47:09,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 216 transitions, 3297 flow [2024-06-21 19:47:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-21 19:47:09,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5538461538461539 [2024-06-21 19:47:09,861 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2659 flow. Second operand 5 states and 144 transitions. [2024-06-21 19:47:09,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 216 transitions, 3297 flow [2024-06-21 19:47:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 216 transitions, 3224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:10,229 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2760 flow [2024-06-21 19:47:10,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2760, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2024-06-21 19:47:10,229 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 19:47:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2760 flow [2024-06-21 19:47:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:10,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:47:10,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:10,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 183403812, now seen corresponding path program 1 times [2024-06-21 19:47:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:10,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100088292] [2024-06-21 19:47:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:10,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:10,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100088292] [2024-06-21 19:47:10,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100088292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:10,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:10,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026506310] [2024-06-21 19:47:10,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:10,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:10,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2760 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:10,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:10,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:10,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:11,656 INFO L124 PetriNetUnfolderBase]: 4924/8659 cut-off events. [2024-06-21 19:47:11,656 INFO L125 PetriNetUnfolderBase]: For 143628/143636 co-relation queries the response was YES. [2024-06-21 19:47:11,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43656 conditions, 8659 events. 4924/8659 cut-off events. For 143628/143636 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68885 event pairs, 1656 based on Foata normal form. 10/8511 useless extension candidates. Maximal degree in co-relation 43578. Up to 6926 conditions per place. [2024-06-21 19:47:11,723 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 201 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-21 19:47:11,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 257 transitions, 3632 flow [2024-06-21 19:47:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:47:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:47:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-21 19:47:11,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-21 19:47:11,725 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2760 flow. Second operand 7 states and 213 transitions. [2024-06-21 19:47:11,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 257 transitions, 3632 flow [2024-06-21 19:47:12,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 257 transitions, 3618 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-21 19:47:12,124 INFO L231 Difference]: Finished difference. Result has 170 places, 203 transitions, 3021 flow [2024-06-21 19:47:12,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3021, PETRI_PLACES=170, PETRI_TRANSITIONS=203} [2024-06-21 19:47:12,125 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-21 19:47:12,125 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 203 transitions, 3021 flow [2024-06-21 19:47:12,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:12,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:12,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:12,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:47:12,125 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:12,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1971786324, now seen corresponding path program 2 times [2024-06-21 19:47:12,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:12,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820519310] [2024-06-21 19:47:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:12,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:12,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:12,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820519310] [2024-06-21 19:47:12,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820519310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:12,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:12,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503969363] [2024-06-21 19:47:12,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:12,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:12,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:12,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 203 transitions, 3021 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:12,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:12,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:13,564 INFO L124 PetriNetUnfolderBase]: 4917/8638 cut-off events. [2024-06-21 19:47:13,564 INFO L125 PetriNetUnfolderBase]: For 152399/152407 co-relation queries the response was YES. [2024-06-21 19:47:13,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44622 conditions, 8638 events. 4917/8638 cut-off events. For 152399/152407 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 68779 event pairs, 1657 based on Foata normal form. 10/8488 useless extension candidates. Maximal degree in co-relation 44540. Up to 6922 conditions per place. [2024-06-21 19:47:13,638 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 183 selfloop transitions, 48 changer transitions 0/243 dead transitions. [2024-06-21 19:47:13,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 243 transitions, 3724 flow [2024-06-21 19:47:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 19:47:13,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-21 19:47:13,639 INFO L175 Difference]: Start difference. First operand has 170 places, 203 transitions, 3021 flow. Second operand 6 states and 176 transitions. [2024-06-21 19:47:13,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 243 transitions, 3724 flow [2024-06-21 19:47:14,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 243 transitions, 3638 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:14,106 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 3148 flow [2024-06-21 19:47:14,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3148, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-21 19:47:14,107 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-21 19:47:14,107 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 3148 flow [2024-06-21 19:47:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:14,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:47:14,108 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:14,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash -976524846, now seen corresponding path program 3 times [2024-06-21 19:47:14,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:14,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210333607] [2024-06-21 19:47:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:14,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210333607] [2024-06-21 19:47:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210333607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:14,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:14,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507488232] [2024-06-21 19:47:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:14,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:14,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 3148 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:14,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:14,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:14,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:15,624 INFO L124 PetriNetUnfolderBase]: 4929/8677 cut-off events. [2024-06-21 19:47:15,625 INFO L125 PetriNetUnfolderBase]: For 155137/155156 co-relation queries the response was YES. [2024-06-21 19:47:15,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45421 conditions, 8677 events. 4929/8677 cut-off events. For 155137/155156 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 69126 event pairs, 1687 based on Foata normal form. 16/8526 useless extension candidates. Maximal degree in co-relation 45337. Up to 6854 conditions per place. [2024-06-21 19:47:15,707 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 191 selfloop transitions, 48 changer transitions 0/251 dead transitions. [2024-06-21 19:47:15,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 3938 flow [2024-06-21 19:47:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 19:47:15,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512820512820513 [2024-06-21 19:47:15,709 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 3148 flow. Second operand 6 states and 172 transitions. [2024-06-21 19:47:15,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 3938 flow [2024-06-21 19:47:16,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 251 transitions, 3863 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 19:47:16,148 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 3344 flow [2024-06-21 19:47:16,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3344, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2024-06-21 19:47:16,148 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-21 19:47:16,149 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 3344 flow [2024-06-21 19:47:16,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:16,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:16,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:16,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:47:16,149 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:16,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:16,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1974633316, now seen corresponding path program 4 times [2024-06-21 19:47:16,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:16,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700510134] [2024-06-21 19:47:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:16,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:16,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:16,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700510134] [2024-06-21 19:47:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700510134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592286507] [2024-06-21 19:47:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:16,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 3344 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:16,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:17,575 INFO L124 PetriNetUnfolderBase]: 4941/8665 cut-off events. [2024-06-21 19:47:17,575 INFO L125 PetriNetUnfolderBase]: For 169326/169401 co-relation queries the response was YES. [2024-06-21 19:47:17,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46391 conditions, 8665 events. 4941/8665 cut-off events. For 169326/169401 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 68896 event pairs, 1753 based on Foata normal form. 60/8555 useless extension candidates. Maximal degree in co-relation 46305. Up to 6862 conditions per place. [2024-06-21 19:47:17,662 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 181 selfloop transitions, 58 changer transitions 0/251 dead transitions. [2024-06-21 19:47:17,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 251 transitions, 4169 flow [2024-06-21 19:47:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 19:47:17,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-21 19:47:17,663 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 3344 flow. Second operand 6 states and 164 transitions. [2024-06-21 19:47:17,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 251 transitions, 4169 flow [2024-06-21 19:47:18,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 251 transitions, 4098 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:18,155 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 3567 flow [2024-06-21 19:47:18,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3567, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-21 19:47:18,155 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 19:47:18,155 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 3567 flow [2024-06-21 19:47:18,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:18,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:18,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:47:18,156 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:18,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1761963300, now seen corresponding path program 5 times [2024-06-21 19:47:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:18,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702212451] [2024-06-21 19:47:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:18,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702212451] [2024-06-21 19:47:18,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702212451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:18,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:18,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:18,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980603891] [2024-06-21 19:47:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:18,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 3567 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:18,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:19,671 INFO L124 PetriNetUnfolderBase]: 4934/8657 cut-off events. [2024-06-21 19:47:19,672 INFO L125 PetriNetUnfolderBase]: For 178109/178184 co-relation queries the response was YES. [2024-06-21 19:47:19,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46878 conditions, 8657 events. 4934/8657 cut-off events. For 178109/178184 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68959 event pairs, 1751 based on Foata normal form. 60/8546 useless extension candidates. Maximal degree in co-relation 46788. Up to 6858 conditions per place. [2024-06-21 19:47:19,749 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 180 selfloop transitions, 58 changer transitions 0/250 dead transitions. [2024-06-21 19:47:19,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 250 transitions, 4175 flow [2024-06-21 19:47:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 19:47:19,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-06-21 19:47:19,751 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 3567 flow. Second operand 6 states and 163 transitions. [2024-06-21 19:47:19,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 250 transitions, 4175 flow [2024-06-21 19:47:20,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 250 transitions, 4061 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:20,307 INFO L231 Difference]: Finished difference. Result has 190 places, 226 transitions, 3575 flow [2024-06-21 19:47:20,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3453, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3575, PETRI_PLACES=190, PETRI_TRANSITIONS=226} [2024-06-21 19:47:20,307 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-21 19:47:20,308 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 226 transitions, 3575 flow [2024-06-21 19:47:20,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:20,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:20,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:20,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:47:20,308 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:20,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash 23696820, now seen corresponding path program 1 times [2024-06-21 19:47:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:20,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234988911] [2024-06-21 19:47:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:20,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234988911] [2024-06-21 19:47:20,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234988911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:20,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:20,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891198131] [2024-06-21 19:47:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:20,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:20,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:20,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:20,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 226 transitions, 3575 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:20,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:20,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:20,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:21,622 INFO L124 PetriNetUnfolderBase]: 4946/8645 cut-off events. [2024-06-21 19:47:21,622 INFO L125 PetriNetUnfolderBase]: For 184185/184187 co-relation queries the response was YES. [2024-06-21 19:47:21,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47393 conditions, 8645 events. 4946/8645 cut-off events. For 184185/184187 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 68299 event pairs, 1962 based on Foata normal form. 4/8477 useless extension candidates. Maximal degree in co-relation 47300. Up to 6968 conditions per place. [2024-06-21 19:47:21,716 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 220 selfloop transitions, 38 changer transitions 0/270 dead transitions. [2024-06-21 19:47:21,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 270 transitions, 4509 flow [2024-06-21 19:47:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-21 19:47:21,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-21 19:47:21,717 INFO L175 Difference]: Start difference. First operand has 190 places, 226 transitions, 3575 flow. Second operand 6 states and 178 transitions. [2024-06-21 19:47:21,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 270 transitions, 4509 flow [2024-06-21 19:47:22,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 270 transitions, 4416 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:22,537 INFO L231 Difference]: Finished difference. Result has 193 places, 233 transitions, 3720 flow [2024-06-21 19:47:22,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3720, PETRI_PLACES=193, PETRI_TRANSITIONS=233} [2024-06-21 19:47:22,538 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 138 predicate places. [2024-06-21 19:47:22,538 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 233 transitions, 3720 flow [2024-06-21 19:47:22,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:22,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:22,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:47:22,538 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:22,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1107989406, now seen corresponding path program 2 times [2024-06-21 19:47:22,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:22,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519640905] [2024-06-21 19:47:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:22,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519640905] [2024-06-21 19:47:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519640905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:22,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143202995] [2024-06-21 19:47:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:22,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:22,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 233 transitions, 3720 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:22,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:22,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:22,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:23,864 INFO L124 PetriNetUnfolderBase]: 4977/8692 cut-off events. [2024-06-21 19:47:23,864 INFO L125 PetriNetUnfolderBase]: For 195385/195387 co-relation queries the response was YES. [2024-06-21 19:47:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48558 conditions, 8692 events. 4977/8692 cut-off events. For 195385/195387 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68684 event pairs, 1969 based on Foata normal form. 4/8523 useless extension candidates. Maximal degree in co-relation 48464. Up to 6988 conditions per place. [2024-06-21 19:47:23,956 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 215 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-21 19:47:23,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 270 transitions, 4616 flow [2024-06-21 19:47:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 19:47:23,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 19:47:23,957 INFO L175 Difference]: Start difference. First operand has 193 places, 233 transitions, 3720 flow. Second operand 6 states and 173 transitions. [2024-06-21 19:47:23,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 270 transitions, 4616 flow [2024-06-21 19:47:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 4508 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-21 19:47:24,702 INFO L231 Difference]: Finished difference. Result has 199 places, 239 transitions, 3864 flow [2024-06-21 19:47:24,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3864, PETRI_PLACES=199, PETRI_TRANSITIONS=239} [2024-06-21 19:47:24,702 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 19:47:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 239 transitions, 3864 flow [2024-06-21 19:47:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:24,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:24,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:47:24,703 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1516533628, now seen corresponding path program 3 times [2024-06-21 19:47:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035620525] [2024-06-21 19:47:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:24,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:24,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035620525] [2024-06-21 19:47:24,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035620525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:24,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:24,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932831519] [2024-06-21 19:47:24,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:24,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:24,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 239 transitions, 3864 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:24,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:24,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:24,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:26,090 INFO L124 PetriNetUnfolderBase]: 4970/8709 cut-off events. [2024-06-21 19:47:26,090 INFO L125 PetriNetUnfolderBase]: For 201363/201365 co-relation queries the response was YES. [2024-06-21 19:47:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49123 conditions, 8709 events. 4970/8709 cut-off events. For 201363/201365 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 69242 event pairs, 1818 based on Foata normal form. 4/8540 useless extension candidates. Maximal degree in co-relation 49026. Up to 7089 conditions per place. [2024-06-21 19:47:26,184 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 219 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-21 19:47:26,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 267 transitions, 4544 flow [2024-06-21 19:47:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-21 19:47:26,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-21 19:47:26,185 INFO L175 Difference]: Start difference. First operand has 199 places, 239 transitions, 3864 flow. Second operand 5 states and 151 transitions. [2024-06-21 19:47:26,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 267 transitions, 4544 flow [2024-06-21 19:47:26,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 267 transitions, 4401 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 19:47:26,877 INFO L231 Difference]: Finished difference. Result has 202 places, 239 transitions, 3803 flow [2024-06-21 19:47:26,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3803, PETRI_PLACES=202, PETRI_TRANSITIONS=239} [2024-06-21 19:47:26,878 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 147 predicate places. [2024-06-21 19:47:26,878 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 239 transitions, 3803 flow [2024-06-21 19:47:26,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:26,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:26,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:47:26,878 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:26,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash -704382298, now seen corresponding path program 4 times [2024-06-21 19:47:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895792569] [2024-06-21 19:47:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:26,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:26,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895792569] [2024-06-21 19:47:26,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895792569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:26,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:26,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:26,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945210688] [2024-06-21 19:47:26,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:26,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:26,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:26,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:26,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:26,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 239 transitions, 3803 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:26,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:26,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:26,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:28,312 INFO L124 PetriNetUnfolderBase]: 4963/8684 cut-off events. [2024-06-21 19:47:28,312 INFO L125 PetriNetUnfolderBase]: For 209977/209979 co-relation queries the response was YES. [2024-06-21 19:47:28,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49018 conditions, 8684 events. 4963/8684 cut-off events. For 209977/209979 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 68672 event pairs, 1968 based on Foata normal form. 4/8516 useless extension candidates. Maximal degree in co-relation 48920. Up to 7085 conditions per place. [2024-06-21 19:47:28,391 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 216 selfloop transitions, 44 changer transitions 0/272 dead transitions. [2024-06-21 19:47:28,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 272 transitions, 4547 flow [2024-06-21 19:47:28,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:47:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:47:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 19:47:28,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-21 19:47:28,392 INFO L175 Difference]: Start difference. First operand has 202 places, 239 transitions, 3803 flow. Second operand 7 states and 193 transitions. [2024-06-21 19:47:28,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 272 transitions, 4547 flow [2024-06-21 19:47:29,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 272 transitions, 4465 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 19:47:29,072 INFO L231 Difference]: Finished difference. Result has 205 places, 242 transitions, 3897 flow [2024-06-21 19:47:29,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3897, PETRI_PLACES=205, PETRI_TRANSITIONS=242} [2024-06-21 19:47:29,072 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 150 predicate places. [2024-06-21 19:47:29,072 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 242 transitions, 3897 flow [2024-06-21 19:47:29,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:29,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:29,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:29,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:47:29,074 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:29,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 369050722, now seen corresponding path program 5 times [2024-06-21 19:47:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873536026] [2024-06-21 19:47:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873536026] [2024-06-21 19:47:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873536026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:29,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:47:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681476525] [2024-06-21 19:47:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:47:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:47:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:47:29,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:29,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 242 transitions, 3897 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:29,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:29,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:29,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:30,408 INFO L124 PetriNetUnfolderBase]: 4956/8629 cut-off events. [2024-06-21 19:47:30,408 INFO L125 PetriNetUnfolderBase]: For 218840/218856 co-relation queries the response was YES. [2024-06-21 19:47:30,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49291 conditions, 8629 events. 4956/8629 cut-off events. For 218840/218856 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 68139 event pairs, 2021 based on Foata normal form. 18/8469 useless extension candidates. Maximal degree in co-relation 49192. Up to 6976 conditions per place. [2024-06-21 19:47:30,506 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 204 selfloop transitions, 50 changer transitions 0/266 dead transitions. [2024-06-21 19:47:30,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 266 transitions, 4599 flow [2024-06-21 19:47:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 19:47:30,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224358974358975 [2024-06-21 19:47:30,507 INFO L175 Difference]: Start difference. First operand has 205 places, 242 transitions, 3897 flow. Second operand 6 states and 163 transitions. [2024-06-21 19:47:30,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 266 transitions, 4599 flow [2024-06-21 19:47:31,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 266 transitions, 4468 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 19:47:31,403 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 3944 flow [2024-06-21 19:47:31,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3944, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-21 19:47:31,404 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2024-06-21 19:47:31,404 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 3944 flow [2024-06-21 19:47:31,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:31,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:31,404 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, 1, 1, 1] [2024-06-21 19:47:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:47:31,405 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:31,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1506051009, now seen corresponding path program 1 times [2024-06-21 19:47:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:31,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800331478] [2024-06-21 19:47:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:31,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:31,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:31,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800331478] [2024-06-21 19:47:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800331478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:31,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:31,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497929911] [2024-06-21 19:47:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:31,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:31,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 19:47:31,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:31,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:31,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 19:47:31,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:33,286 INFO L124 PetriNetUnfolderBase]: 4658/8215 cut-off events. [2024-06-21 19:47:33,286 INFO L125 PetriNetUnfolderBase]: For 229572/229666 co-relation queries the response was YES. [2024-06-21 19:47:33,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47093 conditions, 8215 events. 4658/8215 cut-off events. For 229572/229666 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 64894 event pairs, 1578 based on Foata normal form. 78/8130 useless extension candidates. Maximal degree in co-relation 46993. Up to 5631 conditions per place. [2024-06-21 19:47:33,385 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 173 selfloop transitions, 59 changer transitions 0/272 dead transitions. [2024-06-21 19:47:33,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 272 transitions, 4632 flow [2024-06-21 19:47:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:47:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:47:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 19:47:33,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-21 19:47:33,386 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 3944 flow. Second operand 5 states and 146 transitions. [2024-06-21 19:47:33,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 272 transitions, 4632 flow [2024-06-21 19:47:34,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 272 transitions, 4510 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:34,173 INFO L231 Difference]: Finished difference. Result has 209 places, 248 transitions, 4003 flow [2024-06-21 19:47:34,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4003, PETRI_PLACES=209, PETRI_TRANSITIONS=248} [2024-06-21 19:47:34,173 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 154 predicate places. [2024-06-21 19:47:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 248 transitions, 4003 flow [2024-06-21 19:47:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:34,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:34,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:47:34,174 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1385637008, now seen corresponding path program 1 times [2024-06-21 19:47:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820981913] [2024-06-21 19:47:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:34,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:34,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820981913] [2024-06-21 19:47:34,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820981913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:34,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:34,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:34,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625492371] [2024-06-21 19:47:34,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:34,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:34,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:34,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 248 transitions, 4003 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:34,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:34,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:34,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:35,793 INFO L124 PetriNetUnfolderBase]: 5383/9426 cut-off events. [2024-06-21 19:47:35,793 INFO L125 PetriNetUnfolderBase]: For 270493/270495 co-relation queries the response was YES. [2024-06-21 19:47:35,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55392 conditions, 9426 events. 5383/9426 cut-off events. For 270493/270495 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 75838 event pairs, 1002 based on Foata normal form. 12/9287 useless extension candidates. Maximal degree in co-relation 55290. Up to 6384 conditions per place. [2024-06-21 19:47:35,894 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 206 selfloop transitions, 91 changer transitions 0/309 dead transitions. [2024-06-21 19:47:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 309 transitions, 5157 flow [2024-06-21 19:47:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:47:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:47:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 19:47:35,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-21 19:47:35,896 INFO L175 Difference]: Start difference. First operand has 209 places, 248 transitions, 4003 flow. Second operand 6 states and 187 transitions. [2024-06-21 19:47:35,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 309 transitions, 5157 flow [2024-06-21 19:47:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 309 transitions, 5060 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 19:47:36,962 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 4501 flow [2024-06-21 19:47:36,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4501, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-06-21 19:47:36,963 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2024-06-21 19:47:36,963 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 4501 flow [2024-06-21 19:47:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:36,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:36,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:36,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:47:36,964 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:36,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -895337374, now seen corresponding path program 2 times [2024-06-21 19:47:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040077863] [2024-06-21 19:47:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040077863] [2024-06-21 19:47:37,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040077863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:37,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:37,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453159973] [2024-06-21 19:47:37,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:37,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:37,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:37,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:37,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:37,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:37,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:38,637 INFO L124 PetriNetUnfolderBase]: 5352/9281 cut-off events. [2024-06-21 19:47:38,637 INFO L125 PetriNetUnfolderBase]: For 284323/284325 co-relation queries the response was YES. [2024-06-21 19:47:38,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56115 conditions, 9281 events. 5352/9281 cut-off events. For 284323/284325 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 73125 event pairs, 1611 based on Foata normal form. 12/9153 useless extension candidates. Maximal degree in co-relation 56010. Up to 6372 conditions per place. [2024-06-21 19:47:38,746 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 194 selfloop transitions, 112 changer transitions 0/318 dead transitions. [2024-06-21 19:47:38,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 318 transitions, 5467 flow [2024-06-21 19:47:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-21 19:47:38,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600961538461539 [2024-06-21 19:47:38,748 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 4501 flow. Second operand 8 states and 233 transitions. [2024-06-21 19:47:38,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 318 transitions, 5467 flow [2024-06-21 19:47:39,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 318 transitions, 5342 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:39,511 INFO L231 Difference]: Finished difference. Result has 219 places, 270 transitions, 4726 flow [2024-06-21 19:47:39,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4384, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=219, PETRI_TRANSITIONS=270} [2024-06-21 19:47:39,512 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-06-21 19:47:39,512 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 270 transitions, 4726 flow [2024-06-21 19:47:39,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:39,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:39,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:39,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:47:39,512 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:39,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash 648080358, now seen corresponding path program 3 times [2024-06-21 19:47:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099979266] [2024-06-21 19:47:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:39,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:39,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099979266] [2024-06-21 19:47:39,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099979266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:39,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:39,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:39,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977411409] [2024-06-21 19:47:39,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:39,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:39,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:39,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:39,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:39,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:39,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 270 transitions, 4726 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:39,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:39,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:41,126 INFO L124 PetriNetUnfolderBase]: 5456/9559 cut-off events. [2024-06-21 19:47:41,126 INFO L125 PetriNetUnfolderBase]: For 293024/293024 co-relation queries the response was YES. [2024-06-21 19:47:41,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58272 conditions, 9559 events. 5456/9559 cut-off events. For 293024/293024 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 77122 event pairs, 1299 based on Foata normal form. 4/9378 useless extension candidates. Maximal degree in co-relation 58166. Up to 6751 conditions per place. [2024-06-21 19:47:41,237 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 266 selfloop transitions, 65 changer transitions 0/343 dead transitions. [2024-06-21 19:47:41,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 343 transitions, 6009 flow [2024-06-21 19:47:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-21 19:47:41,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721153846153846 [2024-06-21 19:47:41,239 INFO L175 Difference]: Start difference. First operand has 219 places, 270 transitions, 4726 flow. Second operand 8 states and 238 transitions. [2024-06-21 19:47:41,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 343 transitions, 6009 flow [2024-06-21 19:47:42,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 343 transitions, 5706 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 19:47:42,272 INFO L231 Difference]: Finished difference. Result has 223 places, 277 transitions, 4787 flow [2024-06-21 19:47:42,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4787, PETRI_PLACES=223, PETRI_TRANSITIONS=277} [2024-06-21 19:47:42,272 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 168 predicate places. [2024-06-21 19:47:42,272 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 277 transitions, 4787 flow [2024-06-21 19:47:42,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:42,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:42,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:42,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:47:42,273 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:42,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:42,273 INFO L85 PathProgramCache]: Analyzing trace with hash 392423388, now seen corresponding path program 4 times [2024-06-21 19:47:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:42,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854005777] [2024-06-21 19:47:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:42,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:42,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854005777] [2024-06-21 19:47:42,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854005777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:42,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:42,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357032462] [2024-06-21 19:47:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:42,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:42,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 277 transitions, 4787 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:42,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:42,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:44,021 INFO L124 PetriNetUnfolderBase]: 5476/9559 cut-off events. [2024-06-21 19:47:44,021 INFO L125 PetriNetUnfolderBase]: For 276324/276324 co-relation queries the response was YES. [2024-06-21 19:47:44,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57632 conditions, 9559 events. 5476/9559 cut-off events. For 276324/276324 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 76811 event pairs, 1334 based on Foata normal form. 4/9357 useless extension candidates. Maximal degree in co-relation 57524. Up to 6759 conditions per place. [2024-06-21 19:47:44,116 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 253 selfloop transitions, 70 changer transitions 0/335 dead transitions. [2024-06-21 19:47:44,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 335 transitions, 5811 flow [2024-06-21 19:47:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 19:47:44,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-21 19:47:44,117 INFO L175 Difference]: Start difference. First operand has 223 places, 277 transitions, 4787 flow. Second operand 8 states and 229 transitions. [2024-06-21 19:47:44,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 335 transitions, 5811 flow [2024-06-21 19:47:44,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 5744 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:44,781 INFO L231 Difference]: Finished difference. Result has 229 places, 281 transitions, 4968 flow [2024-06-21 19:47:44,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4968, PETRI_PLACES=229, PETRI_TRANSITIONS=281} [2024-06-21 19:47:44,782 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 174 predicate places. [2024-06-21 19:47:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 281 transitions, 4968 flow [2024-06-21 19:47:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:44,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:44,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:44,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:47:44,782 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:44,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1085159629, now seen corresponding path program 1 times [2024-06-21 19:47:44,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:44,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182165787] [2024-06-21 19:47:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:44,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182165787] [2024-06-21 19:47:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182165787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265837404] [2024-06-21 19:47:45,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:45,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:45,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 281 transitions, 4968 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:45,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:45,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:45,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:46,553 INFO L124 PetriNetUnfolderBase]: 5484/9602 cut-off events. [2024-06-21 19:47:46,554 INFO L125 PetriNetUnfolderBase]: For 294264/294283 co-relation queries the response was YES. [2024-06-21 19:47:46,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58627 conditions, 9602 events. 5484/9602 cut-off events. For 294264/294283 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 77483 event pairs, 1802 based on Foata normal form. 22/9427 useless extension candidates. Maximal degree in co-relation 58517. Up to 7691 conditions per place. [2024-06-21 19:47:46,667 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 253 selfloop transitions, 54 changer transitions 0/319 dead transitions. [2024-06-21 19:47:46,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 319 transitions, 5814 flow [2024-06-21 19:47:46,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 19:47:46,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-21 19:47:46,668 INFO L175 Difference]: Start difference. First operand has 229 places, 281 transitions, 4968 flow. Second operand 8 states and 215 transitions. [2024-06-21 19:47:46,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 319 transitions, 5814 flow [2024-06-21 19:47:47,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 319 transitions, 5704 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:47,633 INFO L231 Difference]: Finished difference. Result has 234 places, 283 transitions, 5029 flow [2024-06-21 19:47:47,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5029, PETRI_PLACES=234, PETRI_TRANSITIONS=283} [2024-06-21 19:47:47,633 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-21 19:47:47,634 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 283 transitions, 5029 flow [2024-06-21 19:47:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:47,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:47,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:47,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:47:47,634 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:47,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash -6022301, now seen corresponding path program 2 times [2024-06-21 19:47:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:47,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397207966] [2024-06-21 19:47:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:47,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397207966] [2024-06-21 19:47:47,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397207966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:47,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:47,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385808532] [2024-06-21 19:47:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:47,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:47,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 283 transitions, 5029 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:47,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:47,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:47,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:49,476 INFO L124 PetriNetUnfolderBase]: 5524/9670 cut-off events. [2024-06-21 19:47:49,477 INFO L125 PetriNetUnfolderBase]: For 301917/301936 co-relation queries the response was YES. [2024-06-21 19:47:49,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59186 conditions, 9670 events. 5524/9670 cut-off events. For 301917/301936 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 77948 event pairs, 1806 based on Foata normal form. 18/9491 useless extension candidates. Maximal degree in co-relation 59075. Up to 7723 conditions per place. [2024-06-21 19:47:49,589 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 250 selfloop transitions, 60 changer transitions 0/322 dead transitions. [2024-06-21 19:47:49,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 5940 flow [2024-06-21 19:47:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 19:47:49,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-21 19:47:49,591 INFO L175 Difference]: Start difference. First operand has 234 places, 283 transitions, 5029 flow. Second operand 8 states and 214 transitions. [2024-06-21 19:47:49,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 5940 flow [2024-06-21 19:47:50,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 5786 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 19:47:50,654 INFO L231 Difference]: Finished difference. Result has 238 places, 287 transitions, 5123 flow [2024-06-21 19:47:50,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5123, PETRI_PLACES=238, PETRI_TRANSITIONS=287} [2024-06-21 19:47:50,655 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-21 19:47:50,655 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 287 transitions, 5123 flow [2024-06-21 19:47:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:50,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:50,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:50,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:47:50,655 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:50,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1715680585, now seen corresponding path program 3 times [2024-06-21 19:47:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887624696] [2024-06-21 19:47:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:50,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887624696] [2024-06-21 19:47:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887624696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:50,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:50,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268894522] [2024-06-21 19:47:50,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:50,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:50,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 287 transitions, 5123 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:50,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:50,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:52,562 INFO L124 PetriNetUnfolderBase]: 5512/9656 cut-off events. [2024-06-21 19:47:52,562 INFO L125 PetriNetUnfolderBase]: For 305626/305645 co-relation queries the response was YES. [2024-06-21 19:47:52,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58941 conditions, 9656 events. 5512/9656 cut-off events. For 305626/305645 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 78124 event pairs, 1796 based on Foata normal form. 18/9479 useless extension candidates. Maximal degree in co-relation 58829. Up to 7715 conditions per place. [2024-06-21 19:47:52,664 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 246 selfloop transitions, 62 changer transitions 0/320 dead transitions. [2024-06-21 19:47:52,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 320 transitions, 5835 flow [2024-06-21 19:47:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 19:47:52,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 19:47:52,666 INFO L175 Difference]: Start difference. First operand has 238 places, 287 transitions, 5123 flow. Second operand 8 states and 212 transitions. [2024-06-21 19:47:52,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 320 transitions, 5835 flow [2024-06-21 19:47:53,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 320 transitions, 5695 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:53,687 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 5130 flow [2024-06-21 19:47:53,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5130, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2024-06-21 19:47:53,687 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-21 19:47:53,687 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 5130 flow [2024-06-21 19:47:53,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:53,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:53,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:53,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:47:53,688 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:53,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1141071106, now seen corresponding path program 5 times [2024-06-21 19:47:53,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:53,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187610419] [2024-06-21 19:47:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:53,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:53,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187610419] [2024-06-21 19:47:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187610419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:53,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:53,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:53,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029309815] [2024-06-21 19:47:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:53,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:53,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:53,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 5130 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:53,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:53,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:53,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:55,326 INFO L124 PetriNetUnfolderBase]: 5500/9563 cut-off events. [2024-06-21 19:47:55,327 INFO L125 PetriNetUnfolderBase]: For 307270/307270 co-relation queries the response was YES. [2024-06-21 19:47:55,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58576 conditions, 9563 events. 5500/9563 cut-off events. For 307270/307270 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 76490 event pairs, 1429 based on Foata normal form. 4/9355 useless extension candidates. Maximal degree in co-relation 58464. Up to 6779 conditions per place. [2024-06-21 19:47:55,443 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 235 selfloop transitions, 79 changer transitions 0/326 dead transitions. [2024-06-21 19:47:55,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 326 transitions, 6047 flow [2024-06-21 19:47:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:47:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:47:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-21 19:47:55,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2024-06-21 19:47:55,444 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 5130 flow. Second operand 7 states and 192 transitions. [2024-06-21 19:47:55,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 326 transitions, 6047 flow [2024-06-21 19:47:56,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 326 transitions, 5918 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:56,643 INFO L231 Difference]: Finished difference. Result has 242 places, 294 transitions, 5353 flow [2024-06-21 19:47:56,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5003, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5353, PETRI_PLACES=242, PETRI_TRANSITIONS=294} [2024-06-21 19:47:56,644 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-21 19:47:56,644 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 294 transitions, 5353 flow [2024-06-21 19:47:56,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:56,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:56,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:47:56,645 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:56,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2052996543, now seen corresponding path program 4 times [2024-06-21 19:47:56,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962329570] [2024-06-21 19:47:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:56,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:57,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:57,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962329570] [2024-06-21 19:47:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962329570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:57,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961315514] [2024-06-21 19:47:57,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:57,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:47:57,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 294 transitions, 5353 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:57,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:57,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:47:57,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:58,735 INFO L124 PetriNetUnfolderBase]: 5552/9708 cut-off events. [2024-06-21 19:47:58,736 INFO L125 PetriNetUnfolderBase]: For 308680/308699 co-relation queries the response was YES. [2024-06-21 19:47:58,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59921 conditions, 9708 events. 5552/9708 cut-off events. For 308680/308699 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 78364 event pairs, 1809 based on Foata normal form. 18/9518 useless extension candidates. Maximal degree in co-relation 59807. Up to 7644 conditions per place. [2024-06-21 19:47:58,851 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 256 selfloop transitions, 69 changer transitions 0/337 dead transitions. [2024-06-21 19:47:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 337 transitions, 6351 flow [2024-06-21 19:47:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-21 19:47:58,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 19:47:58,852 INFO L175 Difference]: Start difference. First operand has 242 places, 294 transitions, 5353 flow. Second operand 8 states and 216 transitions. [2024-06-21 19:47:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 337 transitions, 6351 flow [2024-06-21 19:47:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 337 transitions, 6251 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 19:47:59,828 INFO L231 Difference]: Finished difference. Result has 248 places, 298 transitions, 5472 flow [2024-06-21 19:47:59,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5253, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=248, PETRI_TRANSITIONS=298} [2024-06-21 19:47:59,828 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-21 19:47:59,828 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 298 transitions, 5472 flow [2024-06-21 19:47:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:59,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:59,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:59,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:47:59,829 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:47:59,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1517283074, now seen corresponding path program 6 times [2024-06-21 19:47:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:59,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711825826] [2024-06-21 19:47:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:59,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711825826] [2024-06-21 19:48:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711825826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426138344] [2024-06-21 19:48:00,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:00,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:00,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 298 transitions, 5472 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:00,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:00,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:00,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:01,662 INFO L124 PetriNetUnfolderBase]: 5572/9714 cut-off events. [2024-06-21 19:48:01,662 INFO L125 PetriNetUnfolderBase]: For 323886/323892 co-relation queries the response was YES. [2024-06-21 19:48:01,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60242 conditions, 9714 events. 5572/9714 cut-off events. For 323886/323892 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78154 event pairs, 1383 based on Foata normal form. 5/9485 useless extension candidates. Maximal degree in co-relation 60127. Up to 6482 conditions per place. [2024-06-21 19:48:01,775 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 237 selfloop transitions, 84 changer transitions 0/333 dead transitions. [2024-06-21 19:48:01,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 333 transitions, 6402 flow [2024-06-21 19:48:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 19:48:01,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-21 19:48:01,776 INFO L175 Difference]: Start difference. First operand has 248 places, 298 transitions, 5472 flow. Second operand 7 states and 187 transitions. [2024-06-21 19:48:01,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 333 transitions, 6402 flow [2024-06-21 19:48:02,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 6238 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:02,801 INFO L231 Difference]: Finished difference. Result has 251 places, 302 transitions, 5598 flow [2024-06-21 19:48:02,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5308, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5598, PETRI_PLACES=251, PETRI_TRANSITIONS=302} [2024-06-21 19:48:02,802 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-06-21 19:48:02,802 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 302 transitions, 5598 flow [2024-06-21 19:48:02,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:02,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:02,802 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, 1, 1, 1, 1] [2024-06-21 19:48:02,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:48:02,803 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:02,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash 11731149, now seen corresponding path program 5 times [2024-06-21 19:48:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:02,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73219162] [2024-06-21 19:48:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:02,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:03,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:03,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73219162] [2024-06-21 19:48:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73219162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:03,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:03,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764097644] [2024-06-21 19:48:03,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:03,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:03,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 302 transitions, 5598 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:03,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:03,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:04,810 INFO L124 PetriNetUnfolderBase]: 5560/9720 cut-off events. [2024-06-21 19:48:04,810 INFO L125 PetriNetUnfolderBase]: For 331130/331149 co-relation queries the response was YES. [2024-06-21 19:48:04,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60936 conditions, 9720 events. 5560/9720 cut-off events. For 331130/331149 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 78436 event pairs, 1817 based on Foata normal form. 18/9528 useless extension candidates. Maximal degree in co-relation 60819. Up to 7664 conditions per place. [2024-06-21 19:48:04,914 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 259 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-21 19:48:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 336 transitions, 6430 flow [2024-06-21 19:48:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-21 19:48:04,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-21 19:48:04,915 INFO L175 Difference]: Start difference. First operand has 251 places, 302 transitions, 5598 flow. Second operand 6 states and 174 transitions. [2024-06-21 19:48:04,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 336 transitions, 6430 flow [2024-06-21 19:48:05,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 336 transitions, 6297 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:05,984 INFO L231 Difference]: Finished difference. Result has 254 places, 302 transitions, 5605 flow [2024-06-21 19:48:05,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5605, PETRI_PLACES=254, PETRI_TRANSITIONS=302} [2024-06-21 19:48:05,985 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2024-06-21 19:48:05,985 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 302 transitions, 5605 flow [2024-06-21 19:48:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:05,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:05,985 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, 1, 1, 1] [2024-06-21 19:48:05,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:48:05,985 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:05,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1083972794, now seen corresponding path program 7 times [2024-06-21 19:48:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935402312] [2024-06-21 19:48:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:05,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:06,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935402312] [2024-06-21 19:48:06,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935402312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:06,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:06,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:06,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400554891] [2024-06-21 19:48:06,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:06,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:06,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:06,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:06,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:06,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 302 transitions, 5605 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:06,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:06,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:06,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:07,848 INFO L124 PetriNetUnfolderBase]: 5536/9686 cut-off events. [2024-06-21 19:48:07,848 INFO L125 PetriNetUnfolderBase]: For 342200/342212 co-relation queries the response was YES. [2024-06-21 19:48:07,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 9686 events. 5536/9686 cut-off events. For 342200/342212 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 78260 event pairs, 1765 based on Foata normal form. 15/9462 useless extension candidates. Maximal degree in co-relation 60049. Up to 7496 conditions per place. [2024-06-21 19:48:07,970 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 248 selfloop transitions, 71 changer transitions 0/331 dead transitions. [2024-06-21 19:48:07,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 331 transitions, 6473 flow [2024-06-21 19:48:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 19:48:07,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-21 19:48:07,972 INFO L175 Difference]: Start difference. First operand has 254 places, 302 transitions, 5605 flow. Second operand 7 states and 183 transitions. [2024-06-21 19:48:07,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 331 transitions, 6473 flow [2024-06-21 19:48:09,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 331 transitions, 6323 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:09,286 INFO L231 Difference]: Finished difference. Result has 257 places, 309 transitions, 5762 flow [2024-06-21 19:48:09,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5456, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5762, PETRI_PLACES=257, PETRI_TRANSITIONS=309} [2024-06-21 19:48:09,286 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-06-21 19:48:09,287 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 309 transitions, 5762 flow [2024-06-21 19:48:09,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:09,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:09,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:48:09,287 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:09,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1993523357, now seen corresponding path program 6 times [2024-06-21 19:48:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499078644] [2024-06-21 19:48:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:09,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499078644] [2024-06-21 19:48:09,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499078644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:09,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:09,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:09,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61371100] [2024-06-21 19:48:09,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:09,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:09,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:09,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:09,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 309 transitions, 5762 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:09,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:09,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:09,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:11,209 INFO L124 PetriNetUnfolderBase]: 5556/9690 cut-off events. [2024-06-21 19:48:11,209 INFO L125 PetriNetUnfolderBase]: For 344533/344612 co-relation queries the response was YES. [2024-06-21 19:48:11,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60825 conditions, 9690 events. 5556/9690 cut-off events. For 344533/344612 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 78277 event pairs, 1830 based on Foata normal form. 70/9561 useless extension candidates. Maximal degree in co-relation 60705. Up to 7648 conditions per place. [2024-06-21 19:48:11,330 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 257 selfloop transitions, 68 changer transitions 0/337 dead transitions. [2024-06-21 19:48:11,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 337 transitions, 6613 flow [2024-06-21 19:48:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 19:48:11,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-21 19:48:11,331 INFO L175 Difference]: Start difference. First operand has 257 places, 309 transitions, 5762 flow. Second operand 6 states and 165 transitions. [2024-06-21 19:48:11,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 337 transitions, 6613 flow [2024-06-21 19:48:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 337 transitions, 6384 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:12,481 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 5716 flow [2024-06-21 19:48:12,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5716, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-06-21 19:48:12,481 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 204 predicate places. [2024-06-21 19:48:12,481 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 5716 flow [2024-06-21 19:48:12,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:12,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:12,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:12,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:48:12,481 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:12,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1073202679, now seen corresponding path program 7 times [2024-06-21 19:48:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9182179] [2024-06-21 19:48:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:12,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9182179] [2024-06-21 19:48:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9182179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:12,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:12,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190303488] [2024-06-21 19:48:12,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:12,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:12,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:12,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:12,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 5716 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:12,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:12,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:12,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:14,676 INFO L124 PetriNetUnfolderBase]: 5544/9672 cut-off events. [2024-06-21 19:48:14,676 INFO L125 PetriNetUnfolderBase]: For 346850/346929 co-relation queries the response was YES. [2024-06-21 19:48:14,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60296 conditions, 9672 events. 5544/9672 cut-off events. For 346850/346929 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 78187 event pairs, 1846 based on Foata normal form. 70/9543 useless extension candidates. Maximal degree in co-relation 60175. Up to 7640 conditions per place. [2024-06-21 19:48:14,791 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 256 selfloop transitions, 68 changer transitions 0/336 dead transitions. [2024-06-21 19:48:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 336 transitions, 6436 flow [2024-06-21 19:48:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 19:48:14,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-21 19:48:14,792 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 5716 flow. Second operand 6 states and 164 transitions. [2024-06-21 19:48:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 336 transitions, 6436 flow [2024-06-21 19:48:15,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 336 transitions, 6225 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:15,898 INFO L231 Difference]: Finished difference. Result has 260 places, 311 transitions, 5650 flow [2024-06-21 19:48:15,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5650, PETRI_PLACES=260, PETRI_TRANSITIONS=311} [2024-06-21 19:48:15,899 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-06-21 19:48:15,899 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 311 transitions, 5650 flow [2024-06-21 19:48:15,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:15,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:15,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:48:15,899 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:15,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2050003574, now seen corresponding path program 8 times [2024-06-21 19:48:15,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568732691] [2024-06-21 19:48:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:15,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:16,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568732691] [2024-06-21 19:48:16,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568732691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:16,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284867657] [2024-06-21 19:48:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:16,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:16,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 311 transitions, 5650 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:16,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:17,792 INFO L124 PetriNetUnfolderBase]: 5564/9580 cut-off events. [2024-06-21 19:48:17,792 INFO L125 PetriNetUnfolderBase]: For 354052/354072 co-relation queries the response was YES. [2024-06-21 19:48:17,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60001 conditions, 9580 events. 5564/9580 cut-off events. For 354052/354072 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 76557 event pairs, 1714 based on Foata normal form. 7/9342 useless extension candidates. Maximal degree in co-relation 59881. Up to 6470 conditions per place. [2024-06-21 19:48:17,888 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 232 selfloop transitions, 97 changer transitions 0/341 dead transitions. [2024-06-21 19:48:17,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 341 transitions, 6683 flow [2024-06-21 19:48:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 19:48:17,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 19:48:17,889 INFO L175 Difference]: Start difference. First operand has 260 places, 311 transitions, 5650 flow. Second operand 7 states and 180 transitions. [2024-06-21 19:48:17,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 341 transitions, 6683 flow [2024-06-21 19:48:18,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 341 transitions, 6548 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:18,819 INFO L231 Difference]: Finished difference. Result has 264 places, 318 transitions, 5889 flow [2024-06-21 19:48:18,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5889, PETRI_PLACES=264, PETRI_TRANSITIONS=318} [2024-06-21 19:48:18,819 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 209 predicate places. [2024-06-21 19:48:18,820 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 318 transitions, 5889 flow [2024-06-21 19:48:18,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:18,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:18,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:48:18,820 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:18,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1260039396, now seen corresponding path program 9 times [2024-06-21 19:48:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968121441] [2024-06-21 19:48:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:19,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968121441] [2024-06-21 19:48:19,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968121441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:19,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:19,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441660755] [2024-06-21 19:48:19,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:19,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:19,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:19,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 318 transitions, 5889 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:19,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:19,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:19,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:20,672 INFO L124 PetriNetUnfolderBase]: 5552/9569 cut-off events. [2024-06-21 19:48:20,673 INFO L125 PetriNetUnfolderBase]: For 353242/353262 co-relation queries the response was YES. [2024-06-21 19:48:20,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60290 conditions, 9569 events. 5552/9569 cut-off events. For 353242/353262 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 76431 event pairs, 1712 based on Foata normal form. 7/9330 useless extension candidates. Maximal degree in co-relation 60168. Up to 6466 conditions per place. [2024-06-21 19:48:20,792 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 228 selfloop transitions, 99 changer transitions 0/339 dead transitions. [2024-06-21 19:48:20,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 339 transitions, 6683 flow [2024-06-21 19:48:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 19:48:20,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-21 19:48:20,793 INFO L175 Difference]: Start difference. First operand has 264 places, 318 transitions, 5889 flow. Second operand 7 states and 178 transitions. [2024-06-21 19:48:20,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 339 transitions, 6683 flow [2024-06-21 19:48:21,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 339 transitions, 6538 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-21 19:48:21,808 INFO L231 Difference]: Finished difference. Result has 270 places, 318 transitions, 5947 flow [2024-06-21 19:48:21,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5947, PETRI_PLACES=270, PETRI_TRANSITIONS=318} [2024-06-21 19:48:21,809 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 215 predicate places. [2024-06-21 19:48:21,809 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 318 transitions, 5947 flow [2024-06-21 19:48:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:48:21,810 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1301994111, now seen corresponding path program 1 times [2024-06-21 19:48:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165858198] [2024-06-21 19:48:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:22,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165858198] [2024-06-21 19:48:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165858198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:22,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:22,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735190445] [2024-06-21 19:48:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:22,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:22,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:22,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:22,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 19:48:22,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 318 transitions, 5947 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:22,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:22,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 19:48:22,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:23,913 INFO L124 PetriNetUnfolderBase]: 5184/9158 cut-off events. [2024-06-21 19:48:23,913 INFO L125 PetriNetUnfolderBase]: For 359717/359827 co-relation queries the response was YES. [2024-06-21 19:48:23,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58195 conditions, 9158 events. 5184/9158 cut-off events. For 359717/359827 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 74029 event pairs, 1629 based on Foata normal form. 90/9077 useless extension candidates. Maximal degree in co-relation 58070. Up to 6561 conditions per place. [2024-06-21 19:48:24,035 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 216 selfloop transitions, 74 changer transitions 0/342 dead transitions. [2024-06-21 19:48:24,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 342 transitions, 6712 flow [2024-06-21 19:48:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 19:48:24,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 19:48:24,036 INFO L175 Difference]: Start difference. First operand has 270 places, 318 transitions, 5947 flow. Second operand 6 states and 169 transitions. [2024-06-21 19:48:24,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 342 transitions, 6712 flow [2024-06-21 19:48:25,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 342 transitions, 6543 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:25,112 INFO L231 Difference]: Finished difference. Result has 273 places, 319 transitions, 5988 flow [2024-06-21 19:48:25,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5988, PETRI_PLACES=273, PETRI_TRANSITIONS=319} [2024-06-21 19:48:25,113 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 218 predicate places. [2024-06-21 19:48:25,113 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 319 transitions, 5988 flow [2024-06-21 19:48:25,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:25,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:25,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:48:25,113 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:25,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1694195951, now seen corresponding path program 1 times [2024-06-21 19:48:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670941414] [2024-06-21 19:48:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:25,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:25,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670941414] [2024-06-21 19:48:25,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670941414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:25,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:25,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:25,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932622721] [2024-06-21 19:48:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:25,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:25,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:25,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 319 transitions, 5988 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:25,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:25,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:25,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:27,128 INFO L124 PetriNetUnfolderBase]: 5761/10060 cut-off events. [2024-06-21 19:48:27,128 INFO L125 PetriNetUnfolderBase]: For 392601/392620 co-relation queries the response was YES. [2024-06-21 19:48:27,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64131 conditions, 10060 events. 5761/10060 cut-off events. For 392601/392620 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 81565 event pairs, 1472 based on Foata normal form. 22/9904 useless extension candidates. Maximal degree in co-relation 64004. Up to 7239 conditions per place. [2024-06-21 19:48:27,238 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 309 selfloop transitions, 55 changer transitions 0/376 dead transitions. [2024-06-21 19:48:27,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 7139 flow [2024-06-21 19:48:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:48:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:48:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-21 19:48:27,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-21 19:48:27,245 INFO L175 Difference]: Start difference. First operand has 273 places, 319 transitions, 5988 flow. Second operand 8 states and 225 transitions. [2024-06-21 19:48:27,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 7139 flow [2024-06-21 19:48:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 376 transitions, 6957 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:28,502 INFO L231 Difference]: Finished difference. Result has 278 places, 324 transitions, 6068 flow [2024-06-21 19:48:28,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5814, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=278, PETRI_TRANSITIONS=324} [2024-06-21 19:48:28,502 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 223 predicate places. [2024-06-21 19:48:28,502 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 324 transitions, 6068 flow [2024-06-21 19:48:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:28,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:48:28,503 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:28,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash -165062099, now seen corresponding path program 1 times [2024-06-21 19:48:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092657592] [2024-06-21 19:48:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:28,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:28,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092657592] [2024-06-21 19:48:28,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092657592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:28,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:28,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715500121] [2024-06-21 19:48:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:28,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:28,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:28,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 324 transitions, 6068 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:28,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:28,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:28,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:30,430 INFO L124 PetriNetUnfolderBase]: 5781/10084 cut-off events. [2024-06-21 19:48:30,430 INFO L125 PetriNetUnfolderBase]: For 381833/381835 co-relation queries the response was YES. [2024-06-21 19:48:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64247 conditions, 10084 events. 5781/10084 cut-off events. For 381833/381835 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 82059 event pairs, 2039 based on Foata normal form. 6/9870 useless extension candidates. Maximal degree in co-relation 64118. Up to 8123 conditions per place. [2024-06-21 19:48:30,560 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 302 selfloop transitions, 50 changer transitions 0/364 dead transitions. [2024-06-21 19:48:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 364 transitions, 7090 flow [2024-06-21 19:48:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 19:48:30,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-21 19:48:30,561 INFO L175 Difference]: Start difference. First operand has 278 places, 324 transitions, 6068 flow. Second operand 7 states and 199 transitions. [2024-06-21 19:48:30,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 364 transitions, 7090 flow [2024-06-21 19:48:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 364 transitions, 6921 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:32,101 INFO L231 Difference]: Finished difference. Result has 281 places, 326 transitions, 6040 flow [2024-06-21 19:48:32,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6040, PETRI_PLACES=281, PETRI_TRANSITIONS=326} [2024-06-21 19:48:32,101 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2024-06-21 19:48:32,101 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 326 transitions, 6040 flow [2024-06-21 19:48:32,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:32,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:32,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:48:32,102 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:32,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash -165062285, now seen corresponding path program 2 times [2024-06-21 19:48:32,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:32,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056821648] [2024-06-21 19:48:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:32,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:32,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056821648] [2024-06-21 19:48:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056821648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:32,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:32,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067477218] [2024-06-21 19:48:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:32,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:32,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:32,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 326 transitions, 6040 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:32,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:32,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:32,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:34,090 INFO L124 PetriNetUnfolderBase]: 5880/10251 cut-off events. [2024-06-21 19:48:34,090 INFO L125 PetriNetUnfolderBase]: For 410284/410303 co-relation queries the response was YES. [2024-06-21 19:48:34,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65781 conditions, 10251 events. 5880/10251 cut-off events. For 410284/410303 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 83181 event pairs, 1545 based on Foata normal form. 22/10105 useless extension candidates. Maximal degree in co-relation 65650. Up to 5685 conditions per place. [2024-06-21 19:48:34,220 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 294 selfloop transitions, 106 changer transitions 0/412 dead transitions. [2024-06-21 19:48:34,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 412 transitions, 8132 flow [2024-06-21 19:48:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-21 19:48:34,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 19:48:34,221 INFO L175 Difference]: Start difference. First operand has 281 places, 326 transitions, 6040 flow. Second operand 7 states and 208 transitions. [2024-06-21 19:48:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 412 transitions, 8132 flow [2024-06-21 19:48:35,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 412 transitions, 8008 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:35,757 INFO L231 Difference]: Finished difference. Result has 285 places, 343 transitions, 6563 flow [2024-06-21 19:48:35,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6563, PETRI_PLACES=285, PETRI_TRANSITIONS=343} [2024-06-21 19:48:35,758 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 230 predicate places. [2024-06-21 19:48:35,758 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 343 transitions, 6563 flow [2024-06-21 19:48:35,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:35,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:35,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:35,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:48:35,758 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:35,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1516707125, now seen corresponding path program 2 times [2024-06-21 19:48:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039122336] [2024-06-21 19:48:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:35,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039122336] [2024-06-21 19:48:35,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039122336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:35,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:35,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:35,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030221943] [2024-06-21 19:48:35,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:35,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:35,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:35,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:35,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 343 transitions, 6563 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:35,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:35,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:35,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:37,915 INFO L124 PetriNetUnfolderBase]: 5932/10325 cut-off events. [2024-06-21 19:48:37,915 INFO L125 PetriNetUnfolderBase]: For 432845/432847 co-relation queries the response was YES. [2024-06-21 19:48:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68412 conditions, 10325 events. 5932/10325 cut-off events. For 432845/432847 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 84135 event pairs, 2054 based on Foata normal form. 6/10103 useless extension candidates. Maximal degree in co-relation 68278. Up to 8300 conditions per place. [2024-06-21 19:48:38,040 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 316 selfloop transitions, 55 changer transitions 0/383 dead transitions. [2024-06-21 19:48:38,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 383 transitions, 7669 flow [2024-06-21 19:48:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:48:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:48:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-21 19:48:38,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 19:48:38,041 INFO L175 Difference]: Start difference. First operand has 285 places, 343 transitions, 6563 flow. Second operand 8 states and 216 transitions. [2024-06-21 19:48:38,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 383 transitions, 7669 flow [2024-06-21 19:48:39,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 383 transitions, 7523 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-06-21 19:48:39,873 INFO L231 Difference]: Finished difference. Result has 292 places, 347 transitions, 6615 flow [2024-06-21 19:48:39,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6615, PETRI_PLACES=292, PETRI_TRANSITIONS=347} [2024-06-21 19:48:39,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 237 predicate places. [2024-06-21 19:48:39,874 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 347 transitions, 6615 flow [2024-06-21 19:48:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:39,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:39,874 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, 1, 1, 1] [2024-06-21 19:48:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:48:39,874 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:39,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1516944461, now seen corresponding path program 3 times [2024-06-21 19:48:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:39,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962146247] [2024-06-21 19:48:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:40,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:40,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962146247] [2024-06-21 19:48:40,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962146247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:40,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608855937] [2024-06-21 19:48:40,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:40,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:40,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:40,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:40,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 347 transitions, 6615 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:40,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:40,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:40,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:42,056 INFO L124 PetriNetUnfolderBase]: 6129/10684 cut-off events. [2024-06-21 19:48:42,057 INFO L125 PetriNetUnfolderBase]: For 479947/479966 co-relation queries the response was YES. [2024-06-21 19:48:42,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70816 conditions, 10684 events. 6129/10684 cut-off events. For 479947/479966 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 87144 event pairs, 1645 based on Foata normal form. 22/10532 useless extension candidates. Maximal degree in co-relation 70680. Up to 5739 conditions per place. [2024-06-21 19:48:42,416 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 292 selfloop transitions, 117 changer transitions 0/421 dead transitions. [2024-06-21 19:48:42,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 421 transitions, 8632 flow [2024-06-21 19:48:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 19:48:42,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2024-06-21 19:48:42,417 INFO L175 Difference]: Start difference. First operand has 292 places, 347 transitions, 6615 flow. Second operand 7 states and 202 transitions. [2024-06-21 19:48:42,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 421 transitions, 8632 flow [2024-06-21 19:48:44,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 421 transitions, 8387 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:44,213 INFO L231 Difference]: Finished difference. Result has 295 places, 362 transitions, 7068 flow [2024-06-21 19:48:44,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7068, PETRI_PLACES=295, PETRI_TRANSITIONS=362} [2024-06-21 19:48:44,213 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 240 predicate places. [2024-06-21 19:48:44,214 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 362 transitions, 7068 flow [2024-06-21 19:48:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:44,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:44,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:44,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:48:44,214 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:44,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash 231980271, now seen corresponding path program 4 times [2024-06-21 19:48:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276316088] [2024-06-21 19:48:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:44,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276316088] [2024-06-21 19:48:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276316088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:44,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220357891] [2024-06-21 19:48:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:44,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:44,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 362 transitions, 7068 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:44,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:44,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:44,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:46,494 INFO L124 PetriNetUnfolderBase]: 6385/11060 cut-off events. [2024-06-21 19:48:46,494 INFO L125 PetriNetUnfolderBase]: For 546855/546861 co-relation queries the response was YES. [2024-06-21 19:48:46,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75830 conditions, 11060 events. 6385/11060 cut-off events. For 546855/546861 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 90467 event pairs, 1003 based on Foata normal form. 17/10889 useless extension candidates. Maximal degree in co-relation 75692. Up to 7273 conditions per place. [2024-06-21 19:48:46,651 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 336 selfloop transitions, 62 changer transitions 0/410 dead transitions. [2024-06-21 19:48:46,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 410 transitions, 8299 flow [2024-06-21 19:48:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:46,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-21 19:48:46,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-21 19:48:46,652 INFO L175 Difference]: Start difference. First operand has 295 places, 362 transitions, 7068 flow. Second operand 7 states and 200 transitions. [2024-06-21 19:48:46,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 410 transitions, 8299 flow [2024-06-21 19:48:49,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 410 transitions, 8130 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-06-21 19:48:49,198 INFO L231 Difference]: Finished difference. Result has 302 places, 368 transitions, 7249 flow [2024-06-21 19:48:49,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=6909, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7249, PETRI_PLACES=302, PETRI_TRANSITIONS=368} [2024-06-21 19:48:49,198 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 247 predicate places. [2024-06-21 19:48:49,198 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 368 transitions, 7249 flow [2024-06-21 19:48:49,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:49,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:49,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:49,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:48:49,199 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:49,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:49,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2013709623, now seen corresponding path program 5 times [2024-06-21 19:48:49,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:49,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882144761] [2024-06-21 19:48:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:49,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:49,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:49,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882144761] [2024-06-21 19:48:49,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882144761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:49,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:49,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212130959] [2024-06-21 19:48:49,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:49,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:49,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:49,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:49,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 368 transitions, 7249 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:49,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:49,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:49,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:51,532 INFO L124 PetriNetUnfolderBase]: 6596/11385 cut-off events. [2024-06-21 19:48:51,532 INFO L125 PetriNetUnfolderBase]: For 609973/609979 co-relation queries the response was YES. [2024-06-21 19:48:51,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80499 conditions, 11385 events. 6596/11385 cut-off events. For 609973/609979 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 93089 event pairs, 1413 based on Foata normal form. 21/11220 useless extension candidates. Maximal degree in co-relation 80358. Up to 4667 conditions per place. [2024-06-21 19:48:51,705 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 258 selfloop transitions, 150 changer transitions 0/420 dead transitions. [2024-06-21 19:48:51,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 420 transitions, 9057 flow [2024-06-21 19:48:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 19:48:51,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 19:48:51,706 INFO L175 Difference]: Start difference. First operand has 302 places, 368 transitions, 7249 flow. Second operand 6 states and 180 transitions. [2024-06-21 19:48:51,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 420 transitions, 9057 flow [2024-06-21 19:48:53,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 420 transitions, 8815 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:53,889 INFO L231 Difference]: Finished difference. Result has 306 places, 377 transitions, 7713 flow [2024-06-21 19:48:53,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7007, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7713, PETRI_PLACES=306, PETRI_TRANSITIONS=377} [2024-06-21 19:48:53,889 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 251 predicate places. [2024-06-21 19:48:53,889 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 377 transitions, 7713 flow [2024-06-21 19:48:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:53,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:53,889 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, 1, 1, 1] [2024-06-21 19:48:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:48:53,889 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:53,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 232100427, now seen corresponding path program 3 times [2024-06-21 19:48:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843220301] [2024-06-21 19:48:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843220301] [2024-06-21 19:48:54,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843220301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:54,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:54,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385739489] [2024-06-21 19:48:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:54,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:54,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:54,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:54,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 377 transitions, 7713 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:54,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:54,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:54,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:56,321 INFO L124 PetriNetUnfolderBase]: 6584/11413 cut-off events. [2024-06-21 19:48:56,321 INFO L125 PetriNetUnfolderBase]: For 619766/619768 co-relation queries the response was YES. [2024-06-21 19:48:56,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81217 conditions, 11413 events. 6584/11413 cut-off events. For 619766/619768 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 93886 event pairs, 2541 based on Foata normal form. 6/11177 useless extension candidates. Maximal degree in co-relation 81074. Up to 9380 conditions per place. [2024-06-21 19:48:56,487 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 353 selfloop transitions, 42 changer transitions 0/407 dead transitions. [2024-06-21 19:48:56,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 407 transitions, 8685 flow [2024-06-21 19:48:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 19:48:56,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544871794871795 [2024-06-21 19:48:56,488 INFO L175 Difference]: Start difference. First operand has 306 places, 377 transitions, 7713 flow. Second operand 6 states and 173 transitions. [2024-06-21 19:48:56,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 407 transitions, 8685 flow [2024-06-21 19:48:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 407 transitions, 8277 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:58,991 INFO L231 Difference]: Finished difference. Result has 309 places, 377 transitions, 7397 flow [2024-06-21 19:48:58,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7397, PETRI_PLACES=309, PETRI_TRANSITIONS=377} [2024-06-21 19:48:58,991 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 254 predicate places. [2024-06-21 19:48:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 377 transitions, 7397 flow [2024-06-21 19:48:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:58,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:58,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:48:58,992 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:48:58,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 431282061, now seen corresponding path program 6 times [2024-06-21 19:48:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:58,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052766647] [2024-06-21 19:48:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052766647] [2024-06-21 19:48:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052766647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:59,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:59,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419193650] [2024-06-21 19:48:59,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:59,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:59,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:59,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:48:59,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 377 transitions, 7397 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:59,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:59,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:48:59,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:01,660 INFO L124 PetriNetUnfolderBase]: 7219/12464 cut-off events. [2024-06-21 19:49:01,660 INFO L125 PetriNetUnfolderBase]: For 686790/686798 co-relation queries the response was YES. [2024-06-21 19:49:01,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88432 conditions, 12464 events. 7219/12464 cut-off events. For 686790/686798 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 103108 event pairs, 1969 based on Foata normal form. 18/12274 useless extension candidates. Maximal degree in co-relation 88288. Up to 9071 conditions per place. [2024-06-21 19:49:01,836 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 355 selfloop transitions, 130 changer transitions 0/497 dead transitions. [2024-06-21 19:49:01,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 497 transitions, 10072 flow [2024-06-21 19:49:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-21 19:49:01,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-21 19:49:01,837 INFO L175 Difference]: Start difference. First operand has 309 places, 377 transitions, 7397 flow. Second operand 7 states and 223 transitions. [2024-06-21 19:49:01,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 497 transitions, 10072 flow [2024-06-21 19:49:04,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 497 transitions, 9993 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 19:49:04,348 INFO L231 Difference]: Finished difference. Result has 316 places, 431 transitions, 9084 flow [2024-06-21 19:49:04,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9084, PETRI_PLACES=316, PETRI_TRANSITIONS=431} [2024-06-21 19:49:04,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 261 predicate places. [2024-06-21 19:49:04,349 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 431 transitions, 9084 flow [2024-06-21 19:49:04,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:04,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:04,349 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, 1, 1, 1] [2024-06-21 19:49:04,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:49:04,349 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:04,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -877350481, now seen corresponding path program 7 times [2024-06-21 19:49:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766944588] [2024-06-21 19:49:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:04,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:04,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766944588] [2024-06-21 19:49:04,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766944588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:04,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:04,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:04,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764691861] [2024-06-21 19:49:04,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:04,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:04,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:04,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 431 transitions, 9084 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:04,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:04,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:04,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:07,258 INFO L124 PetriNetUnfolderBase]: 7734/13295 cut-off events. [2024-06-21 19:49:07,259 INFO L125 PetriNetUnfolderBase]: For 799702/799708 co-relation queries the response was YES. [2024-06-21 19:49:07,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98067 conditions, 13295 events. 7734/13295 cut-off events. For 799702/799708 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 110361 event pairs, 1134 based on Foata normal form. 21/13078 useless extension candidates. Maximal degree in co-relation 97918. Up to 7355 conditions per place. [2024-06-21 19:49:07,453 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 292 selfloop transitions, 205 changer transitions 0/509 dead transitions. [2024-06-21 19:49:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 509 transitions, 11278 flow [2024-06-21 19:49:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-21 19:49:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-21 19:49:07,454 INFO L175 Difference]: Start difference. First operand has 316 places, 431 transitions, 9084 flow. Second operand 7 states and 205 transitions. [2024-06-21 19:49:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 509 transitions, 11278 flow [2024-06-21 19:49:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 509 transitions, 11142 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-06-21 19:49:10,790 INFO L231 Difference]: Finished difference. Result has 325 places, 467 transitions, 10423 flow [2024-06-21 19:49:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=8956, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10423, PETRI_PLACES=325, PETRI_TRANSITIONS=467} [2024-06-21 19:49:10,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 270 predicate places. [2024-06-21 19:49:10,791 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 467 transitions, 10423 flow [2024-06-21 19:49:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:10,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:10,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:49:10,791 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:10,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1164475575, now seen corresponding path program 8 times [2024-06-21 19:49:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:10,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492541942] [2024-06-21 19:49:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:10,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:11,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:11,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492541942] [2024-06-21 19:49:11,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492541942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:11,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:11,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402274306] [2024-06-21 19:49:11,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:11,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:11,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:11,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:11,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:11,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 467 transitions, 10423 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:11,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:11,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:11,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:13,977 INFO L124 PetriNetUnfolderBase]: 7890/13509 cut-off events. [2024-06-21 19:49:13,977 INFO L125 PetriNetUnfolderBase]: For 883044/883050 co-relation queries the response was YES. [2024-06-21 19:49:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104362 conditions, 13509 events. 7890/13509 cut-off events. For 883044/883050 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 112194 event pairs, 1657 based on Foata normal form. 17/13294 useless extension candidates. Maximal degree in co-relation 104208. Up to 4925 conditions per place. [2024-06-21 19:49:14,187 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 263 selfloop transitions, 252 changer transitions 0/527 dead transitions. [2024-06-21 19:49:14,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 527 transitions, 12601 flow [2024-06-21 19:49:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-21 19:49:14,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552884615384616 [2024-06-21 19:49:14,188 INFO L175 Difference]: Start difference. First operand has 325 places, 467 transitions, 10423 flow. Second operand 8 states and 231 transitions. [2024-06-21 19:49:14,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 527 transitions, 12601 flow [2024-06-21 19:49:18,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 527 transitions, 12299 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-21 19:49:18,367 INFO L231 Difference]: Finished difference. Result has 333 places, 478 transitions, 11217 flow [2024-06-21 19:49:18,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10121, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11217, PETRI_PLACES=333, PETRI_TRANSITIONS=478} [2024-06-21 19:49:18,368 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 278 predicate places. [2024-06-21 19:49:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 478 transitions, 11217 flow [2024-06-21 19:49:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:18,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:18,368 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, 1, 1, 1] [2024-06-21 19:49:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:49:18,368 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:18,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2007996169, now seen corresponding path program 4 times [2024-06-21 19:49:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:18,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159456868] [2024-06-21 19:49:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159456868] [2024-06-21 19:49:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159456868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:18,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:18,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:18,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823018458] [2024-06-21 19:49:18,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:18,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:18,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:18,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:18,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:18,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:18,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 478 transitions, 11217 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:18,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:18,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:18,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:21,615 INFO L124 PetriNetUnfolderBase]: 7866/13610 cut-off events. [2024-06-21 19:49:21,616 INFO L125 PetriNetUnfolderBase]: For 872836/872838 co-relation queries the response was YES. [2024-06-21 19:49:21,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106064 conditions, 13610 events. 7866/13610 cut-off events. For 872836/872838 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 114531 event pairs, 2722 based on Foata normal form. 10/13315 useless extension candidates. Maximal degree in co-relation 105905. Up to 11187 conditions per place. [2024-06-21 19:49:21,838 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 444 selfloop transitions, 52 changer transitions 0/508 dead transitions. [2024-06-21 19:49:21,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 508 transitions, 12287 flow [2024-06-21 19:49:21,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 19:49:21,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-21 19:49:21,839 INFO L175 Difference]: Start difference. First operand has 333 places, 478 transitions, 11217 flow. Second operand 7 states and 193 transitions. [2024-06-21 19:49:21,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 508 transitions, 12287 flow [2024-06-21 19:49:26,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 508 transitions, 11907 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:26,575 INFO L231 Difference]: Finished difference. Result has 338 places, 478 transitions, 10963 flow [2024-06-21 19:49:26,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10963, PETRI_PLACES=338, PETRI_TRANSITIONS=478} [2024-06-21 19:49:26,576 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 283 predicate places. [2024-06-21 19:49:26,576 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 478 transitions, 10963 flow [2024-06-21 19:49:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:26,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:26,577 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, 1, 1, 1, 1] [2024-06-21 19:49:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:49:26,577 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:26,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash 557048751, now seen corresponding path program 9 times [2024-06-21 19:49:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:26,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732911154] [2024-06-21 19:49:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:27,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732911154] [2024-06-21 19:49:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732911154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:27,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:27,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:27,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916784991] [2024-06-21 19:49:27,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:27,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:27,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 478 transitions, 10963 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:27,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:27,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:27,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:30,855 INFO L124 PetriNetUnfolderBase]: 8010/13807 cut-off events. [2024-06-21 19:49:30,855 INFO L125 PetriNetUnfolderBase]: For 942882/942888 co-relation queries the response was YES. [2024-06-21 19:49:31,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107076 conditions, 13807 events. 8010/13807 cut-off events. For 942882/942888 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 116124 event pairs, 1484 based on Foata normal form. 29/13600 useless extension candidates. Maximal degree in co-relation 106916. Up to 4941 conditions per place. [2024-06-21 19:49:31,147 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 252 selfloop transitions, 276 changer transitions 0/540 dead transitions. [2024-06-21 19:49:31,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 540 transitions, 13235 flow [2024-06-21 19:49:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:49:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:49:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-21 19:49:31,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2024-06-21 19:49:31,149 INFO L175 Difference]: Start difference. First operand has 338 places, 478 transitions, 10963 flow. Second operand 9 states and 250 transitions. [2024-06-21 19:49:31,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 540 transitions, 13235 flow [2024-06-21 19:49:35,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 540 transitions, 13137 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:49:35,242 INFO L231 Difference]: Finished difference. Result has 344 places, 489 transitions, 12087 flow [2024-06-21 19:49:35,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10865, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12087, PETRI_PLACES=344, PETRI_TRANSITIONS=489} [2024-06-21 19:49:35,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 289 predicate places. [2024-06-21 19:49:35,243 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 489 transitions, 12087 flow [2024-06-21 19:49:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:35,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:35,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:35,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:49:35,244 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:35,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1629130307, now seen corresponding path program 5 times [2024-06-21 19:49:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285162577] [2024-06-21 19:49:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:35,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:35,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285162577] [2024-06-21 19:49:35,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285162577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:35,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:35,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689331828] [2024-06-21 19:49:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:35,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:35,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 489 transitions, 12087 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:35,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:35,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:35,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:38,949 INFO L124 PetriNetUnfolderBase]: 7998/13872 cut-off events. [2024-06-21 19:49:38,949 INFO L125 PetriNetUnfolderBase]: For 939294/939296 co-relation queries the response was YES. [2024-06-21 19:49:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110515 conditions, 13872 events. 7998/13872 cut-off events. For 939294/939296 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 117407 event pairs, 2752 based on Foata normal form. 6/13566 useless extension candidates. Maximal degree in co-relation 110353. Up to 11259 conditions per place. [2024-06-21 19:49:39,131 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 435 selfloop transitions, 78 changer transitions 0/525 dead transitions. [2024-06-21 19:49:39,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 525 transitions, 13207 flow [2024-06-21 19:49:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 19:49:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216346153846154 [2024-06-21 19:49:39,132 INFO L175 Difference]: Start difference. First operand has 344 places, 489 transitions, 12087 flow. Second operand 8 states and 217 transitions. [2024-06-21 19:49:39,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 525 transitions, 13207 flow [2024-06-21 19:49:44,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 525 transitions, 12692 flow, removed 141 selfloop flow, removed 5 redundant places. [2024-06-21 19:49:44,429 INFO L231 Difference]: Finished difference. Result has 347 places, 489 transitions, 11746 flow [2024-06-21 19:49:44,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11746, PETRI_PLACES=347, PETRI_TRANSITIONS=489} [2024-06-21 19:49:44,430 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 292 predicate places. [2024-06-21 19:49:44,430 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 489 transitions, 11746 flow [2024-06-21 19:49:44,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:44,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:44,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:44,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:49:44,431 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:44,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2067493589, now seen corresponding path program 10 times [2024-06-21 19:49:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420991468] [2024-06-21 19:49:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:44,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:44,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420991468] [2024-06-21 19:49:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420991468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:44,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:44,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561368684] [2024-06-21 19:49:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:44,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:44,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 489 transitions, 11746 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:44,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:44,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:44,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:48,130 INFO L124 PetriNetUnfolderBase]: 8033/13887 cut-off events. [2024-06-21 19:49:48,130 INFO L125 PetriNetUnfolderBase]: For 963649/963762 co-relation queries the response was YES. [2024-06-21 19:49:48,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109054 conditions, 13887 events. 8033/13887 cut-off events. For 963649/963762 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 117589 event pairs, 2787 based on Foata normal form. 92/13726 useless extension candidates. Maximal degree in co-relation 108891. Up to 7307 conditions per place. [2024-06-21 19:49:48,345 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 353 selfloop transitions, 188 changer transitions 0/553 dead transitions. [2024-06-21 19:49:48,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 553 transitions, 14128 flow [2024-06-21 19:49:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 19:49:48,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302197802197802 [2024-06-21 19:49:48,346 INFO L175 Difference]: Start difference. First operand has 347 places, 489 transitions, 11746 flow. Second operand 7 states and 193 transitions. [2024-06-21 19:49:48,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 553 transitions, 14128 flow [2024-06-21 19:49:52,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 553 transitions, 13916 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:49:52,958 INFO L231 Difference]: Finished difference. Result has 348 places, 504 transitions, 12468 flow [2024-06-21 19:49:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11550, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12468, PETRI_PLACES=348, PETRI_TRANSITIONS=504} [2024-06-21 19:49:52,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 293 predicate places. [2024-06-21 19:49:52,958 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 504 transitions, 12468 flow [2024-06-21 19:49:52,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:52,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:52,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:49:52,959 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:49:52,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 864546103, now seen corresponding path program 1 times [2024-06-21 19:49:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575851218] [2024-06-21 19:49:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575851218] [2024-06-21 19:49:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575851218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435899865] [2024-06-21 19:49:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:53,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:53,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:49:53,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 504 transitions, 12468 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:53,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:53,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:49:53,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:57,132 INFO L124 PetriNetUnfolderBase]: 8401/14596 cut-off events. [2024-06-21 19:49:57,132 INFO L125 PetriNetUnfolderBase]: For 1066213/1066219 co-relation queries the response was YES. [2024-06-21 19:49:57,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114510 conditions, 14596 events. 8401/14596 cut-off events. For 1066213/1066219 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 124622 event pairs, 1290 based on Foata normal form. 77/14394 useless extension candidates. Maximal degree in co-relation 114346. Up to 8514 conditions per place. [2024-06-21 19:49:57,358 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 347 selfloop transitions, 192 changer transitions 3/554 dead transitions. [2024-06-21 19:49:57,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 554 transitions, 14095 flow [2024-06-21 19:49:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-21 19:49:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659340659340659 [2024-06-21 19:49:57,359 INFO L175 Difference]: Start difference. First operand has 348 places, 504 transitions, 12468 flow. Second operand 7 states and 206 transitions. [2024-06-21 19:49:57,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 554 transitions, 14095 flow [2024-06-21 19:50:03,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 554 transitions, 13609 flow, removed 106 selfloop flow, removed 2 redundant places. [2024-06-21 19:50:03,807 INFO L231 Difference]: Finished difference. Result has 354 places, 512 transitions, 12711 flow [2024-06-21 19:50:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12711, PETRI_PLACES=354, PETRI_TRANSITIONS=512} [2024-06-21 19:50:03,808 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 299 predicate places. [2024-06-21 19:50:03,808 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 512 transitions, 12711 flow [2024-06-21 19:50:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:03,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:03,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:50:03,808 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:50:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2083395231, now seen corresponding path program 2 times [2024-06-21 19:50:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122397269] [2024-06-21 19:50:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:04,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122397269] [2024-06-21 19:50:04,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122397269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:04,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:04,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557804811] [2024-06-21 19:50:04,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:04,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:04,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:04,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:50:04,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 512 transitions, 12711 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:04,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:04,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:50:04,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:07,986 INFO L124 PetriNetUnfolderBase]: 8617/14880 cut-off events. [2024-06-21 19:50:07,986 INFO L125 PetriNetUnfolderBase]: For 1187078/1187084 co-relation queries the response was YES. [2024-06-21 19:50:08,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116055 conditions, 14880 events. 8617/14880 cut-off events. For 1187078/1187084 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 126227 event pairs, 1398 based on Foata normal form. 109/14737 useless extension candidates. Maximal degree in co-relation 115888. Up to 8706 conditions per place. [2024-06-21 19:50:08,217 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 318 selfloop transitions, 235 changer transitions 4/569 dead transitions. [2024-06-21 19:50:08,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 569 transitions, 14442 flow [2024-06-21 19:50:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 19:50:08,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-21 19:50:08,218 INFO L175 Difference]: Start difference. First operand has 354 places, 512 transitions, 12711 flow. Second operand 8 states and 229 transitions. [2024-06-21 19:50:08,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 569 transitions, 14442 flow [2024-06-21 19:50:13,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 569 transitions, 14189 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-21 19:50:13,777 INFO L231 Difference]: Finished difference. Result has 360 places, 523 transitions, 13415 flow [2024-06-21 19:50:13,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=12476, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13415, PETRI_PLACES=360, PETRI_TRANSITIONS=523} [2024-06-21 19:50:13,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 305 predicate places. [2024-06-21 19:50:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 523 transitions, 13415 flow [2024-06-21 19:50:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:50:13,778 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:50:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash -361692345, now seen corresponding path program 3 times [2024-06-21 19:50:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346031413] [2024-06-21 19:50:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:14,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:14,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346031413] [2024-06-21 19:50:14,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346031413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:14,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:14,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:14,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059604752] [2024-06-21 19:50:14,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:14,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:14,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:14,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:14,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 19:50:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 523 transitions, 13415 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:14,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:14,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 19:50:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:17,823 INFO L124 PetriNetUnfolderBase]: 8201/14036 cut-off events. [2024-06-21 19:50:17,824 INFO L125 PetriNetUnfolderBase]: For 1023812/1023818 co-relation queries the response was YES. [2024-06-21 19:50:17,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109377 conditions, 14036 events. 8201/14036 cut-off events. For 1023812/1023818 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 116197 event pairs, 2099 based on Foata normal form. 101/13955 useless extension candidates. Maximal degree in co-relation 109208. Up to 8626 conditions per place. [2024-06-21 19:50:18,032 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 309 selfloop transitions, 231 changer transitions 7/559 dead transitions. [2024-06-21 19:50:18,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 559 transitions, 14619 flow [2024-06-21 19:50:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:50:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:50:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 19:50:18,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2024-06-21 19:50:18,033 INFO L175 Difference]: Start difference. First operand has 360 places, 523 transitions, 13415 flow. Second operand 7 states and 202 transitions. [2024-06-21 19:50:18,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 559 transitions, 14619 flow [2024-06-21 19:50:22,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 559 transitions, 14064 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:22,973 INFO L231 Difference]: Finished difference. Result has 361 places, 516 transitions, 13330 flow [2024-06-21 19:50:22,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=12860, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13330, PETRI_PLACES=361, PETRI_TRANSITIONS=516} [2024-06-21 19:50:22,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 306 predicate places. [2024-06-21 19:50:22,974 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 516 transitions, 13330 flow [2024-06-21 19:50:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:22,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:22,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:22,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:50:22,975 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 19:50:22,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2039991233, now seen corresponding path program 4 times [2024-06-21 19:50:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:22,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897911394] [2024-06-21 19:50:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat